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Analog Devices Inc./Maxim Integrated MAX6068AEUR+T
- Part No.:
- MAX6068AEUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6068AEUR+T.pdf
- Description:
- IC VREF SERIES 1.8V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,169
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Product details
Overview
MAX6068AEUR+T from Maxim Integrated is a precision, low-dropout, micropower series voltage reference delivering a stable 1.800V output with ±0.17% initial accuracy (max), 20ppm/°C temperature coefficient (max), and 90µA typical quiescent current. It operates from 2.5V to 12.6V input, sources up to 5mA or sinks 2mA, and is used in high-accuracy ADC biasing, portable battery-powered instrumentation, and low-voltage precision power rails.
For engineers reviewing the MAX6068AEUR+T datasheet, MAX6068AEUR+T pinout, MAX6068AEUR+T application, or MAX6068AEUR+T equivalent, key selection criteria include its SOT23-3 package footprint, dropout voltage ≤200mV at 1mA, no external capacitor requirement, and guaranteed performance across –40°C to +85°C.
Technical Context
The MAX6068AEUR+T is a three-terminal, series-mode voltage reference employing proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve ultra-low drift. Its internal compensation eliminates need for external stability capacitors, and supply current variation is limited to 3.3–8.0µA/V across 2.5V–12.6V input range.
It delivers 1.800V output with load regulation of 0.5–0.9mV/mA (sourcing) and 1.5–4mV/mA (sinking), noise of 22µVp-p (0.1Hz–10Hz), and 86dB ripple rejection at 120Hz - enabling use in noise-sensitive data acquisition and battery-constrained systems without performance trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800V ±0.003V (±0.17% max at +25°C) - enables direct biasing of 1.8V ADC references and low-voltage analog signal chains. |
| Temperature Coefficient | ≤20ppm/°C (max) - ensures <±0.36mV drift over –40°C to +85°C, critical for field-deployed measurement systems. |
| Quiescent Current | 90µA (typ), ≤125µA (max) - supports multi-year operation on coin-cell batteries in portable DMMs and sensor nodes. |
| Dropout Voltage | ≤200mV at 1mA load - allows operation from single Li-ion cell (3.0–4.2V) or two alkaline cells (2.4–3.2V) with margin. |
| Load Current Capability | Sources 5mA / sinks 2mA - drives SAR ADC reference inputs, op-amp bias networks, and small logic I/O rails directly. |
| Line Regulation | 33–200µV/V - maintains output stability despite battery voltage sag or unregulated supply ripple. |
| Noise (0.1Hz–10Hz) | 22µVp-p - minimizes quantization uncertainty in 16-bit+ ADC conversions without external filtering. |
Pinout & Package
MAX6068AEUR+T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), 2.92mm × 1.3mm × 1.0mm, with gull-wing leads and exposed pad not electrically connected. Pin 1 (IN) accepts 2.5V–12.6V input; Pin 2 (OUT) delivers regulated 1.800V; Pin 3 (GND) is system ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Unregulated Input Supply | Accepts 2.5V–12.6V; requires no series resistor - unlike shunt references - simplifying power tree design. |
| 2 (OUT) | Precision Reference Output | Delivers 1.800V with ±0.17% accuracy; stable into capacitive loads; no external capacitor needed for stability. |
| 3 (GND) | Analog Ground Reference | Must be connected to clean system ground plane; separates reference return from noisy digital or power grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low tempco | 20ppm/°C max - achieves <±0.36mV total drift over full industrial temperature range, eliminating calibration at extremes. |
| No output capacitor required | Internally compensated - saves PCB area and BOM cost in space-constrained handheld instruments and wearables. |
| Supply-current independence | Only 3.3–8.0µA/V variation - enables stable current draw across battery discharge curve, simplifying power budgeting. |
| Low dropout | 200mV max at 1mA - supports operation from partially discharged batteries while maintaining reference integrity. |
| High output drive | 5mA source / 2mA sink - eliminates need for external buffer op-amps when driving multiple ADC references or precision comparators. |
Applications
| Portable Digital Multimeters (DMMs) | Handheld GPS Receivers |
|---|---|
Use Scenario: Precision DC voltage measurement with 4½-digit resolution under varying ambient temperatures and battery levels. IC Role / Device Role / Timing Role: Provides stable 1.800V reference for SAR ADC and front-end gain stages. Use Value: Enables ±0.025% basic accuracy over –10°C to +50°C without recalibration, extending field service intervals. |
Use Scenario: Low-power GNSS baseband processing in compact consumer-grade receivers. IC Role / Device Role / Timing Role: Supplies accurate 1.8V bias to RF front-end LNA and ADC clock buffers. Use Value: Reduces position error drift by 30cm RMS due to reference-induced timing jitter suppression. |
| Industrial Sensor Transmitters | Medical Point-of-Care Glucose Meters |
Use Scenario: 4–20mA loop-powered temperature transmitter operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Generates excitation voltage for RTD bridge and reference for 24-bit ΣΔ ADC. Use Value: Maintains <±0.1°C measurement repeatability across full temperature range without trimming. |
Use Scenario: Battery-operated electrochemical glucose strip analyzer requiring clinical-grade accuracy. IC Role / Device Role / Timing Role: Supplies 1.8V reference to potentiostat DAC and biosensor signal chain. Use Value: Meets ISO 15197:2013 accuracy requirements (<±15mg/dL or ±15%) across shelf life and temperature. |
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, 10ppm/°C tempco, 120µA IQ, SOT23-3 | Better accuracy/tempco but higher quiescent current; requires 2.3V min input | Select for highest stability where battery life is secondary to measurement fidelity. |
| REF3018AIDBZR | 1.8V output, ±0.2% initial accuracy, 50ppm/°C tempco, 45µA IQ, SOT23-3 | Lower IQ but higher tempco; optimized for ultra-low-power sensor nodes | Select when >5-year battery life is mandatory and temperature range is limited to 0°C–70°C. |
Compared with ADR3418ARJZ-R7 and REF3018AIDBZR, the MAX6068AEUR+T offers the best balance of low dropout (200mV), moderate quiescent current (90µA), and industrial-grade tempco (20ppm/°C) in a drop-in SOT23-3 footprint - making it optimal for portable test equipment and wide-temperature embedded systems.
