ADS7871中文资料具有 ADC、MUX、PGA 和内部基准的 14 位 48KSPS DAS数据手册TI规格书

描述 Description

The ADS7871 (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, 14-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.
The ADS7871 contains an internal reference, which is trimmed for high initial accuracy and stability vs temperature. Drift is typically 10 ppm/°C. An external reference can be used in situations where multiple ADS7871s share a common reference.
The serial interface allows the use of SPI™, QSPI™, Microwire™, and 8051-family protocols, without glue logic.

特性 Features

• PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
• 1.15-V, 2.048-V, or 2.5-V Internal Reference
• Throughput Rate: 48 kSamples/sec
• Programmable Output 2s Complement/Binary
• 4-Bit Digital I/O Via Serial Interface
• SSOP-28 Package
• Low-Power Instrumentation
• Smart Sensor Applications

简介

ADS7871属于集成电路（IC）的ADC/DAC-特殊用途。由TI制造生产的ADS7871ADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。