ADC121S021

ADC121S021 Single Channel, 200 ksps, 12-Bit A/D Converter October 2005 ADC121S021 Single Channel, 200 ksps, 12-Bit A/D Converter General Description The ADC121S021 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 ADC121S021 is fully specified over a sample rate range of 50 kSPS to 200 kSPS. The converter is based upon a successiveapproximation register architecture with an internal trackand-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 ADC121S021 operates with a single supply that can range from +2.7V to +5.25V. Normal power consumption using a +3V or +5V supply is 1.5 mW and 7.9 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 µW using a +5V supply. The ADC121S021 is packaged in a 6-lead SOT-23 package. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed. Features n n n n n Specified over a range of sample rates. 6-lead SOT-23 package Variable power management Single power supply with 2.7V - 5.25V range SPI™/QSPI™/MICROWIRE/DSP compatible Key Specifications n n n n DNL INL SNR Power Consumption — 3V Supply — 5V Supply +0.45/-0.25 LSB (typ) +0.45/-0.4 LSB (typ) 72.3 dB (typ) 1.5 mW (typ) 7.9 mW (typ) Applications n Portable Systems...