Texas Instruments TMP20AIDRLT

Overview

TMP20AIDRLT from Texas Instruments is a precision analog-output CMOS temperature sensor in SOT-563 (6-pin) package, delivering ±2.5°C accuracy across –55°C to +130°C, 4 µA max quiescent current, and –11.77 mV/°C output slope with 1.8639 V output at 0°C - used for thermal monitoring in space-constrained portable electronics.

For engineers reviewing the TMP20AIDRLT datasheet, TMP20AIDRLT pinout, TMP20AIDRLT application, or TMP20AIDRLT equivalent, key selection criteria include analog output linearity over wide temperature range, ultra-low power consumption enabling battery-operated use, SC70/SOT-563 package compatibility, and supply voltage operation down to 1.8 V at elevated temperatures.

Technical Context

The TMP20AIDRLT implements a parabolic transfer function VO = (–3.88×10⁻⁶×T²) + (–1.15×10⁻²×T) + 1.8639 V for precise temperature-to-voltage conversion across –55°C to +130°C. Its output is inversely proportional to temperature with no digital interface or internal ADC.

It operates in a single functional mode: analog voltage output. Shutdown occurs below 0.5 V supply, reducing current to <20 nA. Self-heating is limited to <0.01°C due to 4 µA max supply current and low thermal resistance (RθJB = 126.4°C/W in SOT-563).

Key Specifications

Pinout & Package

SOT-563 (DRL) 6-pin package: 1.60 mm × 1.20 mm body size, exposed pad not electrically connected, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM20BIM8 and TS2012-5.0TR, TMP20AIDRLT offers the optimal balance of ±2.5°C accuracy, 4 µA power, and SOT-563 footprint - making it the preferred choice for space-constrained, battery-sensitive thermal monitoring where pinout reuse is required.

Availability

TMP20AIDRLT is available at Aetrix Electronics and suitable for smartphone thermal management, notebook CPU throttling, and white goods compressor control requiring stable component supply across extended production lifecycles.

Supply support for TMP20AIDRLT 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 sensing, power management, and signal chain solutions.

The TMP20 series was designed specifically for ultra-low-power, high-accuracy analog temperature sensing in portable and space-constrained systems - emphasizing minimal self-heating, wide supply range, and robust thermal response.

FAQ

What is the operating temperature range of the TMP20AIDRLT?

The TMP20AIDRLT operates from –55°C to +130°C with supply voltages of 2.7 V to 5.5 V. At 1.8 V supply, operation is guaranteed from +15°C to +130°C. This dual-range capability makes TMP20AIDRLT suitable for both industrial enclosures and consumer electronics where low-voltage battery operation is required above 15°C.

Does the TMP20AIDRLT require external calibration for ±2.5°C accuracy?

No, the TMP20AIDRLT achieves ±2.5°C accuracy across –55°C to +130°C without external calibration. This specification is production-tested and assured by design. The device uses a trimmed parabolic transfer function that maintains this accuracy over its full operating range and supply voltage variation (1.8 V to 5.5 V), eliminating need for per-unit calibration in most applications.

How does the TMP20AIDRLT behave when supplied with less than 0.5 V?

When V+ drops below 0.5 V, the TMP20AIDRLT enters shutdown mode and draws less than 20 nA typical current. In this state, the output becomes high-impedance and undefined. This feature enables host MCU-controlled power gating to minimize system standby current - a key advantage in always-on thermal monitoring applications using TMP20AIDRLT.

Can the TMP20AIDRLT drive an ADC input directly without external components?

Yes, the TMP20AIDRLT can drive most microcontroller ADC inputs directly. Its output impedance is typically <1 Ω when sourcing and ~10 Ω when sinking current, and it supports up to 1 nF capacitive load. For high-speed sampling ADCs (e.g., MSP430), a small charge-reservoir capacitor (e.g., 10–100 nF) between VOUT and GND is recommended to prevent voltage sag during acquisition - a common practice confirmed in TI's TMP20AIDRLT application guidance.

What is the significance of Pins 2 and 5 being labeled "NC / GND" on the TMP20AIDRLT?

Pins 2 and 5 on the TMP20AIDRLT are internally connected to the silicon substrate flag and serve as the primary thermal conduction path from the die to the PCB. TI mandates connecting both pins to GND for optimal thermal response and electrical stability. Floating them is permitted only if grounding is impossible - but doing so risks EMI-induced measurement errors. Neither pin may be biased to any voltage other than GND, as specified in the TMP20AIDRLT layout guidelines.