A/D convertors offer low power consumption

The AS1528/29 A/D convertors suit small battery-powered devices and portable data acquisition systems such as remote sensors or pen digitisers.

austriamicrosystems has released the AS1528 10bit, ultra-low power, single-channel, fully-differential A/D convertor and the AS1529 dual-channel single-ended ultra-low power A/D convertor.

Combining ultra-low power operation at a high sampling speed of 150ksample/s with excellent dynamic performance in a small 3 x 3mm TDFN 8pin package, the AS1528/29 family is an optimal solution for small battery-powered devices and portable data acquisition systems such as remote sensors or pen digitisers.

They also consume less than 350uA (3V) at the maximum sampling rate.

The automatic shutdown feature places the device into sleep mode between conversions, significantly reducing power consumption at lower sampling speeds.

Power consumption drops to 245uA (3V) at a reduced speed of 100ksample/s, and down to only 2.5uA at a still 1ksample/s and 200nA during shutdown.

"These A/D convertors are perfect for applications with extremely demanding power consumption and space requirements".

"One of the key aspects of their design in terms of power reduction is the intelligent automatic shutdown".

"Thanks to this design, the AS1528/29 is always at the perfect operating point drawing the minimum current across all sampling rates", said Walter Moshammer, Marketing Director Standard Linear at austriamicrosystems.

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 2.7 to 5.25V single supply.

The AS1528/29 family is available in an eight-pin 3 x 3mm TDFN package suitable for operating environments ranging from -40C to +85C.

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