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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 16DIP
- Series：DACPORT®
- Mfr：Analog Devices Inc.
- Package：Tube
- 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-DIP (0.300", 7.62mm)
- Supplier Device Package：16-PDIP
- Mounting Type：Through Hole
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Overview
The AD7249AN is a dual 12-bit voltage-output digital-to-analog converter (DAC) featuring on-chip amplifiers and a Zener voltage reference. It operates with single or dual supplies, offering selectable output ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V. The device utilizes a 3-wire serial interface supporting data rates up to 2 MHz for a 125 kHz DAC update rate. Packaged in a 16-lead DIP, it provides low power dissipation and requires no external trims for specified performance.
Feature Summary
- Dual 12-bit CMOS DAC channels with integrated output amplifiers and internal 5 V Zener reference
- Three selectable output voltage ranges per channel: 0 V to +5 V, 0 V to +10 V, and ±5 V
- Serial interface compatible with DSPs and microcontrollers, supporting 125 kHz update rate
- Clear function resets outputs to a known state, useful for power-on reset
Applications
- Process control systems
- Industrial automation equipment
- Digital signal processing systems
- Input/output ports
Procurement Notes
Verify the suffix 'AN' corresponds to the industrial temperature range (-40°C to +85°C) and 16-lead DIP package as specified in the datasheet. Confirm supply voltage tolerances, as the A version allows ±10% tolerance compared to ±5% for other grades. Ensure ESD precautions are observed during handling due to sensitivity.
Selection Notes
Select the AD7249AN when a dual-channel solution with integrated buffering and reference is required in a DIP package. Choose this part over SOIC variants if through-hole mounting is necessary. Verify that the required output range matches the available configurations and that the serial interface timing aligns with the host processor's capabilities.
Part Context
The AD7249 belongs to Analog Devices' DACPORT family, designed for monolithic integration of DACs and amplifiers. The 'A' grade denotes the industrial temperature range specification. The 'N' suffix typically indicates a lead-free or specific packaging variant within the DIP form factor, consistent with industry naming conventions for this series.
Replacement Considerations
Direct substitutes include other AD7249 variants such as AD7249AR (SOIC package) or AD7249BNZ (PDIP package). When replacing, ensure the pinout compatibility between DIP packages and verify that the thermal impedance and power dissipation limits of the new package meet the application requirements.
