LimeMicro:LMS6002D Datasheet

Summary

The Lime Microsystems LMS6002D is a multi-band, multi-standard transceiver with integrated dual digital to analogue (DAC) and analogue to digital (ADC) converters.

Features

• Single chip transceiver covering 0.3-3.8GHz frequency range
• Digital interface to baseband with integrated 12 bit D/A and A/D converters
• Fully differential baseband signals
• Few external components
• Programmable modulation bandwidth: 1.5, 1.75, 2.5, 2.75, 3, 3.84, 5, 5.5, 6, 7, 8.75, 10, 12, 14, 20 and 28MHz
• Supports both TDD and FDD operation modes
• Low voltage operation, 1.8V and 3.3V
• 120-pin DQFN package
• Power down option
• Serial port interface

Applications

• Femtocell and Picocell base stations
• Repeaters
• Broadband wireless communication devices for WCDMA/HSPA, LTE, GSM, CDMA2000, IEEE® 802.16x radios

Functional Block Diagram

LMS6002D Functional Block Diagram

General Description

The LMS6002D is a fully integrated, multi-band, multi-standard RF transceiver for 3GPP (WCDMA/HSPA, LTE), 3GPP2 (CDMA2000) and 4G LTE applications, as well as for GSM pico BTS. It combines the LNA, PA driver, RX/TX mixers, RX/TX filters, synthesizers, RX gain control, and TX power control with very few external components.

The top level architecture of LMS6002D transceiver is shown in the functional block diagram. Both transmitter and receiver are implemented as zero IF architectures providing up to 28MHz modulation bandwidth (equivalent to 14MHz baseband IQ bandwidth).

On the transmit side, IQ DAC samples from the baseband processor are provided to the LMS6002D on a 12 bit multiplexed parallel CMOS input level bus. Analogue IQ signals are generated by on chip transmit DACs. These are fed to the TXINI and TXINQ inputs. Transmit low pass filters (TXLPF) remove the images generated by zero hold effect of the DACs. The IQ signals are then amplified (TXVGA1) and DC offset is inserted in the IQ path by LO leakage DACs in order to cancel the LO leakage. The IQ signals are then mixed with the transmit PLL (TXPLL) output to produce a modulated RF signal. This RF signal is then split and amplified by two separate variable gain amplifiers (TXVGA2) and two off chip outputs are provided as RF output.

Transmitter gain control range of 56dB is provided by IF (TXVGA1, 31dB range) and RF (TXVGA2, 25 dB range) variable gain amplifiers. Both TXVGAs have 1dB gain step control.

The LMS6002D provides an RF loop back option (see the functional block diagram) which enables the TX RF signal to be fed back into the baseband for calibration and test purposes. The RF loop back signal is amplified by an auxiliary PA (AUXPA) in order to increase the dynamic range of the loop.

On the receive side, three separate inputs are provided each with a dedicated LNA. Each port preconditioned RF signal is first amplified by a programmable low noise amplifier (RXLNA). The RF signal is then mixed with the receive PLL (RXPLL) output to directly down convert to baseband. Large AGC steps can be implemented by an IF amplifier (RXVGA1) prior to the programmable bandwidth lowpass channel select filters (RXLPF). The received IQ signal is further amplified by a programmable gain amplifier RXVGA2. DC offset is applied at the input of RXVGA2 to prevent saturation and to preserve receive the ADC(s) dynamic range. The resulting analogue receive IQ signals are converted into the digital domain using the on chip receive ADCs and provided as an output to the baseband processor on a multiplexed 12 bit CMOS output level parallel bus. The receive clock, RX_CLK, is provided off chip at the RX_CLK_OUT pin and can be used to synchronise with the baseband digital receive data sampling clock.

By closing the RXOUT switch and powering down RXVGA2, the RXOUTI and RXOUTQ pins can be used as IQ ADCs inputs. In this configuration the ADCs can be used to measure two external signals, such as an off chip PA temperature sensor or peak detector.

Two transmitter outputs (TXOUT1, TXOUT2) and three receiver inputs (RXIN1, RXIN2, RXIN3) are provided to facilitate multi-band operation.

The functionality of the LMS6002D is fully controlled by a set of internal registers which can be accessed through a serial port.

