ADC12138 - National Semiconductor

ADC12138 Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters

The ADC12130, ADC12132 and ADC12138 are 12-bit plus sign successive approximation A/D converters with serial I/O and configurable input multiplexer. The ADC12132 and ADC12138 have a 2 and an 8 channel multiplexer, respectively. The differential multiplexer outputs and A/D inputs are available on the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2 pins. The ADC12130 has .

Features

n n n n n n n n Serial I/O (MICROWIRE, SPI and QSPI Compatible) 2 or 8 channel differential or single-ended multiplexer Analog input sample/hold function Power down mode Programmable acquisition time Variable digital output word length and format No zero or full scale adjustment required 0V to 5V analog input range with single 5V power supply Key Specifications n n n n n n Resolution: 12-bit plus sign 12-bit plus sign conversion time: 8.8 µs (max) 12-bit plus sign throughput time: 14 µs (max) Integral linearity error: ± 2 LSB (max) Single supply: 3.3V or 5V ± 10% Power consumption — 3.3V 15 m.