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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 16SOIC
- Series：DACPORT®
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Number of Bits：12
- Number of D/A Converters：2
- Settling Time：10µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：SPI
- Reference Type：External, Internal
- Voltage - Supply, Analog：±10.8V ~ 16.5V
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：±1 (Max), ±0.9 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7249AR-REEL is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, packaged in a 16-lead SOIC. It integrates output amplifiers and a Zener voltage reference on a monolithic LC2MOS chip, eliminating the need for external trims. The device supports serial interfacing with a 125 kHz DAC update rate. Key electrical parameters include a resolution of 12 bits, a settling time of 10 µs maximum, and an operating temperature range of -40°C to +85°C. Power supply requirements are VDD from +10.8V to +16.5V and VSS from -10.8V to -16.5V for dual supply operation.
Feature Summary
- Dual 12-bit CMOS DAC channels with integrated output amplifiers and internal Zener voltage reference.
- Three selectable output ranges per channel: -5 V to +5 V, 0 V to +5 V, or 0 V to +10 V.
- 3-wire serial interface compatible with DSP processors and microcontrollers, supporting data rates up to 2 MHz.
- Clear function resets outputs to a known state, useful for power-on reset scenarios.
Applications
- Process Control systems
- Industrial Automation
- Digital Signal Processing Systems
- Input/Output Ports
Procurement Notes
Verify the 'AR' suffix indicates the industrial temperature grade (-40°C to +85°C) and SOIC package. Confirm the '-REEL' suffix denotes tape-and-reel packaging. Check current availability status as distribution may vary. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS technology.
Selection Notes
Select this component when a dual-channel 12-bit DAC with integrated buffering and reference is required. Choose based on the necessary output voltage range configuration via the ROFS pins. Verify that the serial interface timing meets the system's clock and synchronization requirements. Consider the power supply constraints, specifically the need for dual supplies if bipolar output is desired.
Part Context
The AD7249 belongs to the DACPORT family of analog-to-digital and digital-to-analog converters. The AD7249AR-REEL is the surface-mount variant of the AD7249AN (DIP package). It shares core specifications with other grades like the AD7249BNZ but differs in package type and potentially manufacturing lot characteristics defined by the suffix.
Replacement Considerations
Direct replacement options within the same family include the AD7249ARZ (RoHS compliant version of the AR). For DIP packages, the AD7249ANZ is available. Cross-family replacements should be evaluated based on pin compatibility and performance specifications.
