AD7845KRZ-REEL

Overview

The AD7845KRZ-REEL is a 12-bit CMOS multiplying digital-to-analog converter (MDAC) with an integrated output amplifier, fabricated on the LC2MOS process. It features full 4-quadrant multiplication capability and guaranteed monotonicity across temperature ranges. The device includes three on-chip application resistors for gain ranging and offset adjustment. It operates with ±15 V supplies and accepts TTL/CMOS compatible digital inputs. The K version ensures relative accuracy of -1/2 LSB at +25°C and -3/4 LSB over the commercial temperature range of 0°C to +70°C.

Feature Summary

• 12-bit resolution with 4-quadrant multiplying capability and on-chip output amplifier
• Integrated application resistors (RA, RB, RC) for simplified gain ranging and offsetting
• Guaranteed monotonic operation from TMIN to TMAX
• TTL and 5 V CMOS compatible digital inputs with simple microprocessor interfacing

Applications

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

Procurement Notes

Verify the ordering suffix 'KRZ-REEL' against official Analog Devices documentation to confirm package type (SOIC-24) and reel packaging format. Ensure compatibility with required operating temperature range (0°C to +70°C for K grade). Confirm supply voltage requirements match system design (+15 V / -15 V nominal).

Selection Notes

Select this component when 4-quadrant multiplication and integrated buffering are required in a space-saving surface-mount package. The K grade offers tighter accuracy (-1/2 LSB) compared to the J grade (-1 LSB) within the commercial temperature range. Consider the internal application resistors if gain scaling or offset adjustments are needed without external components.

Part Context

The AD7845 series represents the industry's first 4-quadrant multiplying DAC with an on-chip amplifier. The KRZ variant specifically denotes the K accuracy grade housed in a 24-lead SOIC package, supplied in a tape-and-reel configuration for automated assembly processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.