ADS7947

更新时间： 2024-11-09 06:36:27

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
38页	818K
描述
12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-Digital Converters

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ADS7947 数据手册

ADS7947

ADS7948

ADS7949

www.ti.com

SLAS708 –SEPTEMBER 2010

12/10/8-Bit, 2MSPS, Dual-Channel, Unipolar, Pseudo-Differential, Ultralow-Power

SAR Analog-to-Digital Converters

Check for Samples: ADS7947 , ADS7948, ADS7949

FEATURES

DESCRIPTION

•

Sample Rate: 2MSPS

The ADS7947/8/9 are 12-bit, 10-bit, and 8-bit 2MSPS

analog-to-digital converters (ADCs), respectively.

Devices operate at 2MSPS sample rate with a

standard 16 clock data frame. In addition, it is

possible to operate the ADS7947 (12-bit) at

2.1MSPS, the ADS7948 (10-bit) at 2.57MSPS, and

the ADS7949 (8-bit) at 3MSPS with a short data

frame optimized for the number of clocks sufficient for

conversion with no drop in performance. The devices

feature both outstanding dc precision and excellent

dynamic performance, this family of pin-compatible

devices includes a two-channel input multiplexer and

a low-power successive approximation register (SAR)

ADC with an inherent sample-and-hold (S/H) input

stage.

•

Pin-Compatible Family: 12/10/8-Bit

Outstanding Performance:

–

No Missing Codes

INL: 1LSB (max)

SNR: 72dB (min)

•

Low Power:

–

7.5mW at 2MSPS Operation

Auto Power-Down at Lower Speeds:

–

3.8mW at 500kSPS

0.8mW at 100kSPS

0.16mW at 20kSPS

•

Wide Supply Range:

The ADS7947/8/9 support a wide analog supply

range that allows the full-scale input range to extend

to 5V. A simple SPI™, with a digital supply that can

operate as low as 1.65V, allows for easy interfacing

to a wide variety of digital controllers. Automatic

power-down can be enabled when operating at

slower speeds to dramatically reduce power

consumption.

–

Analog: 2.7V to 5.5V

Digital: 1.65V to AVDD

•

Simple Serial Interface (SPI)

Fully Specified from –40°C to +125°C

Tiny Footprint: 3mm × 3mm QFN

Offered in a tiny 3mm × 3mm QFN package, the

ADS7947/8/9 are fully specified over the extended

temperature range of –40°C to +125°C and are

APPLICATIONS

•

Communication Systems

Optical Networking

Medical Instrumentation

Battery-Powered Equipment

Data Acquisition Systems

suitable for

a wide variety of data acquisition

applications where high performance, low power, and

small size are key.

AVDD

REF

REFGND

DVDD

PDEN

AIN0P

AIN0N

SAR

ADC

MUX

S/H

SPI

SCLK

SDO

AIN1P

AIN1N

CH SEL

GND

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.

SPI is a trademark of Motorola.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...38

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与ADS7947相关器件

型号	品牌	获取价格	描述	数据表
ADS7947_14	TI	获取价格	12/10/8-Bit, 2MSPS, Dual-Channel, Unipolar, Pseudo-Differential, Ultralow-Power SAR Analog
ADS7947SRTER	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7947SRTET	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7948	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7948SRTER	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7948SRTET	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7949	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7949SRTER	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7949SRTET	TI	获取价格	12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-
ADS7950	TI	获取价格	12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs

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