5962-8770202RX

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 a digital-to-analog glitch impulse of 400 nV·sec. The architecture utilizes an R-2R ladder network with N-channel current steering switches.

Feature Summary

• 12-bit resolution with onboard TTL-compatible data latches for direct bus interfacing
• Single +5 V to +15 V supply operation with low power consumption (<0.5 mW at 5 V)
• Multiplying DAC capability allowing VREF to exceed VDD or accept AC signals
• Latch-free design eliminating the need for Schottky protection diodes

Applications

• Battery-operated equipment requiring low power consumption
• Systems with wide temperature variations due to low gain TC
• Microprocessor interfaces using 8-bit or 16-bit address/data buses
• Voltage switching mode applications acting as attenuators or multipliers

Procurement Notes

Verify the specific grade suffix (e.g., J, K, L, A, B, C, S, T, U) corresponding to the required operating temperature range and accuracy level. Military-grade parts require adding /883B to the part number. Confirm package type availability, as Analog Devices reserves the right to ship ceramic packages (D-20) in lieu of cerdip packages (Q-20).

Selection Notes

Select based on required linearity and temperature stability. Grades J, K, L offer ±2, ±1, and ±0.5 LSB relative accuracy respectively within the commercial range. For high precision, GL/GC/GU grades guarantee ±1 LSB gain error at +25°C. Ensure external trim resistors are selected according to Table I in the datasheet to match the chosen grade's gain error specifications.

Part Context

The AD7545 belongs to the AD7545 family of CMOS multiplying DACs. It is functionally similar to other 12-bit CMOS DACs but is distinguished by its integrated latches and specific latch-free interface timing. The part number structure includes suffixes indicating temperature range (J/K/L for commercial, A/B/C for industrial, S/T/U for extended) and package type (N for PDIP, Q for Cerdip, P for PLCC, E for LCCC).

Replacement Considerations

Public confirmed substitute part numbers: MX7545JCWP+.