ADC121S625 Datasheet | National Semiconductor

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 500m V and 2.5V, the reference voltage can be varied from 100m V to 2.5V, with a corresponding resolution between 49µV and 1.22m V. The output serial data is binary 2’s plement, and is patible with several standards, such as SPI™, QSPI™, MICROWIRE™, and with many mon DSP serial interfaces. The differential input, low power, automatic power down, and small size make the ADC121S625 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications. Operating from a single +5V supply, the normal power consumption is reduced to a few nanowatts in the power-down mode. The ADC121S625 is a pin-patible superior replacement for the ADS7817 and is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of - 40˚C to +85˚C and clock rates of 800 k Hz to 3.2 MHz. Features n n n n n True Differential Inputs Guaranteed performance from 50ksps to 200ksps External Reference High AC mon-Mode Rejection SPI™/QSPI™/MICROWIRE™/DSP patible Serial Interface Key Specifications n n n n n n n Conversion Rate Offset Error Gain Error INL DNL CMRR Power Consumption - Active, 200ksps - Active, 50ksps - Power Down 50 to 200 ksps 0.4 LSB (typ) 0.05 LSB (typ) ± 1 LSB (max) ± 0.75 LSB (max) 82 d B (typ) 2.25 m W (typ) 1.33 m W (typ) 60 n W (typ) .. Applications n n n n n n Automotive Navigation Portable Systems Medical Instruments Instrumentation and Control Systems Motor Control Direct Sensor Interface Connection Diagram Ordering Information Order Code ADC121S625CIMM ADC121S625CIMMX ADC121S625EVAL TRI-STATE ® is a trademark of National Semiconductor Corporation. MICROWIRE™ is a trademark of National Semiconductor Corporation. QSPI™ and SPI™ are trademarks...