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Analog Devices Inc./Maxim Integrated MAX6045AEUR
- Part No.:
- MAX6045AEUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6045AEUR.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
The MAX6045AEUR from Maxim Integrated is a precision, low-dropout, micropower series-mode voltage reference in SOT23-3 packaging, delivering 4.500V ±0.9mV (0.2% initial accuracy) with <15ppm/°C temperature coefficient and 100mV dropout at 500µA load current. It operates from (VOUT + 0.2V) to 12.6V supply, draws ≤35µA quiescent current, and supports ±500µA sourcing/sinking-ideal for high-accuracy ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the MAX6045AEUR datasheet, MAX6045AEUR pinout, MAX6045AEUR application, or MAX6045AEUR equivalent, key selection criteria include output voltage stability over temperature, ultra-low supply current independence from VIN, dropout performance under load, and compatibility with 0–2.2nF capacitive loads without external compensation.
Technical Context
This device uses a proprietary curvature-correction circuit and laser-trimmed thin-film resistors to achieve <15ppm/°C tempco and 0.2% initial accuracy across –40°C to +85°C. Its series-mode architecture eliminates need for external bias resistors or compensation capacitors, unlike shunt references.
It delivers stable 4.500V output with 0.16µV/µA load regulation and 25µV/V line regulation, while maintaining ripple rejection of 76dB (10Hz–10kHz) and noise of 215µVRMS (0.1Hz–10Hz). Turn-on settling time is 180µs to 0.1% of final value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.500V ±0.9mV (0.2% initial accuracy at +25°C) |
| Tempco | <15ppm/°C (max, –40°C to +85°C, box method) |
| Quiescent Current | ≤35µA (supply-current variation only 0.8µA/V across VIN) |
| Dropout Voltage | 100mV (at 500µA load; enables operation down to 4.6V input) |
| Load Regulation | 0.16µV/µA (±500µA sourcing/sinking capability) |
| Capacitive Load Stability | Stable with 0–2.2nF (no external capacitor required) |
| Noise (0.1Hz–10Hz) | 215µVRMS (supports high-resolution 16-bit+ data acquisition) |
Pinout & Package
MAX6045AEUR is housed in a 3-pin SOT23-3 surface-mount package with gull-wing leads, footprint compatible with JEDEC MO-178AA. Thermal resistance θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Voltage Input | Accepts (VOUT + 0.2V) to 12.6V; supplies internal bandgap core and output stage |
| 2 (OUT) | Reference Voltage Output | Provides regulated 4.500V; capable of sourcing or sinking ±500µA |
| 3 (GND) | Ground Reference | Analog ground return; must be low-impedance path to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables 0.2% initial accuracy and <15ppm/°C tempco without post-package trimming |
| Proprietary curvature-correction circuit | Compensates second-order thermal drift, extending accuracy over full –40°C to +85°C range |
| No external compensation required | Internally compensated for 0–2.2nF load capacitance-reduces BOM count and PCB area |
| Supply-current independence | Quiescent current varies only 0.8µA/V with VIN-enables stable power budgeting across wide input range |
| Low dropout (100mV @ 500µA) | Permits use in 4.6V-input systems (e.g., single Li-ion + LDO), preserving headroom for analog front-ends |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Provides stable 4.500V reference for ADC VREF and DAC output scaling. Use Value: 0.2% initial accuracy and <15ppm/°C tempco ensure <0.005% full-scale error over field temperature range, eliminating recalibration. | Use Scenario: 4–20mA loop-powered pressure transmitters operating from 12–36V supply with onboard signal conditioning. IC Role / Device Role / Timing Role: Supplies precision reference for bridge sensor excitation and analog signal chain gain-setting resistors. Use Value: 100mV dropout allows direct regulation from local 4.7V LDO, minimizing heat dissipation in sealed enclosures. |
| Medical Point-of-Care Devices | Test & Measurement Equipment |
Use Scenario: Handheld blood glucose meters requiring accurate analog front-end biasing under varying battery voltage (3.0–4.2V). IC Role / Device Role / Timing Role: Generates stable 4.500V reference for op-amp biasing and ADC reference in low-power sleep/wake cycles. Use Value: 35µA max quiescent current extends battery life; 0–2.2nF load stability avoids adding capacitor in space-constrained PCB layout. | Use Scenario: Benchtop multimeters using dual-slope integration with 22-bit resolution. IC Role / Device Role / Timing Role: Supplies ultra-stable 4.500V reference for integrator capacitor charging and zero-reference calibration. Use Value: 215µVRMS (0.1Hz–10Hz) noise and 130ppm hysteresis ensure repeatable sub-ppm measurement accuracy across thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3445ARMZ | 4.500V output, 12ppm/°C max tempco, 45µA max quiescent current, requires 1µF output capacitor for stability | Higher supply current; capacitor requirement increases board area and cost | Select MAX6045AEUR when minimizing quiescent current and eliminating external capacitors is critical |
| REF3345AIDBVR | 4.500V output, 10ppm/°C max tempco, 6.5µA typical quiescent current, but 200mV dropout at 500µA and limited to 25mA max load | Lower IQ but higher dropout and lower sink/source capability limits use in active bias networks | Select MAX6045AEUR when ±500µA sourcing/sinking and 100mV dropout are required for driving precision op-amps or DACs |
Compared with ADR3445ARMZ and REF3345AIDBVR, MAX6045AEUR uniquely balances ultra-low quiescent current (≤35µA), minimal dropout (100mV), full ±500µA drive strength, and capacitor-free stability-making it optimal for space- and power-constrained precision analog systems where reference loading and thermal drift must both be tightly controlled.
