AD9961/AD9963
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
AUX33V
AUXADCREF
RXQP
1
2
3
4
5
6
7
8
9
54 DLLFILT
53 DLL18V
52 DVDD18
51 DRVDD
50 NC
PIN 1
INDICATOR
RXQN
RXGND
RXBIAS
RX18V
RX33V
RX18VF
RXCML 10
RXGND 11
RXIN 12
RXIP 13
LDO_EN
49 NC
48 TXD0
47 TXD1
46 TXD2
45 TXD3
44 TXD4
43 TXD5
42 TXD6
41 TXD7
40 TXD8
39 TXD9
38 TXIQ/TXnRX
37 TXCLK
AD9961
(TOP VIEW)
14
RESET 15
SCLK 16
CS 17
SDIO 18
NOTES
1. EXPOSED PAD MUST BE SOLDERED TO PCB.
2. NC = NO CONNECT.
Figure 2. AD9961 Pin Configuration
Table 8. AD9961 Pin Function Descriptions
Pin No.
Mnemonic
Description
1
AUX33V
Analog Supply for the Auxiliary ADC and Auxiliary DACs (3.3 V 5%, 1.8 V 5% If Auxiliary ADC Is
Powered Down).
2
AUXADCREF
RXQP, RXQN
RXGND
Reference Output (Or Input) for Auxiliary ADC.
Differential ADC Q Inputs. The default full-scale input voltage range is 1.56 V p-p differential.
Receive Path Ground.
External Bias Resistor Connection. An optional 10 kΩ resistor can be connected between this pin and the
analog ground to improve the accuracy of the full-scale range of the Rx ADCs.
3, 4
5, 11
6
RXBIAS
7
8
RX18V
RX33V
Output of RX18V Voltage Regulator.
Input to RX18V and RX18VF Voltage Regulators (2.5 V to 3.3 V). If LDOs are not being used, short Pin 8 to
Pin 7.
9
10
RX18VF
RXCML
Output of RX18VF Voltage Regulator.
ADC Common-Mode Voltage Output.
12, 13
14
RXIN, RXIP
LDO_EN
Differential ADC I Inputs. The default full-scale input voltage range is 1.56 V p-p differential.
Control Pin for LDOs (GND = Disable all LDOs, Float = Enable DVDD18 LDO Only, DRVDD = Enable All
LDOs).
15
RESET
SCLK
CS
Reset. Active low to reset the configuration registers to default values and reset device.
16
17
Clock Input for Serial Port.
Active Low Chip Select.
18
19, 34
SDIO
DGND
Bidirectional Data Line for Serial Port.
Digital Core Ground.
20, 33, 51 DRVDD
Input/Output Pad Ring Supply Voltage (1.8 V to 3.3 V).
ADC Output Data in Full Duplex Mode. ADC output data and DAC input data in half-duplex mode.
Not Connected.
21 to 30
TRXD9 to TRXD0
31, 32,
49, 50
NC
35
TRXIQ
Output Signal Indicating from Which ADC the Output Data Is Sourced.
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