Datasheet > AD7722ASZ

AD7722ASZ

更新时间： 2024-09-17 12:55:55

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	452K
描述
16-Bit, 195 kSPS CMOS

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数据手册
替代型号

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AD7722ASZ 数据手册

16-Bit, 195 kSPS

CMOS, ꢀ-ꢁ ADC

AD7722

FEATURES

FUNCTIONAL BLOCK DIAGRAM

16-Bit ꢀ-ꢁ ADC

DGND DV

AGND AV

REF1

64ꢂ Oversampling Ratio

Up to 220 kSPS Output Word Rate

Low-Pass, Linear Phase Digital Filter

Inherently Monotonic

AD7722

2.5V

REFERENCE

REF2

On-Chip 2.5 V Voltage Reference

Single-Supply 5 V

High Speed Parallel or Serial Interface

16-BIT A/D CONVERTER

ꢀ-ꢁ FIR

MODULATOR FILTER

(+)

(–)

CLOCK

CIRCUITRY

XTAL

CLKIN

P/S

CAL

UNI

RESET

SYNC

DB15

DB14

DB13

DVAL/RD

CFMT/DRDY

DB0

DB12

DB11

DB10

CONTROL

LOGIC

DB1

DB2

DB9/FSO

GENERAL DESCRIPTION

DB3/ DB4/ DB5/ DB6/ DB7/ DB8/

TSI DOE SFMT FSI SCO SDO

The AD7722 is a complete low power, 16-bit, Σ-∆ ADC. The

part operates from a 5 V supply and accepts a differential input

voltage range of 0 V to +2.5 V or 1.25 V centered around a

common-mode bias. The AD7722 provides 16-bit performance

for input bandwidths up to 90.625 kHz. The part provides data

at an output word rate of 195.3 kHz.

Conversion data is provided at the output register through a flex-

ible serial port or a parallel port. This offers 3-wire, high speed

interfacing to digital signal processors. The serial interface operates

in an internal clocking (master) mode, whereby an internal serial

data clock and framing pulse are device outputs. Additionally,

two AD7722s can be configured with the serial data outputs

connected together. Each converter alternately transmits its conver-

sion data on a shared serial data line.

The analog input is continuously sampled by an analog modula-

tor, eliminating the need for external sample-and-hold circuitry.

The modulator output is processed by two finite impulse response

(FIR) digital filters in series. The on-chip filtering reduces the

external antialias requirements to first order, in most cases. The

group delay for the filter is 215.5 µs, while the settling time for

a step input is 431 µs. The sample rate, filter corner frequency,

and output word rate are set by an external clock that is

nominally 12.5 MHz.

The part provides an accurate on-chip 2.5 V reference. A

reference input/output function is provided to allow either the

internal reference or an external system reference to be used as

the reference source for the part.

Use of a single bit DAC in the modulator guarantees excellent

linearity and dc accuracy. Endpoint accuracy is ensured on-chip

by calibration. This calibration procedure minimizes the zero-

scale and full-scale errors.

The AD7722 is available in a 44-lead MQFP package and is

specified over the industrial temperature range of –40°C to +85°C.

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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

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 owners.

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

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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AD7722ASZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7722AS	ADI	功能相似	16-Bit, 195 kSPS CMOS, Sigma-Delta ADC

与AD7722ASZ相关器件

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AD7723	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723_17	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723BS	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723BS-REEL	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723BSZ	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723BSZ1	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723BSZ-REEL	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7723BSZ-REEL1	ADI	获取价格	16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC
AD7724	ADI	获取价格	Dual CMOS Modulators
AD7724AST	ADI	获取价格	Dual CMOS Modulators

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