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AD7845JPZ-REEL
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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 28PLCC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Number of Bits：12
- Number of D/A Converters：1
- Settling Time：5µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel
- Reference Type：External
- Voltage - Supply, Analog：±14.25V ~ 15.75V
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：±1 (Max), ±1 (Max)
- Architecture：R-2R
- Operating Temperature：0°C ~ 70°C
- Package / Case：28-LCC (J-Lead)
- Supplier Device Package：28-PLCC (11.51x11.51)
- Mounting Type：Surface Mount
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Overview
The AD7845JPZ-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. Digital inputs are TTL and 5 V CMOS compatible, interfacing via standard CS and WR signals. The output amplifier provides low offset voltage due to laser trimming and can drive loads down to 2 kΩ.
Feature Summary
- 12-bit resolution with 4-quadrant multiplying capability
- Integrated output amplifier with laser-trimmed low offset
- On-chip application resistors (RA, RB, RC) for gain/offset scaling
- TTL and 5 V CMOS compatible digital inputs
Applications
- Automatic Test Equipment
- Digital Attenuators
- Programmable Power Supplies
- Programmable Gain Amplifiers
- Digital-to-4–20 mA Converters
Procurement Notes
Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing. Confirm the specific temperature grade (J version: 0°C to +70°C) matches system requirements. Check RoHS compliance status as manufacturing processes may vary by production batch. Ensure ESD precautions are observed during handling due to device sensitivity.
Selection Notes
Select this component for applications requiring precise 4-quadrant multiplication and integrated signal conditioning. The J version is suitable for commercial environments operating between 0°C and +70°C. For industrial or extended temperature ranges, consider the A/B or S/T versions respectively. Ensure supply voltages remain within ±14.25 V to ±15.75 V for optimal performance.
Part Context
The AD7845 series represents Analog Devices' first 4-quadrant multiplying DAC with an on-chip amplifier. The JPZ variant specifically denotes the 28-lead Plastic Leaded Chip Carrier (PLCC) package. This integration reduces component count compared to discrete solutions, offering space savings in dense PCB layouts while maintaining high precision through the LC2MOS process.
Replacement Considerations
Direct pin-compatible replacements include other AD7845 variants such as AD7845JRZ (SOIC) or AD7845ARZ (SOIC) if package changes are acceptable. Verify that substitute parts maintain the same 12-bit resolution and 4-quadrant multiplication specifications.
