AD574ASD/883

Product Summary

The AD574ASD/883 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 AD574ASD/883 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 of the AD574ASD/883 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.

Parametrics

AD574ASD/883 absolute maximum ratings: (1)VCC to Digital Common: 0 V to +16.5 V; (2)VEE to Digital Common: 0 V to –16.5 V; (3)VLOGIC to Digital Common: 0 V to +7 V; (4)Analog Common to Digital Common: ±1 V; (5)Control Inputs (CE, CS, AO 12/8, R/C) to Digital Common: –0.5 V to VLOGIC + 0.5 V; (6)Analog Inputs (REF IN, BIP OFF, 10 VIN) to Analog Common: VEE to VCC; (7)20 VIN to Analog Common: ±24 V; (8)Chip Temperature: 175℃; (9)Power Dissipation: 825 mW; (10)Lead Temperature (Soldering, 10 sec): +300℃; (11)Storage Temperature (Ceramic): –65℃ to +150℃.

Features

AD574ASD/883 features: (1)Complete 12-Bit A/D Converter with Reference and Clock; (2)8- and 16-Bit Microprocessor Bus Interface; (3)Guaranteed Linearity Over Temperature: 0℃ to +70℃ – AD574AJ, K, L -55℃ to +125℃ – AD574AS, T, U; (4)No Missing Codes Over Temperature; (5)35 ms Maximum Conversion Time; (6)Buried Zener Reference for Long-Term Stability and Low Gain TC 10 ppm/℃ max AD574AL 12.5 ppm/℃ max AD574AU; (7)Ceramic DIP, Plastic DIP or PLCC Package; (8)Available in Higher Speed, Pinout-Compatible Versions; (9)Available in Versions Compliant with MIL-STD-883 and JAN QPL.

Diagrams