Analog Devices Inc./Maxim Integrated MAX6173BASA/V+

Overview

MAX6173BASA/V+ from Maxim Integrated is a high-precision, low-noise voltage reference with integrated temperature sensor output, delivering +2.5V nominal output, ±0.1% initial accuracy (max), 3ppm/°C max temperature coefficient over –40°C to +125°C, and 3.8µV_P-P (0.1Hz–10Hz) noise - used in automotive-grade 16-bit ADC/DAC calibration and precision temperature monitoring circuits.

For engineers reviewing the MAX6173BASA/V+ datasheet, MAX6173BASA/V+ pinout, MAX6173BASA/V+ application, or MAX6173BASA/V+ equivalent, key selection criteria include guaranteed AEC-Q100 qualification (/V suffix), TRIM-adjustable output (±6% range), TEMP output linearity (1.9mV/°C), no-output-capacitor stability, and sourcing capability up to 30mA.

Technical Context

The MAX6173BASA/V+ employs bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve ultra-low drift. Its TEMP terminal provides a linear voltage proportional to die temperature (1.9mV/°C), enabling direct analog temperature sensing without external signal conditioning.

It features a dedicated TRIM input for fine output adjustment via external resistive divider, supports wide input range (V_OUT + 2V to +40V), and maintains stability with capacitive loads up to 100µF - eliminating mandatory output bypassing while retaining fast 150µs turn-on settling to 0.1%.

Key Specifications

Pinout & Package

MAX6173BASA/V+ is housed in an 8-pin SO package (package code S8+4, outline 21-0041), RoHS-compliant, with exposed pad not electrically connected. Pin 1 and 8 are internally connected (I.C.), 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 ADR4525BRZ and REF5025IDR, MAX6173BASA/V+ uniquely integrates trimmable reference, temperature sensor, and robust output drive in a single AEC-Q100-qualified SO package - simplifying system-level thermal management and calibration without sacrificing precision.

Availability

MAX6173BASA/V+ is available at Aetrix Electronics and suitable for automotive battery management, industrial data acquisition, medical instrumentation calibration, and test & measurement equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6173BASA/V+ 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 automotive, industrial, communications, and computing markets.

The MAX6173–MAX6177 family was engineered specifically for high-accuracy, low-drift voltage referencing in harsh environments - combining bandgap stability, curvature correction, and integrated temperature sensing for next-generation precision measurement systems.

FAQ

What is the guaranteed initial accuracy of MAX6173BASA/V+ at +25°C?

The MAX6173BASA/V+ guarantees ±0.1% initial output voltage accuracy at +25°C, corresponding to ±2.5mV error on its +2.5V nominal output. This specification is tested and binned during production, and the 'B' grade denotes the 0.1% tolerance level - distinct from the tighter ±0.06% 'A' grade variants in the same family.

Does MAX6173BASA/V+ require an output bypass capacitor for stability?

No, MAX6173BASA/V+ 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 board space and cost associated with external capacitors while maintaining robust transient response - confirmed across all operating conditions in the official datasheet.

How is the TEMP output of MAX6173BASA/V+ calibrated and what is its sensitivity?

The TEMP output of MAX6173BASA/V+ provides a voltage linearly proportional to die temperature with a nominal sensitivity of 1.9mV/°C and a typical output of 570mV at +25°C. The relationship is defined as V_TEMP = T_J × 1.9mV/°C, where T_J is junction temperature in °C. Self-heating must be accounted for in high-power layouts to maintain ±1.5°C typical accuracy.

Can MAX6173BASA/V+ be used in AEC-Q100 automotive applications?

Yes, MAX6173BASA/V+ is explicitly AEC-Q100 qualified (Grade 0: –40°C to +125°C ambient), as indicated by the '/V' suffix in its part number. It meets stress testing requirements for automotive use including HTOL, TC, and ESD - making it suitable for engine control, battery monitoring, and ADAS subsystems where reliability under thermal and electrical stress is mandatory.

What is the maximum load current that MAX6173BASA/V+ can source or sink?

MAX6173BASA/V+ can source up to 30mA and sink up to 2mA while maintaining specified accuracy and regulation. Output short-circuit protection limits current to 60mA (OUT-to-GND) and 3mA (OUT-to-IN). These drive capabilities allow direct interfacing with ADC reference inputs, op-amp buffers, and small analog loads without external drivers.