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Analog Devices Inc./Maxim Integrated MAX6133A25+T
- Part No.:
- MAX6133A25+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6133A25+T.pdf
- Description:
- IC VREF SERIES 0.06% 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
The MAX6133A25+T from Maxim Integrated is a high-precision, low-power, low-dropout series voltage reference delivering 2.500V output with ±0.04% initial accuracy (max), 3ppm/°C temperature coefficient (max), and 200mV dropout voltage (max) in an 8-pin SO package. It consumes only 40µA quiescent current and supports up to 15mA source current - ideal for precision A/D and D/A converters in battery-powered instrumentation.
For engineers reviewing the MAX6133A25+T datasheet, MAX6133A25+T pinout, MAX6133A25+T application, or MAX6133A25+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for precision voltage reference selection in industrial, medical, and portable measurement systems.
Technical Context
The MAX6133A25+T is a bandgap-based series-mode voltage reference using laser-trimmed thin-film resistors and post-package trimming to achieve ±0.04% initial accuracy and 3ppm/°C tempco over –40°C to +125°C. Its architecture eliminates external biasing components and enables stable operation with 0.1µF–100µF output capacitance.
It operates from 2.7V to 12.6V input, maintains 0.05mV/mA load regulation (max) and 30µV/V line regulation (max), and delivers low-noise performance: 16µVP-P (0.1Hz–10Hz) at 2.5V output. Turn-on settling time is ≤500µs to ±0.01% final value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.010V (±0.04% max at +25°C) - ensures <1 LSB error in 14-bit ADCs over full temp range |
| Initial Accuracy | ±0.04% (max at +25°C) - achieved via laser trimming and post-package adjustment for production consistency |
| Tempco | 3ppm/°C (max, –40°C to +125°C) - meets 16-bit converter stability requirements across extended industrial range |
| Dropout Voltage | 200mV (max at 10mA load) - enables operation from 2.7V supply while maintaining 2.5V reference |
| Quiescent Current | 40µA (typ, +25°C), ≤85µA (max, –40°C to +125°C) - extends battery life in handheld meters and sensor nodes |
| Output Noise | 16µVP-P (0.1Hz–10Hz), 12µVRMS (10Hz–1kHz) - minimizes quantization noise in high-resolution data acquisition |
| Load Regulation | 0.05mV/mA (max, –100µA to +15mA) - holds output stable under dynamic DAC or ADC load switching |
Pinout & Package
MAX6133A25+T is housed in an 8-pin SOIC (SO) package (JEDEC MS-012, 150-mil width), with 1.27mm pitch, 4.9mm × 3.9mm footprint, and 1.75mm max height. Pin 1 is marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 7 | No Connection (N.C.) | Internally unconnected - must remain floating or tied to GND; no electrical function |
| 2 | IN | Positive supply input - accepts 2.7V–12.6V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin |
| 4 | GND | Analog ground reference - common return for IN, OUT, and load; separate from digital ground in mixed-signal PCBs |
| 5, 8 | I.C. | Internally connected - not for external use; leave unconnected per datasheet |
| 6 | OUT | Precision 2.500V reference output - requires ≥0.1µF ceramic capacitor to GND for stability; drives up to 15mA |
Key Features
| Feature | Design Value |
|---|---|
| Low-tempco bandgap core | 3ppm/°C max over –40°C to +125°C - enables single-reference calibration across full operating range |
| Series-mode architecture | No external current-setting resistor required - reduces BOM count and layout area vs. shunt references |
| Ultra-low quiescent current | 40µA typical, independent of VIN - allows direct connection to microcontroller VDD rails without loading |
| Wide input voltage range | 2.7V to 12.6V - supports operation from Li-ion, 3.3V, or 5V supplies without LDO pre-regulation |
| Capacitive load stability | Stable with 0.1µF to 100µF output capacitance - accommodates both low-ESR ceramics and bulk tantalum for transient immunity |
Applications
| Portable Digital Multimeters | Industrial 4–20mA Transmitters |
|---|---|
|
Use Scenario: Handheld DMM measuring DC voltage with 0.1% basic accuracy and 4½-digit resolution. IC Role / Device Role / Timing Role: Primary 2.5V reference for 16-bit SAR ADC and internal calibration circuitry. Use Value: ±0.04% initial accuracy and 3ppm/°C tempco ensure factory calibration remains valid over 2-year service interval without recalibration. |
Use Scenario: Loop-powered transmitter converting RTD or thermocouple signals to 4–20mA output in hazardous environments. IC Role / Device Role / Timing Role: Stable excitation and reference source for precision instrumentation amplifier and DAC stages. Use Value: 200mV dropout and 40µA supply current enable operation directly from 12V loop supply with minimal self-heating and drift. |
| Medical Patient Monitoring | Automated Test Equipment (ATE) |
|
Use Scenario: ECG front-end with 24-bit delta-sigma ADC requiring ultra-low-noise analog reference. IC Role / Device Role / Timing Role: Low-noise 2.5V reference for ADC and programmable gain amplifier (PGA). Use Value: 16µVP-P (0.1Hz–10Hz) noise floor prevents degradation of ECG signal SNR below 1µV amplitude. |