Availability
MAX6045AEUR is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, handheld test equipment, and battery-powered data acquisition systems requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6045AEUR 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 MAX6012 family-including MAX6045AEUR-is engineered for high-accuracy, low-power voltage referencing in space-constrained, battery-operated systems where stability, efficiency, and minimal external components are essential.
FAQ
What is the output voltage tolerance of the MAX6045AEUR over temperature?
The MAX6045AEUR guarantees 4.500V ±0.9mV (0.2%) initial accuracy at +25°C. Over the full –40°C to +85°C operating range, total error remains within ±0.0675% (±3.04mV) due to its <15ppm/°C temperature coefficient and 130ppm hysteresis-verified by the "box method" per datasheet Note 2. This performance is confirmed in the MAX6045A grade electrical characteristics table on page 7.
Does the MAX6045AEUR require an external output capacitor?
No, the MAX6045AEUR is internally compensated and stable with capacitive loads from 0 to 2.2nF-no external capacitor is required. This eliminates BOM cost and PCB area, especially valuable in space-critical applications like wearables or handheld instruments. An optional capacitor may improve transient response to step-load changes, but it is never mandatory for stability.
What is the minimum input voltage needed for the MAX6045AEUR to regulate properly?
The MAX6045AEUR requires a minimum input voltage of VOUT + 0.2V = 4.7V to maintain regulation at full 500µA load. Its 100mV dropout voltage (specified at 500µA) means it can sustain 4.500V output with only 4.6V input under light loads. The absolute maximum input is 12.6V, and operation below 4.7V may cause output droop or turn-off transients.
How does the supply current of the MAX6045AEUR vary with input voltage?
The MAX6045AEUR exhibits exceptional supply-current stability: quiescent current varies only 0.8µA per volt of input voltage change (IIN/VIN = 0.8µA/V), remaining ≤35µA across its full input range. This near-independence from VIN simplifies power budgeting in systems with fluctuating rails-unlike shunt references whose current scales linearly with supply voltage.
Can the MAX6045AEUR source and sink current simultaneously?
No-the MAX6045AEUR operates in series-mode and can either source up to +500µA (to a lighter load) or sink up to –500µA (from a heavier load), but not both simultaneously. Its output stage is a single-ended buffer; bidirectional current flow occurs sequentially depending on load demand relative to reference node, enabling flexible biasing of op-amps, ADCs, and DACs without external transistors.
MAX6045AEUR 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):
- 4.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500 µA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 110µVp-p
- Noise - 10Hz to 10kHz:
- 215µVrms
- Voltage - Input:
- 4.7V ~ 12.6V
- Current - Supply:
- 35µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6045AEUR FAQ
1.How can I place an order for MAX6045AEUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6045AEUR 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 MAX6045AEUR reliable?
The price and inventory of MAX6045AEUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6045AEUR is usually 5 days.
3.What payment methods are accepted for MAX6045AEUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6045AEUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6045AEUR?
MAX6045AEUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6045AEUR 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 MAX6045AEUR?
For technical support, including MAX6045AEUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6045AEUR requirements.
6.How does Aetrix verify that MAX6045AEUR is sourced from the original manufacturer or authorized distributors?
All MAX6045AEUR 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 MAX6045AEUR meets industry standards.
7.What is the process for return or replacement of MAX6045AEUR?
All MAX6045AEUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6045AEUR, 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 MAX6045AEUR part is unused and in its original packaging.
Return procedure for MAX6045AEUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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