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AD7663

16-Bit, 250 kSPS CMOS ADC

Analog Devices 

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16-Bit, 250 kSPS CMOS ADC

AD7663

FEATURES

Throughput: 250 kSPS

INL: ؎3 LSB Max (؎0.0046% of Full Scale)

16-Bit Resolution with No Missing Codes

S/(N+D): 90 dB Typ @ 100 kHz

THD: –100 dB Typ @ 100 kHz

Analog Input Voltage Ranges

Bipolar: ؎10 V, ؎5 V, ؎2.5 V

Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V

Both AC and DC Specifications

No Pipeline Delay

Parallel (8/16 Bits) and Serial 5 V/3 V Interface

SPI®/QSPI™/MICROWIRE™/DSP Compatible

Single 5 V Supply Operation

Power Dissipation

35 mW Typical

15 ␮W @ 100 SPS

Power-Down Mode: 7 ␮W Max

Package: 48-Lead Quad Flatpack (LQFP)

Package: 48-Lead Chip Scale (LFCSP)

Pin-to-Pin Compatible with the AD7660/AD7664/AD7665

APPLICATIONS

Data Acquisition

Motor Control

Communication

Instrumentation

Spectrum Analysis

Medical Instruments

Process Control

GENERAL DESCRIPTION

The AD7663 is a 16-bit, 250 kSPS, charge redistribution SAR,

analog-to-digital converter that operates from a single 5 V power

supply. It contains a high speed 16-bit sampling ADC, a resistor

input scaler that allows various input ranges, an internal conver-

sion clock, error correction circuits, and both serial and parallel

system interface ports.

The AD7663 is hardware factory-calibrated and is comprehen-

sively tested to ensure such ac parameters as signal-to-noise ratio

(SNR) and total harmonic distortion (THD), in addition to the

more traditional dc parameters of gain, offset, and linearity.

It is fabricated using Analog Devices’ high performance, 0.6 micron

CMOS process and is available in a 48-lead LQFP and a tiny

48-lead LFCSP with operation specified from –40°C to +85°C.

REV. B

FUNCTIONAL BLOCK DIAGRAM

AVDD AGND REF REFGND

DVDD DGND

IND(4R)

INC(4R)

INB(2R)

INA(R)

INGND

PD

RESET

4R

AD7663

4R

2R

R

SWITCHED

CAP DAC

SERIAL

PORT

CLOCK

PARALLEL 16

INTERFACE

CONTROL LOGIC AND

CALIBRATION CIRCUITRY

CNVST

OVDD

OGND

SER/PAR

BUSY

D[15:0]

CS

RD

OB/2C

BYTESWAP

PulSAR Selection

Type/kSPS

Pseudo

Differential

True Bipolar

100–250

AD7660

AD7663

500–570

AD7650

AD7664

AD7665

True Differential

18-Bit

Simultaneous/

Multichannel

AD7675

AD7678

AD7676

AD7679

AD7654

800–1000

AD7671

AD7677

AD7674

AD7655

PRODUCT HIGHLIGHTS

1. Fast Throughput

The AD7663 is a 250 kSPS charge redistribution, 16-bit

SAR ADC with various bipolar and unipolar input ranges.

2. Single-Supply Operation

The AD7663 operates from a single 5 V supply and dissipates

only 35 mW typical. Its power dissipation decreases with

the throughput to, for instance, only 15 µW at a 100 SPS

throughput.

It consumes 7 µW maximum when in power-down.

3. Superior INL

The AD7663 has a maximum integral nonlinearity of 3 LSB

with no missing 16-bit code.

4. Serial or Parallel Interface

Versatile parallel (8 bits or 16 bits) or 2-wire serial interface

arrangement compatible with both 3 V or 5 V logic.

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 that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.

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