Analog Devices Inc./Maxim Integrated MAX6066BEUR+T

Overview

MAX6066BEUR+T from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 2.500V output with ±0.4% initial accuracy and 20ppm/°C max temperature coefficient over –40°C to +85°C. It sources up to 5mA or sinks 2mA, draws only 90µA typical supply current, and operates with as little as 200mV dropout at 1mA load - ideal for high-accuracy ADC biasing in portable battery-powered systems.

For engineers reviewing the MAX6066BEUR+T datasheet, MAX6066BEUR+T pinout, MAX6066BEUR+T application, or MAX6066BEUR+T equivalent, key selection criteria include its SOT23-3 package compatibility, absence of required output capacitor, ultra-low supply current independence from input voltage (≤8µA/V variation), and guaranteed performance across industrial temperature range without external compensation.

Technical Context

The MAX6066BEUR+T is a three-terminal series-mode voltage reference using proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve tight initial tolerance and low thermal drift. Its internal compensation eliminates need for external capacitor, and its supply current remains stable across 2.7V to 12.6V input range (V_IN ≥ V_OUT + 0.2V).

It delivers 2.500V output with 62ppm/1000hr long-term stability and 130ppm output voltage hysteresis, supporting precision analog signal chains where reference integrity directly impacts measurement fidelity - especially in space-constrained, low-power embedded systems requiring minimal board area and high PSRR (86dB at 120Hz).

Key Specifications

Pinout & Package

MAX6066BEUR+T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 0.8mm footprint and 1.0mm height - optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the MAX6066BEUR+T offers the best balance of industrial-grade temperature stability (20ppm/°C), ultra-low dropout (200mV), and zero-output-capacitor operation - making it optimal for space- and battery-constrained designs where moderate initial accuracy (±0.4%) is acceptable.

Availability

MAX6066BEUR+T is available at Aetrix Electronics and suitable for portable battery-powered systems, precision ADC reference design, and notebook computer power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6066BEUR+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6061–MAX6068 family was designed specifically for space-constrained, battery-operated systems needing precision voltage references with micropower consumption, low dropout, and no external compensation - targeting portable instrumentation and high-resolution data acquisition.

FAQ

What is the maximum input voltage rating for MAX6066BEUR+T?

The absolute maximum input voltage for MAX6066BEUR+T is +13.5V referenced to GND. However, the recommended operating range is (V_OUT + 0.2V) to 12.6V - i.e., 2.7V to 12.6V - to ensure specified performance including line regulation and dropout behavior. Exceeding 12.6V may degrade long-term reliability even if within absolute ratings.

Does MAX6066BEUR+T require an output capacitor for stability?

No, MAX6066BEUR+T does not require an output capacitor for stability due to internal compensation. It remains stable with capacitive loads up to at least 1µF. An optional 0.1µF ceramic capacitor can be added at the OUT pin to improve transient response in high-dynamic-load applications, but it is never mandatory - a key advantage for ultra-compact PCB layouts.

What is the load regulation specification for MAX6066BEUR+T?

MAX6066BEUR+T exhibits load regulation of 0.5mV/mA (typical) when sourcing current (0–5mA) and 1.6mV/mA (typical) when sinking current (–2mA to 0). This means output voltage changes by ≤0.5mV per mA increase in sourced load current - critical for maintaining ADC reference accuracy across varying signal chain bias conditions.

How does the supply current of MAX6066BEUR+T vary with input voltage?

MAX6066BEUR+T features supply current that is virtually independent of input voltage, varying by only ≤8µA/V across its 2.7V–12.6V operating range. At +25°C, typical I_IN is 90µA, rising to ≤125µA max - enabling predictable power budgeting in systems with fluctuating supply rails, unlike shunt references whose current scales linearly with V_IN.

Is MAX6066BEUR+T pin-compatible with other members of the MAX6061–MAX6068 family?

Yes, all MAX6061–MAX6068 variants, including MAX6066BEUR+T, share identical SOT23-3 pinout (IN, OUT, GND) and footprint. This allows drop-in replacement across output voltages (1.25V–5.0V) without PCB redesign - provided the new voltage meets system requirements and input voltage constraints (e.g., V_IN ≥ V_OUT + 0.2V) are satisfied.