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Analog Devices Inc./Maxim Integrated MAX6043CAUT41
- Part No.:
- MAX6043CAUT41
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SOT-23-6
- Datasheet:
-
MAX6043CAUT41.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:2,172
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Product details
Overview
MAX6043CAUT41 from Maxim Integrated is a precision 4.096V voltage reference IC in SOT23-6 package, designed for high-resolution ADC/DAC biasing and industrial sensing. It delivers ±0.5% initial accuracy, 65ppm/°C max temperature coefficient, and operates from +6.1V to +40V supply across –40°C to +125°C. Its low 4.5µVP-P (0.1Hz–10Hz) noise and 200µs turn-on settling enable stable reference performance in battery-powered data acquisition systems.
For engineers reviewing the MAX6043CAUT41 datasheet, MAX6043CAUT41 pinout, MAX6043CAUT41 application, or MAX6043CAUT41 equivalent, key selection criteria include output voltage tolerance at automotive temperature extremes, load regulation under sourcing/sinking conditions up to 10mA/–0.6mA, stability with 0–100µF capacitive loads, and compatibility with high-precision 12–16-bit converter architectures requiring ≤1 LSB error over full temperature range.
Technical Context
The MAX6043CAUT41 uses bandgap-based architecture with curvature-correction circuitry and laser-trimmed thin-film resistors to achieve low drift and tight initial accuracy. Its dual-output force-sense topology (OUTF/OUTS) isolates reference generation from PCB trace resistance, enabling accurate remote sensing in noisy environments.
This variant belongs to the MAX6043 family's "C-grade" performance tier, optimized for cost-sensitive industrial applications where ±0.5% initial accuracy and 65ppm/°C tempco meet system-level calibration requirements without demanding A- or B-grade specifications. It draws 320–650µA quiescent current and supports wide input voltage headroom for unregulated supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; min/max = 4.0755V / 4.1165V at +25°C - defines absolute scaling accuracy for 12-bit (4096-step) DAC/ADC full-scale calibration. |
| Initial Accuracy | ±0.5% (max) - corresponds to ±20.5mV error at 4.096V, sufficient for 11-bit resolution without trimming. |
| Tempco | 65ppm/°C (max) - contributes ≤±0.825% error over –40°C to +125°C span, critical for thermal stability in automotive sensor modules. |
| Supply Range | +6.1V to +40V - enables direct connection to 12V/24V industrial buses without pre-regulation. |
| Noise (0.1–10Hz) | 6.6µVP-P (typ) - limits RMS quantization uncertainty to <0.0016 LSB in 16-bit systems referenced to 4.096V. |
| Load Current | Sources 10mA / sinks 0.6mA - supports driving multiple op-amp inputs or SAR ADC reference inputs without external buffers. |
| Quiescent Current | 320µA (typ) at +25°C - enables >1-year operation on 200mAh coin cell in low-duty-cycle IoT sensor nodes. |
Pinout & Package
MAX6043CAUT41 is housed in a RoHS-compliant 6-pin SOT23 package (outline U6FH-6), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads suitable for reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | I.C. (Internally Connected) | No external connection required; internal bond wires only - must remain floating to avoid parasitic coupling or ESD path disruption. |
| 2 | GND | Analog ground reference plane; requires low-impedance connection to system AGND to minimize PSRR degradation. |
| 4 | IN | Positive supply input; accepts 6.1–40V; decoupling with 0.1µF ceramic capacitor near pin improves line-transient rejection. |
| 5 | OUTF | Force output - drives reference voltage to load; connects directly to OUTS via shortest possible trace to maintain Kelvin sensing integrity. |
| 6 | OUTS | Sense input - provides feedback to internal amplifier; must tie to OUTF locally to eliminate IR drop errors in PCB traces. |
Key Features
| Feature | Design Value |
|---|---|
| Force-sense output topology | Eliminates voltage drop errors from PCB trace resistance, enabling accurate remote reference delivery to ADCs located >5cm from IC. |
| No external output capacitor required | Stable with 0–100µF capacitive loads - removes BOM cost and board space for bypass caps while maintaining phase margin >45°. |
| Short-circuit protection | Limits output current to 60mA during fault - prevents thermal runaway and enables safe operation in test jigs with accidental probe shorts. |
| Wide operating temperature range | –40°C to +125°C ambient - qualified for under-hood automotive and industrial control cabinet deployments without derating. |
| Low power consumption | 320µA typical supply current - reduces self-heating to <0.5°C rise at +125°C, minimizing tempco-induced drift contribution. |
Applications
| Industrial Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: 16-bit isolated analog input module measuring thermocouple or strain gauge outputs in PLC backplanes. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for sigma-delta ADC, enabling true 16-bit effective resolution with <1 LSB INL over temperature. Use Value: Force-sense architecture compensates for 50mΩ trace resistance between reference IC and ADC, eliminating 0.25mV offset error at 10mA load. |
Use Scenario: Tire pressure monitoring system (TPMS) ECU measuring piezoresistive pressure sensor bridge output. IC Role / Device Role / Timing Role: Supplies excitation reference for ratiometric bridge measurement, rejecting supply rail variations during cold-crank events. Use Value: 40V max input withstands load-dump transients; 65ppm/°C tempco ensures <±0.1% full-scale error across –40°C to +105°C vehicle cabin range. |
| Portable Medical Instrumentation | High-Voltage Power Supply Monitoring |
|
Use Scenario: Battery-powered ECG front-end digitizing biopotential signals with 12-bit SAR ADC. IC Role / Device Role / Timing Role: Generates precise 4.096V reference for ADC, synchronized with low-power microcontroller wake-up cycles. Use Value: 320µA quiescent current extends 200mAh Li-ion battery life to >18 months in standby mode with 10-second sampling intervals. |
Use Scenario: Telecom rectifier monitoring 48V DC bus voltage using resistive divider + 12-bit ADC. IC Role / Device Role / Timing Role: References ADC measuring scaled-down bus voltage; rejects ripple from switching regulators feeding the 48V rail. Use Value: 70dB PSRR at 1kHz suppresses 100mVP-P 100kHz switching noise to <0.3mVP-P at ADC input, preventing code flicker. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6043BAUT41#TG16 | 0.1% initial accuracy (vs. 0.5%), 20ppm/°C tempco (vs. 65ppm/°C) | Required for 14-bit+ systems needing tighter long-term stability; higher cost premium | Select when system calibration budget allows tighter initial tolerance and lower drift over temperature. |
| REF5040AIDR | 0.05% initial accuracy, 3ppm/°C tempco, SOIC-8 package, 1.2mA IQ | Higher precision but larger footprint and 4× higher supply current; not automotive qualified | Choose for lab-grade instrumentation where ultra-low drift outweighs size and power constraints. |
Compared with MAX6043BAUT41#TG16 and REF5040AIDR, MAX6043CAUT41 offers optimal balance of SOT23 size, automotive temperature rating, and cost for industrial 12-bit data acquisition-trading precision for board area and power savings without sacrificing ruggedness.