In order to enable full duplex operation, the LMS6002D contains two separate synthesisers (TXPLL, RXPLL) both driven from the same reference clock source PLLCLK. The PLLCLK signal is provided at the PLLCLKOUT output pin and can be used as the baseband clock.

Differential signalling is done in the receive and transmit analogue paths throughout the chip.

Specifications

General Specifications

Parameter	Condition/Comment	Min	Typ	Max	Unit
TRX RF Frequency Range		0.3		3.8	GHz
Baseband Bandwidth		0.75		14	MHz
Frequency Resolution	Using 41MHz PLL reference clock			2.4	Hz
TRX 3.3V Supply		3.1	3.3	3.5	V
TRX 1.8V Supply		1.7	1.8	1.9	V
TX Supply Current	At maximum gain		280		mA
RX Supply Current	At maximum gain		220		mA
Digital Core Supply Voltage		1.7	1.8	1.9	V
Digital Peripheral (IO) Supply Voltage	Can go below 3.3V nominal to support LV CMOS signalling	1.7	3.3	3.5	V
Ambient Temperature		-40	25	85	°C
Storage Temperature		-65		125	°C
Maximum RF Output Power	Continuous wave		6		dBm
Absolute Maximum RF Input Power	No damage	23			dBm
PLL Reference Clock	For continuous LO frequency range	23		41	MHz
PLL Phase Noise	1MHz offset		-125		dBc/Hz

RF Specifications

Parameter	Condition/Comment	Min	Typ	Max	Unit
TRX RF Bandwidth		0.3		3.8	GHz
Transmit Input Impedance	Differential, programmable		100		Ohms
Transmit Load Impedance	Differential		65		Ohms
Transmit Differential I and Q Input Voltages	Differential		250		mVpp
	Common mode		65		mV
Transmit Gain Control Range	TXVGA1, TXVGA2		56		dB
Transmit Gain Control Step			1		dB
TX LO Leakage	LO leakage not calibrated		-50		dBc
RX LNA1 Frequency Range	Narrow band	0.3		2.8	GHz
RX LNA2 Frequency Range	Narrow band	1.5		3.8	GHz
RX LNA3 Frequency Range	Broad band	0.3		3.8	GHz
RX LNA1 Input Impedance	Differential		50		Ohms
RX LNA2 Input Impedance	Differential		50		Ohms
RX LNA3 Input Impedance	Differential		200		Ohms
Receive Load Impedance	Differential		2K		Ohms
Receive Load Capacitance			5		pF
Noise Figure	LNA1 at 0.95GHz		3.5		dB
	LNA2 at 1.95GHz		5.5
	LNA3 at 1.95GHz		10
3rd Order Input Referred Intercept Point	LNA2 at Mid. Gain		-1		dBm
Receive Gain Control Range	RXLNA, RXVGA1, RXVGA2		61		dBm
Receive Gain Control Step	RXVGA1, not log-linear			1	dB
	RXVGA2		3

Gain Control

TX Gain Control

LMS6002D TX Gain Control Architecture

The LMS6002D transmitter has two programmable gain stages: TXVGA1, located in the IF section; and TXVGA2, in the RF section. TXVGA1 is implemented on the I and Q branches but controlled by a single control word. TXVGA2 consists of 2 amplifiers one for each of the transmitter outputs, however only one of these output amplifiers can be active at any time.

Note: The TXLPF has a gain of 6dB or 0dB when bypassed.

Parameter	Condition	Min	Typ	Max	Unit
TXLPF Gain	0dB gain when bypassed	0		6	dB
TXVGA1 Gain Control Range			31		dB
TXVGA1 Gain Step Size	Guaranteed monotonic		1		dB
TXVGA2 Gain Control Range			25		dB
TXVGA2 Gain Step Size	Guaranteed monotonic		1		dB

RX Gain Control

LMS6002D RX Gain Control Architecture

The LMS6002D receiver has three gain control elements: RXLNA, RXVGA1, and RXVGA2. RXLNA gain control consists of a single 6dB step for AGC when large in co-channel blockers are present and a reduction in system NF is acceptable. The main LNAs (LNA1 and LNA2) have fine gain control via a 6 bit word which offers ±6dB control intended for frequency correction when large input bandwidths are required.

