Analog Devices Inc./Maxim Integrated MAX674EPA

Overview

MAX674EPA from Maxim Integrated is a precision +10V voltage reference IC with ±15mV initial output tolerance, 15ppm/°C temperature coefficient over –40°C to +85°C, and 20µV_P-P low-frequency noise (0.1Hz–10Hz). It delivers 1.4mA max supply current, 0.001%/mA load regulation, and operates from 13V to 33V input. Used in high-accuracy data acquisition systems requiring stable analog references.

For engineers reviewing the MAX674EPA datasheet, MAX674EPA pinout, MAX674EPA application, or MAX674EPA equivalent, key selection criteria include guaranteed tempco across industrial temperature range, trim-adjustable output for binary-scaled systems (e.g., 10.240V), short-circuit protection, and pin compatibility with REF01 in 8-pin PDIP.

Technical Context

The MAX674EPA implements a buried-Zener-based reference core with on-chip trimming for ±0.15% accuracy at +10V. Its temperature stability is achieved via curvature-compensated biasing, delivering 15ppm/°C max over –40°C to +85°C per the box method. Output adjustment via the TRIM pin supports ±300mV tuning without degrading tempco by more than 0.7ppm/°C per 100mV shift.

It features internal short-circuit protection enabling indefinite sink to ground or VIN, and exhibits 5µs turn-on settling to ±0.1%. Line regulation is 0.01%/V (13V–33V), and noise performance is specified as 20µV_P-P in the 0.1Hz–10Hz band - critical for high-resolution ADC/DAC biasing.

Key Specifications

Pinout & Package

MAX674EPA is housed in an 8-pin plastic DIP (PDIP) package with 0.300" width, per drawing code P8-2*. Pin functions are electrically identical across MAX674 variants in this package type.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF01CP and MAX675EPA, the MAX674EPA uniquely combines industrial temperature range, trimmable +10V output, and 15ppm/°C stability - making it the sole option for calibrated 10.240V binary references in extended-temperature data loggers and test equipment.

Availability

MAX674EPA is available at Aetrix Electronics and suitable for digital voltmeters, high-resolution DACs, threshold detectors, and bipolar reference generation requiring stable component supply across industrial temperature environments.

Supply support for MAX674EPA 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, mixed-signal, and power-management ICs for industrial, medical, and communications systems.

The MAX674EPA belongs to Maxim's precision voltage reference product line, engineered for metrology-grade accuracy, low noise, and robust operation in automated test equipment and factory calibration systems.

FAQ

What is the operating temperature range for the MAX674EPA?

The MAX674EPA is rated for continuous operation from –40°C to +85°C. This industrial temperature range is explicitly guaranteed per the ordering table and electrical characteristics section of the datasheet, distinguishing it from the commercial-grade MAX674CPA (0°C to +70°C). The MAX674EPA maintains its 15ppm/°C tempco and ±15mV initial accuracy across this full range.

Does the MAX674EPA require external components to operate?

Yes - the MAX674EPA requires an external 10kΩ potentiometer connected between VOUT and TRIM pins to enable output adjustment. If no trimming is needed, the TRIM pin may be left open. No external capacitors are mandatory, though a 0.1µF ceramic bypass capacitor at VIN is recommended for noise suppression. The device draws up to 1.4mA and operates from 13V to 33V input.

Is the MAX674EPA pin-compatible with the REF01 series?

Yes - the MAX674EPA is pin-for-pin compatible with the REF01 in 8-pin PDIP packages, as confirmed in the Features section of the datasheet. Pin assignments (VOUT, TRIM, GND, VIN) match exactly, and both devices share identical footprint dimensions and thermal pad requirements. This allows direct substitution in existing REF01-based PCB layouts without modification.

What is the maximum load current the MAX674EPA can drive?

The MAX674EPA can source or sink up to 30mA continuously, as specified by its short-circuit current (ISC = 30mA at VOUT = 0V). However, practical load current is limited by power dissipation: at 15V input and 10V output, maximum safe load is ~25mA in free-air conditions before exceeding the 500mW plastic DIP derating limit. Load regulation remains 0.001%/mA within this range.

Can the MAX674EPA output be adjusted to exactly 10.240V?

Yes - the MAX674EPA's TRIM pin supports ±300mV adjustment around its nominal +10V output, enabling precise setting to 10.240V for binary-scaled 10-bit, 12-bit, or 16-bit converter applications. The datasheet confirms that output adjustment does not significantly degrade temperature performance, with tempco shift limited to ~0.7ppm/°C per 100mV of adjustment - well within tolerance for most calibration use cases.