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.
### Features and Benefits
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
