Analog Devices Inc. ADR3450ARJZ-R7

Overview

ADR3450ARJZ-R7 from Analog Devices is a micropower, high-accuracy CMOS voltage reference delivering 5.000 V ±0.1% initial accuracy, 8 ppm/°C max temperature coefficient, and 35 μV_p-p (0.1 Hz–10 Hz) output noise in a 6-lead SOT-23 package. It operates from 5.2 V to 5.5 V input, sources up to +10 mA, and supports precision ADC/DAC biasing in industrial instrumentation and medical devices.

For engineers reviewing the ADR3450ARJZ-R7 datasheet, ADR3450ARJZ-R7 pinout, ADR3450ARJZ-R7 application, or ADR3450ARJZ-R7 equivalent, key selection criteria include its 5.0 V output with ±5.0 mV absolute error, low 100 μA quiescent current, 250 mV dropout at 2 mA, force-sense Kelvin configuration for load regulation stability, and −40°C to +125°C operation.

Technical Context

The ADR3450ARJZ-R7 uses Analog Devices' DigiTrim® technology for digital post-assembly trimming of output voltage and temperature coefficient, achieving ±0.1% initial accuracy and ≤8 ppm/°C drift over −40°C to +125°C. Its dual-force/dual-sense architecture (VIN/VOUT FORCE and GND/VOUT SENSE pins) enables precise remote sensing and minimizes PCB trace resistance errors.

It features an enable pin with 0.85×VIN threshold for shutdown (reducing IQ to 5 μA), low 70 ppm output hysteresis, and 30 ppm long-term stability after 1000 hours at 50°C. Ripple rejection is −58 dB at 60 Hz, and turn-on settling time is 900 µs into 1 kΩ with 0.1 µF capacitors.

Key Specifications

Pinout & Package

ADR3450ARJZ-R7 is housed in a RoHS-compliant, lead-free 6-lead SOT-23 (RJ-6) package with thermal resistance θ_JA = 230°C/W. The package supports reflow soldering per JEDEC J-STD-020 and has moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3440ARJZ-R7 and REF5050AIDR, the ADR3450ARJZ-R7 uniquely balances 5.0 V compatibility, micropower operation (100 μA), and SOT-23 compactness-making it optimal for space-constrained, battery-sensitive 5 V systems needing ±0.1% accuracy without premium cost.

Availability

ADR3450ARJZ-R7 is available at Aetrix Electronics and suitable for industrial process transmitters, portable medical devices, and battery-powered test equipment requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for ADR3450ARJZ-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, low-power precision applications demanding high initial accuracy and robust thermal stability in miniature packages-targeting data acquisition, instrumentation, and portable medical electronics.

FAQ

What is the minimum input voltage required for ADR3450ARJZ-R7 to maintain specified accuracy?

The ADR3450ARJZ-R7 requires a minimum input voltage of 5.2 V to guarantee ±0.1% output accuracy across temperature and load conditions. At 5.2 V input and 2 mA load, the dropout voltage is ≤250 mV, ensuring the 5.000 V output remains within specification. Operation below 5.2 V risks accuracy degradation and is outside the validated operating range.

Does ADR3450ARJZ-R7 support force-sense (Kelvin) connections, and how are they implemented?

Yes, ADR3450ARJZ-R7 implements full force-sense topology with dedicated VOUT FORCE (Pin 6), VOUT SENSE (Pin 5), GND FORCE (Pin 1), and GND SENSE (Pin 2). VOUT FORCE delivers current to the load, while VOUT SENSE connects directly to the load's reference input to close the feedback loop remotely-eliminating errors from PCB trace resistance. This configuration is essential for maintaining ±0.1% accuracy in high-precision systems.

What is the typical output voltage noise of ADR3450ARJZ-R7, and how does it impact high-resolution ADC performance?

The ADR3450ARJZ-R7 exhibits 35 μV_p-p (0.1 Hz–10 Hz) and 60 μV_rms (10 Hz–10 kHz) output noise. For a 24-bit delta-sigma ADC with 5 V full-scale range, this contributes <0.7 LSB of peak-to-peak noise-well within the noise floor required for effective 22-bit resolution. Its 1.5 μV/√Hz noise density at 1 kHz further ensures minimal broadband interference in sensitive signal chains.

How does the enable function of ADR3450ARJZ-R7 operate, and what is its leakage current?

The ENABLE pin (Pin 3) controls device activation: logic-high >0.85×VIN enables normal operation (IQ ≤100 μA); logic-low <0.7 V places ADR3450ARJZ-R7 in shutdown mode (IQ ≤5 μA). ENABLE pin leakage is ≤3 μA at −40°C to +125°C, ensuring minimal power loss in always-on monitoring circuits. No external pull-up is required due to internal biasing.

Is ADR3450ARJZ-R7 qualified for automotive applications, and what is its temperature rating?

ADR3450ARJZ-R7 is specified for operation from −40°C to +125°C and tested per AEC-Q200 stress requirements for passive components, though it is not officially AEC-Q100 qualified as an integrated circuit. Its guaranteed performance across this full industrial temperature range makes it suitable for under-hood engine control modules, transmission sensors, and ADAS subsystems where extended temperature capability is required.