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Analog Devices Inc./Maxim Integrated MAX6133AASA25+
- Part No.:
- MAX6133AASA25+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6133AASA25+.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:594
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Product details
Overview
The MAX6133AASA25+ from Maxim Integrated is a precision series voltage reference delivering 2.500V output with ±0.04% (max) initial accuracy, 3ppm/°C (max) temperature coefficient over –40°C to +125°C, and 200mV (max) dropout voltage. It operates from 2.7V to 12.6V supply, draws only 40µA quiescent current, and supports up to 15mA source current - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the MAX6133AASA25+ datasheet, MAX6133AASA25+ pinout, MAX6133AASA25+ application, or MAX6133AASA25+ equivalent, key selection criteria include guaranteed low-tempco performance in SO package, sub-200mV dropout at full load, 16µVP-P (0.1Hz–10Hz) noise, and compatibility with space-constrained industrial and battery-powered systems requiring stable 2.5V reference rails.
Technical Context
The MAX6133AASA25+ is a bandgap-based series-mode voltage reference using laser-trimmed thin-film resistors and post-package trimming to achieve 0.04% initial accuracy. Its architecture eliminates external components required by shunt references and enables operation down to 2.7V input while maintaining regulation across –40°C to +125°C.
It delivers 2.500V output with 30µV/V (max) line regulation and 0.05mV/mA (max) load regulation, supporting precision analog signal chains where supply ripple rejection and load-step immunity are critical. Thermal hysteresis is specified at 120ppm, and long-term stability is 40ppm over 1000 hours in SO package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.010V at +25°C - ensures 14-bit DAC reference error remains <1 LSB over full temp range |
| Initial Accuracy | ±0.04% (max) - eliminates need for system-level calibration in portable test equipment |
| Tempco | 3ppm/°C (max), –40°C to +125°C - meets 16-bit data converter stability requirements across extended industrial range |
| Dropout Voltage | 200mV (max) at 10mA - enables operation from 2.7V supply while maintaining regulation for low-voltage microcontrollers |
| Quiescent Current | 40µA (typ), independent of input voltage - extends battery life in handheld instruments beyond 10 years at µA-level sleep currents |
| Output Noise | 16µVP-P (0.1Hz–10Hz) - preserves SNR in 24-bit delta-sigma ADC front-ends without additional filtering |
| Load Regulation | 0.05mV/mA (max), –100µA to +15mA - maintains reference integrity during dynamic sensor excitation or multiplexed channel switching |
Pinout & Package
MAX6133AASA25+ is housed in an 8-pin SO (SOIC-N) package measuring 4.90mm × 3.90mm × 1.75mm, with gull-wing leads and 1.27mm pitch. The package is RoHS-compliant and rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 7 | No Connection (N.C.) | Internally unconnected - must remain floating or tied to GND per layout best practice; no electrical function |
| 2 | IN | Positive supply input - accepts 2.7V to 12.6V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin |
| 4 | GND | Analog ground reference - serves as return path for reference output and internal bandgap core; must be low-impedance |
| 5, 8 | I.C. | Internally connected - not for external use; must remain unconnected to avoid parasitic coupling or latch-up |
| 6 | OUT | 2.500V precision reference output - requires ≥0.1µF ceramic capacitor to GND for stability; supports up to 15mA source current |
Key Features
| Feature | Design Value |
|---|---|
| Low-tempco SO package | 3ppm/°C max over –40°C to +125°C - enables single-reference design for wide-temperature industrial controllers without derating |
| Ultra-low quiescent current | 40µA typical, supply-voltage independent - allows direct connection to battery rails in always-on IoT sensors |
| Low-noise bandgap core | 16µVP-P (0.1Hz–10Hz) - avoids noise-induced quantization errors in precision weigh-scale and medical ECG front-ends |
| High load drive capability | 15mA source current - drives multiple SAR ADC references or op-amp buffers without external gain stages |
| Wide input voltage range | 2.7V to 12.6V - accommodates Li-ion, 3.3V, 5V, and 12V system rails without discrete regulators |
Applications
| Portable Data Acquisition | Industrial Process Transmitters |
|---|---|
|
Use Scenario: Handheld multimeter with 6½-digit resolution operating on dual AA cells. IC Role / Device Role / Timing Role: Primary 2.5V reference for 24-bit sigma-delta ADC and internal DAC calibration. Use Value: 3ppm/°C tempco and 16µVP-P noise ensure <1ppm measurement drift over 0–50°C ambient, meeting IEC 61000-4-30 Class A accuracy. |
Use Scenario: 4–20mA HART-enabled pressure transmitter in oil & gas field enclosures. IC Role / Device Role / Timing Role: Stable reference for ratiometric bridge sensor excitation and ADC conversion under –40°C to +85°C ambient. Use Value: 0.04% initial accuracy and 120ppm thermal hysteresis enable factory calibration validity for 5+ years without recalibration. |
| Medical Patient Monitoring | Automotive Battery Management |
|
Use Scenario: Portable ECG module with 500nV input-referred noise requirement. IC Role / Device Role / Timing Role: Low-noise 2.5V reference for PGA and ADC in analog front-end. Use Value: 16µVP-P (0.1Hz–10Hz) noise contributes <0.5% of total system noise floor, preserving diagnostic ST-segment fidelity. |
