AD7845JPZ

Overview

The AD7845JPZ is a 12-bit CMOS multiplying digital-to-analog converter (MDAC) with an integrated output amplifier, manufactured by Analog Devices Inc. It operates on the LC2MOS process and supports 4-quadrant multiplication. The device features a parallel interface with TTL and 5 V CMOS compatible inputs. Key electrical parameters include a resolution of 12 bits, a settling time of 5 µs to 0.01% full-scale range, and a maximum power dissipation of 650 mW. It utilizes ±15 V analog supplies and a +5 V digital supply. The component is housed in a 28-lead Plastic Leaded Chip Carrier (PLCC) package.

Feature Summary

• Integrated 4-quadrant multiplying DAC with on-chip output amplifier
• Three on-chip application resistors for gain ranging and offset adjustment
• TTL and 5 V CMOS compatible digital inputs
• Guaranteed monotonic operation over temperature range

Applications

• Automatic Test Equipment
• Digital Attenuators
• Programmable Power Supplies
• Programmable Gain Amplifiers
• Digital-to-4–20 mA Converters

Procurement Notes

Verify the specific suffix JPZ corresponds to the 28-lead PLCC package and commercial temperature range (0°C to +70°C). Confirm that the ordering documentation specifies the J version accuracy grades, as other versions like KPZ offer different linearity specifications within the same package type.

Selection Notes

Select the AD7845JPZ when a 12-bit resolution with an integrated buffered output is required for space-constrained designs. Ensure the system requires a parallel interface and can accommodate the specified ±15 V analog supply rails. Verify that the 5 µs settling time meets the dynamic performance requirements of the target application.

Part Context

The AD7845 series represents the industry's first 4-quadrant multiplying D/A converter with an on-chip amplifier. The J suffix denotes the commercial temperature grade (0°C to +70°C), while the P suffix indicates the 28-terminal Plastic Leaded Chip Carrier (PLCC) package option among other available form factors like DIP and SOIC.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.