ADC10040

10-Bit, 40 MSPS, 3V, 55.5 mW A/D Converter

General Description

The ADC10040 is a monolithic CMOS analog-to-digital con-

verter capable of converting analog input signals into 10-bit

digital words at 40 Megasamples per second (MSPS). This

converter uses a differential, pipeline architecture with digital

error correction and an on-chip sample-and-hold circuit to

provide a complete conversion solution, and to minimize

power consumption, while providing excellent dynamic per-

formance. A unique sample-and-hold stage yields a full-

power bandwidth of 400 MHz. Operating on a single 3.0V

power supply, this device consumes just 55.5 mW at

40 MSPS, including the reference current. The Standby

feature reduces power consumption to just 13.5 mW.

The differential inputs provide a full scale selectable input

swing of 2.0 V

single-ended input. Full use of the differential input is recom-

mended for optimum performance. An internal +1.2V preci-

sion bandgap reference is used to set the ADC full-scale

range, and also allows the user to supply a buffered refer-

enced voltage for those applications requiring increased ac-

curacy. The output data format is 10-bit offset binary, or two’s

complement.

This device is available in the 28-lead TSSOP package and

will operate over the industrial temperature range of −40˚C to

+85˚C.

Features

n

Single +3.0V operation

n

Selectable 2.0 V

swing

n

400 MHz −3 dB input bandwidth

n

Low power consumption

n

Standby mode

n

On-chip reference and sample-and-hold amplifier

n

Offset binary or two’s complement data format

n

Separate adjustable output driver supply to

accommodate 2.5V and 3.3V logic families

n

28-pin TSSOP package

Key Specifications

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Resolution

10 Bits

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Conversion Rate

40 MSPS

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Full Power Bandwidth

400 MHz

n

DNL

n

SNR (f

59.6 dB (typ)

n

SFDR (f

−80 dB (typ)

n

Data Latency

6 Clock Cycles

n

Supply Voltage

+3.0V

n

Power Consumption, 40 MHz

55.5 mW

Applications

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Ultrasound and Imaging

n

Instrumentation

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Cellular Based Stations/Communications Receivers

n

Sonar/Radar

n

xDSL

n

Wireless Local Loops

n

Data Acquisition Systems

n

DSP Front Ends

Connection Diagram

20077801

November 2004

© 2004 National Semiconductor Corporation

DS200778

www.national.com