Mfr Part #:

AD421BRZ

Mfr Name: AD

The AD421BRZ is a 16-bit, loop-powered digital-to-current converter from Analog Devices, designed for smart industrial control transmitters. It provides a 4 mA to 20 mA current output and HART compatibility.

✓ Total Stock: 2,525 pcs

$ Price Range: $2.13

AD421BRZ Available from 2 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Smaxon Electronics ✓ Non-Authorised Inventory information	2,500 pcs On Request	2500 pcs	On Request	1	On Request	On Request	17+	On Request	On Request
Partservice ✓ Non-Authorised Inventory information	25 pcs On Request	25 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

AD421BRZ Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	AD
Interface	High Speed Serial
Mounting Type	Through Hole
Quiescent Current	750 µA
Resolution	16-Bit
Settling Time	8 ms

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AD421BRZ Description

Short technical summary and product information.

The Analog Devices AD421BRZ is a high-performance, low-cost single-chip solution for generating 4 mA to 20 mA signals in smart industrial control transmitters. This 16-bit digital-to-analog converter (DAC) offers 16-bit resolution and monotonicity, with an integral nonlinearity of 0.01%. It features a programmable alarm current capability and a flexible high-speed serial interface.

The AD421BRZ is loop-powered and includes a selectable regulator that can provide +3 V, +3.3 V, or +5 V to power external circuits. It also integrates precision voltage references of +1.25 V and +2.5 V, eliminating the need for discrete components. The device is fully compatible with standard HART circuitry and similar FSK protocols.

Available in 16-lead SOIC and PDIP packages, the AD421BRZ is suitable for through-hole mounting. Its quiescent current is a maximum of 750 µA. The full-scale settling time to ±0.1% is typically 8 ms, making it efficient for demanding industrial applications requiring precise current output.

This DAC is ideal for extending the resolution of smart 4 mA to 20 mA transmitters at a very low cost. Its design simplifies transmitter circuitry and enhances performance in industrial automation and control systems.

AD421BRZ Quick Information

Product Type: Current Output DAC

Canonical Name: AD421BRZ 16-Bit Current Output DAC

Subcategory: Current Output DAC

AD421BRZ Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

AD421BRZ Estimated Pricing

Qty	Low	High
1+	$2.13	$2.13

Estimated market price range - modelled values for guidance only, not live distributor offers.

AD421BRZ Features

16-bit resolution and monotonicity.
4 mA to 20 mA current output.
HART compatible for communication.
Selectable 3V, 3.3V, or 5V regulator output.
Integrated 1.25V and 2.5V precision references.

AD421BRZ Applications

Ideal for smart industrial transmitters.
Extends resolution of 4-20mA transmitters.
Used in industrial control systems.
Supports HART communication protocols.

AD421BRZ FAQs

7 frequently asked questions generated from this part’s specifications.

What is the current output range of the AD421BRZ?

The current output range is 4-20 mA.

What is the resolution of the AD421BRZ?

The resolution is 16 bits.

What are the available regulator output voltages for the AD421BRZ?

The regulator output voltages are +3 V, +3.3 V, or +5 V.

What is the maximum integral nonlinearity of the AD421BRZ?

The maximum integral nonlinearity is 0.01%.

What is the typical settling time for the AD421BRZ?

The typical settling time is 8 milliseconds.

What packaging options are available for the AD421BRZ?

It is available in 16-Lead SOIC and PDIP packages.

Is the AD421BRZ compatible with HART protocol?

Yes, it is HART® compatible.