AD7896BNZ:  2.7 V to 5.5 V, 12-Bit, 8 µs ADC in 8-Pin SO/DIP

The AD7896 is a fast, 12-bit ADC which operates from a single +2.7 V to 5.5 V supply and is housed in a small 8-pin mini-DIP and 8-pin SOIC. The part contains an 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 AD7896 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, 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 con-version is complete and "wakes up" before the next conversion cycle.

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

AD7896是一款快速、12位ADC,采用+2.7 V至5.5 V单电源供电,提供8引脚小型DIP和8引脚SOIC两种封装。该器件内置一个8微秒(µs)逐次逼近型模数转换器、一个片内采样保持放大器、一个片内时钟和一个高速串行接口。

AD7896通过一个高速串行接口端口输出数据,这个双线串行接口具有一个串行时钟输入和一个串行数据输出,通过外部串行时钟可访问该器件中的串行数据。

除线性度、满量程和失调误差等传统直流精度规格外,AD7896的动态性能参数也做了详细规定,包括谐波失真和信噪比。

该器件可接受的模拟输入范围为0 V至VDD,采用+2.7 V至+5.5 V单电源供电,典型功耗仅9 mW。VDD输入同时用作器件的基准电压,因而无需外部基准电压。

AD7896提供两种采样模式:一种是高采样速率模式;另一种是针对低功耗应用的专有自动省电模式,即一旦完成转换,器件便自动进入省电模式,并在下一个转换周期开始前“唤醒”。

该器件提供两种封装:8引脚、0.3英寸宽、小型塑料或密封双列直插式封装(小型DIP);以及8引脚小形集成封装(SOIC)。

AD7896BNZ 特性
AD7896BNZ 功能框图
AD7896BNZ 技术指标
Resolution (Bits) 12bit Interface Ser
T-Put Rate 100kSPS Ain Range Uni Vdd
# Chan 1 SNR (dB) 70dB
Supply V Single(+3),Single(+3.3),Single(+5) Pkg Type DIP,SOIC
Pwr Diss (max) 10.8mW -- --
AD7896 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7896AN 量产 8 ld PDIP 8 工业
AD7896ANZ 量产 8 ld PDIP 8 工业
AD7896AR 量产 8 ld SOIC 8 工业
AD7896AR-REEL 量产 8 ld SOIC 8 工业
AD7896ARZ 量产 8 ld SOIC 8 工业
AD7896ARZ-REEL 量产 8 ld SOIC 8 工业
AD7896ARZ-REEL7 量产 8 ld SOIC 8 商业
AD7896BN 量产 8 ld PDIP 8 工业
AD7896BNZ 量产 8 ld PDIP 8 工业
AD7896BR 量产 8 ld SOIC 8 工业
AD7896BR-REEL 量产 8 ld SOIC 8 工业
AD7896BRZ 量产 8 ld SOIC 8 工业
AD7896BRZ-REEL 量产 8 ld SOIC 8 工业
AD7896BRZ-REEL7 量产 8 ld SOIC 8 商业
AD7896JR 量产 8 ld SOIC 8 工业
AD7896JRZ 量产 8 ld SOIC 8 工业
AD7896JRZ-REEL 量产 8 ld SOIC 8 工业
AD7896SQ 量产 CERDIP GLASS SEAL 8 军用
EVAL-AD7896CBZ 量产 评估板 - 待定
AD7896BNZ 应用技术支持与电子电路设计开发资源下载
  1. AD7896 数据手册DataSheet下载 . pdf
  2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
  3. ADC模数转换器选型指南 . pdf