Texas Instruments TMP110D1IDPWR

Overview

TMP110D1IDPWR from Texas Instruments is an ultra-small, ±1.0°C accurate I²C digital temperature sensor in a 5-pin X2SON package (0.8 mm × 0.8 mm × 0.4 mm), designed for cost-sensitive thermal monitoring in space-constrained systems. It delivers 12-bit resolution (0.0625°C LSB), operates from 1.14 V to 5.5 V, and supports -40°C to 125°C ambient range - enabling use in SSD thermal throttling, industrial PC CPU monitoring, and video doorbell occupancy sensing.

For engineers reviewing the TMP110D1IDPWR datasheet, TMP110D1IDPWR pinout, TMP110D1IDPWR application, or TMP110D1IDPWR equivalent, key selection considerations include its ALERT pin variant (open-drain output), software compatibility with TMP102/TMP112, low 3.2 µA average current at 1 Hz, and I³C Mixed Bus co-existence capability.

Technical Context

The TMP110D1IDPWR implements a factory-calibrated bandgap-based temperature sensor core with a 12-bit SAR ADC, delivering stable ±1.0°C accuracy across -40°C to 125°C when V+ ≥ 1.4 V. Its digital core supports both continuous-conversion and one-shot modes, with programmable conversion rates (1–8 Hz) and configurable alert thresholds via THigh_Limit/TLow_Limit registers.

It features dual-mode alert functionality (comparator or alert mode), SMBus/I²C timing compliance up to 1 MHz (Fast Mode Plus), and a flexible 5th pin dedicated as ALERT (not address-selectable), distinguishing it from TMP110D variants. The device uses Q4 fixed-point encoding for temperature data and includes built-in power-on reset and brownout detection.

Key Specifications

Pinout & Package

The TMP110D1IDPWR uses a 5-pin X2SON (DPW) leadless package with wettable flanks, measuring 0.8 mm × 0.8 mm × 0.4 mm. Pin 1 has curved edges for optical solder inspection. This variant configures Pin 3 as ALERT (open-drain output), not ADD0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMP110D0IDPWR and TMP112AIDRLR, TMP110D1IDPWR provides optimal balance of ultra-small size, ±1.0°C accuracy, and dedicated ALERT pin - making it ideal for space-constrained, cost-sensitive thermal protection where 80°C trip point suffices and layout reuse is critical.

Availability

TMP110D1IDPWR is available at Aetrix Electronics and suitable for SSD thermal management, industrial PC CPU monitoring, and video doorbell occupancy sensing requiring stable component supply across automotive-grade temperature ranges and long-lifecycle programs.

Supply support for TMP110D1IDPWR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision sensing and low-power signal conditioning.

The TMP110 product line targets cost-sensitive, space-constrained thermal monitoring applications - delivering factory-calibrated accuracy, ultra-small packaging, and I²C compatibility without sacrificing reliability across industrial and consumer environments.

FAQ

What is the primary function of the ALERT pin on the TMP110D1IDPWR?

The ALERT pin on the TMP110D1IDPWR is an open-drain output that asserts low when the measured temperature meets or exceeds the programmed THigh_Limit value. It supports two operational modes - comparator mode (latching until temperature falls below TLow_Limit) and alert mode (cleared by register read or SMBus Alert Response). This pin enables hardware-triggered interrupts in systems like rack servers or industrial PCs, eliminating the need for constant I²C polling and reducing host MCU overhead. The TMP110D1IDPWR's dedicated ALERT pin (Pin 3) is fixed and not multiplexed with address functionality.

How does the TMP110D1IDPWR achieve ±1.0°C accuracy across –40°C to 125°C?

The TMP110D1IDPWR achieves ±1.0°C maximum accuracy through factory calibration of its bandgap-based temperature sensor core and 12-bit ADC, with compensation applied across voltage (1.4–5.5 V) and temperature (-40°C to 125°C) ranges. Calibration data is stored in on-chip nonvolatile memory, and the device maintains this specification without requiring system-level correction. Accuracy degrades to ±2.0°C only below 1.4 V supply - a condition explicitly avoided in typical designs using the TMP110D1IDPWR's 1.14–5.5 V operating range.

Can the TMP110D1IDPWR operate from a 1.2 V supply, and what impact does that have?

Yes, the TMP110D1IDPWR operates down to 1.14 V, including 1.2 V nominal supplies. At 1.2 V, accuracy degrades to ±2.0°C (vs. ±1.0°C at ≥1.4 V), active conversion current increases slightly (to ~90 µA), and shutdown current rises to ~1.5 µA. However, average current at 1 Hz remains low (~3.2 µA), making it viable for coin-cell-powered cold-chain loggers. Designers must validate thermal trip thresholds under 1.2 V operation and ensure POR threshold (1.02–1.06 V) is met during startup.

Is the TMP110D1IDPWR pin-compatible with the TMP102 or TMP112?

No, the TMP110D1IDPWR is not pin-compatible with the TMP102 (6-pin SOT563) or TMP112 (6-pin SOT563 or 5-pin X2SON), due to differing pin counts and functions. While TMP110D1IDPWR shares software register compatibility and I²C protocol with those devices, its 5-pin X2SON layout places ALERT on Pin 3 - whereas TMP102/TMP112 use Pin 3 for address selection or share address/alert on one pin. PCB layout must be redesigned to accommodate the TMP110D1IDPWR's unique pinout and smaller footprint.

What is the conversion time and response time of the TMP110D1IDPWR?

The TMP110D1IDPWR has a typical active conversion time of 10.25–11.25 ms (at V+ ≥ 1.4 V), during which the ADC digitizes the sensor output. Its thermal response time (time to reach 63% of final value in stirred liquid) is 1.45 s on a standard 2-layer FR4 PCB - reflecting physical thermal mass, not electrical latency. This makes it suitable for monitoring slowly changing environments (e.g., room HVAC) but not rapid transients. Conversion rate is programmable (1–8 Hz), allowing trade-offs between update frequency and average current consumption.