Analog Devices Inc./Maxim Integrated MAX6177BASA+

Overview

MAX6177BASA+ from Maxim Integrated is a high-precision, low-noise 3.3V voltage reference with integrated temperature sensor output (TEMP), ±0.1% initial accuracy, 3ppm/°C max temperature coefficient, and operation across -40°C to +125°C. It sources up to 30mA, draws only 320μA typical supply current, and requires no output bypass capacitor-enabling use in high-resolution ADC/DAC systems, automotive sensors, and precision threshold detectors.

For engineers reviewing the MAX6177BASA+ datasheet, MAX6177BASA+ pinout, MAX177BASA+ application, or MAX6177BASA+ equivalent, key selection criteria include its guaranteed 3.3V output tolerance, TEMP output linearity (2.1mV/°C), trim-adjustable range (±6%), stability with 100μF capacitive loads, and AEC-Q100 qualification for automotive-grade reliability.

Technical Context

The MAX6177BASA+ employs bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C max TCVOUT over -40°C to +125°C. Its TEMP pin delivers a linear 2.1mV/°C analog voltage proportional to die temperature, calibrated at 630mV nominal at +25°C.

It features active short-circuit protection (60mA to GND, 3mA to IN), supports trimming via external resistive divider on TRIM pin, and maintains stability without output capacitance-unlike many references requiring ≥1μF bypassing. Input voltage range is 5.3V to 40V, with load regulation of ≤15ppm/mA (sourcing) and ≤900ppm/mA (sinking).

Key Specifications

Pinout & Package

The MAX6177BASA+ is housed in an 8-pin SO (Small Outline) package (package code S8+4, outline 21-0041), RoHS-compliant, with standard 1.27mm pitch and exposed pad not present. Pin 1 and Pin 8 are internally connected (I.C.) and must remain unconnected externally; Pin 7 is no-connect (N.C.).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF3333AIDBVR and ADR4533BRZ, the MAX6177BASA+ uniquely combines automotive-grade tempco (3ppm/°C), integrated die-temperature sensing, and ±6% output trim in a single SO-8 package-making it optimal for cost-sensitive, thermally aware embedded systems where feature integration reduces component count and calibration complexity.

Availability

MAX6177BASA+ is available at Aetrix Electronics and suitable for automotive battery management, high-resolution data acquisition, industrial threshold detection, and programmable power supply applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX177BASA+ 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 high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, communications, and computing markets.

The MAX6177BASA+ belongs to the MAX6173–MAX6177 family of high-precision voltage references with integrated temperature sensors-engineered specifically for applications demanding simultaneous accurate voltage referencing and on-chip thermal monitoring in harsh environments.

FAQ

What is the guaranteed initial accuracy of the MAX6177BASA+ at +25°C?

The MAX6177BASA+ guarantees ±0.1% initial output voltage accuracy at +25°C, corresponding to a 3.3V nominal output ranging from 3.2967V to 3.3033V under no-load conditions. This specification is fully tested and specified in the device's electrical characteristics table and applies across the entire production lot without binning or sorting.

Does the MAX6177BASA+ require an output bypass capacitor for stability?

No, the MAX6177BASA+ does not require an output bypass capacitor for stability. It is internally compensated and remains stable with capacitive loads from 0 to 100μF. This eliminates the need for external output capacitance in most applications, reducing PCB area, BOM cost, and potential noise coupling paths-particularly valuable in space-constrained automotive and portable instrumentation designs.

How is the TEMP output of the MAX6177BASA+ calibrated and what is its practical use?

The TEMP output of the MAX6177BASA+ is factory-calibrated to deliver 630mV ±155mV at +25°C with a linear 2.1mV/°C temperature coefficient. It provides direct die-temperature sensing for thermal compensation of system parameters (e.g., ADC gain drift) or overtemperature shutdown. Unlike external sensors, it requires no calibration and tracks junction temperature with minimal latency, making it ideal for real-time thermal management in motor drivers and power converters.

Can the output voltage of the MAX6177BASA+ be adjusted, and if so, how?

Yes, the MAX6177BASA+ output voltage can be trimmed ±6% around its nominal 3.3V value using the TRIM pin. Connect a resistive divider between OUT and GND, with the wiper tied to TRIM. The output change follows ∆V_OUT = 2 × (V_TRIM − V_OUT/2) × k, where k ≈ ±6%. This enables system-level calibration to correct for PCB trace resistance, ADC offset, or other downstream errors without requiring a separate DAC or digital controller.

Is the MAX6177BASA+ qualified for automotive applications, and what does that entail?

Yes, the MAX6177BASA+ is AEC-Q100 qualified for automotive applications. This certification confirms it meets rigorous stress-test requirements-including temperature cycling, humidity testing, and ESD robustness-across the full -40°C to +125°C operating range. It is suitable for use in engine control units, battery management systems, ADAS sensors, and infotainment power supplies where reliability under vibration, thermal shock, and extended lifetime is mandatory.