ADC10662 Datasheet | National Semiconductor

Description Using an innovative, patented multistep- conversion technique, the 10-bit ADC10662 and ADC10664 are 2- and 4-input CMOS analog-to-digital converters offering sub-microsecond conversion times yet dissipating a maximum of only 235 m W. The ADC10662 and ADC10664 perform a 10-bit conversion in two lower-resolution “flashes”, thus yielding a fast A/D without the cost, power dissipation, and other problems associated with true flash approaches. In addition to standard static performance specifications (Linearity, Full-Scale Error, etc.) dynamic performance (THD, S/N) is guaranteed. The analog input voltage to the ADC10662 and ADC10664 is sampled and held by an internal sampling circuit. Input signals at frequencies from dc to over 250 k Hz can therefore be digitized accurately without the need for an external sample-and-hold circuit. The ADC10662 and ADC10664 include a “speed-up” pin. Connecting an external resistor between this pin and ground reduces the typical conversion time to as little as 360 ns. For ease of interface to microprocessors, the ADC10662 and ADC10664 have been designed to appear as a memory location or I/O port without the need for external interface logic. Features n n n n Built-in sample-and-hold Single +5V supply 2- or 4-input multiplexer options No external clock required Key Specifications n Conversion time to 10 bits: 360 ns typical, 466 ns max over temperature n Sampling Rate: 1.5 MHz (min) n Low power dissipation: 235 m W (max) n Total harmonic distortion (50 k Hz): - 60 d B (max) n No missing codes over temperature Applications n n n n Digital signal processor front ends Instrumentation Disk drives Mobile telemunications Ordering Information ADC10662 Industrial (- 40˚C ≤ TA ≤ +85˚C) ADC10662CIWM Package M24B Small Outline ADC10664 Industrial (- 40˚C ≤ TA ≤ +85˚C) ADC10664CIWM Package M28B Small Outline - U.S. Patent Number 4918449 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National...