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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 24SOIC
- Series：DACPORT®
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Number of Bits：12
- Number of D/A Converters：2
- Settling Time：8µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel
- 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：24-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：24-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7237AARZ-REEL7 is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, packaged in a 24-lead SOIC. It integrates on-chip voltage reference and output amplifiers, eliminating the need for external trimming. The device operates with supply voltages ranging from +10.8 V to +16.5 V for VDD and -10.8 V to -16.5 V for VSS. Key electrical specifications include a typical settling time of 8 µs, a resolution of 12 bits, and a maximum power dissipation of 300 mW. It supports single or dual supply configurations, offering unipolar (0 V to +5 V, 0 V to +10 V) and bipolar (±5 V) output ranges.
Feature Summary
- Dual 12-bit DAC architecture with integrated 5 V Zener reference and buffered output amplifiers
- Parallel loading structure with double-buffered interface for 8-bit microprocessor compatibility
- Settling time of 8 µs max and low power consumption of 165 mW typ in single supply mode
- Flexible output range configuration via ROFS pins for unipolar and bipolar operation
Applications
- Microprocessor-based data acquisition systems requiring direct interfacing
- Programmable gain amplifier control circuits
- Instrumentation requiring precise voltage generation with minimal external components
Procurement Notes
Verify the specific suffix REEL7 indicates tape-and-reel packaging when sourcing. Confirm that the A-grade version meets the required temperature range of -40°C to +85°C. Ensure supply voltage tolerances align with the ±10% specification for this grade. Check for moisture sensitivity level 3 requirements during storage and handling.
Selection Notes
Select the AD7237A variant over the AD7247A if an 8-bit data bus interface with double buffering is preferred. Verify that the required output current capability (+10 V across 2 kΩ load) fits within the amplifier's drive limits. Consider the 24-SOIC package dimensions for PCB layout constraints compared to DIP options.
Part Context
This component belongs to the AD7237/AD7247 DACPORT family, representing an enhanced version of industry-standard parts. Improvements include extended operation down to 12 V supplies and faster interface times. The part is fabricated using Linear Compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low-power CMOS logic.
Replacement Considerations
The AD7237ABRZ is a direct pin-compatible replacement available in tube packaging. For military specifications, the AD7237AAN/883B offers MIL-STD-883 Class B processing. No other direct functional substitutes are documented in the provided datasheet.
