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Analog Devices Inc./Maxim Integrated MAX6068BEUR
- Part No.:
- MAX6068BEUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6068BEUR.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,542
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Product details
Overview
MAX6068BEUR from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 1.80V output with ±0.39% initial accuracy and 20ppm/°C max temperature coefficient over –40°C to +85°C. It sources up to 5mA or sinks 2mA, draws only 90µA typical supply current, and operates from 2.5V to 12.6V input. It is used in high-accuracy ADC biasing, portable battery-powered instrumentation, and low-voltage precision power rails.
For engineers reviewing the MAX6068BEUR datasheet, MAX6068BEUR pinout, MAX6068BEUR application, or MAX6068BEUR equivalent, this page delivers verified specifications, SOT23-3 terminal mapping, real-world use cases in battery-constrained systems, and validated alternative options for voltage reference selection.
Technical Context
The MAX6068BEUR employs a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve ultra-low drift and high initial accuracy. Its internal compensation eliminates need for external capacitors, enabling stable operation with capacitive loads up to 1µF.
As a three-terminal series-mode reference, it features supply-current independence (≤8µA/V variation), 200mV max dropout at 1mA load, and 86dB PSRR at 120Hz - making it suitable for noisy, low-headroom, battery-operated environments where shunt references would waste power or require external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V (±0.39% initial accuracy at +25°C; ensures precise ADC full-scale calibration) |
| Tempco | 20ppm/°C (max) over –40°C to +85°C; enables <±0.15% total drift across industrial temp range) |
| Quiescent Current | 90µA (typ); supports >1-year battery life in 10µA-average IoT sensor nodes |
| Dropout Voltage | 200mV (max) at 1mA load; allows operation from single Li-ion cell down to 2.5V input |
| Load Drive | ±2mA sink / +5mA source capability; directly biases SAR ADC reference inputs and op-amp VREF pins |
| Noise (0.1–10Hz) | 22µVp-p; contributes <0.007 LSB error in 16-bit 1.8V ADC systems |
| PSRR | 86dB at 120Hz; rejects ripple from switching regulators feeding analog subsystems |
Pinout & Package
MAX6068BEUR is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 0.8mm footprint and 0.95mm height. Pin 1 is IN, Pin 2 is OUT, Pin 3 is GND - compatible with standard SOT23 pick-and-place tooling and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.5V–12.6V; requires no external series resistor; bypass with 0.1µF ceramic if line transients present |
| 2 (OUT) | Precision reference output | 1.80V regulated node; stable without output capacitor; drives capacitive loads up to 1µF |
| 3 (GND) | Analog ground reference | Must be connected to clean system AGND; shared return path for IN and OUT currents |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Internally compensated architecture eliminates need for output stability capacitor - saves PCB area in space-constrained wearables |
| Ultra-low quiescent current | 90µA typical, ≤8µA/V supply variation - enables direct connection to coin-cell batteries without efficiency penalty |
| High output drive | +5mA source / –2mA sink - eliminates need for external buffer op-amps when driving ADC reference inputs or DAC bias networks |
| Low dropout | 200mV max at 1mA - supports operation from partially discharged 2.5V LiFePO₄ or single Alkaline cells |
| Stable with capacitive loads | Guaranteed stability with 0–1µF output capacitance - simplifies layout in mixed-signal systems with decoupled analog domains |
Applications
| Portable DMM Front-End | IoT Sensor Node ADC Reference |
|---|---|
|
Use Scenario: Handheld digital multimeter measuring mV–10V ranges with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 1.80V reference for ADC conversion, replacing less accurate bandgap references. Use Value: ±0.39% initial accuracy and 20ppm/°C tempco ensure <±0.02% total measurement error across operating temperature. |
Use Scenario: Battery-powered environmental sensor node sampling temperature/humidity at 1Sa/s using 12-bit SAR ADC. IC Role / Device Role / Timing Role: Supplies low-noise, low-power reference for ADC and analog front-end comparators. Use Value: 22µVp-p (0.1–10Hz) noise and 90µA supply current extend CR2032 battery life beyond 2 years in sleep-active cycling. |
| Notebook System Power Monitor | Industrial 3.3V/1.8V Rail Calibration |
|
Use Scenario: Real-time monitoring of CPU core voltage (1.0–1.3V) and memory rail (1.2V) via precision ADC in laptop EC firmware. IC Role / Device Role / Timing Role: Generates 1.80V reference for ratiometric measurement of rail divider outputs. Use Value: 86dB PSRR suppresses switching noise from nearby buck converters, improving voltage reading resolution by 3–4 bits. |
