FEATURES
• Specified Over a Range of Sample Rates.
• Two Input Channels
• Variable Power Management
• Single Power Supply with 2.7V - 5.25V Range
• Tested per AEC-Q100 and Qualified for
Automotive Applications
• Meets AEC-Q100-011 C2 CDM Classification

APPLICATIONS
• Portable Systems
• Remote Data Acquisition
• Instrumentation and Control Systems

KEY SPECIFICATIONS
• DNL: +0.7 / −0.4 LSB (typ)
• INL: ± 0.50 LSB (typ)
• SNR: 72.5 dB (typ)
• Power Consumption:
– 3V Supply: 3.0 mW (typ)
– 5V Supply: 10 mW (typ)

DESCRIPTION
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.