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
- 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
- 吞吐量：100 kHz
- 快速12位采样ADC,转换时间为8微秒
- 8引脚PDIP和SOIC封装
- 2.7 V至5.5 V单电源供电
- 高速、易用的串行接口
- 片内采样保持放大器
- 模拟输入范围：0 V至电源电压
- 高输入阻抗
- 低功耗：9 mW（典型值）
AD7896BNZ 功能框图
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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 | -- | -- |
| 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 |
- 民用温度范围：0 ºC～＋70 ºC
- 军用温度范围：－55ºC ～＋125ºC
- 工业用温度范围：不同型号的产品的温度范围可能不同。
- 汽车工作温度范围：-40 ℃～ +125 ℃
AD7896BNZ 应用技术支持与电子电路设计开发资源下载
- AD7896 数据手册DataSheet下载 . pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf
