ADI AD7572BQ05

The AD7572 is a complete, 12-bit ADC that offers high speed performance combined with low, CMOS power levels. The AD7572 uses an accurate, high speed DAC and comparator in a successive-approximation loop to achieve a fast conversion time. An on-chip, buried Zener diode provides a stable reference voltage to give low drift performance over the full temperature range and the specified accuracy is achieved without any user trims. An on-chip clock circuit is provided, which may be used with a crystal for stand-alone operation, or the clock input may be driven from an external clock source such as a divided-down microprocessor clock. The only other external components required for basic operation of the AD7572 are decoupling capacitors for the supply voltages and reference output. The AD7572 has a high speed digital interface with three-state data outputs and can operate under the control of standard microprocessor Read (RD) and decoded address (CS) signals. Interface timing is sufficiently fast to allow the AD7572 to operate with most popular microprocessors, with three-state enable times of only 90ns and bus relinquish times of 75ns. The AD7572 is fabricated in Analog Devices Linear Compatible CMOS process (LC²MOS), an advanced, all ion-implanted process that combines fast CMOS logic and linear, bipolar circuits on a single chip, thus achieving excellent linear performance while still retaining low CMOS power levels. The AD7572 is available in both 0.3" wide, 24-pin DIPs and in a 28-terminal plastic leaded chip carrier (PLCC) and leadless ceramic chip carrier (LCCC).

• 12-Bit Resolution and Accuracy
• Fast Conversion Time AD7572XX05: 5μs AD7572XX12: 12.5μs
• Complete with On-Chip Reference
• Fast Bus Access Time: 90ns
• Low Power: 135mW
• Small, 0.3", 24-Pin Package and 28-Terminal Surface Mount Packages

• telecommunications
• sonar and radar signal processing
• wideband data acquisition system