Analog Devices Inc. AD22100ARZ-RL

Overview

AD22100ARZ-RL from Analog Devices is a monolithic ratiometric voltage-output temperature sensor IC with integrated signal conditioning, operating over −50°C to +150°C. It delivers 22.5 mV/°C temperature coefficient, ±2.0°C total error over temperature, and 0.25 V to 4.75 V output swing with +5.0 V supply - enabling direct interface to microcontroller ADCs in HVAC and industrial board-level sensing.

For engineers reviewing the AD22100ARZ-RL datasheet, AD22100ARZ-RL pinout, AD22100ARZ-RL application, or AD22100ARZ-RL equivalent, this device offers ratiometric operation eliminating external reference needs, reverse voltage protection, minimal self-heating (≤0.4°C in still air), and SOIC-8 packaging for automated assembly in embedded thermal monitoring systems.

Technical Context

The AD22100ARZ-RL implements a proprietary on-die temperature-dependent resistor excited by a supply-proportional current source, generating a voltage linearly proportional to both temperature and V+. Its op amp-based signal conditioning applies fixed gain and offset to realize the transfer function VOUT = (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA].

This architecture enables true ratiometric behavior: output scaling tracks supply variations within ±1% ratiometricity error across 4 V–6.5 V, while its PNP-based output stage sources up to 7 mA but sinks only ~80 µA - requiring grounded loads and limiting drive capability to ≤1 mA for optimal accuracy and thermal stability.

Key Specifications

Pinout & Package

AD22100ARZ-RL is supplied in an 8-lead SOIC package (JEDEC MS-012AA, R-8 outline) with Pb-free finish (Z suffix). Pin 1 = V+, Pin 2 = VO, Pin 4 = GND; Pins 3, 5–8 are no-connect.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-output temperature sensor applications.

Compared with LM35DZ and TSYS01, the AD22100ARZ-RL uniquely combines wide −50°C to +150°C operation, ratiometric analog output, reverse voltage protection, and SOIC-8 packaging - making it optimal for cost-sensitive, high-reliability analog thermal monitoring where supply rail sharing with ADC is preferred.

Availability

AD22100ARZ-RL is available at Aetrix Electronics and suitable for HVAC systems, industrial process control, and board-level temperature sensing requiring stable component supply and RoHS-compliant packaging.

Supply support for AD22100ARZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD22100 product line was designed specifically for high-accuracy, single-supply, ratiometric temperature measurement in industrial, automotive, and instrumentation environments - prioritizing system-level cost reduction through integrated signal conditioning.

FAQ

What is the guaranteed operating temperature range for AD22100ARZ-RL?

The AD22100ARZ-RL is specified for guaranteed operation from −50°C to +150°C, with full performance including ±2.0°C total error and 22.5 mV/°C coefficient maintained across this entire range. This exceeds the −40°C to +85°C range of the AD22100AR variant, confirming AD22100ARZ-RL's qualification for harsh thermal environments such as engine bay monitoring or industrial oven control.

How does the ratiometric nature of AD22100ARZ-RL simplify ADC interfacing?

The AD22100ARZ-RL's output scales proportionally with its supply voltage (V+), allowing it to share the same +5 V rail used as the reference for an analog-to-digital converter. This eliminates the need for a separate precision voltage reference, reducing component count, PCB area, and system cost - a key advantage confirmed in Figure 2 of the AD22100 datasheet for direct ADC input connection.

What is the maximum output current capability of AD22100ARZ-RL?

The AD22100ARZ-RL can source up to 7 mA from its VO pin but only sinks approximately 80 µA. Therefore, it is designed to drive grounded loads - such as the input impedance of a microcontroller ADC - and should not be used to drive loads referenced to V+. For best accuracy and minimal self-heating, output current should be kept below 1 mA, as stated in the Output Stage Considerations section of the datasheet.

Does AD22100ARZ-RL require external calibration for typical applications?

No, the AD22100ARZ-RL does not require external calibration for most applications because its on-chip signal conditioning provides factory-trimmed gain and offset. The device achieves ±2.0°C total error over temperature without trimming, and its 1.0% FS nonlinearity means residual error after offset/span correction remains under 2.0°C - sufficient for HVAC, thermostats, and industrial monitoring per the Applications section.

What package type and lead finish does AD22100ARZ-RL use?

The AD22100ARZ-RL uses an 8-lead SOIC package (JEDEC MS-012AA, R-8 outline) with Pb-free (RoHS-compliant) finish, indicated by the "Z" suffix in the part number. This package supports automated surface-mount assembly and reflow soldering, and its pinout - V+ (Pin 1), VO (Pin 2), NC (Pin 3), GND (Pin 4), NC (Pins 5–8) - is fully documented in Table 5 of the AD22100 Rev. D datasheet.