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Analog Devices Inc./Maxim Integrated MAX6068BEUR-T
- Part No.:
- MAX6068BEUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6068BEUR-T.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6068BEUR-T 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 down to 2.5V input-making it ideal for battery-powered 1.8V analog signal chains in portable instrumentation and low-voltage ADC biasing.
For engineers reviewing the MAX6068BEUR-T datasheet, MAX6068BEUR-T pinout, MAX6068BEUR-T application, or MAX6068BEUR-T equivalent, key selection criteria include its ultra-low quiescent current, dropout voltage ≤200mV at 1mA, absence of required output capacitor, stable operation with capacitive loads, and SOT23-3 footprint compatibility across the MAX6061–MAX6068 family.
Technical Context
This three-terminal series-mode voltage reference uses proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve high initial accuracy and low thermal drift. Its internal compensation eliminates need for external stabilization capacitors, reducing board area and component count.
The device features supply-current independence (≤8.0µA/V variation), low-output-impedance drive capability, and robust transient response-enabling direct interface with SAR and delta-sigma ADCs, precision DACs, and low-power microcontroller analog peripherals without additional buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±0.39% (1.793V to 1.807V at +25°C); enables accurate 1.8V system rail referencing and ADC VREF scaling. |
| Temp Coefficient | ≤20ppm/°C (max); ensures <±1.2mV drift over full –40°C to +85°C range for stable metrology-grade performance. |
| Quiescent Current | 90µA (typ), ≤125µA (max); supports multi-year battery life in always-on sensor nodes and portable DMMs. |
| Dropout Voltage | ≤200mV at 1mA load; allows operation from single-cell Li-ion (3.0V min) or two-cell alkaline (2.5V min) supplies. |
| Load Drive | Sources 5mA / sinks 2mA; directly drives ADC reference inputs, op-amp bias networks, and small logic rails. |
| Noise (0.1–10Hz) | 22µVP-P; low enough for 16-bit+ precision data acquisition without added filtering. |
| Line Regulation | ≤200µV/V; maintains output stability despite supply ripple or battery sag in mobile systems. |
Pinout & Package
MAX6068BEUR-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 0.8mm footprint and 0.95mm height-optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Voltage Supply | Accepts 2.5V to 12.6V; requires no series resistor-unlike shunt references-and supports direct connection to regulated or battery-derived rails. |
| 2 (OUT) | Precision Reference Output | Delivers stable 1.80V; internally compensated-no external capacitor needed for stability-even with 1µF capacitive loads. |
| 3 (GND) | Analog Ground Reference | Must be connected to clean, low-impedance system ground; separates reference return path from digital or power ground noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 90µA typical-reduces standby power by >90% vs. legacy bandgap references, extending coin-cell life beyond 5 years. |
| No output capacitor required | Internally compensated design eliminates mandatory 1–10µF ceramic capacitor, saving ≥1.0mm² PCB area per reference. |
| Stable with capacitive loads | Operates reliably with 0–1µF output capacitance-enabling direct decoupling of ADC reference pins without oscillation risk. |
| Low dropout voltage | 200mV max at 1mA-supports operation from depleted batteries or low-headroom LDO outputs in compact wearables. |
| High output current drive | 5mA sourcing capability eliminates need for external buffer op-amps when driving multiple ADCs or precision comparators. |
Applications
| Portable Battery-Powered Systems | Notebook Computers |
|---|---|
Use Scenario: Powering 1.8V analog front-end in handheld multimeters and gas sensors operating on two AA cells. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit sigma-delta ADC and low-noise instrumentation amplifier biasing. Use Value: Enables 100k+ readings on single battery set via 90µA quiescent draw and 200mV dropout-no brownout during measurement bursts. |
Use Scenario: Providing stable 1.8V reference for DDR3L memory VREF and touchpad controller ADCs. IC Role / Device Role / Timing Role: Precision DC reference for memory interface calibration and capacitive sensing subsystems. Use Value: Maintains ±0.39% accuracy across thermal cycling (–10°C to +70°C chassis temp), ensuring consistent touch sensitivity and memory timing margin. |
| PDAs, GPSs, DMMs | Cellular Phones |
Use Scenario: Biasing GPS RF front-end LNAs and high-resolution barometric pressure sensor ADCs in compact PDAs. IC Role / Device Role / Timing Role: Low-noise 1.8V reference source for mixed-signal SoC analog blocks and MEMS sensor interfaces. Use Value: 22µVP-P (0.1–10Hz) noise and 20ppm/°C drift preserve GPS position accuracy and altimeter resolution under varying ambient conditions. |
Use Scenario: Supplying reference voltage to audio codec ADC/DAC and battery fuel-gauge IC in LTE smartphones. IC Role / Device Role / Timing Role: Dual-role reference for audio signal chain integrity and battery voltage monitoring precision. Use Value: 5mA sourcing capability supports simultaneous audio and fuel-gauge conversion without voltage droop-critical for call quality and battery runtime estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3418ARJZ-R7 | 1.8V output, ±0.1% initial accuracy, 30ppm/°C TC, 125µA IQ, SOT23-3 | Higher accuracy but higher quiescent current and worse TC; requires 1µF output cap for stability | Select when tighter initial tolerance is critical and board space allows extra capacitor; avoid in ultra-low-power designs. |
| REF3018AIDBZR | 1.8V output, ±0.2% initial accuracy, 50ppm/°C TC, 45µA IQ, SOT23-3 | Lower quiescent current but significantly higher TC and lower output drive (25mA max sink only) | Select for longest battery life where thermal drift is mitigated by software calibration; not suitable for wide-temp industrial use. |
Compared with ADR3418ARJZ-R7 and REF3018AIDBZR, the MAX6068BEUR-T uniquely balances ±0.39% accuracy, 20ppm/°C TC, 90µA IQ, and 5mA sourcing-making it optimal for uncalibrated, wide-temperature, battery-operated 1.8V reference applications requiring minimal BOM count.
