Mixed-Signal Transceiver. AFE7222 Datasheet

AFE7222 Transceiver. Datasheet pdf. Equivalent

Part AFE7222
Description Analog Front End Wideband Mixed-Signal Transceiver
Feature AFE7222 AFE7225 www.ti.com SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012 Analog Front End Wideban.
Manufacture etcTI
Datasheet
Download AFE7222 Datasheet



AFE7222
AFE7222
AFE7225
www.ti.com
SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012
Analog Front End Wideband Mixed-Signal Transceiver
Check for Samples: AFE7222, AFE7225
1 INTRODUCTION
1.1 FEATURES
1
• AFE7225
– Dual 12-Bit 250MSPS TX DACs
– Dual 12-Bit 125MSPS RX ADCs
• AFE7222
– Dual 12-Bit 130MSPS TX DACs
– Dual 12-Bit 65MSPS RX ADCs
• OPTIONS
– Dual 12-Bit Auxiliary DACs
– Dual Input 12-Bit Auxiliary ADC
– TX Path Interpolation by 2 or 4
– RX Path Decimation by 2
– 3.0V/1.8V Supplies, Low Power
– Fast Wakeup Modes for Half-Duplex
– Coarse or Fine Digital Mixer
– Quadrature Modulation Corrections
– Clock Input Divide/Multiply
– Serial LVDS or Interleaved Parallel CMOS
Interface
– 64-Pin QFN Package (9mm × 9mm)
1.2 APPLICATIONS
• Portable, Low Power Radio
• Wireless Infrastructure
• Point-to-Point Radio
• Pico-Cell BTS
1.3 DESCRIPTION
The AFE7225/7222 is an analog front end designed for full- or half-duplex radios. Over-sampling transmit
12-bit DACs provide output frequencies from baseband to Nyquist. Under-sampling receive 12-bit ADCs
allow analog inputs from baseband to ~230MHz. Most blocks within the AFE7225/7222 are independently
controlled for optimization of power consumption versus utilization. Two auxiliary control 12-bit DACs and
a dual input auxiliary monitoring 12-bit ADC are available via serial interface. Digital features include QMC
(quadrature modulation correction), interpolation, decimation, RMS/peak power meter and mixers with
independent NCOs for RX and TX path.
The AFE7225/7222 is available in a 64-pin 9x9mm QFN package (RGC). The AFE7225/7222 is built on
Texas Instrument’s low power analog CMOS process and is specified over the full industrial temperature
range (–40°C to 85°C).
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to
specifications per the terms of the Texas Instruments standard warranty. Production
processing does not necessarily include testing of all parameters.
Copyright © 2011–2012, Texas Instruments Incorporated



AFE7222
AFE7222
AFE7225
SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
1.4 DETAILED BLOCK DIAGRAM
INP_A_ADC
INN_A_ADC
12b
RX ADC A
INP_B_ADC
INN_B_ADC
VCM
CLKINP
CLKINN
BIASJ
ADC CLK
DAC CLK
12b
RX ADC B
Clock
Divide/Multiply
SYNC
IOUTP_A_DAC
IOUTN_A_DAC
IOUTP_B_DAC
IOUTN_B_DAC
AUXDAC_A
AUXDAC_B
12b
TX DAC A
12b
TX DAC B
12b Aux DAC
12b Aux DAC
SYNC
SYNC
SYNC
RX RMS /
Peak
Power Meter
SYNC
SYNC
NCO
SYNC
SYNC
NCO
SYNC
SYNC
SYNC
SYNC
Internal
Reference
SYNC
SYNC
AUXADC_A
AUXADC_B
2-1
MUX
12b Aux ADC
SPI Interface, Registers and Control
SYNC
Figure 1-1. Block Diagram of AFE7222/AFE7225
12-Bit ADC
Outputs
AVDD3_AUX = 3 V
AVDD3_DAC = 3 V
DVDD18_DAC = 1.8 V
AVDD18_ADC = 1.8 V
DVDD18 = 1.8 V
DVDD18_CLK = 1.8 V
Thermal Pad = Ground
12-Bit DAC
Inputs
SYNC
SEN
SCLK
SDATA
SDOUT
RESET
PDN
2 INTRODUCTION
Copyright © 2011–2012, Texas Instruments Incorporated
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