Analog Devices Inc./Maxim Integrated MAX6133AASA30+T

Overview

MAX6133AASA30+T from Maxim Integrated is a high-precision, low-power, low-dropout series voltage reference delivering 3.000V output with ±0.04% initial accuracy (A grade, SO package), 3ppm/°C max temperature coefficient, 200mV max dropout voltage, and 40µA quiescent current. It serves as a stable reference for high-resolution data converters in battery-powered instrumentation.

For engineers reviewing the MAX6133AASA30+T datasheet, MAX6133AASA30+T pinout, MAX6133AASA30+T application, or MAX6133AASA30+T equivalent, key selection criteria include guaranteed 3ppm/°C tempco over –40°C to +125°C, 15mA source capability, 0.05mV/mA load regulation, and SO-8 packaging compatible with industrial-grade PCB layouts.

Technical Context

The MAX6133AASA30+T uses bandgap-based series-mode architecture with laser-trimmed thin-film resistors and post-package trimming to achieve 0.04% initial accuracy and 3ppm/°C tempco. Its low 40µA supply current remains virtually independent of input voltage across 3.2V–12.6V operation.

It delivers 3.000V output with 0.06mV/mA max load regulation and 2µV/V max line regulation, enabling precision A/D and D/A conversion without external gain calibration. Thermal hysteresis is specified at 120ppm, and long-term stability is 40ppm over 1000 hours in SO package.

Key Specifications

Pinout & Package

MAX6133AASA30+T is housed in an 8-pin SO (SOICN) package per MS012 outline, with 150-mil body width, 1.27mm lead pitch, and gull-wing leads. Pin 1 is marked by notch or dot; pins 1, 3, and 7 are no-connect (NC); pins 5 and 8 are internally connected (IC) and must remain unconnected externally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the MAX6133AASA30+T provides superior 0.04% accuracy, 3ppm/°C tempco, and 15mA sourcing in an industry-standard SO-8 package-making it optimal for high-reliability, high-precision industrial and medical instrumentation where long-term stability and thermal robustness are mandatory.

Availability

MAX6133AASA30+T is available at Aetrix Electronics and suitable for precision regulators, A/D and D/A converters, and high-accuracy industrial process control requiring stable component supply across extended temperature ranges.

Supply support for MAX6133AASA30+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 and mixed-signal ICs for industrial, medical, and communications applications.

The MAX6133 series was developed specifically for high-accuracy, low-power voltage reference needs in portable instrumentation and data acquisition systems demanding tight tempco and long-term stability.

FAQ

What is the maximum load current supported by the MAX6133AASA30+T?

The MAX6133AASA30+T supports up to 15mA of output source current while maintaining specified accuracy and regulation. This capability eliminates the need for external buffer amplifiers in many precision applications, including driving ADC reference inputs and op-amp bias networks. The device's 200mV max dropout voltage ensures stable operation even at full 15mA load across its 3.2V–12.6V input range. Exceeding 15mA may degrade output voltage accuracy beyond datasheet limits.

Does the MAX6133AASA30+T require external capacitors, and if so, what values?

Yes, the MAX6133AASA30+T requires a minimum 0.1µF ceramic capacitor from OUT to GND for stability, and a 0.1µF ceramic capacitor from IN to GND is recommended for optimal line-transient performance. Both capacitors must be placed as close as possible to their respective pins. The device remains stable with output capacitance up to 100µF, allowing larger values to improve transient response in step-load applications. No capacitor is strictly required on IN if transient performance is not critical, but omission risks degraded line regulation.

How does the MAX6133AASA30+T perform over temperature, and what is its thermal hysteresis?

The MAX6133AASA30+T guarantees a maximum temperature coefficient of 3ppm/°C over –40°C to +125°C, ensuring <0.01% output drift across its full operating range. Its thermal hysteresis is specified at 120ppm - defined as the change in +25°C output voltage after cycling between –40°C and +125°C. This value is consistent across both SO and µMAX packages and reflects package-induced stress on the bandgap core. Long-term stability is 40ppm over 1000 hours in the SO package.

Can the MAX6133AASA30+T be used in negative reference applications?

Yes, the MAX6133AASA30+T can be configured as a negative reference using an external rail-to-rail op-amp such as the MAX400, as shown in Maxim's Figure 2 application circuit. In this configuration, the device's 3.000V output is inverted to generate a precise –3.000V reference without discrete resistors. This approach preserves the MAX6133AASA30+T's low noise and tempco characteristics while minimizing board area and component count in space-constrained designs.

What is the turn-on settling time specification for the MAX6133AASA30+T?

The MAX6133AASA30+T settles to within ±0.01% of its final 3.000V output in 600µs under typical conditions (VIN = 5V, C_OUT = 0.1µF, TA = +25°C). Settling time increases to ≤2ms under worst-case conditions - specifically at minimum dropout voltage and maximum 15mA load. This fast turn-on behavior supports power-gated systems and low-duty-cycle measurement architectures where rapid reference stabilization is essential for timing-critical conversions.