Availability
MAX6068BEUR-T is available at Aetrix Electronics and suitable for portable battery-powered systems, notebook computers, PDAs/GPS devices, and cellular phone analog subsystems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6068BEUR-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and consumer applications.
The MAX6061–MAX6068 family was designed specifically for space- and power-constrained systems needing precision voltage references without external compensation-targeting portable instrumentation, medical sensors, and energy-harvesting edge nodes.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6068BEUR-T?
The MAX6068BEUR-T has an output voltage of 1.800V with ±0.39% initial accuracy (1.793V to 1.807V at +25°C) and a maximum temperature coefficient of 20ppm/°C over –40°C to +85°C. These specs are verified per Maxim's production test flow and apply across the full extended temperature range-not just at room temperature-ensuring reliable performance in outdoor and automotive-adjacent environments.
Does the MAX6068BEUR-T require an external output capacitor for stability?
No, the MAX6068BEUR-T does not require an external output capacitor for stability due to internal compensation. It remains stable with 0–1µF capacitive loads, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates a common BOM item and saves PCB area-confirmed in Maxim's Typical Operating Circuit and stability characterization data.
What is the minimum input voltage required for the MAX6068BEUR-T to regulate properly?
The MAX6068BEUR-T requires a minimum input voltage of 2.5V to maintain regulation. Its dropout voltage is specified at ≤200mV at 1mA load, meaning it can deliver a stable 1.80V output even when VIN drops to 2.0V under light load-but guaranteed operation begins at VIN ≥2.5V per the Absolute Maximum Ratings and Electrical Characteristics tables.
Can the MAX6068BEUR-T both source and sink current, and how much?
Yes, the MAX6068BEUR-T can source up to 5mA into a load and sink up to 2mA from a load. This bidirectional capability allows it to actively drive reference inputs, bias op-amp stages, or absorb leakage currents-unlike many shunt references limited to sinking only. The 5mA sourcing spec is validated across temperature and line conditions in the MAX6068 Electrical Characteristics table.
Is the MAX6068BEUR-T compatible with other members of the MAX6061–MAX6068 family in terms of pinout and PCB layout?
Yes, all MAX6061–MAX6068 variants-including MAX6068BEUR-T-share identical 3-pin SOT23-3 pinout (IN, OUT, GND) and mechanical footprint. They are PCB-layout compatible across output voltages (1.25V to 5.0V), enabling single-board designs with voltage option flexibility and simplified inventory management without layout revision.
MAX6068BEUR-T 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-T FAQ
1.How can I place an order for MAX6068BEUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6068BEUR-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 MAX6068BEUR-T reliable?
The price and inventory of MAX6068BEUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6068BEUR-T is usually 5 days.
3.What payment methods are accepted for MAX6068BEUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6068BEUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6068BEUR-T?
MAX6068BEUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6068BEUR-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 MAX6068BEUR-T?
For technical support, including MAX6068BEUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6068BEUR-T requirements.
6.How does Aetrix verify that MAX6068BEUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6068BEUR-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 MAX6068BEUR-T meets industry standards.
7.What is the process for return or replacement of MAX6068BEUR-T?
All MAX6068BEUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6068BEUR-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 MAX6068BEUR-T part is unused and in its original packaging.
Return procedure for MAX6068BEUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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