Datasheet > ADS7891

ADS7891

更新时间： 2024-11-08 22:53:39

品牌	Logo	应用领域
BB		转换器
页数	文件大小	规格书
26页	326K
描述
14BIT 3 MSPS LOW POWER SAR ANALOG TO DIGITAL CONVERTER

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中文翻译

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数据手册

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ADS7891 数据手册

ꢀ ꢁꢂ ꢃꢄ ꢅꢆ

SLAS410 − DECEMBER 2003

ꢆꢇ ꢈ ꢉꢊ ꢋꢌ ꢍꢈ ꢎ ꢂ ꢏꢂ

ꢐ ꢑꢒ ꢏꢑꢒ ꢓꢔ ꢂꢀ ꢔ ꢀ ꢕꢀꢐ ꢑꢖ ꢈ ꢋꢑ ꢈ ꢁꢊ ꢖ ꢊꢋꢀꢐ ꢗꢑ ꢕ ꢘꢓ ꢔꢋꢓ ꢔ

FEATURES

APPLICATIONS

3 MHz Sample Rate, 14-Bit Resolution

Zero Latency

Unipolar, Pseudo Differential Input, Range:

− 0 V to 2.5 V

High Speed Parallel Interface

78 dB SNR and 88.5 dB THD at 3 MSPS

Power Dissipation 85 mW at 3 MSPS

Nap Mode (10 mW Power Dissipation)

Power Down (10 mW)

Internal Reference

Internal Reference Buffer

8-/14-Bit Bus Transfer

48-Pin TQFP Package

Optical Networking (DWDM, MEMS Based

Switching)

Spectrum Analyzers

High Speed Data Acquisition Systems

High Speed Close-Loop Systems

Telecommunication

Ultra-Sound Detection

DESCRIPTION

The ADS7891 is a 14-bit 3-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 14-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

14/8-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.

ꢏꢔ ꢑ ꢁꢙ ꢗ ꢋꢊ ꢑꢕ ꢁ ꢀꢋꢀ ꢚꢛ ꢜꢝ ꢞ ꢟꢠ ꢡꢚꢝꢛ ꢚꢢ ꢣꢤ ꢞ ꢞ ꢥꢛꢡ ꢠꢢ ꢝꢜ ꢦꢤꢧ ꢨꢚꢣ ꢠꢡꢚ ꢝꢛ ꢩꢠ ꢡꢥꢪ ꢏꢞ ꢝꢩꢤ ꢣꢡꢢ

ꢣ ꢝꢛ ꢜꢝꢞ ꢟ ꢡꢝ ꢢ ꢦꢥ ꢣ ꢚ ꢜꢚ ꢣ ꢠ ꢡꢚ ꢝꢛꢢ ꢦ ꢥꢞ ꢡꢫꢥ ꢡꢥ ꢞ ꢟꢢ ꢝꢜ ꢋꢥꢬ ꢠꢢ ꢊꢛꢢ ꢡꢞ ꢤꢟ ꢥꢛꢡ ꢢ ꢢꢡ ꢠꢛꢩ ꢠꢞ ꢩ ꢭ ꢠꢞ ꢞ ꢠ ꢛꢡꢮꢪ

ꢏꢞ ꢝ ꢩꢤꢣ ꢡ ꢚꢝ ꢛ ꢦꢞ ꢝ ꢣ ꢥ ꢢ ꢢ ꢚꢛ ꢯ ꢩꢝ ꢥ ꢢ ꢛꢝꢡ ꢛꢥ ꢣꢥ ꢢꢢ ꢠꢞ ꢚꢨ ꢮ ꢚꢛꢣ ꢨꢤꢩ ꢥ ꢡꢥ ꢢꢡꢚ ꢛꢯ ꢝꢜ ꢠꢨ ꢨ ꢦꢠ ꢞ ꢠꢟ ꢥꢡꢥ ꢞ ꢢꢪ

12 3 4 5 6 7...26

中文翻译

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与ADS7891相关器件

型号	品牌	获取价格	描述	数据表
ADS7891IPFBR	TI	获取价格	具有内部基准电压的 2.7V 至 5.25V 数字、5V 模拟、14 位 3MSPS 并行
ADS7891IPFBRG4	TI	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP48, GREEN, PLASTIC, QFP-48
ADS7891IPFBT	TI	获取价格	14-BIT, 3-MSPS LOW POWER SAR ANALOG-TO-DIGITAL CONVERTER
ADS7924	TI	获取价格	2.2V, 12-Bit, 4-Channel, microPOWER™ ANALOG-T
ADS7924_14	TI	获取价格	2.2V, 12-Bit, 4-Channel, microPOWERâ¢ ANALOG
ADS7924_15	TI	获取价格	4-Channel, MicroPOWER Analog-to-Digital Converter
ADS7924IRTER	TI	获取价格	2.2V, 12-Bit, 4-Channel, microPOWER™ ANALOG-T
ADS7924IRTET	TI	获取价格	2.2V, 12-Bit, 4-Channel, microPOWER™ ANALOG-T
ADS7945	TI	获取价格	14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital
ADS7945_14	TI	获取价格	14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital

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