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Analog Devices Inc./Maxim Integrated MAX6138AEXR50/GG8
- Part No.:
- MAX6138AEXR50/GG8
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6138AEXR50/GG8.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,571
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Product details
Overview
MAX6138AEXR50/GG8 from Maxim Integrated is a precision two-terminal shunt-mode bandgap voltage reference with a fixed 5.000V reverse breakdown voltage, 0.1% initial accuracy, and 25ppm/°C max temperature coefficient over –40°C to +85°C. It operates from 60µA to 15mA shunt current, delivers low 80µVRMS wideband noise (10Hz–10kHz), and is used in high-accuracy ADC/DAC biasing and portable power monitoring circuits.
For engineers reviewing the MAX6138AEXR50/GG8 datasheet, MAX6138AEXR50/GG8 pinout, MAX6138AEXR50/GG8 application, or MAX6138AEXR50/GG8 equivalent, key selection criteria include its SC70-3 package footprint, no-output-capacitor stability, ±120ppm long-term drift after 1000h, and guaranteed dynamic impedance ≤1.1Ω at 1mA.
Technical Context
The MAX6138AEXR50/GG8 implements a laser-trimmed BiCMOS bandgap core to achieve tight initial tolerance and low thermal drift. Its two-terminal architecture functions as a programmable current sink, regulating voltage across its anode–cathode terminals by dynamically adjusting shunt current in response to load variations.
It requires no external stabilization capacitor and remains stable with any capacitive load up to ≥1µF. The device's reverse dynamic impedance (≤1.1Ω) and low noise (80µVRMS) support high-resolution data conversion systems where reference integrity directly impacts ENOB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±0.005V at +25°C - enables direct interface with 5V-rail SAR ADCs without level-shifting. |
| Initial Accuracy | 0.1% max - eliminates need for system-level calibration in factory-set instrumentation. |
| Temp Coefficient | 25ppm/°C max over –40°C to +85°C - ensures <±0.5mV drift across full industrial range. |
| Shunt Current Range | 60µA to 15mA - supports ultra-low-power sensor nodes and high-current precision regulators. |
| Dynamic Impedance | ≤1.1Ω at 1mA - maintains voltage stability under fast load transients (e.g., ADC sampling bursts). |
| Wideband Noise | 80µVRMS (10Hz–10kHz) - preserves SNR in 16-bit+ data acquisition front-ends. |
| Long-Term Stability | ±120ppm after 1000h - guarantees reference integrity in unattended industrial logging systems. |
Pinout & Package
MAX6138AEXR50/GG8 is housed in a 3-pin SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is NC and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; defines reference voltage node. |
| Pin 2 (–) | Cathode / Negative Terminal | Connects to regulated output node; sinks shunt current to maintain 5.000V across terminals. |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal functionality or signal routing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - saves board space in compact battery-powered devices like wearables and IoT sensors. |
| No output capacitor required | Stable with 0–1µF capacitive loads - simplifies layout, reduces BOM count, and avoids capacitor aging effects. |
| Low dynamic impedance | ≤1.1Ω at 1mA - minimizes voltage droop during transient load steps in precision analog signal chains. |
| Guaranteed long-term stability | ±120ppm after 1000h - enables reliable operation in field-deployed equipment without recalibration. |
| Wide operating current range | 60µA to 15mA - accommodates both micropower sensor interfaces and high-speed DAC reference buffers. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG front-end measuring microvolt-level biopotentials with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Provides stable 5.000V reference for ADC full-scale range and analog front-end gain calibration. Use Value: 0.1% initial accuracy and 25ppm/°C TC ensure measurement repeatability across ambient temperature shifts in clinical environments. |
Use Scenario: Ruggedized environmental monitor logging temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Supplies reference voltage for precision ratiometric sensor excitation and ADC conversion in isolated analog input modules. Use Value: ±120ppm long-term drift and –40°C to +85°C operation guarantee consistent accuracy without field recalibration. |
| Handheld Test Equipment | Automotive Cabin Control Units |
Use Scenario: Portable multimeter with auto-ranging 16-bit ADC and dual-supply analog circuitry. IC Role / Device Role / Timing Role: Serves as primary voltage reference for measurement scaling and offset correction algorithms. Use Value: 80µVRMS noise floor and low dynamic impedance preserve resolution during rapid range switching and battery voltage sag. |
Use Scenario: HVAC control module requiring accurate thermistor and potentiometer readings in vehicle cabin electronics. IC Role / Device Role / Timing Role: Delivers stable 5.000V reference for microcontroller ADC inputs interfacing with analog sensors. Use Value: SC70-3 size enables dense PCB layouts; no-output-capacitor design improves reliability in thermally cycled automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | 2.5V adjustable (via resistors); 0.5% initial accuracy; 100ppm/°C TC; SOT23-3 package. | Requires external resistor network for 5V setting; higher drift limits use in high-precision metrology. | Select when cost sensitivity outweighs accuracy needs and board space allows SOT23-3. |
| ADR3450ARJZ-R7 | 5.0V series reference; 0.1% accuracy; 10ppm/°C TC; 65µA quiescent current; SOT23-5 package. | Three-terminal architecture requires dedicated supply rail; not compatible with shunt-based topologies. | Choose for ultra-low-drift applications where series topology and extra pin count are acceptable. |
Compared with TLVH431AIDBZR and ADR3450ARJZ-R7, MAX6138AEXR50/GG8 uniquely combines 0.1% accuracy, 25ppm/°C TC, and true two-terminal shunt operation in a subminiature SC70-3 package-enabling compact, capacitor-free designs where supply headroom is constrained.