Use Scenario: BMS cell voltage monitor IC requiring precise 2.5V reference for 16-bit SAR ADCs across 12-cell packs. IC Role / Device Role / Timing Role: High-stability reference for simultaneous cell voltage sampling under 12V automotive supply with load dump transients. Use Value: 200mV dropout and 30µV/V line regulation maintain reference accuracy during cold-crank (6.5V) and load-dump (18V) events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5V, ±0.02% initial accuracy, 2ppm/°C tempco, 950µA quiescent current, SO-8 | Higher power consumption limits use in battery-operated devices; superior accuracy suits metrology-grade calibrators | Select ADR4525BRZ when absolute initial accuracy outweighs battery life; MAX6133AASA25+ preferred for µA-power systems |
| REF5025ID | 2.5V, ±0.05% initial accuracy, 3ppm/°C tempco, 950µA quiescent current, SO-8 | Higher supply current and larger die size increase thermal drift sensitivity in compact PCB layouts | REF5025ID offers TI's enhanced ESD robustness but lacks MAX6133AASA25+'s ultra-low IQ for energy harvesting nodes |
Compared with ADR4525BRZ and REF5025ID, the MAX6133AASA25+ uniquely balances 0.04% accuracy, 3ppm/°C tempco, and 40µA supply current - enabling high-precision reference functionality in space- and power-constrained designs where alternatives require >20× more quiescent power.
Availability
MAX6133AASA25+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial process transmitters, medical patient monitoring, and automotive battery management requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6133AASA25+ 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 MAX6133AASA25+ belongs to Maxim's high-accuracy series voltage reference product line, engineered specifically for portable and communication systems needing low-power, low-dropout, and ultra-stable reference performance in compact SO packages.
FAQ
What is the maximum load current supported by the MAX6133AASA25+?
The MAX6133AASA25+ supports up to 15mA of output source current while maintaining specified accuracy and regulation. This capability allows it to directly drive multiple ADC references, op-amp buffers, or precision DACs without external amplification - a key advantage over micropower shunt references limited to sub-mA loads.
Does the MAX6133AASA25+ require external capacitors for stability?
Yes, the MAX6133AASA25+ requires a minimum 0.1µF ceramic capacitor from OUT to GND for stability and is stable with output capacitance up to 100µF. An optional 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.
What is the operating temperature range for the MAX6133AASA25+?
The MAX6133AASA25+ is fully specified over –40°C to +125°C ambient temperature. Its 3ppm/°C maximum temperature coefficient and 120ppm thermal hysteresis are guaranteed across this full industrial range, making it suitable for under-hood automotive, outdoor industrial, and aerospace-qualified applications.
How does the MAX6133AASA25+ compare to shunt voltage references in terms of power efficiency?
As a series-mode reference, the MAX6133AASA25+ draws only 40µA quiescent current - independent of load - whereas shunt references waste current through a series resistor even at zero load. This architecture saves system power, reduces thermal dissipation, and eliminates the need for external resistors, simplifying BOM and layout for battery-powered systems.
Can the MAX6133AASA25+ be used to generate a negative reference voltage?
Yes, the MAX6133AASA25+ can be used with an external rail-to-rail op-amp (e.g., MAX400) to create a precision negative reference, as shown in Figure 2 of the datasheet. This configuration leverages the MAX6133AASA25+'s low noise and stability to produce a clean –2.5V output without resistive dividers, minimizing cost and board area in space-constrained designs.
MAX6133AASA25+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.04%
- 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-SOIC
MAX6133AASA25+ FAQ
1.How can I place an order for MAX6133AASA25+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6133AASA25+ 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 MAX6133AASA25+ reliable?
The price and inventory of MAX6133AASA25+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6133AASA25+ is usually 5 days.
3.What payment methods are accepted for MAX6133AASA25+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6133AASA25+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6133AASA25+?
MAX6133AASA25+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6133AASA25+ 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 MAX6133AASA25+?
For technical support, including MAX6133AASA25+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6133AASA25+ requirements.
6.How does Aetrix verify that MAX6133AASA25+ is sourced from the original manufacturer or authorized distributors?
All MAX6133AASA25+ 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 MAX6133AASA25+ meets industry standards.
7.What is the process for return or replacement of MAX6133AASA25+?
All MAX6133AASA25+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6133AASA25+, 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 MAX6133AASA25+ part is unused and in its original packaging.
Return procedure for MAX6133AASA25+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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