High accuracy 24bit SAR ADC simplifies integration

High accuracy 24bit SAR ADC simplifies integration

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Analog Devices (ADI) has launched its next generation of 16 to 24bit successive approximation register (SAR) data converters for instrumentation, industrial and healthcare applications The high precision SAR analogue-to-digital converters (ADCs) use ADI’s Easy Drive technology. This eliminates many traditional system-level design challenges such as strict layout guidelines, rigid digital…
By Nick Flaherty

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Analog Devices (ADI) has launched its next generation of 16 to 24bit successive approximation register (SAR) data converters for instrumentation, industrial and healthcare applications

The high precision SAR analogue-to-digital converters (ADCs) use ADI’s Easy Drive technology. This eliminates many traditional system-level design challenges such as strict layout guidelines, rigid digital interface timing requirements and the selection of companion products. A flexible SPI serial interface eases the host processor and ADC integration by providing easy-to-meet timing requirements.

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The first in the pin-compatible SAR ADC family of six is the AD4630-24 with 24bit dual-channel, simultaneous sampling at 2 MSample/s per channel. This has an integral non-linearity error (INL) of 0.9 parts per million (ppm), which is a 4x improvement over previous devices, a signal to noise ratio (SNR) of 105.7dB and a dynamic range of 109dB with a 5V reference. A block averaging filter with programmable decimation ratio can increase dynamic range up to 155.5dB.

The ADC integrates a reference buffer and all critical decoupling components into a chip scale ball grid array (CSP-BGA) package, cutting the board footprint in half.

The dual channel AD4630-24 and single channel AD4030-24 24bit 2Msps device are available now, priced at $30.95 in 1,000 unit quantities in a 64-ball 7mm x 7mm x 1.72mm CSP. Four more SAR ADCs with 16bit and 24bit resolution will launch throughout this year.

An evaluation kit, the EVAL-AD4630-24FMCZ, is available at $199.00.

www.analog.com

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