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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Analog Devices Inc. ADR3420ARJZ-R7

Name: ADR3420ARJZ-R7
Brand: Analog Devices Inc.
SKU: ADR3420ARJZ-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADR3420ARJZ-R7

Manufacturer:: Analog Devices Inc.

Category:: Voltage Reference

Package:: SOT-23-6

Datasheet:: ADR3420ARJZ-R7.pdf

Description:: IC VREF SERIES 0.1% SOT23-6

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Product details

Overview

ADR3420ARJZ-R7 from Analog Devices is a micropower, high-accuracy CMOS voltage reference delivering 2.048 V output with ±0.1% initial accuracy, 8 ppm/°C max temperature coefficient, and 15 μV_p-p (0.1 Hz to 10 Hz) output noise. It operates from −40°C to +125°C and supports ±10 mA sourcing/sinking in a 6-lead SOT-23 package, enabling precision ADC/DAC biasing in industrial instrumentation.

For engineers reviewing the ADR3420ARJZ-R7 datasheet, ADR3420ARJZ-R7 pinout, ADR3420ARJZ-R7 application, or ADR3420ARJZ-R7 equivalent, key selection criteria include low dropout (250 mV at 2 mA), 100 μA max quiescent current, 4-wire Kelvin sensing capability, and guaranteed performance across automotive-grade temperature extremes.

Technical Context

The ADR3420ARJZ-R7 uses Analog Devices' DigiTrim® technology for digital post-assembly trimming of output voltage and temperature coefficient, ensuring ±0.1% initial accuracy without laser trimming. Its dual-sense architecture (VOUT SENSE and GND SENSE) enables true 4-wire Kelvin connections to eliminate PCB trace resistance errors in high-precision signal chains.

It features an enable pin with 0.85×VIN threshold for shutdown (5 μA IQ), low hysteresis (70 ppm), and 30 ppm long-term stability after 1000 hours at 50°C-critical for systems requiring calibration retention over time without field recalibration.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.048 V ±2.048 mV - precisely matches 12-bit DAC full-scale or 2.048 V ADC reference bins without scaling.
Initial Accuracy	±0.1% - eliminates need for system-level trimming in factory calibration of data acquisition modules.
Temp Coefficient	8 ppm/°C max - contributes ≤0.98 mV drift over −40°C to +125°C, enabling stable 16-bit measurement integrity.
Quiescent Current	100 μA max - supports >10-year battery life in portable medical sensors drawing <10 μA average system current.
Dropout Voltage	250 mV at 2 mA - allows operation from 2.3 V supply, compatible with single Li-ion or two alkaline cells.
Output Noise	15 μV_p-p (0.1–10 Hz) - preserves SNR in 24-bit delta-sigma ADCs used in weigh scales and strain gauge interfaces.
Enable Threshold	V_H = 0.85×V_IN, V_L = 0.7 V - ensures clean power sequencing with standard logic-level microcontrollers.

Pinout & Package

Package: 6-lead SOT-23 (RJ-6), 2.2 mm × 1.35 mm × 1.0 mm body, 0.95 mm pitch, JEDEC MO-178 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 - GND FORCE	Ground return path for internal regulator	Connects to local ground plane; carries return current but not used for voltage sensing.
2 - GND SENSE	Reference ground potential sense point	Must connect directly to lowest-potential node (e.g., ADC REF–) to reject ground bounce errors.
3 - ENABLE	Digital control input for device activation	Active-high; pulls output to high-impedance state when <0.7 V, reducing IQ to 5 μA for power gating.
4 - VIN	Unregulated input supply connection	Accepts 2.3 V to 5.5 V; requires ≥0.1 V/ms slew rate to avoid turn-on overshoot.
5 - VOUT SENSE	Output voltage feedback sense point	Connects directly to load's reference input (e.g., ADC REF+) to compensate for trace IR drop.
6 - VOUT FORCE	Regulated output drive terminal	Delivers 2.048 V; must be routed separately from VOUT SENSE to maintain 4-wire integrity.

