ADC121S021 Datasheet | National Semiconductor

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 k SPS to 200 k SPS. The converter is based upon a successiveapproximation register architecture with an internal trackand-hold circuit. The output serial data is straight binary, and is patible with several standards, such as SPI™, QSPI™, MICROWIRE, and many mon 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 m W and 7.9 m W, 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 patible 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 d B (typ) 1.5 m W (typ) 7.9 m W (typ) Applications n Portable Systems n Remote Data Acquisition n Instrumentation and Control Systems Pin-patible Alternatives by Resolution and Speed All devices are fully pin and function patible. Resolution 50 to 200 k SPS 12-bit 10-bit 8-bit .. Specified for Sample Rate Range of: 200 to 500 k SPS ADC121S051 ADC101S051 ADC081S051 500 k SPS to 1 MSPS ADC121S101 ADC101S101 ADC081S101 ADC121S021 ADC101S021 ADC081S021 Connection Diagram Ordering Information Order Code ADC121S021CIMF ADC121S021CIMFX ADC121S021EVAL Temperature Range - 40˚C to +85˚C - 40˚C to +85˚C Description 6-Lead SOT-23 Package 6-Lead SOT-23 Package, Tape & Reel SOT-23 Evaluation Board Top Mark X07C...