AD7865: 快速、低功耗、4通道、14位同时采样ADC
AD7865是一款快速、低功耗、4通道、14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2.5 微秒（µs）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、±5 V或±2.5 V。模拟输入均具有过压保护,允许输入电压达到±20 V,而不会损坏器件或影响正在进行的转换。
The AD7865 is a fast, low power, four-channel simultaneous sampling 14-bit A/D converter that operates from a single +5 V supply. The part contains a 2.5 µs successive approximation ADC, four track/hold amplifiers, 2.5 V 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, ±5 V or ±2.5 V. Overvoltage protection on the analog inputs for the part allows the input voltage to go to ±20 V without damaging the parts or affecting a conversion in progress.
AD7865 特点
- 快速（2.4 µs）、14位ADC
- 4个可同时采样的输入
- 4个采样保持放大器
- 采样保持采集时间：0.35 µs
- 每通道转换时间：2.4 µs
- 转换所用通道序列可进行HW/SW选择
- 单电源供电
- 低功耗：115 mW（典型值）
- 输入范围选择：
±10 V、±5 V和±2.5 V
0 V至5 V和0 V至2.5 V - 高速并行接口,可与3 V处理器进行接口
- 省电模式：15 µW（典型值）
- 模拟输入过压保护
- Fast (2.4 µs) 14-Bit ADC
- Four Simultaneously Sampled Inputs
- Four Track/Hold Amplifiers
- 0.35 µs Track/Hold Acquisition Time
- 2.4 µs Conversion Time per Channel
- HW/SW Select of Channel Sequence for Conversion
- Single Supply Operation
- Low Power, 115 mW Typ
- Selection of Input Ranges:
±10 V, ±5 V and ±2.5 V
0 V to 5 V and 0 V to 2.5 V - High Speed Parallel Interface Allows Interfacing to 3 V Processors
- Power Saving Mode, 15 µW Typ
- Overvoltage Protection on Analog Inputs
AD7865 技术指标
- Resolution (Bits): 14bit
- # Chan: 4
- Sample Rate: 350kSPS
- Interface: Par
- Analog Input Type: SE-Bip,SE-Uni
- Ain Range: Bip 10V,Bip 2.5V,Bip 5.0V,Uni 2.5V,Uni 5.0V
- ADC Architecture: SAR
- Pkg Type: QFP
AD7865 功能框图
AD7865 芯片订购指南
AD7865 应用技术支持与电子电路设计开发资源下载
- AD7865 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
