ADS7871IDB集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

ADS7871IDB属于集成电路（IC）的ADC/DAC-特殊用途。由美国德州仪器公司制造生产的ADS7871IDBADC/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。

FEATURES

PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V

Programmable Input (Up to 4-Channel

Differential/Up to 8-Channel Single-Ended or

Some Combination)

1.15-V, 2.048-V, or 2.5-V Internal Reference

SPI/DSP Compatible Serial Interface

(≤ 20 MHz)

Throughput Rate: 48 kSamples/sec

Error Overload Indicator

Programmable Output 2s Complement/Binary

2.7-V to 5.5-V Single Supply Operation

4-Bit Digital I/O Via Serial Interface

Pin-Compatible With ADS7870

SSOP-28 Package

APPLICATIONS

Portable Battery-Powered Systems

Low-Power Instrumentation

Low-Power Control Systems

Smart Sensor Applications

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-todigital

(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.