AD7890

FEATURES Fast 12-bit ADC with 5.9 μs conversion time Eight single-ended analog input channels Selection of input ranges: ±10 V for AD7890-10 0 V to 4.096 V for AD7890-4 0 V to 2.5 V for AD7890-2 Allows separate access to multiplexer and ADC On-chip track/hold amplifier On-chip reference High-speed, flexible, serial interface Single supply, low-power operation (50 mW maximum) Power-down mode (75 μW typ) GENERAL DESCRIPTION The AD7890 is an 8-channel 12-bit data acquisition system. The part contains an input multiplexer, an on-chip track/hold amplifier, a high speed 12-bit ADC, a 2.5 V reference, and a high speed, serial interface. The part operates from a single 5 V supply and accepts an analog input range of ±10 V (AD7890-10), 0 V to 4.096 V (AD7890-4), and 0 V to 2.5 V (AD7890-2). The multiplexer on the part is independently accessible. This allows the user to insert an antialiasing filter or signal conditioning, if required, between the multiplexer and the ADC. This means that on...