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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.