Analog Devices Inc./Maxim Integrated MAX6165BESA

Overview

MAX6165BESA from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 5.000V output with ±5mV initial accuracy and 4–10ppm/°C max temperature coefficient over -40°C to +85°C. It sources up to 5mA, sinks 2mA, operates from V_OUT + 0.2V (5.2V min) to 12.6V, and features 200mV max dropout at 1mA - ideal for high-accuracy ADC biasing in portable 5V systems.

For engineers reviewing the MAX6165BESA datasheet, MAX6165BESA pinout, MAX6165BESA application, or MAX6165BESA equivalent, key selection criteria include its 5.000V nominal output, SO-8 package, ultra-low 100–120µA quiescent current, 60µVp-p (0.1–10Hz) noise performance, and guaranteed stability with 1µF capacitive loads without external compensation.

Technical Context

The MAX6165BESA employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve tight initial accuracy and low thermal drift. Its internal compensation eliminates need for external capacitors, simplifying layout in space-constrained designs.

As a three-terminal series-mode reference, it draws supply current virtually independent of input voltage (≤8µA/V variation), unlike shunt-mode alternatives requiring external bias resistors. It supports sourcing and sinking load current while maintaining regulation across its full operating temperature range.

Key Specifications

Pinout & Package

MAX6165BESA is housed in an 8-pin SO (Small Outline) package with exposed pad (SO-8). Pins 1, 3, 5, 7, and 8 are no-connect (N.C.) and must remain unconnected. Pin 2 is the input (IN), Pin 4 is ground (GND), and Pin 6 is the reference output (OUT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5050IDR and ADR4550BRZ, MAX6165BESA offers the best balance of moderate accuracy (±5mV), ultra-low IQ (100µA), and capacitor-free operation - making it optimal for space- and energy-constrained 5V portable electronics where ±0.1% tolerance is sufficient.

Availability

MAX6165BESA is available at Aetrix Electronics and suitable for portable battery-powered systems, notebook computers, and precision +5V industrial calibration systems requiring stable component supply, RoHS-compliant packaging, and extended temperature support (-40°C to +85°C).

Supply support for MAX6165BESA 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 demanding industrial, medical, and communications applications.

The MAX6161–MAX6168 family was engineered specifically for high-accuracy, low-power, space-constrained voltage reference needs in portable and battery-operated systems - emphasizing micropower operation, low dropout, and capacitor-free stability.

FAQ

What is the maximum input voltage rating for MAX6165BESA?

The absolute maximum input voltage for MAX6165BESA is +13.5V, but the guaranteed operating range is V_OUT + 0.2V (5.2V minimum) to 12.6V. Operation above 12.6V risks exceeding safe power dissipation limits and may degrade long-term reliability, even if within absolute maximum ratings.

Does MAX6165BESA require an external output capacitor for stability?

No, MAX6165BESA is internally compensated and does not require an external output capacitor for stability. It remains stable with 0–1µF capacitive loads. Adding a 1µF capacitor improves transient response but is optional - a key advantage for ultra-compact PCB layouts where board space is constrained.

What is the typical turn-on settling time for MAX6165BESA?

MAX6165BESA typically settles to within 0.1% of its final 5.000V output in 300µs when C_OUT = 50pF. Settling time increases to ~1.5ms under worst-case conditions: minimum dropout (5.2V input) and maximum 5mA load current. This performance supports fast wake-up sequences in battery-powered devices.

How does the supply current of MAX6165BESA vary with input voltage?

MAX6165BESA exhibits ≤8µA/V variation in quiescent supply current across its operating input range (5.2V to 12.6V), with typical current of 100–120µA. This near-constant current behavior - unlike shunt references - maximizes efficiency and simplifies power budgeting in systems with variable input rails.

Is MAX6165BESA pin-compatible with other members of the MAX6161–MAX6168 family?

Yes, all MAX6161–MAX6168 variants, including MAX6165BESA, share identical SO-8 pinouts and footprint. Pin 2 is IN, Pin 4 is GND, Pin 6 is OUT, and Pins 1/3/5/7/8 are N.C. This allows drop-in replacement across output voltages (1.25V to 5.0V) without PCB redesign - provided system-level electrical requirements (e.g., load current, noise) are verified.