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Product Detailed Parameters
- Description：IC DAC 16BIT 16SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Type：DAC
- Number of Channels：1
- Resolution (Bits)：16 b
- Sampling Rate (Per Second)：-
- Data Interface：MICROWIRE™, Serial
- Voltage Supply Source：Single Supply
- Voltage - Supply：3V, 3.3V, 5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：16-SOIC
- Grade：-
- Qualification：-
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Overview
The AD421BRRL is a loop-powered, 16-bit digital-to-analog converter (DAC) designed for industrial control smart transmitters. It generates a 4 mA to 20 mA current output with 16-bit monotonicity and ±0.01% integral nonlinearity. The device features an integrated voltage regulator providing selectable +3 V, +3.3 V, or +5 V outputs, alongside precision +1.25 V and +2.5 V references. It operates on a flexible high-speed serial interface supporting up to 10 Mbps and includes programmable alarm current capabilities. The component is specified over the industrial temperature range of –40 °C to +85 °C in a 16-lead SOIC package.
Feature Summary
- 16-bit resolution with guaranteed monotonicity and ±0.01% INL
- Integrated 3 V/3.3 V/5 V regulator and 1.25 V/2.5 V precision references
- HART® compatible with programmable alarm current capability
- High-speed 3-wire serial interface operating up to 10 Mbps
Applications
- Loop-powered smart industrial control transmitters
- 4 mA to 20 mA signal generation for process automation
- HART protocol communication systems
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure compatibility with required loop voltage compliance and external pass transistor selection for the intended application environment.
Selection Notes
Select this component for applications requiring a fully integrated solution for 4–20 mA loops without discrete regulators or references. Consider the need for an external depletion-mode FET pass transistor to handle loop voltages exceeding the internal regulator limits. Verify serial interface timing requirements against the microcontroller's clock capabilities.
Part Context
The AD421BRRL belongs to the AD421 family of loop-powered DACs from Analog Devices. It is specifically the reel version of the AD421BR, housed in a 16-lead SOIC package. This part is designed to replace discrete solutions by integrating the DAC, regulator, and references into a single compact chip.
Replacement Considerations
Direct pin-compatible replacements within the same family include AD421BN and AD421BR. For upgraded performance, consider the AD5421, which offers similar functionality with enhanced features.
