Analog Devices Inc. ADR02AKS-R2

Overview

ADR02AKS-R2 from Analog Devices is a precision 5.0 V band gap voltage reference in a 5-lead SC70 package, featuring ±0.1% initial accuracy, 9 ppm/°C max temperature coefficient (A grade), 10 µV p-p low-frequency noise (0.1 Hz to 10 Hz), 10 mA output current, and operation from 7.0 V to 36.0 V supply. It serves as a stable excitation source in high-resolution ADCs and precision sensor signal chains for industrial process control.

For engineers reviewing the ADR02AKS-R2 datasheet, ADR02AKS-R2 pinout, ADR02AKS-R2 application, or ADR02AKS-R2 equivalent, key selection considerations include its ultracompact SC70 footprint, integrated TEMP pin for temperature monitoring, TRIM pin for output calibration, and qualification for extended industrial temperature range (−40°C to +125°C).

Technical Context

The ADR02AKS-R2 implements a laser-trimmed band gap core with on-chip temperature compensation and a buffered output stage, enabling stable 5.0 V reference generation across wide input voltage (7–36 V) and load (0–10 mA) variations. Its TEMP pin delivers a ratiometric 550 mV baseline with 1.96 mV/°C sensitivity for external temperature sensing.

It requires no external capacitor for stability, supports fast 4 µs turn-on settling, and maintains <70 ppm/mA load regulation and <30 ppm/V line regulation over −40°C to +125°C - critical for precision data acquisition systems where reference drift directly impacts measurement fidelity.

Key Specifications

Pinout & Package

ADR02AKS-R2 is housed in a 5-lead SC70 (KS-5) surface-mount package (2.0 mm × 1.25 mm × 0.9 mm), optimized for space-constrained PCB layouts. Pin 1 is marked by a dot; pin numbering follows standard SC70 orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR02ARZ-REEL7 and REF5050AIDR, the ADR02AKS-R2 trades marginal tempco and noise performance for decisive advantages in miniaturization (SC70 vs. SOIC-8), capacitor-free operation, and compatibility with high-density portable or modular designs - making it optimal where board space and component count are critical.

Availability

ADR02AKS-R2 is available at Aetrix Electronics and suitable for industrial process control, precision data acquisition, and auto battery monitoring requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for ADR02AKS-R2 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 ADR02AKS-R2 belongs to the ADR0x family of precision voltage references designed specifically for space-constrained, high-accuracy applications demanding low drift, low noise, and wide supply tolerance - especially in industrial and automotive environments.

FAQ

What is the maximum operating temperature range for the ADR02AKS-R2?

The ADR02AKS-R2 is specified over the extended industrial temperature range of −40°C to +125°C. This rating applies to all grades (A/B/C) in the 5-lead SC70 package and is validated per AEC-Q100 for automotive-grade A versions, ensuring reliable operation in under-hood or factory-floor environments where thermal stress is significant. The ADR02AKS-R2 maintains its full electrical specifications across this entire range.

Does the ADR02AKS-R2 require an external output capacitor for stability?

No, the ADR02AKS-R2 is internally compensated and operates stably with 0 nF output capacitance. This eliminates the need for external capacitors, reducing BOM cost, PCB area, and potential instability risks from capacitor ESR or aging. Unlike many competing references (e.g., REF5050), the ADR02AKS-R2 guarantees stability across its full load and temperature range without any external components.

How is the TEMP pin on the ADR02AKS-R2 used in practice?

The TEMP pin on the ADR02AKS-R2 outputs a calibrated voltage of 550 mV at 25°C with a linear temperature coefficient of 1.96 mV/°C. In practice, it is connected to an ADC input to enable on-board temperature monitoring or used in software-based thermal compensation algorithms - for example, correcting sensor offset drift in precision pressure transducers. No external circuitry is needed beyond a simple voltage divider if scaling is required.

What is the purpose of the TRIM pin on the ADR02AKS-R2?

The TRIM pin on the ADR02AKS-R2 allows fine adjustment of the output voltage within ±0.5% of nominal 5.0 V using an external resistor network. It is typically connected between VOUT and GND through two resistors, forming a feedback divider that adjusts the internal reference node. This enables system-level calibration to compensate for PCB trace resistance, ADC gain error, or sensor nonlinearity - without requiring a higher-accuracy (and more expensive) reference part.

Can the ADR02AKS-R2 replace the REF02 in existing designs?

The ADR02AKS-R2 is not a direct pin-compatible replacement for the REF02 due to differing pinouts: REF02 uses an 8-pin DIP/SOIC configuration, while ADR02AKS-R2 uses a 5-pin SC70. However, the ADR02ARZ-REEL7 (SOIC-8 version) is explicitly designed as a drop-in replacement for REF02, sharing identical pin mapping and adding the TEMP function. For new designs prioritizing miniaturization, the ADR02AKS-R2 offers superior density but requires layout adaptation.