The AD7864 is a high speed, low power, four-channel simultaneous sampling 12-bit A/D converter that operates from a single +5 V supply. The part contains a 1.65us successive approximation ADC, four track/hold amplifiers, 2.5V reference, on chip clock oscillator, signal conditioning circuitry and a high speed parallel interface. The input signals on four channels are sampled simultaneously thus preserving the relative phase information of the signals on the four analog inputs. The part accepts analog input ranges of ±10 V, ±5V (AD7864-1), 0 to 2.5 V, 0 to 5 V for AD7864-2 and ±2.5 V (AD7864-3). Overvoltage protection on the analog inputs for the part allows the input voltage to go to ±20 V, +20V/-1V and +20 V/-5V respectively without damaging the parts or affecting a conversion in progress.
AD7864是一款高速、低功耗、4通道、12位同时采样模数转换器（ADC）,采用+5 V单电源供电。该器件内置一个1.65 微秒（us）逐次逼近型ADC、四个采样保持放大器、2.5 V基准电压源、片内时钟振荡器、信号调理电路和一个高速并行接口。4个通道上的输入信号同时进行采样,因而可保留4个模拟输入上的信号相对相位信息。该器件可接受的模拟输入范围为±10 V、±5V （AD7864-1）、0至2.5 V、0至5 V （AD7864-2）和±2.5 V （AD7864-3）。模拟输入均具有过压保护,允许输入电压分别达到±20 V、+20V/-1V和+20 V/-5V,而不会损坏器件或影响正在进行的转换
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7864ASZ-1 | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864ASZ-1REEL | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864ASZ-2 | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864ASZ-2REEL | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864ASZ-3 | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864ASZ-3REEL | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864BSZ-1 | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7864BSZ-1REEL | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| EVAL-AD7864-2CB | 量产 | 评估板 | - | 待定 |
| EVAL-AD7864-3CB | 量产 | 评估板 | - | 待定 |