AD7865

四通道，同步采样，快速， 14位ADC Four-Channel, Simultaneous Sampling, Fast, 14-Bit ADC

Product Details

The 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

.

Power Saving Mode, 15 µW Typ

.

Overvoltage Protection on Analog Inputs