Analog Devices Inc./Maxim Integrated MAX6008BESA

Overview

MAX6008BESA from Maxim Integrated is a precision 2.5V two-terminal shunt voltage reference in an 8-pin SO package, designed for ultra-low-power, space-constrained systems. It delivers initial accuracy of ±0.5%, temperature coefficient of 75ppm/°C over –40°C to +85°C, and guaranteed minimum operating current <1µA. It serves as a plug-in upgrade for LM285 in precision regulator and portable meter applications.

For engineers reviewing the MAX6008BESA datasheet, MAX6008BESA pinout, MAX6008BESA application, or MAX6008BESA equivalent, key selection factors include its 2.5V output stability under sub-1µA bias, SO-package compatibility with legacy LT1004/LM285 footprints, low-frequency noise (60µV_P-P), and thermal hysteresis performance (200ppm).

Technical Context

The MAX6008BESA implements a laser-trimmed series bandgap core with on-chip thin-film resistors, enabling factory-set 2.500V output with ±0.5% initial tolerance. Its two-terminal architecture requires external biasing via RBIAS to maintain operation between 0.5µA and 2mA.

It operates as a shunt regulator-sinking current to stabilize voltage across a load-rather than sourcing current like series references. Output impedance remains ≤2Ω from 1.2µA to 2mA, and low-frequency (0.1Hz–10Hz) noise is specified at 60µV_P-P, supporting high-resolution ADC/DAC reference applications.

Key Specifications

Pinout & Package

MAX6008BESA uses an 8-pin SO (Small Outline) package, pin-compatible with legacy LT1004 and LM285 SO variants. Pin 1 is OUT, Pin 2 is GND, Pins 3, 5, and 7 are no-connect (N.C.), and Pins 4, 6, and 8 are also N.C. The device requires external bypass capacitance ≥0.01µF from OUT to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM285DR-2.5 and LT1004CD-2.5, MAX6008BESA uniquely balances 0.5% accuracy, 8-pin SO plug-in compatibility, sub-1µA operation, and 60µV_P-P noise-making it optimal for next-generation portable instrumentation where size, power, and resolution converge.

Availability

MAX6008BESA is available at Aetrix Electronics and suitable for portable meters, precision regulators, and A/D converter reference applications requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for MAX6008BESA 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.

The MAX6006–MAX6009 family was engineered specifically for ultra-low-power, high-accuracy shunt reference needs in battery-operated and space-constrained instrumentation-emphasizing sub-microamp operation, laser-trimmed stability, and drop-in upgrade capability.

FAQ

What is the guaranteed minimum operating current for MAX6008BESA?

The MAX6008BESA guarantees a minimum operating current of 0.5µA, with typical performance down to 1.0µA. This specification ensures stable 2.5V output even under ultra-low-bias conditions-critical for energy harvesting and coin-cell-powered devices. The MAX6008BESA maintains <0.2% output deviation across this range, validated per datasheet test conditions at TA = +25°C.

Is MAX6008BESA pin-compatible with LT1004 in 8-pin SO packages?

Yes, MAX6008BESA is explicitly designed as a plug-in upgrade for LT1004 in 8-pin SO packages. Pin 1 (OUT) and Pin 2 (GND) match LT1004's functional pinout, while all other pins are no-connect-enabling direct replacement without PCB modification. This compatibility is confirmed in Maxim's Ordering Information table and Pin Description section.

What is the low-frequency noise specification for MAX6008BESA?

MAX6008BESA exhibits 60µV_P-P low-frequency noise over the 0.1Hz to 10Hz bandwidth, measured at 1.2µA bias current. This value is specified in the Electrical Characteristics table for MAX6008B and directly supports high-resolution data acquisition systems where reference noise dominates system ENOB. The MAX6008BESA achieves this with optimized bandgap core design and internal trimming.

Does MAX6008BESA require an external bypass capacitor?

Yes, MAX6008BESA requires a minimum 0.01µF capacitor from OUT to GND, as stated in the Applications Information section. This capacitor stabilizes the reference against load transients and reduces overshoot during turn-on. Larger values (e.g., 0.1µF) are recommended in systems with step-load changes, and the MAX6008BESA's low dynamic impedance (≤2Ω) ensures effective decoupling without resonance issues.

How does the temperature coefficient of MAX6008BESA compare to the 'A' grade variant?

MAX6008BESA has a maximum temperature coefficient of 75ppm/°C, whereas the MAX6008AESA+ variant specifies 30ppm/°C. This difference reflects tighter laser trimming in the 'A' grade, resulting in ~2.5× lower thermal drift. For applications operating across –40°C to +85°C where output shift must stay below ±0.1mV, the 'A' grade is preferred-but MAX6008BESA remains suitable for cost-sensitive industrial sensors where ±0.25mV drift is acceptable.