Description

The AS1530/AS1531 are low-power, 4/8-channel, 400/300ksps, 12-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.
Both devices analog inputs are software configurable for single-ended, pseudo-differential and differential operation.

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, AS1530; 2.2mA @ 300ksps, AS1531) and feature two power down modes. A reduced-power mode using only 0.4mA and a full power-down mode (0.5µA) to lower power consumption at slower throughput rates. When using the power-down modes, accessing the serial interface automatically wakes up the devices while the fast turn-on time allows them to be powered down between all conversions.

The devices operate from a single supply (+4.5 to +5.5V, AS1530; +2.7 to +3.6V, AS1531). 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.

The devices are available in a 20-pin TSSOP package.