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