Analog Devices Inc. AD22103KR-REEL

Overview

AD22103KR-REEL from Analog Devices is a ratiometric voltage-output silicon temperature sensor IC in SOIC-8 package, delivering 0.25 V at 0°C and 3.05 V at +100°C with ±0.75°C total error over 0°C to +100°C, 28 mV/°C temperature coefficient (ratiometric to supply), and 350–600 µA quiescent current - used for precision ambient and surface temperature monitoring in microcontroller-based systems.

For engineers reviewing the AD22103KR-REEL datasheet, AD22103KR-REEL pinout, AD22103KR-REEL application, or AD22103KR-REEL equivalent, key selection criteria include ratiometric operation with 2.7–3.6 V supply, guaranteed 0°C to +100°C accuracy, SOIC-8 thermal response time (~3.5 s in moving air), and compatibility with 8-bit ADCs using shared supply as reference.

Technical Context

The AD22103KR-REEL integrates a proprietary temperature-dependent resistor excited by a supply-proportional current source, enabling linear output voltage scaling with ambient temperature. Its op amp signal conditioning block implements the precise transfer function V_OUT = (V_S/3.3 V) × [0.25 V + (28 mV/°C) × T_A].

Output stage uses a PNP emitter-follower sourcing structure with fixed ~100 µA pull-down sink; it drives grounded loads only, supports indefinite short-circuit to GND or V_S, and requires output current ≤1 mA for minimal self-heating and optimal accuracy.

Key Specifications

Pinout & Package

AD22103KR-REEL is housed in an 8-lead SOIC (SO-8) package with standard 1.27 mm pitch. Pin 1 is marked via notch or bevel; pins 2–4 and 6–7 are NC (no connect); functional terminals are VS (Pin 8), VO (Pin 6), and GND (Pin 5).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ratiometric analog temperature sensor applications.

Compared with LM35DR and TSYS01, the AD22103KR-REEL uniquely balances ratiometric simplicity, SOIC-8 manufacturability, and guaranteed ±0.75°C error over 0°C–100°C - making it optimal for cost-sensitive, supply-varying embedded systems where analog ADC integration is preferred.

Availability

AD22103KR-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, consumer appliance control, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.

Supply support for AD22103KR-REEL 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD22103KR-REEL belongs to Analog Devices' precision analog temperature sensor product line, engineered specifically for ratiometric, low-cost, single-supply temperature measurement in microcontroller-based systems without external references.

FAQ

What is the guaranteed temperature accuracy of the AD22103KR-REEL over its full operating range?

The AD22103KR-REEL guarantees ±0.75°C total error over the 0°C to +100°C operating temperature range, including initial offset, span, and nonlinearity contributions. This specification is validated per Analog Devices' datasheet Rev. 0 and applies to all units shipped in SOIC-8 packaging under standard test conditions (V_S = 3.3 V, T_A = 0°C to +100°C). The AD22103KR-REEL achieves this performance without calibration, though system-level offset/gain trimming can further reduce residual error.

Can the AD22103KR-REEL operate from a 5 V supply, and how does that affect its output?

Yes, the AD22103KR-REEL can operate from a 5 V supply, and its ratiometric architecture automatically scales the output: V_OUT = (5 V / 3.3 V) × [0.25 V + (28 mV/°C) × T_A] = 0.378 V + 42.42 mV/°C × T_A. This preserves linearity and proportionality, but users must verify that the resulting output (e.g., 4.62 V at +100°C) remains within the downstream ADC's input range. The AD22103KR-REEL draws up to 600 µA at 5 V, staying within safe power limits.

Why does the AD22103KR-REEL have four no-connect (NC) pins in its SOIC-8 package?

The AD22103KR-REEL uses a standardized SOIC-8 die pad layout where only three pins (VS, VO, GND) are electrically active; Pins 1, 2, 3, and 7 are internally unconnected to simplify wafer-level testing and accommodate multiple variants (e.g., AD22103KT in TO-92) on the same leadframe. These NC pins must remain unconnected in PCB layout - tying them to GND or V_S may introduce noise coupling or violate internal isolation. The AD22103KR-REEL datasheet explicitly defines their status as "No Connect" in the PIN DESCRIPTION table.

How does the AD22103KR-REEL handle short-circuit conditions on its output pin?

The AD22103KR-REEL output stage features a PNP emitter-follower sourcing structure with a fixed ~100 µA pull-down sink, enabling indefinite short-circuit tolerance to either GND or V_S without damage or latch-up. During a short to GND, the device safely sources up to ~7 mA peak current; during a short to V_S, the weak sink limits current to <100 µA. This fault resilience is confirmed in the Absolute Maximum Ratings table and makes the AD22103KR-REEL suitable for harsh environments where wiring faults may occur.

Is the AD22103KR-REEL compatible with AEC-Q200 for automotive use?

The AD22103KR-REEL is not officially AEC-Q200 qualified; however, its SOIC-8 package, guaranteed operation from 0°C to +100°C, and robust construction (including 4000 V HBM ESD rating and indefinite short-circuit tolerance) enable successful deployment in non-safety-critical automotive cabin climate systems. For AEC-Q200–mandated applications, Analog Devices offers the automotive-grade ADT7410 or ADT7310 series. The AD22103KR-REEL remains appropriate for cost-driven Tier 2 automotive subsystems where formal qualification is not contractually required.