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10-Bit, 40 MSPS/60 MSPS A/D Converter AD9050 FUNCTIONAL BLOCK DIAGRAM

FEATURES Low Power: 315 mW @ 40 MSPS, 345 mW @ 60 MSPS On-Chip T/H, Reference Single +5 V Power Supply Operation Selectable 5 V or 3 V Logic I/O SNR: 53 dB Minimum at 10 MHz w/40 MSPS APPLICATIONS Medical Imaging Instrumentation Digital Communications Professional Video

+5V

GND

+5V

AD9050 AINB

REFERENCE CKTS

T/H

ADC

AIN SUM AMP

DAC

ADC

TIMING

ENCODE

PRODUCT DESCRIPTION

The AD9050 is a complete 10-bit monolithic sampling analogto-digital converter (ADC) with an onboard track-and-hold and reference. The unit is designed for low cost, high performance applications and requires only +5 V and an encode clock to achieve 40 MSPS or 60 MSPS sample rates with 10-bit resolution.

10

DECODE LOGIC

+5V

4

3 AIN (+3.3V ± 0.512V)

10

2, 8, 11, 20, 22

0.1µF +5V

5

The encode clock is TTL compatible and the digital outputs are CMOS; both can operate with 5 V/3 V logic, selected by the user. The two-step architecture used in the AD9050 is optimized to provide the best dynamic performance available while maintaining low power consumption.

10 BITS

AD9050

0.1µF

(2)

74AC574

6 0.1µF 9 13

1, 7, 12, 21, 23

ENCODE

A 2.5 V reference is included onboard, or the user can provide an external reference voltage for gain control or matching of multiple devices. Fabricated on an advanced BiCMOS process, the AD9050 is packaged in space saving surface mount packages (SOIC, SSOP) and is specified over the industrial (–40°C to +85°C) temperature range. The 60 MSPS version (AD9050BRS-60) is only available in the SSOP package.

Figure 1. Typical Connections

REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997


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