Key Features

Feature	Design Value
DigiTrim® digital trimming	Enables ±0.1% initial accuracy without analog trimming components or post-packaging calibration steps.
4-wire Kelvin sensing	GND SENSE and VOUT SENSE pins reduce effective output error to <10 ppm by eliminating PCB trace resistance impact.
Low-noise spectral density	0.9 μV/√Hz at 1 kHz - minimizes contribution to total integrated noise in precision sensor front-ends.
Industrial temperature range	−40°C to +125°C operation with guaranteed specs - supports deployment in motor drives and downhole tools.
Low dropout at light load	100 mV dropout at 0 mA - enables stable regulation even when VIN drops to 2.148 V, extending usable battery range.

Applications

High-Accuracy Data Acquisition	Portable Medical Instrumentation
Use Scenario: 24-bit delta-sigma ADC in automated test equipment measuring thermocouple or RTD signals with <0.005% linearity requirement. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core, providing stable 2.048 V reference with sub-ppm thermal drift. Use Value: Enables 120 dB SNR and <1 LSB INL error over full temperature range without recalibration.	Use Scenario: Battery-powered ECG monitor requiring 5-year shelf life and clinical-grade signal fidelity. IC Role / Device Role / Timing Role: Reference source for analog front-end PGA and ADC, operating in shutdown between heartbeat sampling intervals. Use Value: 5 μA shutdown current extends coin-cell lifetime; 15 μV_p-p noise prevents T-wave amplitude distortion.
Industrial Process Transmitters	Smart Sensor Nodes
Use Scenario: 4–20 mA loop-powered pressure transmitter installed in oil refinery environments (−40°C to +85°C). IC Role / Device Role / Timing Role: Precision reference for DAC generating loop current setpoint and internal diagnostics circuitry. Use Value: 8 ppm/°C tempco ensures <0.02% span error over ambient range; 30 ppm long-term stability avoids annual field recalibration.	Use Scenario: Wireless vibration sensor node with MEMS accelerometer and BLE radio, powered by primary lithium cell. IC Role / Device Role / Timing Role: Reference for low-power SAR ADC sampling at 1 kSPS during wake-up bursts. Use Value: 100 μA quiescent current enables >3-year operation on 2.4 Ah cell; 400 μs turn-on settling synchronizes cleanly with MCU wake-up timer.

High-Accuracy Data Acquisition

Portable Medical Instrumentation

Use Scenario: 24-bit delta-sigma ADC in automated test equipment measuring thermocouple or RTD signals with <0.005% linearity requirement.

IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core, providing stable 2.048 V reference with sub-ppm thermal drift.

Use Value: Enables 120 dB SNR and <1 LSB INL error over full temperature range without recalibration.

Use Scenario: Battery-powered ECG monitor requiring 5-year shelf life and clinical-grade signal fidelity.

IC Role / Device Role / Timing Role: Reference source for analog front-end PGA and ADC, operating in shutdown between heartbeat sampling intervals.

Use Value: 5 μA shutdown current extends coin-cell lifetime; 15 μV_p-p noise prevents T-wave amplitude distortion.

Industrial Process Transmitters

Smart Sensor Nodes

Use Scenario: 4–20 mA loop-powered pressure transmitter installed in oil refinery environments (−40°C to +85°C).

IC Role / Device Role / Timing Role: Precision reference for DAC generating loop current setpoint and internal diagnostics circuitry.

Use Value: 8 ppm/°C tempco ensures <0.02% span error over ambient range; 30 ppm long-term stability avoids annual field recalibration.

Use Scenario: Wireless vibration sensor node with MEMS accelerometer and BLE radio, powered by primary lithium cell.

IC Role / Device Role / Timing Role: Reference for low-power SAR ADC sampling at 1 kSPS during wake-up bursts.

Use Value: 100 μA quiescent current enables >3-year operation on 2.4 Ah cell; 400 μs turn-on settling synchronizes cleanly with MCU wake-up timer.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADR360ARTZ-REEL7	2.048 V output, ±0.06% initial accuracy, 3 ppm/°C tempco, higher cost, 8-lead SOT-23	Used where ultra-low drift dominates cost sensitivity; lacks enable pin and 4-wire sensing	Select ADR3420ARJZ-R7 when enable control, Kelvin sensing, and cost-constrained designs are required.
REF192GS	2.048 V output, ±0.1% initial accuracy, 10 ppm/°C tempco, 125 μA IQ, no enable, 8-lead SOIC	Preferred in legacy industrial PLC I/O modules with SOIC footprints and no need for shutdown	Choose ADR3420ARJZ-R7 for new SOT-23 designs needing lower IQ, enable functionality, and smaller footprint.

