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Analog Devices Inc./Maxim Integrated MAX6143BASA41
- Part No.:
- MAX6143BASA41
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6143BASA41.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6143BASA41 from Maxim Integrated is a high-precision, low-noise voltage reference with integrated temperature sensor output, delivering a factory-trimmed +4.096V reference (±0.10% initial accuracy), 10ppm/°C max temperature coefficient over –40°C to +125°C, and 7µVP-P (0.1Hz–10Hz) noise - ideal for 16-bit ADC/DAC systems requiring stable excitation in automotive and industrial data acquisition.
For engineers reviewing the MAX6143BASA41 datasheet, MAX6143BASA41 pinout, MAX6143BASA41 application, or MAX6143BASA41 equivalent, key selection criteria include its 4.096V output compatibility with 12-/16-bit SAR ADCs, TRIM input for ±6% fine adjustment, TEMP output (630mV @ 25°C, 2.1mV/°C), and shutdown current of 0.01µA - all in an 8-pin SO package rated for automotive temperature range.
Technical Context
The MAX6143BASA41 employs bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve low drift and high initial accuracy. Its TEMP terminal provides a linear analog voltage proportional to die temperature (2.1mV/°C), enabling on-chip thermal monitoring without external sensors.
It features active-low SHDN control, TRIM input for resistive-divider-based output calibration, and operates from (VOUT + 2V) up to +40V input while sourcing up to 30mA - supporting both precision regulation and sensing roles in single-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +4.096V (nominal), ±0.10% initial accuracy at +25°C - ensures direct match to 12-bit/16-bit ADC full-scale ranges without scaling. |
| Tempco | 10ppm/°C max (–40°C to +125°C) - limits reference drift to ≤0.5 LSB error over full automotive temperature range in 16-bit systems. |
| Noise (0.1Hz–10Hz) | 7µVP-P - contributes <0.0017 LSB RMS noise in 4.096V-referenced 16-bit ADC (LSB = 62.5µV). |
| Supply Current | 650µA max (–40°C to +125°C) - enables low-power operation in battery-backed instrumentation. |
| Shutdown Current | 0.01µA - reduces system standby power by >99% vs. active mode, critical for always-on monitoring nodes. |
| TEMP Output | 630mV @ +25°C, 2.1mV/°C slope - provides calibrated die temperature measurement with ±1.5°C typical accuracy after system calibration. |
| Load Drive | Sources 30mA / sinks 2mA - supports direct driving of ADC reference inputs, op-amp buffers, or small logic loads without external amplification. |
Pinout & Package
MAX6143BASA41 is housed in an 8-pin SO (Small Outline Integrated Circuit) package per JEDEC MS-012, 150-mil body width, with pins 1 and 8 internally connected and not to be externally wired.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | I.C. (Internally Connected) | Not bonded; must remain unconnected - floating or tied to GND/IN causes undefined behavior or damage. |
| 2 | IN | Positive supply input (6.1V to +40V); dropout voltage ≤1.5V at 30mA load ensures operation from 7.6V rails. |
| 3 | TEMP | Analog temperature transducer output; requires high-impedance buffer (≥1MΩ) to avoid loading-induced error. |
| 4 | GND | Analog ground reference; must be star-connected to minimize noise coupling into reference path. |
| 5 | TRIM | Voltage divider tap point; adjusts output ±6% via external potentiometer - enables field calibration without trimming resistors. |
| 6 | OUT | Stable +4.096V reference output; stable with 0–100µF capacitive loads - eliminates mandatory bypass capacitor, saving PCB area. |
| 7 | SHDN | Active-low enable; <0.8V asserts shutdown (IIN = 0.01µA), ≥2.0V enables normal operation - compatible with 3.3V/5V logic. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Linear 2.1mV/°C TEMP output enables dual-function use as reference + on-die thermal monitor - reduces BOM count in space-constrained modules. |
| No-output-capacitor stability | Guaranteed stable with 0–100µF capacitive loads - eliminates mandatory 10µF output capacitor, simplifying layout and improving reliability in high-vibration environments. |
| Trim-adjustable output | ±6% output adjustment via external resistive divider on TRIM pin - allows end-system calibration to compensate for PCB trace resistance and ADC gain error. |
| Wide input voltage range | (VOUT + 2V) to +40V operation - supports direct connection to unregulated 12V/24V automotive rails without pre-regulation. |
| Automotive-grade temperature range | –40°C to +125°C operation with guaranteed specs - qualified for under-hood and engine-control applications per AEC-Q100 stress requirements. |
Applications
| High-Resolution Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: 16-bit isolated analog input module for industrial PLCs measuring thermocouple, RTD, and strain gauge signals. IC Role / Device Role / Timing Role: Primary voltage reference for successive-approximation ADC and excitation source for ratiometric bridge sensors. Use Value: 4.096V output matches 16-bit full-scale (65536 × 62.5µV), while 10ppm/°C tempco holds total INL error <±0.5 LSB across –40°C to +85°C ambient. | Use Scenario: Engine control unit (ECU) monitoring coolant temperature, intake air temperature, and oil pressure via analog sensor interfaces. IC Role / Device Role / Timing Role: Dual-role device: provides stable 4.096V ADC reference and supplies calibrated die temperature data via TEMP pin for thermal derating algorithms. Use Value: Eliminates need for separate temperature sensor IC; TEMP output drift tracked against reference enables self-compensated thermal readings within ±2°C system accuracy. |
| Portable Precision Instrumentation | Battery-Powered Environmental Monitoring |
