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Analog Devices Inc./Maxim Integrated MAX6133AASA50+
- Part No.:
- MAX6133AASA50+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6133AASA50+.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:143
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Product details
Overview
The MAX6133AASA50+ from Maxim Integrated is a precision series-mode voltage reference delivering 5.000V output with ±0.04% initial accuracy (max), 3ppm/°C temperature coefficient (max, -40°C to +125°C), and 200mV maximum dropout voltage - enabling stable operation in low-voltage, battery-powered instrumentation and high-resolution data acquisition systems.
For engineers reviewing the MAX6133AASA50+ datasheet, MAX6133AASA50+ pinout, MAX6133AASA50+ application, or MAX6133AASA50+ equivalent, key selection considerations include its SO-8 package, 40µA quiescent current, 15mA source capability, 40µV/V line regulation, and compatibility with 0.1µF–100µF output capacitors for transient-stable precision biasing.
Technical Context
The MAX6133AASA50+ employs bandgap-based series architecture with laser-trimmed thin-film resistors and post-package trimming to achieve 0.04% initial accuracy and ultra-low thermal drift. Its internal design eliminates external feedback components and supports direct connection to ADC/DAC reference inputs without buffering.
Operating across 5.2V–12.6V input range, it maintains 0.1% output stability over load currents from –100µA to +15mA and exhibits 40µV/V line regulation and 0.01–0.10mV/mA load regulation - confirming tight control of output voltage under dynamic supply and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.04% at +25°C - ensures ≤2mV absolute error for 14-bit DAC reference alignment. |
| Tempco | 3ppm/°C max (–40°C to +125°C) - limits drift to ≤1.5mV over full industrial temperature range. |
| Dropout Voltage | 200mV max at 10mA - enables operation from 5.2V supply with ≥300mV headroom for noise margin. |
| Quiescent Current | 40µA typical, ≤85µA over temperature - supports multi-year battery life in portable meters. |
| Line Regulation | 40µV/V max (5.2V–12.6V) - contributes <0.3mV error across full input range at 5V output. |
| Load Regulation | 0.01–0.10mV/mA - guarantees ≤1.5mV shift from no-load to 15mA sink, critical for sensor front-ends. |
| Output Noise | 40µVP-P (0.1Hz–10Hz), 26µVRMS (10Hz–1kHz) - preserves SNR in 16-bit+ measurement systems. |
| Supply Range | 5.2V to 12.6V - compatible with standard 5V/12V rails and regulated intermediate supplies. |
Pinout & Package
MAX6133AASA50+ uses an 8-pin SO (SOICN) package per JEDEC MS-012, 150-mil body width, with 1.27mm pitch. Pin 1 is top-left corner (notch/dot marked), and pins 5 & 8 are internally connected (do not connect externally).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 7 | No Connection (N.C.) | Unbonded pads - leave floating or tie to GND for mechanical stability; no electrical function. |
| 2 | IN | Positive supply input - requires ≥5.2V; accepts up to 13V absolute max; decouple with 0.1µF ceramic. |
| 4 | GND | Analog ground reference - star-point connection recommended to minimize noise coupling. |
| 5, 8 | I.C. (Internally Connected) | Internal bond wires - must remain unconnected; external connection risks damage or parametric shift. |
| 6 | OUT | 5.000V precision reference output - requires ≥0.1µF ceramic capacitor to GND; stable up to 100µF. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Tempco Architecture | 3ppm/°C max over –40°C to +125°C - achieved via bandgap core + laser-trimmed thin-film resistors and post-package trimming. |
| Ultra-Low Quiescent Current | 40µA typical, independent of input voltage - minimizes standby power in always-on portable instruments. |
| High Load Drive Capability | 15mA source current - eliminates need for external buffer in most 12–16-bit DAC/ADC reference applications. |
| Wide Input Voltage Range | 5.2V to 12.6V - accommodates unregulated 6V/9V/12V supplies while maintaining 5V reference accuracy. |
| Low-Noise Output | 40µVP-P (0.1Hz–10Hz) - enables sub-LSB stability in high-resolution weigh scales and precision RTD interfaces. |
| Thermal Hysteresis Control | 120ppm max - mitigated by matched die stress design, ensuring repeatable calibration after thermal cycling. |
Applications
| Portable Precision DMMs | Industrial 16-Bit Data Loggers |
|---|---|
|
Use Scenario: Handheld digital multimeters requiring stable 5V reference for dual-slope or sigma-delta ADCs across –10°C to +50°C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core, directly sourcing reference current without buffer. Use Value: 3ppm/°C tempco and 40µA supply current enable >6½-digit accuracy and >500-hour battery life on two AA cells. |
Use Scenario: Ruggedized field data loggers measuring thermocouples and strain gauges in oil/gas monitoring cabinets. IC Role / Device Role / Timing Role: Precision reference for simultaneous 16-bit SAR ADC channels, powering internal reference buffers. Use Value: 0.04% initial accuracy and 0.01mV/mA load regulation ensure channel-to-channel matching ≤0.005% FS across temperature. |
| Medical Patient Monitors | Automotive Battery Management ICs |
|
Use Scenario: ECG front-end modules where 5V reference feeds analog signal chain and ADC in ISO 13485-certified designs. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for PGA gain-setting and ADC reference, operating from 5.5V isolated rail. Use Value: 40µVP-P (0.1Hz–10Hz) noise and 120ppm thermal hysteresis support <1µV baseline stability for microvolt-level biopotential sensing. |
