Analog Devices Inc./Maxim Integrated MAX6174BASA+

Overview

The MAX6174BASA+ from Maxim Integrated is a high-precision, low-noise 4.096V voltage reference with integrated temperature sensor output (TEMP), ±0.1% initial accuracy, 3ppm/°C max temperature coefficient over –40°C to +125°C, and 7µV_P-P (0.1Hz–10Hz) noise-designed for metrology-grade ADC/DAC biasing in automotive and industrial data acquisition systems.

For engineers reviewing the MAX6174BASA+ datasheet, MAX6174BASA+ pinout, MAX6174BASA+ application, or MAX6174BASA+ equivalent, this page delivers verified electrical specs, thermal transducer behavior, trim interface design guidance, and AEC-Q100-relevant operating margins for precision analog signal chains.

Technical Context

The MAX6174BASA+ uses curvature-corrected bandgap architecture with laser-trimmed thin-film resistors to achieve 3ppm/°C max TCV_OUT across –40°C to +125°C. Its TEMP pin provides a linear 2.1mV/°C output referenced to die temperature, enabling on-chip thermal monitoring without external sensors.

It supports ±6% output voltage adjustment via resistive divider on the TRIM pin, draws only 320µA typical supply current, and remains stable with capacitive loads up to 100µF-eliminating mandatory output bypassing while maintaining 0.1% settling in 200µs (C_OUT = 50pF).

Key Specifications

Pinout & Package

The MAX6174BASA+ is housed in an 8-pin SO (Small Outline) package (package code S8+4, outline 21-0041), RoHS-compliant, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5040IDR and ADR4540BRZ, the MAX6174BASA+ uniquely integrates a calibrated temperature sensor and eliminates output capacitor requirements - reducing component count and improving reliability in space-constrained automotive and portable designs.

Availability

MAX6174BASA+ is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC analog input modules, and portable test equipment requiring stable component supply with AEC-Q100 compliance and long-lifecycle support.

Supply support for MAX6174BASA+ 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 ICs for industrial, automotive, communications, and computing markets.

The MAX6173–MAX6177 family delivers high-accuracy, low-drift voltage references with integrated temperature sensing - engineered specifically for data converter biasing in harsh-environment applications demanding AEC-Q100 qualification and zero-output-capacitor operation.

FAQ

What is the guaranteed initial accuracy of the MAX6174BASA+ at +25°C?

The MAX6174BASA+ guarantees ±0.1% initial output voltage accuracy at +25°C, corresponding to ±4.1mV deviation from the nominal 4.096V output. This specification is tested 100% in production and applies across the full device lot - enabling single-point calibration in high-volume manufacturing without binning.

Can the MAX6174BASA+ operate without an output bypass capacitor?

Yes, the MAX6174BASA+ is internally compensated and stable with 0–100µF capacitive loads - no output bypass capacitor is required. This eliminates a common failure point, reduces PCB area by ~2mm², and avoids capacitor aging effects that degrade long-term reference stability in mission-critical systems.

How is the TEMP output calibrated, and what is its accuracy?

The TEMP output of the MAX6174BASA+ provides 475–785mV at +25°C with a guaranteed 2.1mV/°C slope. Accuracy is ±1.5°C over –40°C to +125°C when self-heating (≤0.5°C at 320µA) is accounted for - making it suitable for die-temperature monitoring in closed-loop thermal management without external calibration.

What is the maximum load current the MAX6174BASA+ can source or sink?

The MAX6174BASA+ can source up to 30mA and sink up to 2mA while maintaining output regulation within datasheet limits. This allows direct driving of ADC reference inputs, op-amp buffers, and small-signal DACs - eliminating external follower stages in most precision analog signal chains.

Does the MAX6174BASA+ meet AEC-Q100 automotive qualification standards?

Yes, the MAX6174BASA+ is offered in AEC-Q100 qualified versions (denoted by /V suffix in ordering codes). While MAX6174BASA+ itself is the standard industrial-grade variant, its /V counterparts are fully qualified to AEC-Q100 Rev H Grade 1 (–40°C to +125°C), including stress testing for HTOL, TC, and ESD - validated for under-hood automotive use.