Availability
MAX6068AEUR+T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered medical devices, and industrial sensor transmitters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX6068AEUR+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6061–MAX6068 family was engineered specifically for space-constrained, battery-operated systems needing high-accuracy voltage references without external compensation components - targeting portable test gear, handheld sensors, and low-power data acquisition.
FAQ
What is the maximum input voltage rating for MAX6068AEUR+T?
The absolute maximum input voltage for MAX6068AEUR+T is +13.5V referenced to GND. However, the specified operating range is 2.5V to 12.6V. Exceeding 12.6V may degrade long-term stability or violate line regulation specs, and sustained operation above 13.5V risks permanent damage. Always observe the 12.6V upper limit in functional designs using MAX6068AEUR+T.
Does MAX6068AEUR+T require an external output capacitor for stability?
No, MAX6068AEUR+T is internally compensated and does not require an external output capacitor for stability - a key differentiator from many competing references. This eliminates board area and BOM cost. An optional 0.1µF ceramic capacitor may be added to improve transient response under large load steps, but it is never mandatory for stability of MAX6068AEUR+T.
What is the dropout voltage specification for MAX6068AEUR+T at full load?
The dropout voltage for MAX6068AEUR+T is specified as ≤200mV at 1mA load current. At its maximum rated sourcing current of 5mA, dropout increases slightly but remains within 250mV - verified in typical operating characteristics curves. This allows reliable operation from a 2.05V minimum input at 5mA, supporting single-cell lithium or two-cell alkaline configurations with MAX6068AEUR+T.
How does the initial accuracy of MAX6068AEUR+T compare to other grades in the MAX606x family?
MAX6068AEUR+T has ±0.17% initial accuracy (max), tighter than the 'B' grade (±0.39%) and among the tightest in the MAX6061–MAX6068 series. Only MAX6061A (±0.32%), MAX6062A (±0.24%), and MAX6066A (±0.2%) match or exceed this spec within the family. The 'A' grade designation in MAX6068AEUR+T confirms its top-tier accuracy binning for MAX6068AEUR+T.
Can MAX6068AEUR+T sink current, and what is the maximum sink capability?
Yes, MAX6068AEUR+T can actively sink up to 2mA of load current - essential for driving reference inputs of certain precision comparators or op-amps configured as active pull-downs. Sink capability is fully characterized from –2mA to 0mA, with load regulation of 1.5–4mV/mA. This bidirectional drive (5mA source / 2mA sink) distinguishes MAX6068AEUR+T from many unidirectional references and expands its system integration flexibility.
MAX6068AEUR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.17%
- Temperature Coefficient:
- 20ppm/°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
MAX6068AEUR+T FAQ
1.How can I place an order for MAX6068AEUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6068AEUR+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 MAX6068AEUR+T reliable?
The price and inventory of MAX6068AEUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6068AEUR+T is usually 5 days.
3.What payment methods are accepted for MAX6068AEUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6068AEUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6068AEUR+T?
MAX6068AEUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6068AEUR+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 MAX6068AEUR+T?
For technical support, including MAX6068AEUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6068AEUR+T requirements.
6.How does Aetrix verify that MAX6068AEUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6068AEUR+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 MAX6068AEUR+T meets industry standards.
7.What is the process for return or replacement of MAX6068AEUR+T?
All MAX6068AEUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6068AEUR+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 MAX6068AEUR+T part is unused and in its original packaging.
Return procedure for MAX6068AEUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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