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AD9057

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REV. D

8-Bit 40 MSPS/60 MSPS/80 MSPS

A/D Converter

FUNCTIONAL BLOCK DIAGRAM

ADC

T/H

8

D7–D0

ENCODE

AIN

VREF OUT

BIAS OUT

PWRDN

AD9057

VREF IN

2.5V

1k

GND

PRODUCT DESCRIPTION

The AD9057 is an 8-bit monolithic analog-to-digital converter

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

With 40 MSPS, 60 MSPS, or 80 MSPS encode rate capability

and full-power analog bandwidth of 120 MHz, the component is

ideal for applications requiring excellent dynamic performance.

To minimize system cost and power dissipation, the AD9057

includes an internal 2.5 V reference and a track-and-hold (T/H)

circuit. The user must provide only a 5 V power supply and an

encode clock. No external reference or driver components are

required for many applications.

The AD9057’s encode input is TTL/CMOS compatible, and the

8-bit digital outputs can be operated from 5 V or 3 V supplies. A

power-down function may be exercised to bring total consumption

to <10 mW. In power-down mode, the digital outputs are driven

to a high impedance state.

Fabricated on an advanced BiCMOS process, the AD9057 is

available in a space-saving 20-lead shrink small outline package

(20-lead SSOP) and is specified over the industrial temperature

range (–40

∞C to +85∞C).

Customers desiring multichannel digitization may consider the

AD9059, a dual 8-bit, 60 MSPS monolithic based on the

AD9057 ADC core. The AD9059 is available in a 28-lead sur-

face-mount plastic package (28-lead SSOP) and is specified over

the industrial temperature range.

FEATURES

8-Bit, Low Power ADC: 200 mW Typical

120 MHz Analog Bandwidth

On-Chip 2.5 V Reference and Track-and-Hold

1 V p-p Analog Input Range

Single 5 V Supply Operation

5 V or 3 V Logic Interface

Power-Down Mode: <10 mW

3 Performance Grades (40 MSPS, 60 MSPS, 80 MSPS)

APPLICATIONS

Digital Communications (QAM Demodulators)

RGB and YC/Composite Video Processing

Digital Data Storage Read Channels

Medical Imaging

Digital Instrumentation