GENERAL DESCRIPTION

The AD7896 is a fast, 12-bit ADC that operates from a single 2.7 V to 5.5 V supply and is housed in small 8-lead PDIP and 8-lead SOIC packages. The part contains an 8 μs successive approximation ADC, an on-chip track-and-hold amplifier, an on-chip clock, and a high speed serial interface.

Output data from the AD7896 is provided via a high speed, serial interface port. This 2-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, full-scale, and offset errors, the AD7896 is also specified for dynamic performance parameters, including harmonic distortion and signal-to-noise ratio.

The part accepts an analog input range of 0 V to VDD and operates from a single 2.7 V to 5.5 V supply, consuming only 9 mW typical. The VDD input is also used as the reference for the part so that no external reference is required.

The AD7896 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 conver sion is complete and “wakes up” before the next conversion cycle.

The part is available in a small, 8-lead, 0.3 wide, plastic or hermetic dual-in-line package (PDIP) and in an 8-lead, small outline IC (SOIC).

FEATURES

100 kHz Throughput Rate

Fast 12-Bit Sampling ADC with 8 μs Conversion Time

8-Lead PDIP and SOIC

Single 2.7 V to 5.5 V Supply Operation

High Speed, Easy-to-Use Serial Interface

On-Chip Track-and-Hold Amplifier

Analog Input Range Is 0 V to Supply

High Input Impedance

Low Power: 9 mW Typ

AD7896BRZ-REEL7屬于集成電路（IC） > 模數(shù)轉(zhuǎn)換器（ADC）。亞德諾半導體技術(shù)有限公司制造生產(chǎn)的AD7896BRZ-REEL7模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號。一般來說，數(shù)字輸出是二進制補碼二進制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。