Analog Devices Inc./Maxim Integrated MAX6520EUR-T

Overview

MAX6520EUR-T from Maxim Integrated is a precision 1.2V, three-terminal voltage reference IC in SOT23-3 package, featuring ±1% initial accuracy, 50ppm/°C max temperature coefficient, and 70µA maximum supply current independent of input voltage. It operates from 2.4V to 11V and is optimized for ultra-low-power battery-powered instrumentation and data-acquisition systems.

For engineers reviewing the MAX6520EUR-T datasheet, MAX6520EUR-T pinout, MAX6520EUR-T application, or MAX6520EUR-T equivalent, key selection criteria include supply-current stability over input voltage and temperature, low-noise 1.2V output with minimal load regulation (0.1 µV/µA), and guaranteed performance across –40°C to +85°C.

Technical Context

The MAX6520EUR-T implements a bandgap-based reference core with internal trimming for ±1% initial accuracy and 50ppm/°C max TCVOUT. Its supply current remains constant (50–70µA) across VIN = 2.4V to 11V and TA = –40°C to +85°C, eliminating dependency on input voltage or load current.

It delivers 1.2V output with 0.1Hz–10Hz noise of 50µV_p-p, PSRR > 60dB at 1kHz, and load regulation of 0.1 µV/µA over I_LOAD = –50µA to +400µA - enabling stable biasing for high-resolution ADCs and DACs in portable measurement systems.

Key Specifications

Pinout & Package

SOT23-3 package: 1.75mm × 2.0mm × 1.3mm body, gull-wing leads, JEDEC MO-178AA compliant. RoHS-compliant, Pb-free, halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3412ARJZ-R7 and REF3012AIDBZR, the MAX6520EUR-T uniquely balances ±1% accuracy, 50ppm/°C tempco, and 70µA max supply current in SOT23-3 - making it optimal for cost-sensitive, long-life battery systems where sub-0.2% accuracy is unnecessary.

Availability

MAX6520EUR-T is available at Aetrix Electronics and suitable for portable instrumentation, wireless sensor nodes, and handheld test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6520EUR-T 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 applications.

The MAX6520EUR-T belongs to Maxim's ultra-low-power voltage reference product line, engineered specifically for battery-critical systems needing stable 1.2V references with minimal quiescent current and robust temperature performance.

FAQ

What is the operating temperature range for the MAX6520EUR-T?

The MAX6520EUR-T is specified for operation from –40°C to +85°C. This range is fully guaranteed per its Absolute Maximum Ratings and DC Electrical Characteristics tables, with all parameters - including supply current, output voltage, and tempco - validated across this span using parametric correlation data. The MAX6520EUR-T maintains 50ppm/°C max TCVOUT and 70µA max IQ throughout this range, making it suitable for outdoor and industrial environments.

Does the MAX6520EUR-T require an input bypass capacitor?

Yes, the MAX6520EUR-T requires a 0.1µF ceramic capacitor placed as close as possible to the VIN pin for optimal line-transient performance, as stated in the Applications Information section. Without it, PSRR degrades significantly above 100Hz, risking reference instability during supply fluctuations. The capacitor is not required for basic DC operation but is mandatory for systems subject to switching noise or battery voltage sag.

Can the MAX6520EUR-T drive a capacitive load?

The MAX6520EUR-T can drive up to 10nF total output capacitance without oscillation or settling degradation, per the Applications Information section. Exceeding this limit may cause phase margin loss and overshoot in load-transient response. For DAC or ADC reference inputs requiring larger charge reservoirs, use a series resistor (≥10Ω) between VOUT and the capacitor to maintain stability while preserving DC accuracy.

How does the supply current of the MAX6520EUR-T behave across input voltage?

The MAX6520EUR-T exhibits supply current independence from input voltage: IQ remains constant at 50µA (typ) to 70µA (max) over VIN = 2.4V to 11V, as confirmed in the DC Electrical Characteristics table and TOC-01 graph. This behavior eliminates current variation during battery discharge, enabling accurate runtime estimation and simplifying power budgeting in energy-constrained designs.

Is the MAX6520EUR-T pin-compatible with other SOT23-3 voltage references?

No documented pin-compatible replacements exist for the MAX6520EUR-T in SOT23-3. While many 3-pin references share VIN/GND/VOUT pinout, the MAX6520EUR-T's specific pin assignment (VIN=Pin1, VOUT=Pin2, GND=Pin3) differs from common configurations like LM4040 (cathode/anode/reference). Always verify pin mapping against the device-specific datasheet before substitution - mismatched pinouts risk damage or malfunction.