Analog Devices Inc. ADR3650BRMZ-R7

Overview

ADR3650BRMZ-R7 from Analog Devices is a precision micropower voltage reference delivering 5.000 V ±0.04% initial accuracy, 3 ppm/°C max temperature coefficient (B grade), and 70 mA sourcing / 20 mA sinking output current in an 8-lead MSOP package. It operates from −40°C to +125°C with 0.15 V dropout at 10 mA and supports high-accuracy analog signal chains in portable instrumentation and remote sensors.

For engineers reviewing the ADR3650BRMZ-R7 datasheet, ADR3650BRMZ-R7 pinout, ADR3650BRMZ-R7 application, or ADR3650BRMZ-R7 equivalent, key selection criteria include its low 3 ppm/°C TC, 3 ppm p-p (0.1 Hz–10 Hz) output noise, 65 µA quiescent current, 1.5 µA shutdown current, and force-sense architecture enabling <15 ppm/mA load regulation up to 50 mA.

Technical Context

The ADR3650BRMZ-R7 implements a curvature-corrected bandgap core with DigiTrim® production trimming for factory-set accuracy and stability. Its force-sense topology separates VOUT FORCE and VOUT SENSE pins to eliminate IR drop errors in high-precision ADC/DAC biasing and sensor excitation circuits.

It integrates enable-controlled shutdown (VENH = 1.17 V, VENL = 0.63 V), thermal shutdown at 178°C with 3°C hysteresis, and current limiting (90 mA short-circuit source). The device requires ≥0.1 µF output capacitance and supports input voltages up to 16 V with 60 dB ripple rejection at 60 Hz.

Key Specifications

Pinout & Package

Package: 8-Lead MSOP (RM-8), 3.0 mm × 3.0 mm × 1.0 mm, exposed pad for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3650BRMZ-R7, the ADR3650ARMZ-R7 trades tighter initial accuracy and TC for lower cost, while REF5050AIDR offers similar precision but lacks force-sense architecture and current drive-making it unsuitable for applications requiring >10 mA load or sub-ppm/mA regulation.

Availability

ADR3650BRMZ-R7 is available at Aetrix Electronics and suitable for portable instrumentation, remote sensors, and process transmitters requiring stable component supply with guaranteed long-term calibration integrity and extended temperature operation.

Supply support for ADR3650BRMZ-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 for industrial, automotive, communications, and healthcare markets.

The ADR36xx family targets high-accuracy, low-power, high-output-current voltage references for next-generation portable and ruggedized measurement systems where traditional references fail under thermal or load stress.

FAQ

What is the maximum load current the ADR3650BRMZ-R7 can source while maintaining regulation?

The ADR3650BRMZ-R7 can continuously source up to 70 mA while maintaining output regulation within specifications. At 50 mA sourcing, dropout remains ≤0.9 V and load regulation is specified at 3 ppm/mA. Short-circuit current to ground is rated at 90 mA typical, with thermal shutdown activating above 178°C junction temperature to protect the device.

Does the ADR3650BRMZ-R7 require external capacitors, and what values are recommended?

Yes, the ADR3650BRMZ-R7 requires a minimum 0.1 µF ceramic capacitor on the output (VOUT SENSE) for stability, with up to 10 µF supported. An input capacitor of 1 µF–10 µF (plus 0.1 µF ceramic in parallel) is recommended to improve line transient response and suppress supply noise. These values are validated per the datasheet's Applications Information section and Figure 68.

How does the force-sense architecture of the ADR3650BRMZ-R7 improve system accuracy?

The ADR3650BRMZ-R7 uses separate VOUT FORCE and VOUT SENSE pins to decouple high-current output delivery from precision voltage sensing. By routing VOUT SENSE directly to the load's reference input (e.g., ADC REF+), it eliminates voltage drop across PCB traces or interconnects-reducing gain error by up to 0.1% in 5 V systems with 100 mΩ trace resistance.

What is the long-term drift specification for the ADR3650BRMZ-R7, and how is it measured?

The ADR3650BRMZ-R7 exhibits 160 ppm long-term drift after 3500 hours of operation at 25°C and 30% relative humidity, as measured per JEDEC JESD22-A117. Units were soldered onto FR4 PCBs using standard reflow profiles-not socketed-to replicate real-world stress. Early-life drift dominates: 90 ppm occurs in the first 250 hours, and 140 ppm by 1000 hours.

Can the ADR3650BRMZ-R7 operate from a 3.3 V supply?

No-the ADR3650BRMZ-R7 requires a minimum input voltage of VOUT + VDO = 5.0 V + 0.15 V = 5.15 V for regulation at 10 mA. At 50 mA, dropout rises to 0.9 V, requiring ≥5.9 V input. A 3.3 V supply is insufficient; use ADR3630 (3.0 V output) or ADR3625 (2.5 V output) for lower-voltage systems.