GENERAL DESCRIPTION

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 2.4 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, ±2.5 V, 0 V to 2.5 V and 0 V to 5 V.

FEATURES

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

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 Which Also Allows

Interfacing to 3 V Processors

Low Power, 115 mW Typ

Power Saving Mode, 15 μW Typ

Overvoltage Protection on Analog Inputs

APPLICATIONS

AC Motor Control

Uninterruptible Power Supplies

Industrial Power Meters/Monitors

Data Acquisition Systems

Communications

AD7865ASZ屬于集成電路（IC） > 模數(shù)轉換器（ADC）。亞德諾半導體技術有限公司制造生產的AD7865ASZ模數(shù)轉換器（ADC）模數(shù)轉換器（ADC、A/D 或 A 轉 D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉換為數(shù)字信號。一般來說，數(shù)字輸出是二進制補碼二進制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉換器數(shù)和架構（例如自適應增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。