1FEATURES
2• Specified Over a Range of Sample Rates.
• 6-lead WSON and SOT-23 Packages
• Variable Power Management
• Single Power Supply with 2.7V - 5.25V Range
• SPI™/QSPI™/MICROWIRE/DSP Compatible

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

KEY SPECIFICATIONS
• DNL +0.5/-0.25 LSB (typ)
• INL +0.45/-0.40 LSB (typ)
• SNR 72.0 dB (typ)
• Power Consumption
– 3.6V Supply 1.7 mW (typ)
– 5.25V Supply 8.7 mW (typ)

DESCRIPTION
The ADC121S051 is a low-power, single 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 ADC121S051 is fully specified over a
sample rate range of 200 ksps to 500 ksps. The converter is based upon a successive-approximation
register architecture with an internal track-and-hold
circuit.
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 ADC121S051 operates with a single supply that
can range from +2.7V to +5.25V. Normal power
consumption using a +3.6V or +5.25V supply is 1.7
mW and 8.7 mW, respectively. The power-down
feature reduces the power consumption to as low as
2.6 μW using a +5.25V supply.
The ADC121S051 is packaged in 6-lead WSON and
SOT-23 packages. Operation over the industrial
temperature range of −40°C to +85°C is ensured.