The ADC122S051/ADC122S051Q is a low-power, two-channel CMOS 12-bit analog-to-digital
converter with a high-speed serial interface. Unlike the conventional practice of specifying
performance at a single sample rate only, the ADC122S051/ADC122S051Q is fully specified over a
sample rate range of 200 ksps to 500 ksps. The converter is based on a successive-approximation
register architecture with an internal track-and-hold circuit. It can be configured to accept one
or two input signals at inputs IN1 and IN2.
The output serial data is straight binary, and is compatible with several standards, such
as SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces.
The ADC122S051/ADC122S051Q operates with a single supply that can range from +2.7V to
+5.25V. Normal power consumption using a +3V or +5V supply is 3.0 mW and 10 mW, respectively. The
power-down feature reduces the power consumption to just 0.14 µW using a +3V supply, or 0.32 µW
using a +5V supply.
The ADC122S051/ADC122S051Q is packaged in an 8-lead VSSOP package. Operation over the
industrial temperature range of −40°C to +85°C is specified.
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