5962-8770203RX

Overview

The AD7545 is a monolithic 12-bit CMOS multiplying digital-to-analog converter (DAC) featuring onboard data latches. It accepts a single 12-bit wide word and directly interfaces with most 12- and 16-bit bus systems via parallel inputs. The device operates on a single supply voltage ranging from +5 V to +15 V, dissipating less than 0.5 mW at +5 V with CMOS logic levels. Key static performance metrics include a typical gain temperature coefficient of 2 ppm/°C, a current settling time of 2 µs to 1/2 LSB, and differential nonlinearity specifications varying by grade from ±1/2 LSB to ±4 LSB.

Feature Summary

• 12-bit resolution with R-2R ladder architecture and onboard TTL-compatible data latches
• Single +5 V to +15 V supply operation with low power consumption (<0.5 mW at 5 V)
• Multiplying capability allowing VREF to be driven by AC or DC signals of positive or negative polarity
• Latch-free design eliminating the need for Schottky protection diodes

Applications

• Battery-operated equipment requiring low power consumption
• Applications involving wide temperature variations
• Direct interfacing with 8-bit and 16-bit microprocessor buses
• Voltage switching mode circuits and attenuators

Procurement Notes

Verify the specific suffix code (N, Q, P, E, or /883B) against the required package type and temperature range. Confirm that the selected grade meets the differential nonlinearity and gain error specifications for the target application. Ensure proper ESD precautions are observed during handling due to the CMOS construction.

Selection Notes

Select the grade based on required accuracy and operating temperature. Commercial grades (J, K, L) cover 0°C to +70°C, Industrial (A, B, C) cover -25°C to +85°C, and Extended (S, T, U) cover -55°C to +125°C. Higher accuracy grades (L, GL) offer tighter linearity but may require external trim resistors depending on the circuit configuration. Verify package availability (DIP, PLCC, LCCC, or CerDip) matches the PCB layout.

Part Context

The AD7545 is part of the Analog Devices CMOS DAC family. Military versions are available under the MIL-STD-883 Class B process designation, referenced in DESC drawing 5962-87702. The device serves as a foundational component for precision analog signal generation in mixed-signal systems.

Replacement Considerations

Public confirmed substitute part numbers: MX7545JCWP+, LTC7545AKG#PBF.