Analog Devices Inc. TMP05BRT-500RL7

Overview

TMP05BRT-500RL7 from Analog Devices is a monolithic ±0.5°C accurate PWM temperature sensor in 5-lead SC-70 package, generating a ratiometric pulse-width modulated output where TH remains fixed (34 ms typ at 25°C) and TL varies linearly with temperature (65 ms typ at 25°C), operating from −40°C to +150°C at 3 V–5.5 V supply - used for thermal protection in power-system monitors and isolated sensor interfaces.

For engineers reviewing the TMP05BRT-500RL7 datasheet, TMP05BRT-500RL7 pinout, TMP05BRT-500RL7 application, or TMP05BRT-500RL7 equivalent, key selection considerations include its B-grade accuracy (±1°C from 0°C to 70°C), push-pull CMOS/TTL-compatible PWM output, 0.025°C temperature resolution, one-shot mode enabling 102 µW average power at 1 SPS, and SC-70 footprint compatibility with space-constrained embedded thermal monitoring designs.

Technical Context

The TMP05BRT-500RL7 implements a first-order Σ-Δ modulator with on-chip V_PTAT sensor and precision voltage reference, delivering ratiometric PWM encoding independent of clock drift. Its output timing uses fixed TH (34 ms nominal) and variable TL proportional to absolute temperature, enabling direct microprocessor decoding via Equation: °C = 421 − (751 × TH/TL).

Three operating modes - continuously converting (FUNC floating), one shot (FUNC low), and daisy-chain (FUNC high) - are selected at power-up via the FUNC pin; CONV/IN determines conversion rate in continuous/one-shot modes or serves as daisy-chain input in chain mode. The device requires a 0.1 µF decoupling capacitor at VDD for specified ±0.5°C accuracy.

Key Specifications

Pinout & Package

Package: 5-lead SC-70 (KS-5), surface-mount, 2.0 mm × 1.25 mm footprint, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6611ASA+ and LM75BIMM/NOPB, the TMP05BRT-500RL7 offers superior accuracy (±0.5°C vs. ±1.5°C/±2°C), lowest system-level component count (no clock, no bus logic), and smallest footprint (5-lead SC-70), making it optimal for cost-sensitive, space-constrained, or ultra-low-power thermal safety functions.

Availability

TMP05BRT-500RL7 is available at Aetrix Electronics and suitable for computer thermal monitoring, power-system thermal protection, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TMP05BRT-500RL7 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets since 1965.

The TMP05/TMP06 product line was designed specifically for high-accuracy, low-power, single-wire thermal sensing in electrically noisy or space-constrained environments - emphasizing ratiometric robustness, minimal external components, and wide industrial temperature operation.

FAQ

What is the accuracy specification of the TMP05BRT-500RL7 over its full operating temperature range?

The TMP05BRT-500RL7 has B-grade accuracy: ±1.0°C from 0°C to 70°C, ±2.0°C from −40°C to +100°C, and ±4.5°C from −40°C to +150°C. At 25°C, typical accuracy is ±0.5°C when used with the recommended 0.1 µF VDD decoupling capacitor. These values are validated per Analog Devices Rev. C datasheet Table 2 and apply specifically to the TMP05B variant in SC-70 packaging.

Does the TMP05BRT-500RL7 require external components to achieve its specified accuracy?

Yes - the TMP05BRT-500RL7 requires a 0.1 µF multilayer ceramic capacitor placed as close as possible to the VDD pin to achieve its ±0.5°C typical accuracy at 25°C. Without this capacitor, accuracy degrades significantly due to supply noise coupling into the Σ-Δ modulator. No other passive components (e.g., resistors, pull-ups) are needed for basic PWM operation.

How does the TMP05BRT-500RL7 differ from the TMP06 variant?

The TMP05BRT-500RL7 is the TMP05 variant with a CMOS/TTL-compatible push-pull output capable of sourcing/sinking up to 2 mA. In contrast, the TMP06 uses an open-drain output that sinks up to 5 mA but requires an external pull-up resistor. The TMP05BRT-500RL7 eliminates external biasing, simplifying PCB layout and reducing component count for direct MCU GPIO interfacing.

Can the TMP05BRT-500RL7 operate reliably above 125°C?

The TMP05BRT-500RL7 is rated for operation from −40°C to +150°C, but Analog Devices specifies that exposure above +125°C should not exceed 5% of total device lifetime (≈5,000 hours) to maintain reliability. Continuous operation above 125°C accelerates long-term drift and may compromise the ±0.5°C accuracy guarantee - use only for short-duration thermal events in such conditions.

What are the three operating modes of the TMP05BRT-500RL7 and how are they selected?

The TMP05BRT-500RL7 supports continuously converting (FUNC pin floating), one-shot (FUNC low), and daisy-chain (FUNC high) modes - all latched at power-up. CONV/IN configures conversion rate in continuous/one-shot modes or receives upstream PWM in daisy-chain mode. This flexibility enables scalable thermal monitoring from single-point checks to multi-node distributed sensing without firmware changes.