A/D converter runs at 1.6MSPS, claims industry's fastest title

5th June 2014

Mick Elliott

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Datasheet

Mouser Electronics says it is the first distributor to ship the new MAX11905 Single Channel SAR Analog-to-Digital Converter from Maxim Integrated. The device is a single-channel 20-bit Successive Approximation Register (SAR) Analog to Digital Converter (ADC). At 1.6 million samples per second (MSPS) it is the industry's fastest 20-bit ADC. It is designed to provide excellent static and dynamic performance with best-in-class power consumption.

The A/D converter is a single-channel, fully differential input ADC that achieves 20-bit resolution with no missing codes. It achieves a high sampling rate and resolution while consuming very little power and conserving board space. Board space is saved by including an internal oscillator and internal reference buffers. The device has dedicated input clamps to provide ESD protection as well as protect the ADC input from overranging. The device achieves an excellent 98.3dB Signal-to-Noise Ratio (SNR) and -123dB Total Harmonic distortion (THD).

It communicates digital data over an SPI interface that also supports QSPI and Microwire. The digital output of this serial interface, DOUT, has a programmable driver output which saves board space by reducing external components. Many features of the device are read or set by this serial interface, including DOUT output driver strength, power down modes, reset status, and power up status, as well as the conversion result.

Power draw is only 9mW at 1.6Msps, extremely low for an ADC in this class. The high resolution and excellent sensitivity and accuracy of the device targets low power applications as well as battery powered data acquisition equipment such as medical instrumentation, battery-powered test equipment, and industrial automation applications.