Analog Devices Inc./Maxim Integrated REF02DP+

Overview

REF02DP+ from Maxim Integrated is a precision 5V voltage reference IC with integrated linear temperature transducer output (TEMP pin), designed for high-accuracy analog systems requiring stable excitation and thermal monitoring. It delivers ±15mV initial accuracy, 8.5ppm/°C max temperature coefficient over 0°C to +70°C, 10µV_P-P low-frequency noise (0.1Hz–10Hz), and operates from 7V to 33V single supply - used in precision ADC/DAC calibration and remote temperature sensing circuits.

For engineers reviewing the REF02DP+ datasheet, REF02DP+ pinout, REF02DP+ application, or REF02DP+ equivalent, key selection criteria include its dual-function output (5V reference + 2.1mV/°C TEMP signal), plastic DIP-8 package compatibility, trim-adjustable range (±6%), and guaranteed short-circuit protection without external components.

Technical Context

The REF02DP+ implements a bandgap-based reference core with on-chip trimming for 5V nominal output and a dedicated TEMP terminal that provides a linear voltage proportional to absolute temperature (630mV at 25°C, 2.1mV/°C slope). Its internal architecture supports simultaneous high-stability voltage referencing and direct temperature measurement without external amplification.

It features a 1mA quiescent current, 10mA load capability, and operates across an input voltage range of 7V–33V. The device includes built-in short-circuit protection and maintains output stability under thermal shock, with turn-on settling time of 230µs to ±0.1%.

Key Specifications

Pinout & Package

REF02DP+ is housed in an 8-pin Plastic Dual-In-Line Package (PDIP), pin-compatible with industry-standard DIP-8 footprints. The package supports through-hole mounting and meets JEDEC MS-001 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF02DP+, REF02HSA+ trades DIP-8 through-hole compatibility and tighter tempco for surface-mount convenience, while MAX6035AESA+ abandons the 5V/TEMP dual function entirely in favor of lower drift and smaller size - making REF02DP+ uniquely suited for legacy-compatible, thermally aware 5V reference designs.

Availability

REF02DP+ is available at Aetrix Electronics and suitable for precision data acquisition, portable test equipment, and industrial sensor conditioning requiring stable component supply, long-term parametric consistency, and through-hole manufacturability.

Supply support for REF02DP+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The REF02DP+ belongs to Maxim's precision voltage reference product line, engineered for applications demanding tight initial accuracy, low drift, and integrated thermal monitoring - particularly in calibration, instrumentation, and sensor interface systems.

FAQ

What is the operating temperature range of the REF02DP+?

The REF02DP+ is specified for operation from 0°C to +70°C. This industrial-grade range ensures stable 5V reference performance and accurate TEMP pin output (630mV at 25°C, 2.1mV/°C) across typical bench and factory environments. Its 8.5ppm/°C maximum temperature coefficient applies within this full range, and the device remains functional beyond these limits though not guaranteed to spec.

Can the REF02DP+ be used as a standalone temperature sensor?

Yes, the REF02DP+ can serve as a calibrated temperature sensor via its dedicated TEMP pin, which outputs 630mV at 25°C with a precise 2.1mV/°C slope. However, it must be powered within its 7V–33V input range and loaded with ≤50nA - typically achieved using a high-impedance buffer amplifier. The REF02DP+ does not replace dedicated digital temperature sensors but provides analog temperature data co-located with its voltage reference.

Does the REF02DP+ require external capacitors for stability?

Yes, the REF02DP+ requires a minimum 1µF ceramic capacitor between VIN and GND, placed as close as possible to pins 7 and 4. This capacitor suppresses supply noise and prevents oscillation under varying load conditions. No output capacitor is required for basic operation, but a 10nF ceramic cap from VOUT to GND may further reduce high-frequency noise in sensitive applications.

How does output trimming affect the temperature coefficient of the REF02DP+?

Trimming the REF02DP+ output voltage changes its temperature coefficient by approximately 0.7ppm/°C per 100mV of adjustment - for example, adjusting from 5.000V to 5.100V increases the tempco by ~0.7ppm/°C. This effect is linear and documented in the datasheet; the base 8.5ppm/°C max tempco assumes no trimming. Designers should verify final tempco after trimming if operating near specification limits.

Is the REF02DP+ pin-compatible with other REF02 variants like REF02EP+?

Yes, the REF02DP+ is fully pin-compatible with all REF02 family members in the 8-pin PDIP package (e.g., REF02EP+, REF02HP+), sharing identical pinout, electrical interface, and mechanical footprint. Differences lie only in initial accuracy (±15mV for D-grade vs. ±15mV for E-grade), tempco (8.5ppm/°C for D/E vs. 25ppm/°C for H), and temperature range - all implemented via laser trimming and screening, not pin assignment.