8-Bit, 40/80/100 MSPS

Dual A/D Converter

AD9288

Rev. C

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FEATURES

Dual 8-bit, 40 MSPS, 80 MSPS, and 100 MSPS ADC

Low power: 90 mW at 100 MSPS per channel

On-chip reference and track-and-hold

475 MHz analog bandwidth each channel

SNR = 47 dB @ 41 MHz

1 V p-p analog input range each channel

Single 3.0 V supply operation (2.7 V to 3.6 V)

Standby mode for single-channel operation

Twos complement or offset binary output mode

Output data alignment mode

Pin-compatible 10-bit upgrade available

APPLICATIONS

Battery-powered instruments

Hand-held scopemeters

Low cost digital oscilloscopes

I and Q communications

FUNCTIONAL BLOCK DIAGRAM

AD9288

T/H

REF

T/H

ADC

8

8

8

8

TIMING

TIMING

SELECT 1

SELECT 2

DATA FORMAT

SELECT

GND

ADC

Figure 1.

GENERAL DESCRIPTION

The AD9288 is a dual 8-bit monolithic sampling analog-to-

digital converter with on-chip track-and-hold circuits. It is

optimized for low cost, low power, small size, and ease of use.

The product operates at a 100 MSPS conversion rate with

outstanding dynamic performance over its full operating range.

Each channel can be operated independently.

The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power

supply and an Encode clock for full-performance operation. No

external reference or driver components are required for many

applications. The digital outputs are TTL/CMOS-compatible,

and a separate output power supply pin supports interfacing

with 3.3 V or 2.5 V logic.

The Encode input is TTL/CMOS-compatible, and the 8-bit

digital outputs can be operated from 3.0 V (2.5 V to 3.6 V)

supplies. User-selectable options offer a combination of standby

modes, digital data formats, and digital data timing schemes. In

standby mode, the digital outputs are driven to a high

impedance state.

Fabricated on an advanced CMOS process, the AD9288 is

available in a 48-lead surface-mount plastic package (7 mm ×

7 mm, 1.4 mm LQFP) specified over the industrial temperature

range (–40°C to +85°C). The AD9288 is pin-compatible with

the 10-bit AD9218, facilitating future system migrations.