Analog Devices Inc./Maxim Integrated MAX30208CLB+T

Overview

MAX30208CLB+T from Maxim Integrated is a ±0.1°C accurate, 16-bit I²C digital temperature sensor operating from 1.7V to 3.6V, delivering 67μA operating current and 0.5μA standby current in a 2mm × 2mm × 0.75mm Thin LGA package. It integrates a 32-word FIFO, dual programmable temperature alarms, and two configurable GPIOs-GPIO1 for external conversion trigger and GPIO0 for interrupt output-targeting wearable body temperature monitors and medical thermometers.

For engineers reviewing the MAX30208CLB+T datasheet, MAX30208CLB+T pinout, MAX30208CLB+T application, or MAX30208CLB+T equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal accuracy bands (+30°C to +50°C @ ±0.1°C), real-world interface timing (400kHz I²C), and traceable alternative options for medical-grade sensing designs.

Technical Context

The MAX30208CLB+T implements a precision bandgap-based temperature-sensing core with 16-bit ADC resolution (0.005°C step), calibrated across 0°C to +70°C with ±0.15°C max error and tightened to ±0.1°C from +30°C to +50°C post-reflow. Its register-mapped architecture includes volatile alarm high/low threshold registers (0x10–0x13), status register (0x00), and interrupt enable control (0x01).

Communication occurs via standard I²C at up to 400kHz, supporting four slave addresses determined by GPIO0/GPIO1 states at START condition. The device uses open-drain SDA with internal pull-down GPIO modes (default 1MΩ), supports burst FIFO reads from 0x08, and features auto-incrementing address pointers-disabled only during FIFO_DATA access to enable continuous sampling.

Key Specifications

Pinout & Package

MAX30208CLB+T is housed in a 2mm × 2mm × 0.75mm, 10-pin Thin LGA package (package code L1022+2, outline 21-100265) with exposed thermal pad connected to GND for improved thermal response on flexible PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STS35-DIS-BLUE and LM75BIMM/NOPB, MAX30208CLB+T uniquely combines clinical-grade accuracy, integrated FIFO buffering, and dual-configurable GPIOs-making it the only option among the three qualified for FDA-cleared wearable thermometry systems requiring autonomous alarm generation and NIST-traceable calibration.

Availability

MAX30208CLB+T is available at Aetrix Electronics and suitable for wearable health devices, medical diagnostics equipment, and battery-powered IoT environmental sensors requiring stable component supply, long-lifecycle assurance, and full regulatory documentation support.

Supply support for MAX30208CLB+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 demanding applications in healthcare, industrial, and communications markets.

The MAX30208CLB+T belongs to Maxim's high-accuracy temperature sensor product line, engineered specifically for clinical-grade thermal measurement in space-constrained, low-power wearable and diagnostic instruments.

FAQ

What is the guaranteed accuracy specification for MAX30208CLB+T across its full operating range?

The MAX30208CLB+T guarantees ±0.15°C accuracy from 0°C to +70°C (post-reflow, 6σ) and tightens to ±0.1°C from +30°C to +50°C. Accuracy degrades outside these bands-e.g., ±0.3°C at –40°C per characterization data-but the device remains functional from –40°C to +85°C without damage. These values are production-tested and documented in Maxim's Electrical Characteristics table on page 2 of the official datasheet.

How does the FIFO in MAX30208CLB+T operate, and what is its practical utility?

The MAX30208CLB+T contains a 32-word (64-byte) FIFO that stores sequential 16-bit temperature readings. Each word is written automatically after a 15ms conversion, and the FIFO wraps when full. Hosts read data via burst I²C reads starting at register 0x08. This eliminates polling delays in battery-powered wearables-e.g., a 1Hz sampling system can buffer 32 seconds of data while the MCU sleeps, then fetch all values in one transaction.

Can MAX30208CLB+T generate interrupts without host processor involvement, and how is this configured?

Yes. When GPIO0 is configured as an interrupt output (GPIO_SETUP[0x20] = 0x03) and TEMP_HI_EN or TEMP_LO_EN bits are set in INTERRUPT_ENABLE[0x01], MAX30208CLB+T asserts GPIO0 low upon crossing user-defined alarm thresholds. The interrupt remains active until the STATUS register (0x00) is read-enabling true autonomous alarm signaling without continuous host polling.

What are the absolute maximum ratings for MAX30208CLB+T, and why do they matter for wearable design?

MAX30208CLB+T has VDD-to-GND rating of –0.3V to +6V, GPIO0-to-GND of –0.3V to +6V, and GPIO1-to-GND of –0.3V to VDD. Junction temperature is rated to +150°C. These margins protect against ESD events and transient overvoltage in compact wearable assemblies where layout constraints increase coupling risk-especially critical when integrating with RF modules or switching regulators on shared PCBs.

Does MAX30208CLB+T support multiple devices on the same I²C bus, and how many unique addresses are available?

Yes. MAX30208CLB+T supports four unique I²C slave addresses determined by GPIO0 and GPIO1 states at each START condition (per Table 3 in the datasheet). No external address pins or jumpers are needed-address selection is purely hardware-configurable via GPIO pull states, enabling up to four sensors on one bus without software address remapping or additional components.