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 ultrasmall devices perfect for battery-powered remote-sensor and data-acquisition devices.

The successive-approximation register (SAR), highspeed sampling, high-bandwidth track/hold circuitry, and multi-mode operation combine to make these devices highly-flexible and configurable.

Both devices require low supply current (2.8mA @400ksps, AS1520; 2.2mA @ 300ksps, AS1521) and feature a reduced-power mode and a power-down mode to lower power consumption at slower throughput rates.

The devices operate from a single supply (+4.5 to +5.5V, AS1520; +2.7 to +3.6V, AS1521). Both devices contain an internal 2.5V reference, an integrated reference buffer, and feature support for an external reference (1V to VDD).

Data accesses are made via the high-speed, 4-wire, SPI, QSPI-, and Microwire-compatible serial interface.