ADS7947 - 12 位、2 MSPS、双通道、伪差动 uPower 串行 SAR ADC

ADS7947是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS7947是12 位、2 MSPS、双通道、伪差动 uPower 串行 SAR ADC，本站介绍了ADS7947的封装应用图解、特点和优点、功能等，并给出了与ADS7947相关的TI元器件型号供参考。

ADS7947 - 12 位、2 MSPS、双通道、伪差动 uPower 串行 SAR ADC - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

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.

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.

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 suitable for a wide variety of data acquisition applications where high performance, low power, and small size are key.

产品特性

Sample Rate: 2MSPS
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:
- 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
APPLICATIONS
- Communication Systems
- Optical Networking
- Medical Instrumentation
- Battery-Powered Equipment
- Data Acquisition Systems

SPI is a trademark of Motorola. All other trademarks are the property of their respective owners.

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