Availability
MAX6138AEXR50/GG8 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and handheld test equipment requiring stable component supply with guaranteed long-term performance.
Supply support for MAX6138AEXR50/GG8 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 demanding industrial, medical, and communications applications.
The MAX6138 family delivers high-accuracy, low-drift shunt references in ultra-small packages for space-constrained, battery-operated, and high-reliability systems.
FAQ
What is the maximum shunt current rating for MAX6138AEXR50/GG8?
The MAX6138AEXR50/GG8 supports a continuous shunt current range of 60µA to 15mA. Absolute maximum reverse current is 20mA - exceeding this risks permanent damage. For reliable operation, design ISHUNT between 60µA and 15mA, ensuring RS sizing complies with [VS(MIN) − 5.0V] / [60µA + ILOAD(MAX)] > RS > [VS(MAX) − 5.0V] / [20mA + ILOAD(MIN)]. MAX6138AEXR50/GG8 maintains regulation within spec across this full range.
Does MAX6138AEXR50/GG8 require an external output capacitor?
No, MAX6138AEXR50/GG8 does not require an external output capacitor for stability. It is explicitly characterized and guaranteed stable with capacitive loads from 0 to ≥1µF. This eliminates capacitor-related aging, leakage, and layout sensitivity - a key advantage over many competing shunt references. MAX6138AEXR50/GG8 achieves this via internal compensation optimized for its BiCMOS bandgap core.
What is the long-term stability specification for MAX6138AEXR50/GG8?
MAX6138AEXR50/GG8 exhibits ±120ppm reverse breakdown voltage change after 1000 hours of operation under rated conditions. This long-term stability is measured at TA = +25°C and reflects typical parametric drift due to silicon stress relaxation and passivation effects. MAX6138AEXR50/GG8 maintains this spec across its full –40°C to +85°C operating range, supporting unattended deployment in industrial and medical systems.
Can MAX6138AEXR50/GG8 be used in series-reference configurations?
No, MAX6138AEXR50/GG8 is strictly a two-terminal shunt reference and cannot operate as a series reference. It must be connected between a positive supply and ground (or low-impedance node), sinking current to regulate voltage across its terminals. Attempting series configuration violates its electrical architecture. MAX6138AEXR50/GG8 requires proper source resistance (RS) calculation per the datasheet's bounding equation to ensure stable 5.000V regulation.
What is the noise performance of MAX6138AEXR50/GG8?
MAX6138AEXR50/GG8 delivers 80µVRMS wideband noise over 10Hz to 10kHz - measured at IR = 100µA. This low-noise characteristic is critical for high-resolution data converters; for example, it contributes <0.5 LSB error in a 16-bit 5V-full-scale ADC. Noise remains stable across the operating current range, and MAX6138AEXR50/GG8 includes on-chip filtering to suppress high-frequency artifacts that could alias into baseband measurements.
MAX6138AEXR50/GG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6138AEXR50/GG8 FAQ
1.How can I place an order for MAX6138AEXR50/GG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6138AEXR50/GG8 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 MAX6138AEXR50/GG8 reliable?
The price and inventory of MAX6138AEXR50/GG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6138AEXR50/GG8 is usually 5 days.
3.What payment methods are accepted for MAX6138AEXR50/GG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6138AEXR50/GG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6138AEXR50/GG8?
MAX6138AEXR50/GG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6138AEXR50/GG8 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 MAX6138AEXR50/GG8?
For technical support, including MAX6138AEXR50/GG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6138AEXR50/GG8 requirements.
6.How does Aetrix verify that MAX6138AEXR50/GG8 is sourced from the original manufacturer or authorized distributors?
All MAX6138AEXR50/GG8 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 MAX6138AEXR50/GG8 meets industry standards.
7.What is the process for return or replacement of MAX6138AEXR50/GG8?
All MAX6138AEXR50/GG8 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6138AEXR50/GG8, 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 MAX6138AEXR50/GG8 part is unused and in its original packaging.
Return procedure for MAX6138AEXR50/GG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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