ADI AD574AJPZ

The AD574A is a complete 12-bit successive-approximation analog-to-digital converter with 3-state output buffer circuitry for direct interface to an 8- or 16-bit microprocessor bus. A high precision voltage reference and clock are included on-chip, and the circuit guarantees full-rated performance without external circuitry or clock signals. The AD574A design is implemented using Analog Devices' Bipolar /I²L process, and integrates all analog and digital functions on one chip. Offset, linearity and scaling errors are minimized by active laser-trimming of thin-film resistors at the wafer stage. The voltage reference uses an implanted buried Zener for low noise and low drift. On the digital side, I²L logic is used for the successive-approximation register, control circuitry and 3-state output buffers. The AD574A is available in six different grades. The AD574AJ, K, and L grades are specified for operation over the 0°C to +70°C temperature range. The AD574AS, T, and U are specified for the -55°C to +125°C range. All grades are available in a 28-pin hermetically-sealed ceramic DIP. Also, the J, K, and L grades are available in a 28-pin plastic DIP and PLCC, and the J and K grades are available in ceramic LCC.

• Complete 12-Bit A/D Converter with Reference and Clock
• 8- and 16-Bit Microprocessor Bus Interface
• Guaranteed Linearity Over Temperature 0°C to +70°C - AD574AJ,K, L -55°C to ±125°C - AD574AS,T,U
• No Missing Codes Over Temperature
• 35 μs Maximum Conversion Time
• Buried Zener Reference for Long-Term Stability and Low Gain T.C. 10 ppm/°C max AD574AL 12.5 ppm/°C max AD574AU
• Ceramic DIP, Plastic DIP or PLCC Package
• Available in Higher Speed, Pinout-Compatible Versions 15 μs AD674B, 80 μs AD774B; 10 μs (with SHA) AD1674)
• Available in Versions Compliant with MIL-STD-883 and JAN QPL