General Description

The AS1520/AS1521 are low-power, 8/4-channel, 400/300ksps, 10-bit analog-to-digital (A/D) converters specifically designed to operate with single-supply devices. Superior AC characteristics, very low power consumption, and highly-reliable packaging make these ultra small devices perfect for battery-powered remote-sensor and data-acquisition devices.

2 Key Features

Single-Supply Operation:

- +4.5 to +5.5V (AS1520)

- +2.7 to +3.6V (AS1521)

Sampling Rate:

- 400ksps (AS1520)

- 300ksps (AS1521)

Software-Configurable Analog Input Types:

- 8-Channel Single-Ended

- 8-Channel Pseudo Differential Referenced to COM

- 4-Channel Pseudo Differential

- 4-Channel Fully Differential

Software-Configurable Input Range

Internal +2.5V Reference

Low-Current Operation:

- 2.8mA @ 400ksps (AS1520)

- 2.2mA @ 300ksps (AS1521)

- 0.4mA in Reduced-Power Mode

- 0.5µA in Full Power-Down Mode

SPI/QSPI/Microwire/TMS320-Compatible

20-pin TSSOP 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.