Low-power ADC operation offered up to 150ksps by 3mm x 3mm package

Combining low power operation at a high sampling speed of 150ksps with a small 3mm x 3mm TDFN 8-pin package, the AS1528 and AS1529 address the challenges of both power and spaceconstrained designs, such as portable data-acquisition systems, remote sensors and pen digitisers.

austriamicrosystems’ AS1528 is a single-channel fully-differential ADC and the AS1529 is a dualchannel single-ended ADC. At a supply voltage of 3V, the 10-bit AS1528 and AS1529 consume less than 350µA at the 150ksps maximum sampling rate. An intelligent automatic shutdown feature places the device into sleep mode between conversions, reducing power consumption at lower sampling speeds. With a 3V supply, power consumption drops to 245µA at 100ksps, 2.5µA at 1ksps, and to 200nA during shutdown.

The AS1528 and AS1529 offer maximum DC performance of ±0.275LSB for Integrated Non- Linearity (INL) and Differential Non-Linearity (DNL), as well as a low offset and gain error of ±0.25LSB combined with dynamic specifications of -79.5dB.

SPI, QSPI and a Microwire-compatible interface enable high-speed data access to the AS1528/29 while minimising board space. Both devices generate an internal clock, however, they also support an external clock for increased flexibility. Both ICs operate from a 2.7V to 5.25V single supply and are suitable for operating environments ranging from -40°C to 85°C.

 

FEATURES Single-supply operation: +2.7V to +5.25V Automatic shutdown between conversions Input common-mode range from ground to supply voltage 3-Wire serial interface compatible with SPI, QSPI and MICROWIRE Internal conversion clock 8-pin TDFN 3mm x 3mm package

APPLICATIONS Remote sensors Data acquisition Data-logging devices Laboratory instruments Space-limited ADC devices with strict power requirements

 

 

austriamicrosystems/AS1528 and AS1529