Analog Devices Inc. AD22103KRZ-RL

Overview

AD22103KRZ-RL from Analog Devices is a monolithic ratiometric voltage-output temperature sensor IC with integrated signal conditioning, operating from a single 3.3 V supply. It delivers a linear output of 0.25 V at 0°C to 3.05 V at +100°C, with ±2.5°C total error over temperature and 28 mV/°C temperature coefficient-designed for direct interface to microcontroller ADCs in thermal management systems.

For engineers reviewing the AD22103KRZ-RL datasheet, AD22103KRZ-RL pinout, AD22103KRZ-RL application, or AD22103KRZ-RL equivalent, key selection criteria include its ratiometric transfer function, SOIC-8 package, guaranteed 0°C to +100°C operating range, reverse supply protection, and low self-heating (<0.3°C in still air) for embedded thermal sensing where supply-referenced accuracy and minimal external components are critical.

Technical Context

The AD22103KRZ-RL implements a proprietary temperature-dependent resistor (RT) excited by a supply-proportional current source, generating a voltage that is both linear with temperature and ratiometric to VS. Its op amp-based signal conditioning applies fixed gain and offset to produce VOUT = (VS/3.3 V) × [0.25 V + (28 mV/°C) × TA], eliminating need for external trimming or linearization.

Its output stage uses a PNP emitter-follower sourcing structure with ~7 mA short-circuit capability and a fixed –100 µA pull-down sink, enabling robust interfacing to grounded loads like ADC inputs while limiting output current to <1 mA for optimal accuracy and minimal self-heating.

Key Specifications

Pinout & Package

AD22103KRZ-RL is housed in an 8-lead SOIC (SO-8) package with exposed pad not connected. Pin 1 is marked by notch or bevel; device orientation follows JEDEC MS-012 standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature sensing applications.

Compared with LM60BIM3X/NOPB and TSYS01-D00-100, the AD22103KRZ-RL uniquely combines ratiometric analog output, SOIC-8 compatibility, and factory-trimmed linearity to minimize component count and layout effort in 3.3 V microcontroller systems requiring moderate accuracy and rapid design turnaround.

Availability

AD22103KRZ-RL is available at Aetrix Electronics and suitable for microprocessor thermal management, battery-powered system monitoring, and power supply temperature monitoring requiring stable component supply, long-term lifecycle support, and consistent SOIC-8 packaging.

Supply support for AD22103KRZ-RL 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 is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD22103KRZ-RL belongs to Analog Devices' precision temperature sensor product line, engineered for cost-sensitive, supply-rail-referenced thermal sensing in 3.3 V embedded systems where simplicity, reliability, and minimal external components are essential.

FAQ

What is the operating temperature range of the AD22103KRZ-RL?

The AD22103KRZ-RL is guaranteed to operate from 0°C to +100°C, with specifications fully characterized across this range. Its output voltage spans 0.25 V at 0°C to 3.05 V at +100°C when powered from a nominal +3.3 V supply. The device remains functional outside this range but does not guarantee accuracy or linearity beyond the specified limits.

How does the ratiometric nature of the AD22103KRZ-RL benefit system design?

The AD22103KRZ-RL's ratiometric output-VOUT = (VS/3.3 V) × [0.25 V + (28 mV/°C) × TA]-means both the sensor and the ADC can share the same 3.3 V supply as their reference. This eliminates the need for a separate precision voltage reference IC, reduces component count, lowers cost, and improves immunity to supply rail variations-making the AD22103KRZ-RL ideal for resource-constrained microcontroller applications.

Can the AD22103KRZ-RL be used with supply voltages other than 3.3 V?

Yes, the AD22103KRZ-RL operates from +2.7 V to +3.6 V and functions ratiometrically at any voltage within that range. For example, at 5 V supply, its transfer function recalculates to VO = (VS/5 V) × [0.378 V + (42.42 mV/°C) × TA]. However, full specification compliance-including accuracy and output swing-is validated only at 3.3 V per the datasheet.

What is the maximum output current capability of the AD22103KRZ-RL?

The AD22103KRZ-RL output stage can source up to ~7 mA continuously and withstand indefinite short-circuit to ground or VS. However, for best accuracy and minimal self-heating, Analog Devices recommends limiting output current to <1 mA. Exceeding this increases junction temperature and introduces measurable error-especially critical in high-accuracy or thermally isolated applications.

Does the AD22103KRZ-RL require external calibration for typical applications?

No, the AD22103KRZ-RL features factory-trimmed gain and offset, delivering ±2.5°C total error over 0°C to +100°C without calibration. For applications demanding higher accuracy (e.g., <0.5°C), two-point calibration at 0°C and +100°C can remove offset and span errors-leaving only residual nonlinearity (~0.5°C) as the dominant error source in the AD22103KRZ-RL.