Texas Instruments TMP235AEDCKTQ1

Overview

TMP235AEDCKTQ1 from Texas Instruments is an AEC-Q100 Grade 0 automotive-qualified analog-output temperature sensor in a 5-pin SC70 package, delivering ±2.5°C max accuracy across –40°C to +150°C, 10 mV/°C gain with 500 mV offset at 0°C, and operates from 2.3 V to 5.5 V supply - used for engine bay thermal monitoring in gasoline powertrain systems.

For engineers reviewing the TMP235AEDCKTQ1 datasheet, TMP235AEDCKTQ1 pinout, TMP235AEDCKTQ1 application, or TMP235AEDCKTQ1 equivalent, this page delivers verified functional context, package-specific electrical behavior, automotive-grade reliability data, and real-world ADC interface guidance - all confirmed for the exact SC70-packaged TMP235AEDCKTQ1 variant.

Technical Context

The TMP235AEDCKTQ1 implements a precision CMOS bandgap-based temperature sensing core with class-AB output driver, enabling direct drive of ADC sample-and-hold inputs up to 1000 pF capacitive load. Its piecewise-linear transfer function uses three temperature segments (–40°C to 100°C, 100°C to 125°C, 125°C to 150°C) with distinct gain and offset values per segment to maintain ±2.5°C accuracy over full range.

It features short-circuit protected output, 9 µA typical quiescent current, and 800 µs typical power-on time - supporting low-duty-cycle power cycling in battery-sensitive automotive modules. Line regulation is ±0.1 °C/V, and output impedance remains ≤50 Ω at 500 Hz for stable signal integrity into high-speed sampling circuits.

Key Specifications

Pinout & Package

Package: 5-pin SC70 (DCK), body size 2.00 mm × 1.25 mm, moisture sensitivity level (MSL) Level-2-260°C-1 year, RoHS-compliant NIPDAUAG finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMT87QDBVRQ1 and LM50QIMRQ1, the TMP235AEDCKTQ1 uniquely combines Grade 0 150°C operation, ±2.5°C accuracy, and 5-pin SC70 compatibility - making it the only option among the three qualified for under-hood gasoline engine thermal sensing without layout change or accuracy trade-off.

Availability

TMP235AEDCKTQ1 is available at Aetrix Electronics and suitable for automotive head unit thermal management, electric power steering motor monitoring, and gasoline engine coolant sensing requiring stable component supply across multi-year vehicle production cycles.

Supply support for TMP235AEDCKTQ1 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 automotive-grade precision analog sensors and power management ICs.

The TMP23x-Q1 product line was designed specifically for AEC-Q100-compliant automotive thermal sensing - targeting engine, transmission, battery, and infotainment subsystems where high accuracy, low power, and robust packaging are mandatory.

FAQ

What is the maximum operating temperature of the TMP235AEDCKTQ1?

The TMP235AEDCKTQ1 is AEC-Q100 Grade 0 qualified with a maximum operating temperature of +150°C. This rating is validated across the full SC70 package and applies to continuous operation in engine bay environments. The device maintains ±2.5°C accuracy up to this limit, as specified in the electrical characteristics table under "Temperature accuracy" for –40°C to +150°C conditions.

Does the TMP235AEDCKTQ1 require external calibration for automotive use?

No, the TMP235AEDCKTQ1 does not require external calibration for standard automotive applications. It achieves ±2.5°C maximum accuracy over –40°C to +150°C without user trimming, and its piecewise-linear transfer function is factory-characterized. Calibration is only needed if system-level accuracy tighter than ±2.5°C is required - in which case two-point calibration using the documented inflection points (0°C, 100°C, 125°C) is recommended.

Can the TMP235AEDCKTQ1 drive a 10-bit ADC with 3.3 V reference directly?

Yes, the TMP235AEDCKTQ1 can drive a 10-bit ADC with 3.3 V reference directly. With 10 mV/°C gain and 500 mV offset, its output spans 100 mV to 2000 mV across –40°C to +150°C - covering 60.6% of the 3.3 V full scale. Its 500 µA output current and ≤50 Ω impedance at 500 Hz ensure <0.5 LSB settling error into typical SAR ADC input capacitances up to 1000 pF, as verified in Figure 6-5 and Section 8.2.1.

What is the purpose of the two NC pins on the TMP235AEDCKTQ1 SC70 package?

The two NC (no-connect) pins on the TMP235AEDCKTQ1 SC70 package - Pin 1 and Pin 5 - have no internal connection to the die. They may be left floating or tied to GND for mechanical stability or EMI reduction, but they serve no electrical function. This design allows pinout compatibility with other SC70 temperature sensors while accommodating internal routing constraints of the TMP235-Q1 die.

How does the TMP235AEDCKTQ1 handle power supply noise in automotive environments?

The TMP235AEDCKTQ1 handles power supply noise via built-in PSRR of –50 dB typical (as inferred from Δ°C/ΔVDD = ±0.1 °C/V) and strong internal regulation. TI recommends adding a 0.1 µF ceramic capacitor and optional 100 Ω series resistor between the external supply and VDD pin - especially in noisy 12 V rail-derived 3.3 V domains - to attenuate high-frequency ripple before it modulates the bandgap reference and output stage.