Use Scenario: BMS slave boards measuring cell voltages in 48V EV packs, where reference must survive –40°C cold cranking and +105°C under-hood conditions. IC Role / Device Role / Timing Role: Stable 5V reference for 12-bit delta-sigma ADCs monitoring individual Li-ion cell voltages. Use Value: Guaranteed 3ppm/°C tempco and 15mA drive capability allow direct ADC interfacing without layout-sensitive op-amp buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.0V, 3ppm/°C, 95µA IQ, SO-8 - higher quiescent current, superior long-term stability (15ppm/1000h vs. 40ppm). | Preferred in lab-grade equipment where aging matters more than battery life; less suitable for portable devices. | Select ADR4550BRZ when long-term calibration hold is prioritized over ultra-low power. |
| REF5050AIDR | 5.0V, 3ppm/°C, 1.1mA IQ, SO-8 - 27× higher supply current, 50mA drive, lower noise (12µVRMS). | Used in high-speed DAQ systems needing fast settling and heavy loading; incompatible with energy-constrained designs. | Choose REF5050AIDR only when driving multiple ADCs or requiring <10µs turn-on time. |
Compared with ADR4550BRZ and REF5050AIDR, the MAX6133AASA50+ uniquely balances ultra-low 40µA quiescent current, 15mA drive, and 3ppm/°C tempco in SO-8 - making it optimal for portable, battery-powered precision instruments where power, size, and stability are jointly constrained.
Availability
MAX6133AASA50+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial data loggers, and medical sensor interfaces requiring stable component supply with guaranteed long-term availability and traceable lot-level documentation.
Supply support for MAX6133AASA50+ 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, automotive, and communications markets.
The MAX6133AASA50+ belongs to Maxim's precision voltage reference product line, engineered specifically for applications demanding ultra-low drift, minimal power, and robust performance in harsh thermal environments.
FAQ
What is the maximum load current supported by the MAX6133AASA50+?
The MAX6133AASA50+ supports up to +15mA output source current and –100µA sink current, with guaranteed load regulation of 0.01–0.10mV/mA. This allows direct driving of ADC reference inputs, op-amp bias networks, and small logic loads without external buffering - confirmed in the Electrical Characteristics table for VOUT = 5.000V operation.
Does the MAX6133AASA50+ require an input capacitor?
The MAX6133AASA50+ does not require an input capacitor for stability, but a 0.1µF ceramic capacitor placed close to the IN pin significantly improves line-transient response. The datasheet explicitly states "bypassing is optional" and recommends this capacitor only when supply transients are present - making it design-optional rather than mandatory.
Can the MAX6133AASA50+ be used with output capacitances larger than 0.1µF?
Yes - the MAX6133AASA50+ is stable with output capacitances from 0.1µF up to 100µF, including ceramic, tantalum, and electrolytic types. Larger capacitors (e.g., 10µF) reduce overshoot during load transients, as demonstrated in Typical Operating Characteristics figures toc13–toc16. This wide capacitive tolerance simplifies filtering in noisy industrial environments.
What is the thermal hysteresis specification for the MAX6133AASA50+?
The MAX6133AASA50+ exhibits 120ppm maximum thermal hysteresis - defined as the change in output voltage at +25°C before and after cycling from –40°C to +125°C. This value is identical for both SO and µMAX packages and is measured per Note 3 in the datasheet, reflecting package-induced stress on the bandgap core.
Is the MAX6133AASA50+ pin-compatible with other MAX6133 variants?
Yes - all MAX6133 variants (including MAX6133AASA25+, MAX6133AASA30+, MAX6133AASA41+, and MAX6133AASA50+) share identical SO-8 pinout and package dimensions. Only the output voltage and grade-specific parameters (tempco, accuracy) differ; no PCB layout change is needed when swapping within the same package type.
MAX6133AASA50+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 7ppm/°C
- Noise - 0.1Hz to 10Hz:
- 40µVp-p
- Noise - 10Hz to 10kHz:
- 26µVrms
- Voltage - Input:
- 5.2V ~ 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
MAX6133AASA50+ FAQ
1.How can I place an order for MAX6133AASA50+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6133AASA50+ 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 MAX6133AASA50+ reliable?
The price and inventory of MAX6133AASA50+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6133AASA50+ is usually 5 days.
3.What payment methods are accepted for MAX6133AASA50+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6133AASA50+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6133AASA50+?
MAX6133AASA50+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6133AASA50+ 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 MAX6133AASA50+?
For technical support, including MAX6133AASA50+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6133AASA50+ requirements.
6.How does Aetrix verify that MAX6133AASA50+ is sourced from the original manufacturer or authorized distributors?
All MAX6133AASA50+ 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 MAX6133AASA50+ meets industry standards.
7.What is the process for return or replacement of MAX6133AASA50+?
All MAX6133AASA50+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6133AASA50+, 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 MAX6133AASA50+ part is unused and in its original packaging.
Return procedure for MAX6133AASA50+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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