Texas Instruments TMP235A2DBZR

Overview

TMP235A2DBZR from Texas Instruments is a precision analog-output temperature sensor in a 3-pin SOT-23 package, delivering ±0.5°C typical accuracy from –40°C to +150°C, 10 mV/°C positive-slope output with 500 mV offset at 0°C, and ultra-low 9 µA quiescent current - enabling high-accuracy thermal monitoring in space-constrained industrial and automotive systems.

For engineers reviewing the TMP235A2DBZR datasheet, TMP235A2DBZR pinout, TMP235A2DBZR application, or TMP235A2DBZR equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and confirmed alternative options for analog temperature sensing where low power, wide temperature range, and direct ADC interface capability are critical.

Technical Context

The TMP235A2DBZR implements a CMOS-based linear analog temperature transducer with a piecewise-linear transfer function optimized for ±0.5°C typical accuracy across –40°C to +150°C. Its output voltage scales at 10 mV/°C with 500 mV offset at 0°C, and uses a class-AB output driver capable of sourcing up to 500 µA into capacitive loads ≤1000 pF.

It operates from 2.3 V to 5.5 V supply, achieves 800 µs power-on settling time to ±0.5°C accuracy, and features short-circuit protected output with <0.1 °C/V line regulation. Thermal self-heating is mitigated by low 9 µA quiescent current and R_θJA = 167 °C/W in the SOT-23 (DBZ) package.

Key Specifications

Pinout & Package

Package: 3-pin SOT-23 (DBZ), body size 2.92 mm × 1.30 mm, surface-mount, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMT86DBVR and LM73CIMK-0, the TMP235A2DBZR uniquely balances ultra-low power (9 µA), wide supply range (2.3–5.5 V), and true analog output - making it optimal for cost-sensitive, space-constrained analog-sensing nodes where ADC resources are available but digital bus overhead is undesirable.

Availability

TMP235A2DBZR is available at Aetrix Electronics and suitable for industrial motor control, automotive infotainment, and grid infrastructure monitoring requiring stable component supply across extended product lifecycles.

Supply support for TMP235A2DBZR 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

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade signal conditioning solutions.

The TMP23x product line was designed specifically for high-accuracy, low-power analog temperature sensing in harsh environments - targeting applications where thermistor replacement, simplified ADC interfacing, and long-term stability are essential design requirements.

FAQ

What is the operating temperature range of the TMP235A2DBZR?

The TMP235A2DBZR operates from –40°C to +150°C with ±0.5°C typical accuracy across that full range. Its specified accuracy holds under recommended conditions: 2.3 V to 5.5 V supply, no DC load, and ambient temperatures within the operating free-air range. The device maintains functional integrity up to +150°C junction temperature, supported by its SOT-23 thermal resistance of 167 °C/W.

Does the TMP235A2DBZR require external calibration?

No, the TMP235A2DBZR does not require external calibration to achieve its ±0.5°C typical accuracy specification. It is factory-trimmed for offset and gain, and its piecewise-linear transfer function is characterized across –40°C to +150°C. For highest precision, TI recommends using the provided piecewise coefficients (T_INFL, TC, V_OFFS) rather than assuming ideal linearity above 100°C - but no user calibration is needed for standard applications.

Can the TMP235A2DBZR drive an ADC input directly?

Yes, the TMP235A2DBZR can drive an ADC input directly. Its class-AB output driver supports up to 1000 pF capacitive load and delivers 500 µA maximum output current - sufficient to charge typical SAR ADC sampling capacitors without external buffering. TI recommends limiting total C_LOAD (including C_FILTER, C_MUX, and C_SAMPLE) to ≤1000 pF and placing any filter capacitor close to the ADC input for optimal performance.

What is the supply voltage rejection behavior of the TMP235A2DBZR?

The TMP235A2DBZR exhibits excellent supply voltage rejection: line regulation is specified at ±0.1 °C/V across –40°C to +150°C. This means a 1 V change in VDD introduces less than ±0.1°C error in the temperature reading - critical for systems with unregulated or noisy power rails. The low 9 µA quiescent current further minimizes supply-induced thermal self-heating effects.

Is the TMP235A2DBZR pin-compatible with other temperature sensors?

The TMP235A2DBZR in SOT-23 (DBZ) package is footprint-compatible with industry-standard LMT8x-Q1 and LM20 temperature sensors, sharing identical 3-pin layout (VDD–VOUT–GND). However, electrical characteristics differ: LM20 offers lower accuracy (±2°C) and different output slope (10 mV/°C but 0 V at –55°C), while LMT8x-Q1 has higher gain and automotive qualification. Direct substitution requires validation of accuracy, supply range, and output voltage alignment.