Use Scenario: Modular ATE system performing DC parametric tests on ICs with ±0.01% absolute voltage accuracy requirement. IC Role / Device Role / Timing Role: Master reference for multi-channel precision source-measure units (SMUs). Use Value: 0.05mV/mA load regulation and thermal hysteresis ≤120ppm ensure repeatability across thousands of test cycles without drift-induced false fails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425ARZ | 2.5V, ±0.1% initial accuracy, 10ppm/°C tempco, 3.5µA quiescent current, SOT-23-5 | Lower power but higher tempco and accuracy tolerance - suitable for cost-sensitive, non-critical 12-bit systems | Select when ultra-low IQ dominates over long-term stability and tempco; verify layout for thermal coupling in high-density boards |
| REF5025AID | 2.5V, ±0.05% initial accuracy, 3ppm/°C tempco, 950µA quiescent current, SO-8 | Higher drive strength (50mA) and better PSRR, but 24× higher supply current - suited for high-speed DAC buffers | Select when driving heavy capacitive loads (>1nF) or requiring >100dB PSRR at 10kHz; avoid in battery-constrained designs |
Compared with ADR3425ARZ, MAX6133A25+T offers tighter initial accuracy and lower tempco at modest IQ penalty; compared with REF5025AID, it achieves similar precision with 24× lower quiescent current, making it optimal for always-on portable instrumentation where standby power matters.
Availability
MAX6133A25+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 and long product lifecycles.
Supply support for MAX6133A25+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 high-performance analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6133A25+T belongs to Maxim's precision voltage reference product line, engineered specifically for applications requiring sub-0.1% accuracy, low drift, and minimal power consumption in space-constrained environments.
FAQ
What is the maximum load current supported by the MAX6133A25+T?
The MAX6133A25+T supports up to 15mA of output source current while maintaining specified accuracy and regulation. Load regulation is guaranteed at 0.05mV/mA (max) over –100µA to +15mA, and dropout voltage remains ≤200mV at 10mA. Exceeding 15mA may cause output deviation beyond datasheet limits and increased thermal drift.
Can the MAX6133A25+T operate from a 3.3V supply?
Yes, the MAX6133A25+T operates from 2.7V to 12.6V input, so a 3.3V supply is fully supported. With its 200mV (max) dropout voltage, it delivers a stable 2.500V output at ≥3.3V – 0.2V = 3.1V headroom - well within specification. No additional LDO or regulator is needed.
Is the MAX6133A25+T pin-compatible with other MAX6133 variants?
Yes, all MAX6133 variants - including MAX6133A30+T, MAX6133A41+T, and MAX6133A50+T - share identical 8-pin SO packaging and pinout. Only the output voltage and grade-specific parameters (initial accuracy, tempco) differ; PCB layout and footprint are interchangeable across the family.
What output capacitor value is required for stability with the MAX6133A25+T?
The MAX6133A25+T requires a minimum 0.1µF ceramic capacitor from OUT to GND for stability and is stable with output capacitance up to 100µF. For best line-transient response, place the 0.1µF capacitor as close as possible to the OUT and GND pins. Larger values (e.g., 10µF) improve load-step immunity but do not affect DC stability.
Does the MAX6133A25+T require input capacitance?
Input capacitance is optional but recommended: a 0.1µF ceramic capacitor from IN to GND improves line-transient rejection and should be placed adjacent to the IN pin. The device functions without it when supply ripple and transients are minimal, but omitting it risks degraded PSRR and potential instability under fast input voltage steps.
MAX6133A25+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 7ppm/°C
- Noise - 0.1Hz to 10Hz:
- 16µVp-p
- Noise - 10Hz to 10kHz:
- 12µVrms
- Voltage - Input:
- 2.7V ~ 12.6V
- Current - Supply:
- 85µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX6133A25+T FAQ
1.How can I place an order for MAX6133A25+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6133A25+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6133A25+T reliable?
The price and inventory of MAX6133A25+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6133A25+T is usually 5 days.
3.What payment methods are accepted for MAX6133A25+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6133A25+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6133A25+T?
MAX6133A25+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6133A25+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6133A25+T?
For technical support, including MAX6133A25+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6133A25+T requirements.
6.How does Aetrix verify that MAX6133A25+T is sourced from the original manufacturer or authorized distributors?
All MAX6133A25+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6133A25+T meets industry standards.
7.What is the process for return or replacement of MAX6133A25+T?
All MAX6133A25+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6133A25+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6133A25+T part is unused and in its original packaging.
Return procedure for MAX6133A25+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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