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AD7845KN
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Product Detailed Parameters
- Description：IC DAC 12BIT MULT LC2MOS 24-DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：-
- Number of D/A Converters：-
- Settling Time：-
- Output Type：-
- Differential Output：-
- Data Interface：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：-
- Architecture：-
- Operating Temperature：-
- Package / Case：24-DIP (0.300", 7.62mm)
- Supplier Device Package：24-PDIP
- Mounting Type：Through Hole
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Overview
The AD7845KN is a complete 12-bit CMOS multiplying digital-to-analog converter (MDAC) featuring an integrated output amplifier. Fabricated on the LC2MOS process, it supports full 4-quadrant multiplication with TTL and 5 V CMOS compatible digital inputs. The device includes three on-chip application resistors for gain ranging and offset adjustment. It operates within a commercial temperature range of 0°C to +70°C and guarantees monotonicity across this range. Key electrical specifications include a relative accuracy of ±1/2 LSB at +25°C, a settling time of 5 µs maximum, and power supply ranges of ±14.25 V to ±15.75 V.
Feature Summary
- Integrated output amplifier providing voltage output capability
- Full 4-quadrant multiplying functionality
- Three on-chip application resistors for gain scaling
- Guaranteed monotonic operation from TMIN to TMAX
Applications
- Automatic Test Equipment
- Programmable Power Supplies
- Digital Attenuators
- Programmable Gain Amplifiers
- Digital-to-4–20 mA Converters
Procurement Notes
Verify the specific ordering suffix KN against the manufacturer's current production status. Confirm that the N-24 package option aligns with the required PCB footprint. Ensure that the commercial temperature grade meets the operational environment requirements. Cross-reference the datasheet revision B specifications with the latest official documentation before finalizing procurement.
Selection Notes
Select the AD7845KN when a compact solution combining a 12-bit DAC and buffer is required. The N-24 package offers space savings compared to discrete implementations. Verify that the ±15 V supply rails are available in the system design. Consider the internal application resistors if gain ranging or offset adjustments are needed without external components.
Part Context
The AD7845KN belongs to the AD7845 family of multiplying DACs. It shares core architecture with variants such as the AD7845JN and AD7845JPZ but differs in accuracy grade and package type. The 'K' suffix denotes a tighter relative accuracy specification of ±1/2 LSB compared to the standard ±1 LSB grade. The 'N' suffix indicates the 24-lead plastic DIP package.
Replacement Considerations
The AD7845JN serves as a functional substitute with identical pinout and specifications, differing only in the ±1 LSB accuracy grade. The AD7845KRZ offers the same accuracy and features in a surface-mount SOIC package.
