ADC12040 datasheet(1/20 Pages) NSC

Part #	ADC12040

Description	12-Bit, 40 MSPS, 340 mW A/D Converter with Internal Sample-and-Hold

PDF	20 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

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ADC12040

12-Bit, 40 MSPS, 340 mW A/D Converter with Internal

Sample-and-Hold

General Description

The ADC12040 is a monolithic CMOS analog-to-digital con-

verter capable of converting analog input signals into 12-bit

digital words at 40 Megasamples per second (MSPS), mini-

mum. This converter uses a differential, pipeline architecture

with digital error correction and an on-chip sample-and-hold

circuit to minimize die size and power consumption while

providing excellent dynamic performance. Operating on a

single 5V power supply, this device consumes just 340 mW

at 40 MSPS, including the reference current. The Power

Down feature reduces power consumption to 40 mW.

The differential inputs provide a full scale input swing equal

to V

REF with the possibility of a single-ended input. Full use

of the differential input is recommended for optimum perfor-

mance. For ease of use, the buffered, high impedance,

single-ended reference input is converted on-chip to a differ-

ential reference for use by the processing circuitry. Output

data format is 12-bit offset binary.

This device is available in the 32-lead LQFP package and

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

+85˚C.

Features

n

Single supply operation

n

Internal sample-and-hold

n

Outputs 2.5V to 5V compatible

n

TTL/CMOS compatible input/outputs

n

Low power consumption

n

Power down mode

n

On-chip reference buffer

Key Specifications

n

Resolution

12 Bits

n

Conversion Rate

40 MSPS (min)

n

DNL

±0.4 LSB (typ)

n

INL

±0.7 LSB (typ)

n

SNR (f

IN = 10MHz)

69 dB (typ)

n

ENOB (f

IN = 10MHz)

11.2 bits (typ)

n

Data Latency

6 Clock Cycles

n

Supply Voltage

+5V ±5%

n

Power Consumption, 40 MHz

340 mW (typ)

Applications

n

Ultrasound and Imaging

n

Instrumentation

n

Cellular Base Stations/Communications Receivers

n

Sonar/Radar

n

xDSL

n

Wireless Local Loops/Cable Modems

n

HDTV/DTV

n

DSP Front Ends

Connection Diagram

20014801

June 2003

DS200148

www.national.com

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ADC12040 Datasheet(PDF) 1 Page - National Semiconductor (TI)

ADC12040 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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