AD7666ACPR datasheet(1/29 Pages) AD

Part #	AD7666ACPR

Description	16-Bit 500 kSPS PulSAR Unipolar ADC with Reference

PDF	29 Pages

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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16-Bit 500 kSPS PulSAR®

Unipolar ADC with Reference

AD7666

Rev. 0

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.

Specifications subject to change without notice. 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 owners.

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

FEATURES

2.5 V internal reference: typical drift 3 ppm/°C

Guaranteed max drift 15 ppm/°C

Throughput: 500 kSPS

INL: ±2.0 LSB max (±0.0038% of full scale)

16-bit resolution with no missing codes

S/(N+D): 88 dB min @ 20 kHz

THD: –96 dB max @ 20 kHz

Analog input voltage range: 0 V to 2.5 V

Both AC and DC specifications

No pipeline delay

Parallel and serial 5 V/3 V interface

SPI

®/QSPITM/MICROWIRETM/DSP compatible

Single 5 V supply operation

Power dissipation

66 mW typ, 132 µW @ 1 kSPS without REF

81 mW typ with REF

48-lead LQFP and 48-lead LFCSP packages

Pin-to-pin compatible with PulSAR ADCs

APPLICATIONS

Data acquisition

Medical instruments

Digital signal processing

Spectrum analysis

Instrumentation

Battery-powered systems

Process control

GENERAL DESCRIPTION

The AD7666 is a 16-bit, 500 kSPS, charge redistribution SAR

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

power supply. The part contains a high speed, 16-bit sampling

ADC, an internal conversion clock, internal reference, error

correction circuits, and both serial and parallel system inter-

face ports. The AD7666 is hardware factory-calibrated and

comprehensively tested to ensure ac parameters such as signal-

to-noise ratio (SNR) and total harmonic distortion (THD), in

addition to the more traditional dc parameters of gain, offset,

and linearity.

The AD7666 is available in a 48-lead LQFP and a tiny 48-lead

LFCSP, with operation specified from –40°C to +85°C.

FUNCTIONAL BLOCK DIAGRAM

SWITCHED

CAP DAC

16

CONTROL LOGIC AND

CALIBRATION CIRCUITRY

CLOCK

AD7666

DATA[15:0]

BUSY

RD

CS

SER/PAR

OB/2C

OGND

OVDD

DGND

DVDD

AVDD

AGND

REF REFGND

IN

INGND

PD

RESET

SERIAL

PORT

PARALLEL

INTERFACE

CNVST

REF

REFBUFIN

PDBUF

PDREF

BYTESWAP

Figure 1. Functional Block Diagram

Table 1. PulSAR Selection

Type/kSPS

100–250

500–570

800–

1000

Pseudo-

Differential

AD7651

AD7660/AD7661

AD7650/AD7652

AD7664/AD7666

AD7653

AD7667

True Bipolar

AD7663

AD7665

AD7671

True

Differential

AD7675

AD7676

AD7677

18-Bit

AD7678

AD7679

AD7674

Multichannel/

Simultaneous

AD7654

AD7655

PRODUCT HIGHLIGHTS

1.

Fast Throughput.

The AD7666 is a 500 kSPS, charge redistribution, 16-bit

SAR ADC with internal error correction circuitry.

2.

Superior INL.

The AD7666 has a maximum integral nonlinearity of

2.0 LSB with no missing 16-bit codes.

3.

Internal Reference.

The AD7666 has an internal reference with a typical

temperature drift of 3 ppm/°C.

4.

Single-Supply Operation.

The AD7666 operates from a single 5 V supply. Its power

dissipation decreases with throughput.

5.

Serial or Parallel Interface.

Versatile parallel or 2-wire serial interface arrangement is

compatible with both 3 V and 5 V logic.

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