AD7714ARSZ-3:  CMOS、3V或5V、500 µA、24位Σ-Δ型信号调理ADC

AD7714是一款适合低频测量应用的完整模拟前端,可直接接受来自传感器的低电平信号,并产生串行数字输出。它采用Σ-Δ转换技术,可实现最高24位无失码性能。输入信号加在一个以模拟调制器为基础的专有可编程增益前端。调制器输出由片内数字滤波器处理。此数字滤波器的第一个陷波可通过片内控制寄存器进行编程,以便对滤波器截止和建立时间进行调整。

该器件具有三个差分模拟输入(也可以配置为五个伪差分模拟输入)和一个差分基准电压输入。因此,AD7714能处理最多由5个通道组成系统的所有信号调节和转换。最近在现有产品中已加入一个新的Y级。与A级相比,这一新级别扩展了工作温度范围,在SCLK和DIN上提供施密特触发器输入,提供更严格的线性度规格和更低的功耗,并采用更小的封装。

AD7714非常适合基于微控制器或DSP智能系统应用。它有一个串行接口,可用于三线式模式。利用串行端口,可在软件中进行增益设置、信号极性选择和通道选择。AD7714提供了自校准、系统校准和后台校准选项,同时允许用户读取和写入片内校准寄存器。

CMOS构造可确保获得极低的功耗,省电模式则将采用3 V电源时的待机功耗降至15 µW(典型值)。A级的最低工作电压为3 V,Y级则为2.7 V。A级提供三种封装:24引脚、0.3英寸宽、塑料双列直插式封装(DIP);24引脚小形集成封装(SOIC);以及28引脚紧缩小型封装(SSOP)。新的Y级也提供三种封装:24引脚、0.3英寸宽、塑料双列直插式封装(DIP);24引脚小形集成封装(SOIC);以及24引脚超薄紧缩小型封装(TSSOP)。

The AD7714 is a complete analog front end for low-frequency measurement applications. The device accepts low level signals directly from a transducer and outputs a serial digital word. It employs a sigma-delta conversion technique to realize up to 24 bits of no missing codes performance. The input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register allowing adjustment of the filter cutoff and settling time.

The part features three differential analog inputs (which can also be configured as five pseudo-differential analog inputs) as well as a differential reference input. The AD7714 thus performs all signal conditioning and conversion for a system consisting of up to five channels. A new Y grade has recently been added to the existing range. Compared to the A grades this new grade has an extended operating temperature range, schmitt trigger inputs on SCLK and DIN, tighter linearity specifications, lower power consumption and is available in a smaller package.

The AD7714 is ideal for use in smart microcontroller- or DSP-based systems. It features a serial interface that can be configured for three-wire operation. Gain settings, signal polarity and channel selection can be configured in software using the serial port. The AD7714 provides self-calibration, system calibration and background calibration options and also allows the user to read and write the on-chip calibration registers.

CMOS construction ensures very low power dissipation, and the power-down mode reduces the standby power consumption to 15 µW typical at 3 V. Minimum operating voltage for the A grades is 3 V and 2.7 V for the Y grades. The A grades are available in a 24-pin, 0.3 inch-wide, plastic dual-in-line package (DIP); a 24 lead small outline (SOIC) package and a 28-lead shrink small outline package (SSOP). The new Y grade is available in a 24-pin, 0.3 inch-wide, plastic dual-in-line package (DIP); a 24 lead small outline (SOIC) package and a 24-lead Thin Shrink Small Outline Package (TSSOP).

AD7714ARSZ-3 特点
AD7714ARSZ-3 功能框图

AD7714 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7714ACHIPS-3 量产 CHIPS OR DIE - 工业
AD7714ACHIPS-5 量产 CHIPS OR DIE - 工业
AD7714AN-3 量产 24 ld PDIP 24 工业
AD7714AN-5 量产 24 ld PDIP 24 工业
AD7714ANZ-3 量产 24 ld PDIP 24 工业
AD7714ANZ-5 量产 24 ld PDIP 24 工业
AD7714AR-3 量产 24 ld SOIC - Wide 24 工业
AD7714AR-3REEL 量产 24 ld SOIC - Wide 24 工业
AD7714AR-5 量产 24 ld SOIC - Wide 24 工业
AD7714AR-5REEL 量产 24 ld SOIC - Wide 24 工业
AD7714ARS-3 量产 28 ld SSOP 28 工业
AD7714ARS-3REEL 量产 28 ld SSOP 28 工业
AD7714ARS-5 量产 28 ld SSOP 28 工业
AD7714ARS-5REEL 量产 28 ld SSOP 28 工业
AD7714ARSZ-3 量产 28 ld SSOP 28 工业
AD7714ARSZ-3REEL 量产 28 ld SSOP 28 工业
AD7714ARSZ-5 量产 28 ld SSOP 28 工业
AD7714ARSZ-5REEL 量产 28 ld SSOP 28 工业
AD7714ARZ-3 量产 24 ld SOIC - Wide 24 工业
AD7714ARZ-3REEL 量产 24 ld SOIC - Wide 24 工业
AD7714ARZ-5 量产 24 ld SOIC - Wide 24 工业
AD7714ARZ-5REEL 量产 24 ld SOIC - Wide 24 工业
AD7714YN 量产 24 ld PDIP 24 汽车级
AD7714YNZ 量产 24 ld PDIP 24 汽车级
AD7714YR 量产 24 ld SOIC - Wide 24 汽车级
AD7714YR-REEL7 量产 24 ld SOIC - Wide 24 汽车级
AD7714YRU 量产 24 ld TSSOP 24 汽车级
AD7714YRU-REEL 量产 24 ld TSSOP 24 汽车级
AD7714YRU-REEL7 量产 24 ld TSSOP 24 汽车级
AD7714YRUZ 量产 24 ld TSSOP 24 工业
AD7714YRUZ-REEL 量产 24 ld TSSOP 24 工业
AD7714YRUZ-REEL7 量产 24 ld TSSOP 24 工业
AD7714YRZ 量产 24 ld SOIC - Wide 24 汽车级
AD7714YRZ-REEL 量产 24 ld SOIC - Wide 24 汽车级
AD7714YRZ-REEL7 量产 24 ld SOIC - Wide 24 汽车级
EVAL-AD7714-3EBZ 量产 评估板 - 商业
AD7714ARSZ-3 应用技术支持与电子电路设计开发资源下载
  1. AD7714 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