RXVGA1 offers 25dB of control range. A 7 bit control word is used and the response is not log-linear. Maximum step size is 1dB. RXVGA1 is intended for AGC steps needed to reduce system gain prior to the channel filters when large in band blockers are present. This gain can be under control of the baseband or fixed on calibration.

RXVGA2 provides the bulk of gain control for AGC if a constant RX signal level at the ADC input is required. It has 30dB gain range control in 3dB steps.

Note: RXLPF has a gain of 0dB when bypassed.

Parameter	Condition	Min	Typ	Max	Unit
RXLNA Gain Control Range	Single step	0		6	dB
RXVGA1 Gain Control Range			25		dB
RXVGA1 Gain Step Size	Not log-linear			1	dB
RXLPF Gain	0dB gain when bypassed	0		6	dB
RXVGA2 Gain Control Range			30		dB
RXVGA2 Gain Step Size	Guaranteed monotonic		3		dB

Synthesisers

LMS6002D PLL Architecture

The LMS6002D has two low phase noise synthesisers to enable full duplex operation. Both synthesisers are capable of output frequencies up to 3.8GHz. Each synthesiser uses a fractional-N PLL architecture. The same reference frequency is used for both synthesisers and is flexible between 23 to 41MHz. The synthesisers produce a complex output with suitable level to drive IQ mixers in both the TX and the RX paths.

The LMS6002D can accept clipped sine as well as the CMOS level signals as the PLL reference clock. Both DC and [#AC Coupled|AC]] coupling are supported. Internal buffer self biasing must be enabled for AC coupling mode. PLL reference clock input can also be low voltage CMOS (2.5V or 1.8V, for example) which is implemented by lowering clock buffer supply PVDDSPI33.

Parameter	Condition	Min	Typ	Max	Unit
Frequency Range		0.3		3.8	GHz
Reference Amplitude	At PVDDSPI33=3.3V	0.2	0.8	3.3	Vpp
Reference Frequency	For continuous LO frequency range	23		41	MHz
Frequency Step Size	At 41MHz reference clock			2.4	Hz
Phase Noise	800MHz				dBc/Hz
10KHz offset			-94
100KHz offset			-113
1MHz offset			-130
Phase Noise	1.9GHz
10KHz offset			-89
100KHz offset			-95
1MHz offset			-125
Phase Noise	2.6GHz
10KHz offset			-86
100KHz offset			-90
1MHz offset			-125
Reference Spurious Outputs				-50	dBc
Other Spurious Outputs				-50	dBc
IQ Phase Error	800MHz		1		deg
	1.9GHz		3
	2.6GHz		9
IQ Amplitude Error			0.4		dB
PLL Settling Time	To 1ppm, 50KHz loop bandwidth		20		μs

DC Coupled

LMS6002D PLL Reference Clock Input Buffer, DC Coupled

AC Coupled

LMS6002D PLL Reference Clock Input Buffer, AC Coupled

RF Ports

The LMS6002D has two transmitter outputs and three receiver inputs.

The transmitter output ports are optimized for a 65Ω differential load, the final stage amplifiers are open drain and require +3.3V voltage supply, see LMS6002D typical application circuit in the typical application circuit.

The receiver inputs are all different: RXIN1 is the low frequency input and can operate in the range 0.3 – 2.8GHz; RXIN2 is the high frequency input and can operate in the range 1.5 – 3.8GHz. Both RXIN1 and RXIN2 require matching circuits for optimum performance. A simple match is shown in the typical application circuit. RXIN3 is a broadband input covering the range 0.3 – 3.0GHz, it is 200Ω differential and is typically matched with a wideband transformer.

TX and RX Low Pass Filters

The LMS6002D integrates highly selective low pass filters in both TX and RX paths. Filters have a programmable pass band in order to provide more flexibility on the DAC/ADC clock frequency and also to provide excellent adjacent channel rejection in the receive chain. The following LPF pass bands are supported: 14, 10, 7, 6, 5, 4.375, 3.5, 3, 2.75, 2.5, 1.92, 1.5, 1.375, 1.25, 0.875, and 0.75MHz. Filters are also tunable to compensate for process/temperature variation. The TX and RX filters are the same but controlled via SPI link independently. Measured amplitude responses are shown in Amplitude Response.

Assuming 40MHz DAC/ADC clock, 28MHz modulation bandwidth (equivalent to 14MHz baseband IQ bandwidth) and 28MHz channel spacing, performance of the TRX filters is summarised as below.

TX Low Pass Filter Performance

• First DAC image attenuation >= 55dB
• Second DAC image attenuation >= 70dB

RX Low Pass Filter Performance

• Alias attenuation >= 50dB
• First adjacent channel attenuation >= 45 dB
• Second adjacent channel attenuation >= 70 dB

Amplitude Response

Calibration and Initialisation

There are a number of calibrations which the LMS6002D can carry out internally when instructed via the SPI. These calibrations can be initiated on power up/reset to produce optimum settings. The following auto calibration options are available:

• DC offset cancellation within the various blocks
• TRX LPF bandwidth tuning

Additionally, LMS6002D provides the blocks such as LO leakage DACs and RF loop back to further facilitate the following calibrations:

• LO leakage in the transmit chain
• IQ gain and phase mismatch in both transmit and receive chains

Note that these calibrations require the loop to be closed externally via the baseband.

Recommended Initialisation Sequence

1. Apply RESET pulse (active low). This sets all the configuration registers to their default values.
2. Set target LO frequency and gain for both TX and RX chains.
3. LPF tuning.
   1. DC offset cancellation of the tuning module
   2. Execute LPF bandwidth tuning procedure
4. TXLPF
   1. DC offset cancellation of I filter
   2. DC offset cancellation of Q filter
5. RXLPF
   1. DC offset cancellation of I filter
   2. DC offset cancellation of Q filter
6. RXVGA2
   1. DC offset cancellation of the reference generator
   2. DC offset cancellation of the first gain stage, I branch
   3. DC offset cancellation of the first gain stage, Q branch
   4. DC offset cancellation of the second gain stage, I branch
   5. DC offset cancellation of the second gain stage, Q branch
7. TX LO leakage cancellation
8. TX IQ gain/phase error calibration
9. RX IQ gain/phase error calibration

Once the device is calibrated, register values can be stored and uploaded back into LMS6002D at the next power up/reset point which will shorten the initialisation time. Refer to the LMS6002D Programming and Calibration Guide for more details.

Digital IQ Data Interface

Description

LMS6002D Baseband Data Interface

The functionality of LMS6002D transceiver implements a subset of the LimeLight LMS600X-01008031 digital IQ interface with a 12 bit multiplexed transmit path and a 12 bit multiplexed receive path. TX and RX interfaces require a clock running at twice the data converters sample rate. Separate clocks can be provided for the TX and RX interface. Location of the IQ samples in the multiplexed stream is flagged by the IQ select signals which are required as an input to the transmit path and provided as an output from the receive path.

Frame Sync Polarity and Interleave Modes

LMS6002D Frame Sync Polarity and Interleave Modes

For both TX and RX interfaces IQ_SEL (frame sync) polarity and interleave mode are independently programmable via the SPI link. Here, the frame is defined as two consecutive T(R)X_CLK, i.e. one T(R)X_IQ_SEL, periods while IQ data from the same sampling point are present on the multiplexed bus.

Transmitter Data Interface

A more detailed functional diagram of the TX data interface is shown above alongside corresponding waveforms. The interface is a 12 bit parallel bus from the base band IC carrying multiplexed IQ data samples for the transmit DACs. The interface data rate is twice the DACs sample rate. TX_IQ_SEL flag is used to identify I and Q samples on the multiplexed bus. Note that the DACs sampling clock is not derived by dividing TX_CLK by two as indicated in Frame Sync Polarity and Interleave Modes. Instead, registered version of TX_IQ_SEL is used. Hence, for the DACs to receive sampling clock TX_IQ_SEL must be provided and toggled as in Frame Sync Polarity and Interleave Modes. DACs sampling edge is also programmable via SPI link.

