Datasheet > ADS7881_14

ADS7881_14

更新时间： 2022-10-12 16:14:23

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
26页	335K
描述
4 MHz Sample Rate, 12-Bit Resolution High Speed Parallel Interface

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数据手册

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ADS7881_14 数据手册

ꢀ ꢁꢂ ꢃꢄ ꢄꢅ

SLAS400 − SEPTEMBER 2003

ꢅꢆ ꢇ ꢈꢉ ꢊꢋ ꢌꢇ ꢍ ꢂ ꢎꢂ

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FEATURES

APPLICATIONS

4 MHz Sample Rate, 12-Bit Resolution

Zero Latency

Unipolar, Pseudo Differential Input, Range:

− 0 V to 2.5 V

High Speed Parallel Interface

71 dB SNR and −88.5 dB THD at 1 MHz I/P

Power Dissipation 95 mW at 4 MSPS

Nap Mode (10 mW Power Dissipation)

Power Down (10 mW)

Optical Networking (DWDM, MEMS Based

Switching)

Spectrum Analyzers

High Speed Data Acquisition Systems

High Speed Close-Loop Systems

Telecommunication

Ultra-Sound Detection

Internal Reference

Internal Reference Buffer

48-Pin TQFP Package

DESCRIPTION

The ADS7881 is a 12-bit 4-MSPS A-to-D converter with

2.5-V internal reference. The device includes a capacitor

based SAR A/D converter with inherent sample and hold.

The device offers a 12-bit parallel interface with an

additional byte mode that provides easy interface with 8-bit

processors. The device has a pseudo-differential input

stage.

The −IN swing of 200 mV is useful to compensate for

ground voltage mismatch between the ADC and sensor

and also to cancel common-mode noise. With nap mode

enabled, the device operates at lower power when used at

lower conversion rates. The device is available in a 48-pin

TQFP package.

BYTE

SAR

Output

Latches

and

3-State

Drivers

+IN

−IN

CDAC

12/8-Bit Parallel

Data Output Bus

Comparator

CLOCK

REFIN

CONVST

Conversion

and

Control Logic

BUSY

2.5 V

REFOUT

Internal

Reference

PWD/RST

A_PWD

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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ꢎꢝ ꢜ ꢨꢣꢢ ꢠ ꢙꢜ ꢚ ꢥꢝ ꢜ ꢢ ꢤ ꢡ ꢡ ꢙꢚ ꢮ ꢨꢜ ꢤ ꢡ ꢚꢜꢠ ꢚꢤ ꢢꢤ ꢡꢡ ꢟꢝ ꢙꢧ ꢭ ꢙꢚꢢ ꢧꢣꢨ ꢤ ꢠꢤ ꢡꢠꢙ ꢚꢮ ꢜꢛ ꢟꢧ ꢧ ꢥꢟ ꢝ ꢟꢞ ꢤꢠꢤ ꢝ ꢡꢩ

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