Availability
MAX6043CAUT41 is available at Aetrix Electronics and suitable for industrial data acquisition, automotive sensor modules, and portable medical instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6043CAUT41 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 industrial, automotive, and communications markets, emphasizing high reliability and parametric performance.
The MAX6043 product line delivers high-voltage, low-drift references for data converter biasing in harsh environments, targeting applications where supply rail variation, thermal stress, and board space constrain traditional solutions.
FAQ
What is the exact output voltage tolerance of MAX6043CAUT41 at room temperature?
The MAX6043CAUT41 guarantees an output voltage of 4.096V ±0.5% at +25°C, corresponding to a min/max range of 4.0755V to 4.1165V. This specification is measured with zero load current and is laser-trimmed during production. The MAX6043CAUT41 maintains this tolerance across its full –40°C to +125°C operating range, with additional drift governed by its 65ppm/°C maximum temperature coefficient.
Does MAX6043CAUT41 require an output bypass capacitor for stability?
No, the MAX6043CAUT41 does not require an external output capacitor for stability. It is internally compensated and remains stable with capacitive loads ranging from 0µF to 100µF. This eliminates board space and BOM cost associated with output bypassing while preserving transient response - a key advantage in space-constrained applications like wearable medical sensors or modular I/O cards where the MAX6043CAUT41 is commonly deployed.
How does the force-sense (OUTF/OUTS) configuration improve accuracy in MAX6043CAUT41?
The MAX6043CAUT41 uses separate force (OUTF) and sense (OUTS) pins to implement a Kelvin connection, allowing the internal amplifier to regulate voltage precisely at the sense node regardless of IR drop in PCB traces. When OUTF and OUTS are tied together near the load, the MAX6043CAUT41 compensates for voltage loss across up to 100mΩ of trace resistance - critical for maintaining sub-LSB accuracy in distributed systems like motor drive current sensing where the ADC may be physically distant from the MAX6043CAUT41.
What is the maximum capacitive load the MAX6043CAUT41 can drive without oscillation?
The MAX6043CAUT41 is specified to remain stable with capacitive loads from 0µF up to 100µF. This wide range accommodates bulk decoupling capacitors used in noisy industrial environments and large ceramic or tantalum caps needed for transient suppression in battery-backed systems. Stability is maintained across the full –40°C to +125°C temperature range and under all load conditions (0–10mA sourcing, –0.6mA sinking), making the MAX6043CAUT41 robust for high-reliability applications without requiring external compensation networks.
Can MAX6043CAUT41 operate from a 5V supply rail?
No, the MAX6043CAUT41 requires a minimum input voltage of +6.1V to regulate its 4.096V output, as specified in the Electrical Characteristics table for VOUT = +4.096V. Attempting to operate below this threshold results in dropout and unregulated output. For 5V systems, designers must use a boost converter or select a lower-voltage reference such as the MAX6029 (2.5V) or MAX6030 (3.0V); the MAX6043CAUT41 is specifically intended for higher-supply applications like 12V/24V industrial buses or 48V telecom infrastructure where its wide 6.1–40V input range provides margin against transients.
MAX6043CAUT41 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 65ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6.6µVp-p
- Noise - 10Hz to 10kHz:
- 12µVrms
- Voltage - Input:
- 6.1V ~ 40V
- Current - Supply:
- 650µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6043CAUT41 FAQ
1.How can I place an order for MAX6043CAUT41 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6043CAUT41 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 MAX6043CAUT41 reliable?
The price and inventory of MAX6043CAUT41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6043CAUT41 is usually 5 days.
3.What payment methods are accepted for MAX6043CAUT41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6043CAUT41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6043CAUT41?
MAX6043CAUT41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6043CAUT41 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 MAX6043CAUT41?
For technical support, including MAX6043CAUT41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6043CAUT41 requirements.
6.How does Aetrix verify that MAX6043CAUT41 is sourced from the original manufacturer or authorized distributors?
All MAX6043CAUT41 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 MAX6043CAUT41 meets industry standards.
7.What is the process for return or replacement of MAX6043CAUT41?
All MAX6043CAUT41 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6043CAUT41, 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 MAX6043CAUT41 part is unused and in its original packaging.
Return procedure for MAX6043CAUT41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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