The TX digital IQ interface related pins are described as follows:

• TX_CLK
  • TX interface data clock, positive edge sensitive (input)
• TXD[11:0] - 12 bit multiplexed IQ data bus (input)
  • TX_IQ_SEL Indicates the location of I and Q data on the multiplexed bus (input)

Some examples of the TX interface data rates are provided below:

• DACs sample rate
  • WCDMA 15.36 MS/s
  • GSM 1.083 MS/s
• TX IQ interface data rate
  • WCDMA 30.72 MS/s
  • GSM 2.167 MS/s

Receiver Data Interface

A more detailed functional diagram of the RX data interface is shown above, alongside corresponding waveforms. The interface is a 12 bit parallel bus output from the LMS6002D to the base band IC carrying multiplexed IQ data samples from the receive ADCs. The interface data rate is twice the ADCs sample rate. RX_IQ_SEL flag is provided to identify I and Q samples on the multiplexed bus. The receive clock coming from the baseband is on chip divided by two before being used by the ADC’s. The ADCs sampling edge is also programmable via SPI link.

RX digital IQ interface related pins are described as follows:

• RX_CLK
  • RX interface data clock, positive edge sensitive (input)
• RXD[11:0]
  • 12 bit multiplexed IQ data bus (output)
• RX_IQ_SEL
  • Indicates the location of I and Q data on the multiplexed bus (output)

Some examples of the RX interface data rates are provided below:

• ADCs sample rate
  • WCDMA 15.36 MS/s
  • GSM 1.083 MS/s
• RX IQ interface data rate
  • WCDMA 30.72 MS/s
  • GSM 2.167 MS/s

IQ Interface Timing Parameters

Parameter	Min	Typ	Max	Unit
TX Setup Time (tSETUP)	1			ns
TX Hold Time (tHOLD)	0.2			ns
RX Output Delay (tOD at 15pF Load			6	ns

DACs Electrical Specifications

(At TA = 25°C, TAVDD33 = 3.3 V, FCLK = 40 MSPS, FOUT = 4 MHz, internal references, -1 dBFS input signal unless otherwise noted)

Parameter	Condition	Min	Typ	Max	Unit
Digital Core Supply		1.7	1.8	1.9	V
Analogue Supply		3.1	3.3	3.5	V
Number of Bits	Two's Complement format		12		bits
DAC Sampling Rate				40	MHz
Full Scale Current	Programmable		2.5		mA
Output Amplitude	At 100 Ohm differential load		250		mVpp diff.
SFDR			60		dBc
ENOB			10		bits

ADCs Electrical Specifications

(At TA = 25°C, RAVDD18 = 1.8 V, FCLK = 40 MSPS, FOUT = 4 MHz, internal references, -1 dBFS input signal unless otherwise noted)

Parameter	Condition	Min	Typ	Max	Unit
Digital Core Supply		1.7	1.8	1.9	V
Analogue Supply		1.7	1.8	1.9	V
Number of Bits	Two's Complement format		12		bits
ADC Sampling Rate				40	MHz
Input Amplitude	Differential		1	1.8	Vpp
Input Common Mode Voltage	Input buffer off		0.9		V
Input Impedance			2		kOhm
ENOB			10		bits

Digital IQ Interface IO Buffers Specifications

Parameter	Condition	Min	Typ	Max	Unit
Supply Voltage (PVDD)	Can go below 3.3V nominal to support LVCMOS signalling	1.7	3.3	3.5	V
Input High (VIH)		PVDD-0.8			V
Input Low (VIL)				0.8	V
Output High (VOH)		PVDD-0.4			V
Output Low (VOL)				0.4	V
Input Pad Capacitance (CIN)				3.5	pF
Output Drive Current1				8	mA

¹ Maximum peak current that flows when the output digital lines change state and begin charging the load capacitance.

Implementing Low Voltage Digital IQ Interface

LMS6002D Digital IQ Interface Supplies

Digital IO buffers in LMS6002D are supplied using four pins (PVDDAD33A - PVDDAD33D). All these pins must be supplied by the same supply PVDD. There is one additional supply pin (PVDDVGG) dedicated for ESD protection diodes supply. PVDDVGG must be supplied by +3.3V. However, PVDD can go below 3.3V to implement low voltage signaling. For example, if PVDD=2.5V then all data lines in the above figure are set to 2.5V CMOS IOs. Having PVDDVGG=3.3V sets all inputs to be 3.3V tolerant. Minimum PVDD is 1.8V.