Compared with ADR360ARTZ-REEL7 and REF192GS, the ADR3420ARJZ-R7 uniquely combines enable control, 4-wire Kelvin architecture, and SOT-23 size at mid-tier accuracy-making it optimal for space- and power-constrained embedded systems requiring field-serviceable calibration stability.

Availability

ADR3420ARJZ-R7 is available at Aetrix Electronics and suitable for precision data acquisition systems, industrial instrumentation, and battery-powered devices requiring stable component supply with guaranteed long-term parametric consistency.

Supply support for ADR3420ARJZ-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADR34xx family was designed specifically for cost-sensitive, high-accuracy voltage reference needs in industrial and medical applications where micropower operation, wide temperature range, and Kelvin sensing are mandatory.

FAQ

What is the maximum input voltage rating for the ADR3420ARJZ-R7?

The ADR3420ARJZ-R7 has an absolute maximum supply voltage rating of 6 V. Operation above this level risks permanent damage. The recommended operating input voltage range is 2.3 V to 5.5 V, with minimum dropout maintained at 250 mV under 2 mA load at full temperature range.

Does the ADR3420ARJZ-R7 support 4-wire Kelvin connections, and how are they implemented?

Yes, the ADR3420ARJZ-R7 supports true 4-wire Kelvin connections via dedicated VOUT SENSE (Pin 5) and GND SENSE (Pin 2) terminals. These must be routed directly to the load's reference input and ground reference points-separate from the FORCE traces-to eliminate voltage drop errors in PCB traces or connectors.

What is the typical turn-on settling time for the ADR3420ARJZ-R7, and what conditions affect it?

The ADR3420ARJZ-R7 has a typical turn-on settling time of 400 μs under standard test conditions (C_IN = C_L = 0.1 μF, R_Load = 1 kΩ). Settling time increases with larger capacitive loads or lower input voltage margins; it is specified only for normal operation-not during enable wake-up from shutdown.

Can the ADR3420ARJZ-R7 sink current, and what is its maximum sink capability?

Yes, the ADR3420ARJZ-R7 can sink up to −3 mA while maintaining output accuracy. This bidirectional current capability allows it to actively pull down reference nodes during dynamic load transitions, improving transient response in systems with varying reference current demands.

How does the ADR3420ARJZ-R7 achieve ±0.1% initial accuracy without laser trimming?

The ADR3420ARJZ-R7 achieves ±0.1% initial accuracy using Analog Devices' proprietary DigiTrim® technology-a digital post-assembly trimming process that adjusts internal resistor ratios via one-time programmable memory, eliminating variability from analog trimming methods and enabling high yield in SOT-23 packaging.

ADR3420ARJZ-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Package/Case:: SOT-23-6

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Series

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 2.048V

Voltage - Output (Max):: -

Current - Output:: 10 mA

Tolerance:: ±0.1%

Temperature Coefficient:: 8ppm/°C

Noise - 0.1Hz to 10Hz:: 15µVp-p

Noise - 10Hz to 10kHz:: 38µVrms

Voltage - Input:: 2.3V ~ 5.5V

Current - Supply:: 100µA

Current - Cathode:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-6

ADR3420ARJZ-R7 FAQ

1.How can I place an order for ADR3420ARJZ-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADR3420ARJZ-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADR3420ARJZ-R7 reliable?

The price and inventory of ADR3420ARJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR3420ARJZ-R7 is usually 5 days.

3.What payment methods are accepted for ADR3420ARJZ-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR3420ARJZ-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADR3420ARJZ-R7?

ADR3420ARJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADR3420ARJZ-R7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADR3420ARJZ-R7?

For technical support, including ADR3420ARJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR3420ARJZ-R7 requirements.

6.How does Aetrix verify that ADR3420ARJZ-R7 is sourced from the original manufacturer or authorized distributors?

All ADR3420ARJZ-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADR3420ARJZ-R7 meets industry standards.

7.What is the process for return or replacement of ADR3420ARJZ-R7?

All ADR3420ARJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR3420ARJZ-R7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADR3420ARJZ-R7 part is unused and in its original packaging.

Return procedure for ADR3420ARJZ-R7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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