Analog Devices Inc./Maxim Integrated MAX31875R0TZS+T

Overview

MAX31875R0TZS+T from Maxim Integrated is a ±1°C-accurate local temperature sensor with I²C/SMBus interface in a 4-bump wafer-level package (WLP), operating from -50°C to +150°C. It delivers 12-bit resolution (0.0625°C LSB), <10µA average supply current at 0.25 conversions/s, and supports PEC for error-resilient communication in battery-powered and space-constrained systems.

For engineers reviewing the MAX31875R0TZS+T datasheet, MAX31875R0TZS+T pinout, MAX31875R0TZS+T application, or MAX31875R0TZS+T equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and parametric differences.

Technical Context

The MAX31875R0TZS+T integrates a precision silicon diode-based temperature sensing element with a 16-bit sigma-delta ADC and fully compliant I²C/SMBus physical layer. Its digital core implements configurable resolution (8–12 bits), programmable conversion rate (0.25–8 sps), and selectable bus timeout (enabled by default) to prevent lockup on stalled SCL.

It features dual-mode overtemperature signaling (Comparator or Interrupt), factory-programmed slave address (1001000b), and extended data format support for readings ≥+128°C. All registers-including temperature, configuration, TOS, and THYST-are accessed via 2-byte reads/writes with no auto-increment, and the device retains full register accessibility during shutdown mode.

Key Specifications

Pinout & Package

MAX31875R0TZS+T uses a 4-bump wafer-level package (WLP) with bottom-side solder bumps. The package outline is defined by land pattern AN1891 and outline number 21-100151. Thermal resistance θ_JA is 103°C/W on a four-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX31875R0TZS+T, the R1 variant offers identical performance with address differentiation for bus scalability, while the LM75BIMM/NOPB trades accuracy, power efficiency, and package size for lower unit cost - making it viable only in less demanding thermal contexts.

Availability

MAX31875R0TZS+T is available at Aetrix Electronics and suitable for battery-powered equipment, handheld electronics, and data communications equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX31875R0TZS+T 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

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, computing, and communications markets, with emphasis on low-power, high-accuracy sensor interfaces.

The MAX31875 product line targets ultra-compact, energy-efficient thermal monitoring in space- and power-constrained systems - delivering calibrated local temperature data without external components or calibration overhead.

FAQ

What is the factory-programmed I²C slave address for MAX31875R0TZS+T?

The MAX31875R0TZS+T has a fixed I²C slave address of 1001000b (0x48 in 7-bit format). This address is laser-trimmed at wafer test and cannot be modified. When designing multi-sensor systems, use variants like MAX31875R1TZS+T (0x49) or R2TZS+T (0x4A) to avoid bus conflicts. The MAX31875R0TZS+T datasheet confirms this value in Table 1 and the Ordering Information section.

Does MAX31875R0TZS+T support both I²C and SMBus protocols?

Yes, MAX31875R0TZS+T fully supports standard I²C (including repeated START, ACK/NACK) and SMBus features including Packet Error Checking (PEC) and bus timeout. It accepts standard write/read byte commands and complies with SMBus timing requirements such as tTIMEOUT (14–55ms). The MAX31875R0TZS+T datasheet explicitly states compatibility with both interfaces in the General Description and Detailed Description sections.

What is the minimum conversion time for MAX31875R0TZS+T at 12-bit resolution?

The minimum conversion time for MAX31875R0TZS+T at 12-bit resolution is 140ms (typical), as each additional bit doubles the base 10-bit time of 35ms. This value is specified in the Electrical Characteristics table under "Conversion Time" with VDD ≥ 3V. At lower supply voltages (≤2.5V), the time increases to 150ms max. The MAX31875R0TZS+T must complete conversion before the next auto-triggered cycle to avoid stale data retention.

Can MAX31875R0TZS+T measure temperatures above +128°C?

Yes, MAX31875R0TZS+T can measure up to +150°C using the extended temperature format, enabled by setting bit D7 in the Configuration register. In this mode, the MSB weight shifts from 64°C to 128°C, allowing unambiguous representation of values ≥+128°C. The MAX31875R0TZS+T datasheet confirms this capability in the Temperature Register and Data Format sections, with accuracy maintained at ±1.75°C across the full -40°C to +145°C range.

What is the maximum allowed supply voltage for MAX31875R0TZS+T?

The absolute maximum supply voltage for MAX31875R0TZS+T is +4.0V (VDD to GND), but the recommended operating range is +1.6V to +3.6V. Exceeding +3.6V risks violating the guaranteed electrical specifications and may accelerate parametric drift or reduce long-term reliability. The MAX31875R0TZS+T Absolute Maximum Ratings table specifies -0.3V to +4V, and all performance parameters (accuracy, current, conversion time) are characterized only within the 1.6V–3.6V window.