ADC121S625

ADC121S625 www.ti.com SNAS294B – MAY 2005 – REVISED MARCH 2013 ADC121S625 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter Check for Samples: ADC121S625 FEATURES 1 2 True Differential Inputs Ensured Performance from 50ksps to 200ksps External Reference High AC Common-Mode Rejection SPI™/QSPI™/MICROWIRE/DSP Compatible Serial Interface APPLICATIONS Automotive Navigation Portable Systems Medical Instruments Instrumentation and Control Systems Motor Control Direct Sensor Interface KEY SPECIFICATIONS Conversion Rate 50 to 200 ksps Offset Error 0.4 LSB (typ) Gain Error 0.05 LSB (typ) INL ± 1 LSB (max) DNL ± 0.75 LSB (max) CMRR 82 dB (typ) Power Consumption – Active, 200 ksps 2.25 mW (typ) – Active, 50 ksps 1.33 mW (typ) – Power Down 60 nW (typ) DESCRIPTION The ADC121S625 is a 12-bit, 50 ksps to 200 ksps sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. While best performance is achieved with reference voltage between 500mV and 2.5V, the reference voltage can be varied from 100mV to 2.5V, with a corresponding resolution between 49µV and 1.22mV. The output serial data is binary 2's complement, and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE, and with many common DSP serial interfaces. The differential input, low power, automatic power down, and small size make the ADC121S625 ideal for direct connection ...