ADC122S051 Datasheet | National Semiconductor

Description The ADC122S051 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 is fully specified over a sample rate range of 200 k SPS to 500 k SPS. 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 patible with several standards, such as SPI™, QSPI™, MICROWIRE, and many mon DSP serial interfaces. The ADC122S051 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 m W and 10 m W, 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 is packaged in an 8-lead MSOP package. Operation over the industrial temperature range of - 40˚C to +85˚C is guaranteed. Features n n n n Specified over a range of sample rates. Two input channels Variable power management Single power supply with 2.7V - 5.25V range Key Specifications n n n n DNL INL SNR Power Consumption - 3V Supply - 5V Supply +0.7 / - 0.4 LSB (typ) ± 0.50 LSB (typ) 72.5 d B (typ) 3.0 m W (typ) 10 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 ADC122S021 ADC102S021 ADC082S021 Specified for Sample Rate Range of: 200 to 500 k SPS ADC122S051 ADC102S051 ADC082S051 500 k SPS to 1 MSPS ADC122S101 ADC102S101 ADC082S101 Connection Diagram Ordering Information Order Code ADC122S051CIMM ADC122S051CIMMX ADC122S051EVAL Temperature Range - 40˚C to +85˚C - 40˚C to +85˚C Description 8-Lead MSOP Package 8-Lead MSOP Package,...