AD7715: 3 V或5 V、450 uA、16位Σ-Δ型ADC
AD7715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输入信号,并产生串行数字输出。它采用Σ-Δ转换技术,可实现最高16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输出更新速率进行调整。AD7715具有一个差分模拟输入和一个差分基准电压输入。它采用单电源（+3 V或+5 V）供电,可处理以下范围的单极性输入信号：0 mV至+20 mV、0 mV至+80 mV、0 V至+1.25 V和0 V to +2.5 V；还可处理以下范围的双极性输入信号：±20 mV、±80 mV、±1.25 V和±2.5 V。这些双极性范围都以差分模拟输入的负极输入作为参考电压。因此,AD7715能处理单通道系统所有的信号调节和转换。AD7715具有一个差分模拟输入和一个差分基准电压输入。它采用单电源（+3 V或+5 V）供电,可处理以下范围的单极性输入信号：0 mV至+20 mV、0 mV至+80 mV、0 V至+1.25 V和0 V 至 +2.5 V；还可处理以下范围的双极性输入信号：±20 mV、±80 mV、±1.25 V和±2.5 V。这些双极性范围都以差分模拟输入的负极输入作为参考电压。因此,AD7715能处理单通道系统所有的信号调节和转换。AD7715非常适合基于微控制器或DSP的智能系统应用。它有一个串行接口,可用于三线式模式。利用输入串行端口,可在软件中进行增益设置、信号极性和更新速率选择。该器件包含自校准和系统校准选项,可消除器件本身或系统中的增益和失调误差。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 uW（典型值）。该器件提供三种封装：16引脚、0.3英寸宽、塑料双列直插式封装（DIP）；16引脚、0.3英寸宽、小形集成封装（SOIC）；以及16引脚超薄紧缩小型封装（TSSOP）。
The AD7715 is a complete analog front end for low frequency measurement applications. The part can accept low level input signals directly from a transducer and outputs a serial digital word. It employs a sigma-delta conversion technique to realize up to 16 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 output update rate.
The AD7715 features a differential analog input as well as a differential reference input. It operates from a single supply (+3 V or +5 V). It can handle unipolar input signal ranges of 0 mV to +20 mV, 0 mV to +80 mV, 0 V to +1.25 V and 0 V to +2.5 V. It can also handle bipolar input signal ranges of ±20 mV, ±80 mV, ±1.25 V and ±2.5 V. These bipolar ranges are referenced to the negative input of the differential analog input. The AD7715 thus performs all signal conditioning and conversion for a single-channel system.The AD7715 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 update rate selection can be configured in software using the input serial port. The part contains self-calibration and system calibration options to eliminate gain and offset errors on the part itself or in the system.CMOS construction ensures very low power dissipation, and the power-down mode reduces the standby power consumption to 15 uW typical at 3 V operation. The part is available in a 16-pin, 0.3 inch-wide, plastic dual-in-line package (DIP), a 16-lead 0.3 inch-wide small outline (SOIC) package and in a tiny 16-lead Thin Shrink Small Outline Package (TSSOP).
AD7715 特点
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AD7715 技术指标
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AD7715 芯片订购指南
| 产品型号 | 封装 | 引脚 | 温度范围 | 包装和数量 | 报价*(100-499) | 报价*1000 pcs |
|---|---|---|---|---|---|---|
| AD7715ACHIPS-3 产品状态: 量产 | CHIPS OR DIE | - | 商业 | Tray, 49 | - | - |
| AD7715ACHIPS-5 产品状态: 量产 | CHIPS OR DIE | - | 商业 | Tray, 49 | - | $ 8.48 |
| AD7715AN-5 产品状态: 量产 | 16 ld PDIP | 16 | 工业 | Tube, 25 | $ 8.01 | $ 6.80 |
| AD7715ANZ-3 产品状态: 量产 | 16 ld PDIP | 16 | 工业 | Tube, 25 | $ 7.14 | $ 6.07 |
| AD7715ANZ-5 产品状态: 量产 | 16 ld PDIP | 16 | 工业 | Tube, 25 | $ 7.14 | $ 6.07 |
| AD7715AR-3 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 工业 | Tube, 47 | $ 7.78 | $ 6.60 |
| AD7715AR-5 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 工业 | Tube, 47 | $ 7.78 | $ 6.60 |
| AD7715AR-5REEL 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 工业 | Reel, 1000 | - | $ 6.60 |
| AD7715ARU-3REEL 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Reel, 2500 | - | $ 6.60 |
| AD7715ARU-3REEL7 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Reel, 1000 | - | $ 6.60 |
| AD7715ARU-5 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Tube, 96 | $ 8.17 | $ 6.93 |
| AD7715ARU-5REEL 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Reel, 2500 | - | $ 6.93 |
| AD7715ARU-5REEL7 产品状态: 最后订购时间 | 16 ld TSSOP | 16 | 工业 | Reel, 1000 | - | - |
| AD7715ARUZ-3 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Tube, 96 | $ 7.28 | $ 6.18 |
| AD7715ARUZ-3REEL7 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Reel, 1000 | - | $ 6.18 |
| AD7715ARUZ-5 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Tube, 96 | $ 6.93 | $ 5.89 |
| AD7715ARUZ-5REEL7 产品状态: 量产 | 16 ld TSSOP | 16 | 工业 | Reel, 1000 | - | $ 5.89 |
| AD7715ARZ-3 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 工业 | Tube, 47 | $ 6.93 | $ 5.89 |
| AD7715ARZ-3REEL 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 工业 | Reel, 1000 | - | $ 5.89 |
| AD7715ARZ-5 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 商业 | Tube, 47 | $ 6.93 | $ 5.89 |
| AD7715ARZ-5REEL 产品状态: 量产 | 16 ld SOIC - Wide | 16 | 商业 | Reel, 1000 | - | $ 5.89 |