AFE7222_15 Datasheet, PDF (2/106 Pages) Texas Instruments – Analog Front End Wideband Mixed-Signal Transceiver

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
SYNC
12b Aux DAC
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
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