Serial Port Interface

Description

The functionality of LMS6002D transceiver is fully controlled by a set of internal registers which can be accessed through a serial port interface. Both write and read SPI operations are supported. The serial port can be configured to run in 3 or 4 wire mode with the following pins used:

• SEN
  • serial port enable, active low
• SCLK
  • serial clock, positive edge sensitive
• SDIO
  • serial data in/out in 3 wire mode
  • serial data input in 4 wire mode
• SDO
  • serial data out in 4 wire mode
  • don’t care in 3 wire mode

Serial port key features:

• 16 SPI clock cycles are required to complete write operation.
• 16 SPI clock cycles are required to complete read operation.
• Multiple write/read operations are possible without toggling serial port enable signal.

All configuration registers are 8-bit wide. Write/read sequence consists of 8-bit instruction followed by 8-bit data to write or read. MSB of the instruction bit stream is used as SPI command where CMD=1 for write and CMD=0 for read. Remaining 7 bits of the instruction represent register address.

The write/read cycle waveforms are reproduced below. Note that the write operation is the same for both 3-wire and 4-wire modes. Although not shown in the figures, multiple byte write/read is possible by repeating the instruction/data sequence while keeping SEN low.

Write Operation Waveform

LMS6002D SPI Write Operation

Read Operation Waveform, 4-Wire (Default)

LMS6002D SPI Read Operation, 4-Wire (Default)

Read Operation Waveform, 3-Wire

LMS6002D SPI Read Operation, 3-Wire

SPI Memory Map

The LMS6002D configuration registers are divided into eight logical blocks. 3 MSBs of the available 7-bit address are used as block address while the remaining 4 bits are used to address particular registers within the block.

Integer and fractional part of the PLL divider are stored in four bytes of configuration memory. To change their values, four write cycles are required. Hence, the controlled PLL should see new NINT and NFRAC when all four bytes are updated, otherwise it will generate unpredicted and wrong LO frequency while being configured. Such parameters are provided through a shadow register. Shadow register outputs new values only when SEN is high, i.e. there is no access to configuration memory. For that reason, DSM (PLL) SPI synchronization clock, derived from the PLL reference, must be enabled while writing to or reading from the PLL configuration registers and should last at least two cycles more after SEN goes high.

Address (7 bits)	Description
000:xxxx	Top level configuration
001:xxxx	TX PLL
010:xxxx	RX PLL
011:xxxx	TX LPF
100:xxxx	TX RF
101:xxxx	RX LPF, DACs and ADCs
110:xxxx	RX VGA2
111:xxxx	RX RF

Implementing Low Voltage SPI

LMS6002D SPI Supplies

Digital IO buffers and ESD protection diodes in the SPI region are all supplied from a single pin PVDDSPI33. PVDDSPI33 can go below 3.3V to implement low voltage signaling. For example, if PVDDSPI33=2.5V then all data lines in the above figure, including PLL reference clock input, are set to 2.5V CMOS IOs. There is no dedicated ESD protection diodes supply here so when PVDDSPI33 is less than 3.3V, inputs will not be 3.3V tolerant. Minimum PVDDSPI33 is 1.8V.

