AD7895集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

AD7895属于集成电路（IC）的模数转换器（ADC）。由亚德诺半导体技术有限公司制造生产的AD7895模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。

GENERAL DESCRIPTION

The AD7895 is a fast 12-bit ADC that operates from a single +5 V supply and is housed in a small 8-pin mini-DIP and 8-pin SOIC. The part contains a 3.8 µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface.

Output data from the AD7895 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part.

In addition to the traditional dc accuracy specifications such as linearity and full-scale and offset errors, the AD7895 is specified for dynamic performance parameters, including harmonic distortion and signal-to-noise ratio.

The part accepts an analog input range of ±10 V (AD7895-10), ±2.5 V (AD7895-3), 0 V to 2.5 V (AD7895-2) and operates from a single +5 V supply, consuming only 20 mW max.

The AD7895 features a high sampling rate mode and, for low power applications, a proprietary automatic power-down mode where the part automatically goes into power down once conversion is complete and “wakes up” before the next conver sion cycle.

The part is available in a small, 8-pin, 0.3 wide, plastic dual-in-line package (mini-DIP) and in an 8-pin, small outline IC (SOIC).

FEATURES

Fast 12-Bit ADC with 3.8 ms Conversion Time

8-Pin Mini-DlP and SOIC

Single 5 V Supply Operation

High Speed, Easy-to-Use, Serial Interface

On-Chip Track/Hold Amplifier

Selection of Input Ranges

±10 V for AD7895-10

±2.5 V for AD7895-3

0 V to +2.5 V for AD7895-2

High Input Impedance

Low Power: 20 mW max

14-Bit Pin Compatible Upgrade (AD7894)