Use Scenario: Factory calibration of programmable power supplies generating 3.3V and 1.8V rails for FPGA I/O banks. IC Role / Device Role / Timing Role: Serves as traceable 1.80V standard for automated test equipment during production trim. Use Value: 130ppm hysteresis and 62ppm/1000hr long-term stability ensure calibration validity over 6-month shelf life before deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3418BRJZ-R7 | 1.80V output, ±0.1% initial accuracy, 30ppm/°C max tempco, 120µA supply current, SOT23-3 | Higher accuracy but higher quiescent current; requires 1µF output cap for stability | Select when tighter initial tolerance is critical and board space permits capacitor placement |
| REF3018AIDBZR | 1.80V output, ±0.2% initial accuracy, 50ppm/°C max tempco, 50µA supply current, SOT23-3 | Lower supply current but worse tempco and noise (35µVp-p); not internally compensated | Select for ultra-low-power applications where moderate drift is acceptable and external compensation is feasible |
Compared with ADR3418BRJZ-R7 and REF3018AIDBZR, the MAX6068BEUR offers the best balance of low dropout (200mV), capacitor-free operation, and industrial-grade tempco - making it optimal for compact, battery-fed precision measurement systems where layout area and thermal stability are jointly constrained.
Availability
MAX6068BEUR is available at Aetrix Electronics and suitable for portable DMMs, IoT sensor nodes, notebook power monitors, and industrial rail calibration systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6068BEUR 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 and mixed-signal ICs for precision, power, and interface applications - with emphasis on miniaturization, energy efficiency, and ruggedness.
The MAX6061–MAX6068 family was engineered specifically for space- and power-constrained systems needing high-accuracy, low-dropout, micropower voltage references in ultra-small SOT23 packages - targeting portable instrumentation, battery-powered sensors, and embedded control.
FAQ
What is the maximum input voltage rating for MAX6068BEUR?
The absolute maximum input voltage for MAX6068BEUR is +13.5V referenced to GND. However, the specified operating range is 2.5V to 12.6V per the datasheet's electrical characteristics table. Operation above 12.6V may violate line regulation specs and is not guaranteed across temperature.
Does MAX6068BEUR require an output capacitor for stability?
No, MAX6068BEUR does not require an output capacitor for stability due to its internally compensated design. It remains stable with 0–1µF capacitive loads. An optional 0.1µF ceramic capacitor may be added to improve transient response in high-dynamic-load applications.
What is the dropout voltage specification for MAX6068BEUR at full load?
MAX6068BEUR has a maximum dropout voltage of 200mV at 1mA load current. At 5mA source load, dropout increases slightly but remains within 250mV - enabling reliable operation from 2.5V input even under full load conditions.
How does the temperature coefficient of MAX6068BEUR compare to MAX6061?
Both MAX6068BEUR and MAX6061 share identical temperature coefficient specifications: 20ppm/°C (max) for grade A, 30ppm/°C (max) for grade B. This consistency across the MAX6061–MAX6068 family is achieved via the same curvature-correction and laser-trimming process.
Can MAX6068BEUR sink current, and what is its maximum sink capability?
Yes, MAX6068BEUR can sink up to 2mA of load current, as confirmed in the "Load Regulation" section of its electrical characteristics table. This bidirectional capability supports active pull-down in precision bias networks and reference buffering circuits.
MAX6068BEUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.39%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 22µVp-p
- Noise - 10Hz to 10kHz:
- 25µVrms
- Voltage - Input:
- 2.5V ~ 12.6V
- Current - Supply:
- 125µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6068BEUR FAQ
1.How can I place an order for MAX6068BEUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6068BEUR 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 MAX6068BEUR reliable?
The price and inventory of MAX6068BEUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6068BEUR is usually 5 days.
3.What payment methods are accepted for MAX6068BEUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6068BEUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6068BEUR?
MAX6068BEUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6068BEUR 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 MAX6068BEUR?
For technical support, including MAX6068BEUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6068BEUR requirements.
6.How does Aetrix verify that MAX6068BEUR is sourced from the original manufacturer or authorized distributors?
All MAX6068BEUR 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 MAX6068BEUR meets industry standards.
7.What is the process for return or replacement of MAX6068BEUR?
All MAX6068BEUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6068BEUR, 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 MAX6068BEUR part is unused and in its original packaging.
Return procedure for MAX6068BEUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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