Package Outline and Pin Description

LMS6002D DQFN120 Package, Top View

Pin No.	Pin Name	Type	Description	Note
1	PVDDAD33A	pads supply	ADCs/DACs IOs supply (3.3V)	Can be lowered down to 1.8V to support LV signalling
2	RXD11	out cmos	ADCs digital output, bit 11 (MSB)	Two's complement
3	RXD10	out cmos	ADCs digital output, bit 10
4	RXD9	out cmos	ADCs digital output, bit 9
5	RXD8	out cmos	ADCs digital output, bit 8
6	RXD7	out cmos	ADCs digital output, bit 7
7	PVDDVGG	esd supply	ADCs/DACs IOs ESD supply (3.3V)
8	RXD5	out cmos	ADCs digital output, bit 5
9	RXD6	out cmos	ADCs digital output, bit 6
10	RXD3	out cmos	ADCs digital output, bit 3
11	RXD4	out cmos	ADCs digital output, bit 4
12	PVDDAD33B	pads supply	ADCs/DACs IOs supply (3.3V)	Can be lowered down to 1.8V to support LV signalling
13	RXD2	out cmos	ADCs digital output, bit 2
14	RXD1	out cmos	ADCs digital output, bit 1
15	RXD0	out cmos	ADCs digital output, bit 0 (LSB)
16	RX_IQ_SEL	out cmos	RX digital interface IQ flag
17	RX_CLK	in cmos	RX digital interface clock
18	PVDDAD33C	pads supply	ADCs/DACs IOs supply (3.3V)	Can be lowered down to 1.8V to support LV signalling
19	TX_CLK	in cmos	TX digital interface clock
20	TX_IQ_SEL	in cmos	TX digital interface IQ flag
21	TXD0	in cmos	DACs digital input, bit 0 (LSB)
22	TXD1	in cmos	DACs digital input, bit 1
23	TXD2	in cmos	DACs digital input, bit 2
24	TXD3	in cmos	DACs digital input, bit 3
25	TXD4	in cmos	DACs digital input, bit 4
26	TXD5	in cmos	DACs digital input, bit 5
27	TXD6	in cmos	DACs digital input, bit 6
28	TXD7	in cmos	DACs digital input, bit 7
29	TXD8	in cmos	DACs digital input, bit 8
30	TXD9	in cmos	DACs digital input, bit 9
31	TXD10	in cmos	DACs digital input, bit 10
32	TXD11	in cmos	DACs digital input, bit 11 (MSB)	Two's complement
33	RDVDD18	digital supply	ADCs digital supply (1.8V)
34	PVDDAD33D	pads supply	ADCs/DACs pads supply (3.3V)	Can be lowered down to 1.8V to support LV signalling
35	RAVDD18	analogue supply	ADCs analogue supply (1.8V)
36	TDVDD18	digital supply	DACs digital supply (1.8V)
37	TAVDD33	analogue supply	DACs analogue supply (3.3V)
38	VREFAD	in/out	External capacitor for ADCs/DACs (>100nF)
39	XRESAD	in/out	External resistor for ADCs/DACs
40	RX_CLK_OUT	out cmos	Buffered RX_CLK (ADCs) clock, CMOS level	Can be used to align RXD[11:0] sampling clock in BB.
41	PLLCLKOUT	out cmos	Buffered PLLCLK (PLL reference) clock, CMOS level	Can be used as BB clock.
42	ATP	out	Analogue test point
43	TXVCCLPF33	analogue supply	TXLPF supply (3.3V)
44	TXOUT2N	out	TX output 2, negative
45	TXVCCMIX33	analogue supply	TXMIX supply (3.3V)
46	TXOUT2P	out	TX output 2, positive
47	TXPVDD33	esd supply	TX pads ESD supply (3.3V)
48	TXOUT1P	out	TX output 1, positive
49	TXVCCDRV33	analogue supply	TXVGA2 supply (3.3V)
50	TXOUT1N	out	TX output 1, negative
51	TXININ	in/out	TXDAC output / TXLPF input
52	TXINIP	in/out	TXDAC output / TXLPF input
53	UNUSED			Connect to ground
54	TXINQP	in/out	TXDAC output / TXLPF input
55	UNUSED			Connect to ground
56	TXINQN	in/out	TXDAC output / TXLPF input
57	TXVTUNE	in/out	TXPLL loop filter output
58	TXPVDDPLL33A	esd supply	TXPLL pads ESD supply (3.3V)
59	TXVCCVCO33	analogue supply	TXPLL 3.3V supply (3.3V)
60	TXVDDVCO18	analogue supply	TXPLL VCO supply (1.8V)
61	TXVCCPLL18	digital supply	TX PLL modules 1.8V supply (1.8V)
