Analog Devices Inc. AD592ANZ

Overview

AD592ANZ from Analog Devices is a two-terminal monolithic IC temperature transducer delivering 1 µA/K current output proportional to absolute temperature (Kelvin), with ±2.5°C max calibration error at +25°C, ±3.5°C max total error over –25°C to +105°C, and single-supply operation from +4 V to +30 V. It serves as a direct replacement for thermistors and RTDs in HVAC sensor nodes and industrial temperature monitoring circuits.

For engineers reviewing the AD592ANZ datasheet, AD592ANZ pinout, AD592ANZ application, or AD592ANZ equivalent, key selection criteria include its current-output immunity to voltage drop over long cables, laser-trimmed scale factor accuracy, supply rejection of ≤0.5°C/V below +5 V, and TO-92 package compatibility with through-hole thermal mounting.

Technical Context

The AD592ANZ implements a PTAT (Proportional-To-Absolute-Temperature) current source using matched silicon transistor pairs and laser-trimmed thin-film resistors to achieve 1 µA/K scaling. Its two-terminal architecture eliminates need for excitation circuitry or cold-junction compensation.

It operates as a high-impedance current source across 4–30 V supply range, with self-heating error ≤0.2°C in still air at +25°C/5 V, and exhibits ≤0.25°C nonlinearity over –25°C to +105°C due to best-fit line deviation - a parameter fully characterized and tested per unit at +105°C.

Key Specifications

Pinout & Package

AD592ANZ is housed in a 3-pin plastic TO-92 package (JEDEC TO-226-AA, package option T-3-1), with leads designed for through-hole mounting and thermal conduction via Kovar leads. Pin 2 is NC (no connection) and may be left unattached; polarity-sensitive operation requires correct (+) and (–) terminal orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM35DH/NOPB and TSIC506-200, the AD592ANZ uniquely delivers analog current output with inherent noise immunity, wide supply range, and proven long-term stability - making it optimal for rugged industrial and remote sensing where analog simplicity and reliability outweigh digital convenience.

Availability

AD592ANZ is available at Aetrix Electronics and suitable for HVAC system monitoring, industrial board-level diagnostics, and appliance temperature sensing requiring stable component supply across multi-year production cycles.

Supply support for AD592ANZ 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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD592 product line delivers monolithic two-terminal temperature transducers optimized for cost-sensitive, high-reliability industrial and consumer sensing - prioritizing current-output robustness, supply flexibility, and long-term calibration stability.

FAQ

What is the maximum operating temperature range specified for the AD592ANZ?

The AD592ANZ is specified for operation from –25°C to +105°C. While the TO-92 package itself is rated from –45°C to +125°C, performance parameters including accuracy, nonlinearity, and repeatability are guaranteed only within the –25°C to +105°C range. Operation outside this range may yield uncharacterized error but will not damage the device.

Does the AD592ANZ require external calibration to meet its datasheet accuracy specifications?

No - the AD592ANZ is factory-calibrated and meets its ±2.5°C max calibration error at +25°C and ±3.5°C max total error over –25°C to +105°C without user calibration. External trimming (e.g., single-point resistor adjustment) can improve accuracy further but is optional and not required for baseline specification compliance.

Can Pin 2 of the AD592ANZ be used as a ground connection or tied to circuit common?

No - Pin 2 of the AD592ANZ is explicitly designated NC (no connection) in the datasheet and internal die layout. It must remain unconnected or clipped; tying it to ground, supply, or any other node may disrupt internal biasing and invalidate all specifications. The device functions correctly with only Pins 1 (+) and 3 (–) connected.

How does the AD592ANZ handle supply voltage variations, and what is its power supply rejection ratio?

The AD592ANZ exhibits graded power supply rejection: ≤0.5°C/V for +4 V to +5 V, ≤0.2°C/V for +5 V to +15 V, and ≤0.1°C/V for +15 V to +30 V. This means output current remains stable despite ripple or drift - e.g., a 1 V ripple on a +12 V supply introduces ≤0.2°C equivalent temperature error, eliminating need for local regulation in most applications.

Is the AD592ANZ compatible with standard 4–20 mA industrial current loop systems?

No - the AD592ANZ outputs 1 µA/K (e.g., ~300 µA at room temperature), which is incompatible with 4–20 mA loop standards. To interface with such systems, external amplification and offset circuitry (e.g., op-amp-based transmitter as shown in Figure 12 of the datasheet) is required to scale and shift the output into the 4–20 mA range.