ANALOG DEVICES AD9961 Service Manual

10-/12-Bit,

FEATURES

Dual 10-bit/12-bit, 100 MSPS ADC

SNR = 67 dB, f

Dual 10-bit/12-bit, 170 MSPS DAC

ACLR = 74 dBc 5 channels of analog auxiliary input/output Low power, <425 mW at maximum sample rates Supports full and half-duplex data interfaces Small 72-lead LFCSP lead-free package

APPLICATIONS

Wireless infrastructure

Picocell, femtocell basestations Medical instrumentation

Ultrasound AFE Portable instrumentation

Signal generators, signal analyzers

GENERAL DESCRIPTION

The AD9961/AD9963 are pin-compatible, 10-/12-bit, low power MxFE® converters that provide two ADC channels with sample rates of 100 MSPS and two DAC channels with sample rates to 170 MSPS. These converters are optimized for transmit and receive signal paths of communication systems requiring low power and low cost. The digital interfaces provide flexible clocking options. The transmit is configurable for 1×, 2×, 4×, and 8× interpolation. The receive path has a bypassable 2× decimating low-pass filter.

The AD9961 and AD9963 have five auxiliary analog channels. Three are inputs to a 12-bit ADC. Two of these inputs can be configured as outputs by enabling 10-bit DACs. The other two channels are dedicated outputs from two independent 12-bit DACs.

The high level of integrated functionality, small size, and low power dissipation of the AD9961/AD9963 make them wellsuited for portable and low power applications.

= 30.1 MHz

Low Power, Broadband MxFE

AD9961/AD9963

FUNCTIONAL BLOCK DIAGRAM

CLOCK

AND BIAS

REFIO

TXCML

Figure 1.

TEMPERATURE

SENSOR

AUX ADC

AUX DAC

INTERNAL

LPF

1/2/4/8

LPF

1/2/4/8

LPF 1/2

RXCML

RXBIAS

LDO

VREGs

MUX

12-BIT

DAC

12-BIT

DAC

12-BIT

ADC

12-BIT

ADC

AUX DAC

LDO_EN

AUXIN1

AUXIO2

AUXIO3

TXIP TXIN

TXQP TXQN

RXIP RXIN

RXQP RXQN

DAC12A

DAC12B

AD9961/AD9963

DLLFILT

CLKP

CLKN

TXCLK

TXIQ/TXnRX

TXD[11:0]

TRXCLK

TRXIQ

TRXD[11:0]

RESET

SDIO

SCLK

SERIAL

PORT

LOGIC

DLL AND

DISTRIBUTION

DATA

ASSEMBLER

REFERENCES

AUXADCREF

PRODUCT HIGHLIGHTS

1. High Performance with Low Power Consumption.

The DACs operate on a single 1.8 V to 3.3 V supply. Transmit path power consumption is <100 mW at 170 MSPS. Receive path power consumption is <350 mW at 100 MSPS from 1.8 V supply. Sleep and power-down modes are provided for low power idle periods.

2. High Integration.

The dual transmit and dual receive data converters, five channels of auxiliary data conversion and clock generation offer complete solutions for many modem designs.

3. Flexible Digital Interface.

The interface mates seamlessly to most digital baseband processors.

08801-001

Rev. 0

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