62	TXPVDDPLL33B	esd supply	TX PLL pads ESD supply (3.3V)
63	TXVCCCHP33	analogue supply	TX PLL charge pump supply (3.3V)
64	TXCPOUT	in/out	Transmit PLL loop filter input
65	TSTD_out1	out cmos	TX and RX PLLs digital test point
66	TXEN	in cmos	Transmitter enable, active high
67	SEN	in cmos	Serial port enable, active low
68	SDO	out cmos	Serial port data out	High Z when SEN=1
69	SDIO	in/out cmos	Serial port data in/out
70	SCLK	in cmos	Serial port clock, positive edge sensitive
71	PLLCLK	in, cmos or clipped sine	PLL reference clock input (23MHz - 41 MHz)	Minimum input level is 0.2Vpp. Both DC and AC coupling supported.
72	TRXVDDDSM18	digital supply	Delta sigma digital core supply (1.8V)
73	VSPI18	digital supply	SPI digital core supply (1.8V)
74	PVDDSPI33	esd supply	SPI pads and ESD Supply (3.3V)	Can be lowered down to 1.8V to support LV signalling
75	RESET	in cmos	Hardware reset, active low
76	RXEN	in cmos	Receiver enable, active high
77	TSTD_out2	out cmos	TX and RX PLLs digital test point
78	RXVCCCHP33	analogue supply	RXPLL charge pump supply (3.3V)
79	RXVCCLOB33	analogue supply	RXPLL LO buffer supply (3.3V)
80	RXCPOUT	in/out	RXPLL loop filter input
81	RXPVDDPLL33B	esd supply	RXPLL pads ESD supply (3.3V)
82	RXVCCVCO33	analogue supply	RXPLL 3.3V supply (3.3V)
83	RXVCCPLL18	digital supply	RXPLL 1.8V supply (1.8V)
84	RXVDDVCO18	analogue supply	RX PLL VCO supply (1.8V)
85	RXVCCPLL33	analogue supply	RX PLL 3.3V supply
86	RXPVDDPLL33A	esd supply	RXPLL pads ESD supply (3.3V)
87	RXVTUNE	in/out	RXPLL loop filter output
88	UNUSED			Connect to ground
89	XRES12k	in/out	External 12k 1% resistor to ground
90	RXVCCMIX33	analogue supply	RXMIX supply (3.3V)
91	OEXLNA1P	out	LNA1 output positive
92	IEXMIX1P	in	Mixer input 1 positive
93	UNUSED			Connect to ground
94	IEXMIX1N	in	Mixer input 1 negative
95	OEXLNA1N	out	LNA1 output negative
96	RXIN1P	in	RX1 (LNA1) input
97	RXIN1EP	in	LNA1 external emitter inductance	Connect to ground
98	RXIN1N	in	RX1 (LNA1) input
99	RXIN1EN	in	LNA1 external emitter inductance	Connect to ground
100	RXIN2P	in	RX2 (LNA2) input
101	RXVCCLNA33	analogue supply	RX LNA supply (3.3V)
102	RXIN2N	in	RX2 (LNA2) input
103	OEXLNA2P	out	LNA2 output positive
104	IEXMIX2P	in	Mixer input 2 positive
105	OEXLNA2N	out	LNA 2 output negative
106	IEXMIX2N	in	Mixer input 2 negative
107	RXPVDD33	esd supply	RX pads ESD supply (3.3V)
108	RXIN3P	in	RX3 (LNA3) input
109	RXVCCTIA33	analogue supply	RXTIA (RXVGA1) supply (3.3V)
110	RXIN3N	in	RX3 (LNA3) input
111	RXVCCLPF33	analogue supply	RXLPF supply (3.3V)
112	RXVCCVGA33	analogue supply	RXVGA2 supply (3.3V)
113	RXOUTQP	in/out	RXVGA2 output / RX ADC input
114	RXOUTQN	in/out	RXVGA2 output / RX ADC input
115	RXOUTIN	in/out	RX VGA2 output / RX ADC input
116	RXOUTIP	in/out	RX VGA2 output / RX ADC input
117	GLOBAL GND	GLOBAL GND	Package paddle ground

Typical Application

LMS6002D Typical Application Circuit, RF Part

A typical application circuit of LMS6002D is given above. Note that only the RF part is shown. It is recommended all unused pins to be grounded, digital test pins should be left open while RF pins should be connected as indicated. As shown, RF ports are matched for UMTS bands I and V while TXOUT2 and RXIN3 are broadband matched. Refer to “LMS6002D Reference Design and PCB Layout Recommendations” for more details.