ADC12062

ADC12062 12-Bit 1 MHz 75 mW A D Converter with Input Multiplexer and Sample Hold December 1994 ADC12062 12-Bit 1 MHz 75 mW A D Converter with Input Multiplexer and Sample Hold General Description Using an innovative multistep conversion technique the 12-bit ADC12062 CMOS analog-to-digital converter digitizes signals at a 1 MHz sampling rate while consuming a maximum of only 75 mW on a single a 5V supply The ADC12062 performs a 12-bit conversion in three lower-resolution ‘‘flash’’ conversions yielding a fast A D without the cost and power dissipation associated with true flash approaches The analog input voltage to the ADC12062 is tracked and held by an internal sampling circuit allowing high frequency input signals to be accurately digitized without the need for an external sample-and-hold circuit The multiplexer output is available to the user in order to perform additional external signal processing before the signal is digitized When the converter is not digitizing signals it can be placed in the Standby mode typical power consumption in this mode is 100 mW Features Y Y Y Y Built-in sample-and-hold Single a 5V supply Single channel or 2 channel multiplexer operation Low Power Standby mode Key Specifications Y Y Y Y Y Sampling rate Conversion time Signal-to-Noise Ratio fIN e 100 kHz Power dissipation (fs e 1 MHz) No missing codes over temperature 1 MHz (min) 740 ns (typ) 69 5 dB (min) 75 mW (max) Guaranteed Applications Y Y Y Y Y Digital signal processor front ends...