TI公司的16位高速采样模数转换器(ADC)ADS8317的电源电压从2.7V到5.5V,在全速工作时仅需要很少的电流,而在低速工作时,能使高速器件绝大部分时间处于关断模式,从而使在10kHz数据速率时的平均功耗小于0.2mW.器件广泛应用在以电池为能源的系统,远程数据采集,单独的数据采集,工业控制,机器人以及震动分析和多通道系统的同时采样.本文介绍了ADS8317的主要性能,方框图,应用范围和采集系统案例.

TI 16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling ADC
The ADS8317 is a 16-bit, sampling, analog-to-digital (A/D) converter specified for a supply voltage range from 2.7V to 5.5V. It requires very little power, even when operating at the full data rate. At lower data rates, the high speed of the device enables it to spend most of its time in the power-down mode. For example, the average power dissipation is less than 0.2mW at a 10kHz data rate.

The ADS8317 offers excellent linearity and very low noise and distortion. It also features a synchronous serial (SPI/SSI-compatible) interface and a differential input. The reference voltage can be set to any level within the range of 0.1V to VDD/2.
Low power and small size make the ADS8317 ideal for portable and battery-operated systems. It is also an excellent fit for remote data-acquisition modules, simultaneous multichannel systems, and isolated data acquisition. The ADS8317 is available in MSOP-8 and SON-8 packages. The SON package size is the same as a 3x3 QFN package.



FEATURES
2 16 Bits No Missing Codes (Full-Supply Range, High or Low Grade)
Very Low Noise: 5LSBPP
Excellent Linearity:
±0.8LSB typ, ±1.5LSB max INL
+0.7LSB typ, +1.25LSB max DNL
±1mV max Offset
±16LSB typ Gain Error
microPower:
10mW at 5V, 250kHz
4mW at 2.7V, 200kHz
2mW at 2.7V, 100kHz
0.2mW at 2.7V, 10kHz
MSOP-8 Package(SON-8 package available Q1, 2008; package size same as 3x3 QFN)
Pin-Compatible with the ADS8321
Serial (SPI™/SSI) Interface

APPLICATIONS
Battery-Operated Systems
Remote Data Acquisition
Isolated Data Acquisition
Simultaneous Sampling, Multichannel Systems
Industrial Controls
Robotics
Vibration Analysis



图1.器件方框图.



图2.ADS8317基本的数据采集系统案例.

详情请见:

http://focus.ti.com/lit/ds/symlink/ads8317.pdf

来源：中电网