Analog Devices Inc./Maxim Integrated MAX6025BEUR+T

Overview

MAX6025BEUR+T from Analog Devices is a precision 2.500V series-mode voltage reference in SOT23-3 package, featuring ±0.40% initial accuracy, 20ppm/°C max temperature coefficient over –40°C to +85°C, 100mV dropout at 500μA load, and 35μA max quiescent current - enabling high-accuracy ADC/DAC biasing in battery-powered instrumentation.

For engineers reviewing the MAX6025BEUR+T datasheet, MAX6025BEUR+T pinout, MAX6025BEUR+T application, or MAX6025BEUR+T equivalent, key selection criteria include output stability under varying load (0.14–0.60 μV/μA sourcing), supply-voltage independence (0.8μA/V variation), capacitive-load tolerance (0–2.2nF), and low-noise operation (50μV_p-p, 0.1Hz–10Hz).

Technical Context

The MAX6025BEUR+T employs a curvature-corrected bandgap core with laser-trimmed thin-film resistors to achieve <20ppm/°C TC and ±0.40% initial accuracy. Its series-mode architecture eliminates external bias resistors and compensation capacitors required by shunt references.

It operates across V_IN = (V_OUT + 0.2V) to 12.6V, delivers ±500μA output current, and maintains stability without external capacitance - supporting direct connection to SAR ADC reference inputs and low-power sensor signal chains.

Key Specifications

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 0.95mm pitch, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3425BRJZ-R7 and REF3325AIDBVR, the MAX6025BEUR+T offers superior load drive (±500μA) and unconditional stability up to 2.2nF - making it optimal for driving ADC reference inputs and buffered sensor interfaces without layout constraints.

Availability

MAX6025BEUR+T is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, energy metering systems, and battery-operated instrumentation requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6025BEUR+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX6025BEUR+T belongs to the MAX60xx family of precision series-mode voltage references designed specifically for low-power, high-accuracy measurement systems where supply independence, small size, and long-term stability are critical.

FAQ

What is the maximum input voltage rating for the MAX6025BEUR+T?

The MAX6025BEUR+T has an absolute maximum input voltage of +13.5V referenced to GND. Its operational input range is specified from (V_OUT + 0.2V) = 2.7V minimum to 12.6V maximum. Exceeding +13.5V may cause permanent damage. The device draws only 35μA quiescent current across this full range, with supply current varying by just 0.8μA per volt change in VIN - a key advantage of its series-mode architecture over shunt references.

Does the MAX6025BEUR+T require an external output capacitor for stability?

No, the MAX6025BEUR+T is internally compensated and stable with output capacitance ranging from 0 to 2.2nF - including no capacitor. This eliminates board area and BOM cost associated with external compensation. While optional capacitors improve transient response to step load changes, they are not required for frequency stability. The MAX6025BEUR+T's design specifically targets space-constrained applications like handheld test equipment and wearable sensors where every mm² matters.

What is the output voltage accuracy specification for the MAX6025BEUR+T over temperature?

The MAX6025BEUR+T guarantees ±0.40% initial accuracy at +25°C and a maximum temperature coefficient of 20ppm/°C over the full –40°C to +85°C operating range. This translates to a worst-case output deviation of ±0.5mV (2.500V × 0.004) plus ±0.4mV (2.500V × 20ppm × 125°C ΔT), totaling ≤±0.9mV error across temperature - sufficient for 12-bit systems and marginal for 14-bit designs without calibration. The MAX6025BEUR+T achieves this via curvature-corrected bandgap and laser-trimmed thin-film resistors.

Can the MAX6025BEUR+T sink and source current simultaneously?

No, the MAX6025BEUR+T operates in either sourcing or sinking mode depending on external circuit conditions - it cannot do both simultaneously. It delivers up to +500μA (source) or accepts up to –500μA (sink) from the OUT pin. In typical use, it sources current to bias ADC reference inputs or op-amp circuits; if the connected node pulls below 2.500V, the device sinks current to maintain regulation. Its bidirectional capability simplifies designs requiring dynamic load handling, such as multiplexed sensor front-ends where reference loading varies between channels.

How does the MAX6025BEUR+T compare to shunt voltage references in terms of power efficiency?

The MAX6025BEUR+T consumes only 35μA quiescent current independent of load - unlike shunt references that waste current through a series resistor even when no load is present. For example, a 2.5V shunt reference biased at 500μA would draw ≥500μA continuously, wasting >14× more power. The MAX6025BEUR+T's supply current varies by just 0.8μA/V with input voltage, enabling efficient operation across wide supply ranges (2.7V–12.6V) without redesign. This makes it ideal for battery longevity in portable instrumentation.