General Description

The AS1543/44 is a 12-bit high-speed, low-power, 8/4-channel, successive-approximation ADC that operates from a single 2.7 to 5.25V supply. The device features high throughput rates (1Msps) and a low-noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 1 MHz.

2 Key Features

Single Supply Operation with VDRIVE Function: 2.7 to 5.25V

Fast Throughput Rate: 1 Msps

Sequencer & Channel Counter

Software-Configurable Analog Input Types:

- 8/4-Channel Single-Ended

- 4/2-Channel Fully-Differential

Software-Configurable Input Range

Low Power Consumption at Max Throughput Rates:

- 10.1mW @ 1Msps (3.6V Supply)

- 18.4mW @ 1Msps (5.25V Supply)

Shutdown Mode Current: 0.5µA

Flexible Power/Serial Clock Speed Management

Wide Input Bandwidth: 71dB SNR @ 50 kHz Input Frequency

No Pipeline Delays

High Speed SPI/QSPI/Microwire/DSP Interface

TQFN(4x4)-20 Package

Applications

The devices are ideal for remote sensors, data-acquisition and data-logging devices, pen-digitizers, process control, or any other space-limited A/D application with low power-consumption requirements.