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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 28PLCC
- Series：DACPORT®
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Number of D/A Converters：1
- Settling Time：7µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel
- Reference Type：Internal
- Voltage - Supply, Analog：±10.8V ~ 16.5V
- Voltage - Supply, Digital：10.8V ~ 16.5V
- INL/DNL (LSB)：±1 (Max), ±1 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°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 AD7245AAPZ is a 12-bit CMOS digital-to-analog converter (DAC) from the DACPORT family, manufactured by Analog Devices. It integrates an output amplifier and a buried Zener voltage reference on a single monolithic chip. The device operates with supply voltages ranging from +10.8 V to +16.5 V for both analog and digital rails. Key electrical specifications include a typical settling time of 7 µs, a differential nonlinearity (DNL) of ±1 LSB, and an integral nonlinearity (INL) of ±0.75 LSB. It features a parallel data interface and delivers a buffered voltage output. The component is housed in a 28-lead Plastic Leaded Chip Carrier (PLCC) package and supports an operating temperature range from -40°C to +85°C.
Feature Summary
- Integrated 12-bit DAC with on-chip output amplifier and 5 V buried Zener reference
- Parallel loading structure with asynchronous LDAC and CLR signals
- Extended plastic temperature range (-40°C to +85°C)
- ±1/2 LSB linearity grade with guaranteed monotonicity
Applications
- Microprocessor-compatible data acquisition systems
- Industrial process control loops requiring precise voltage generation
- Calibration equipment utilizing internal reference stability
Procurement Notes
Verify the specific ordering suffix 'P' corresponds to the PLCC-28 package configuration required for the design. Confirm that the power supply rails remain within the specified +10.8 V to +16.5 V range to ensure performance meets the documented linearity and settling time parameters. Check for moisture sensitivity handling requirements during assembly.
Selection Notes
Select the AD7245AAPZ when a single-chip solution with integrated reference and amplifier is needed for 12-bit resolution applications. Ensure the system requires a parallel interface with word input loading. Compare settling time requirements against the 7 µs specification. Consider the PLCC-28 surface mount package constraints versus through-hole alternatives like the DIP or SOIC variants if board layout differs.
Part Context
The AD7245A is an enhanced version of the industry-standard AD7245, offering improved interface speeds and operation from 12 V to 15 V supplies. It belongs to the DACPORT family, which combines precision bipolar circuits with low-power CMOS logic using the LC2MOS process. This integration reduces space and increases reliability compared to multichip designs.
Replacement Considerations
The AD7245ABP offers a tighter ±1/2 LSB linearity grade within the same package. For dual-supply operations requiring extended temperature ranges, the AD7245ATE is available in a ceramic LCCC package.
