ADS7870 12 位 ADC、MUX、PGA 和内部参考数据采集系统

ADS7870
Resolution(Bits) 12
Sample Rate (max) 52kSPS
Architecture SAR
Power Consumption(Typ)(mW) 4.6
SINAD(dB) 72
DNL(Max)(+/-LSB) 0.5
INL(Max)(+/-LSB) 2
No Missing Codes(Bits) 12
No. of Supplies 1
Analog Voltage AV/DD(Min)(V) 2.7
Analog Voltage AV/DD(Max)(V) 5.25
Logic Voltage DV/DD(Min)(V) 2.7
Logic Voltage DV/DD(Max)(V) 5.25
Input Configuration Range Vref/PGA(1,2,4,5,8,10,16,20)
Reference Mode Int
Rating Catalog
Pin/Package 28SSOP
# Input Channels 8
Operating Temperature Range(°C) -40 to 85

The ADS7870 (US patents 6140872, 6060874) is a complete low-power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 12-bit successive approximation analog-to-digital (A/D) converter, and a precision voltage reference.

The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.

For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.

The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.

ADS7870 特性
ADS7870 芯片订购指南
器件 状态 温度 (oC) 价格(美元) 封装 | 引脚
ADS7870EA ACTIVE -40 to 85 4.60 | 1ku SSOP(DB) | 28
ADS7870EA/1K ACTIVE -40 to 85 4.15 | 1ku SSOP(DB) | 28
ADS7870EA/1KG4 ACTIVE -40 to 85 4.15 | 1ku SSOP(DB) | 28
ADS7870EAG4 ACTIVE -40 to 85 4.60 | 1ku SSOP(DB) | 28
ADS7870 应用技术支持与电子电路设计开发资源下载
  1. ADS7870 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器仪ADC 模数转换器产品选型与价格 . xls