Use Scenario: Handheld digital multimeter (DMM) with autoranging 5½-digit ADC and auto-zero function. IC Role / Device Role / Timing Role: Low-noise reference for integrating ADC core and zero-reference for auto-zero amplifier during null cycles. Use Value: 7µVP-P noise ensures ≤0.002% reading uncertainty; 0.01µA shutdown current extends 9V battery life to >1 year in sleep mode. | Use Scenario: Wireless soil moisture and ambient temperature node powered by Li-SOCl₂ battery with 10-year target lifetime. IC Role / Device Role / Timing Role: Reference for low-power SAR ADC sampling environmental sensors; TEMP pin monitors internal MCU junction temperature for thermal throttling. Use Value: 650µA quiescent current + 0.01µA shutdown enables µA-level system sleep; 4.096V output maximizes dynamic range of 12-bit ADC used for battery voltage telemetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040IDR | 4.096V output, 3ppm/°C max tempco, 0.05% initial accuracy, but no TEMP output or TRIM pin - requires external temperature sensor for thermal monitoring. | Higher accuracy and lower drift, but lacks integrated temperature sensing - unsuitable where die temperature correlation is required. | Select REF5040IDR only when absolute reference stability dominates over multi-function integration and board space is unconstrained. |
| ADR444BRZ | 4.096V output, 3ppm/°C max tempco, 0.04% initial accuracy, includes trim pin but no TEMP output - higher noise (12µVP-P) than MAX6143BASA41. | Better long-term stability and lower drift, but no on-chip temperature transducer - adds cost and complexity for thermal-aware designs. | Choose ADR444BRZ for metrology-grade applications demanding sub-ppm stability, accepting added component count for thermal sensing. |
Compared with REF5040IDR and ADR444BRZ, MAX6143BASA41 trades minor accuracy (0.10% vs. ≤0.05%) and higher tempco (10ppm/°C vs. 3ppm/°C) for unique dual functionality: integrated temperature sensing and trim capability - reducing total solution size and cost in automotive and portable systems where thermal awareness and field calibration are essential.
Availability
MAX6143BASA41 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial data loggers, and portable test equipment requiring stable component supply with guaranteed automotive temperature range performance and long-term availability.
Supply support for MAX6143BASA41 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, automotive, and communications applications.
The MAX6143 product line delivers high-accuracy, low-drift voltage references with integrated temperature sensing - engineered specifically for data acquisition systems needing simultaneous reference stability and on-die thermal monitoring in harsh environments.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6143BASA41?
The MAX6143BASA41 has a nominal output voltage of +4.096V with ±0.10% initial accuracy at +25°C and a maximum temperature coefficient of 10ppm/°C over the full –40°C to +125°C operating range. These specifications are guaranteed per the datasheet's electrical characteristics table for MAX6143B_41 variant, confirming its suitability for 12-bit and 16-bit converter applications where reference drift must remain below 1 LSB.
Does the MAX6143BASA41 require an output bypass capacitor for stability?
No, the MAX6143BASA41 does not require an output bypass capacitor for stability. It is explicitly characterized as stable with capacitive loads from 0 to 100µF. This eliminates the need for a mandatory output capacitor, reducing component count and PCB area - a key advantage in space-constrained applications like automotive ECUs and handheld instruments where the MAX6143BASA41 is commonly deployed.
How is the TEMP output of the MAX6143BASA41 used, and what is its accuracy?
The TEMP pin of the MAX6143BASA41 outputs a voltage proportional to die temperature: 630mV at +25°C with a slope of 2.1mV/°C. Accuracy depends on system-level calibration; uncalibrated, it typically achieves ±3°C over –40°C to +125°C. When referenced to the stable 4.096V output and measured with a high-resolution ADC, the MAX6143BASA41 enables on-die thermal monitoring without external sensors - a feature not found in most standalone voltage references.
Can the output voltage of the MAX6143BASA41 be adjusted, and how?
Yes, the MAX6143BASA41 output voltage can be trimmed ±6% using the TRIM pin. Connect a resistive divider (e.g., 50kΩ potentiometer) between OUT, TRIM, and GND, with the wiper to TRIM. The output change follows ∆VOUT = 2 × (VTRIM – VOUT/2) × k, where k ≈ ±6%. This allows field calibration to compensate for system-level gain errors - a capability absent in fixed-reference alternatives like REF5040IDR.
What is the shutdown current and logic threshold for the SHDN pin on the MAX6143BASA41?
The MAX6143BASA41 draws only 0.01µA (typical) in shutdown mode when the SHDN pin is held below 0.8V. Logic-high threshold is ≥2.0V for normal operation. This ultra-low shutdown current extends battery life significantly in intermittent-sampling applications - for example, reducing average current by >99% compared to active mode (650µA), making the MAX6143BASA41 ideal for energy-harvesting and long-life IoT sensor nodes.
MAX6143BASA41 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 7µVp-p
- Noise - 10Hz to 10kHz:
- 11.5µVrms
- 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:
- 8-SOIC
MAX6143BASA41 FAQ
1.How can I place an order for MAX6143BASA41 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6143BASA41 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 MAX6143BASA41 reliable?
The price and inventory of MAX6143BASA41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6143BASA41 is usually 5 days.
3.What payment methods are accepted for MAX6143BASA41?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6143BASA41 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6143BASA41?
MAX6143BASA41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6143BASA41 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 MAX6143BASA41?
For technical support, including MAX6143BASA41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6143BASA41 requirements.
6.How does Aetrix verify that MAX6143BASA41 is sourced from the original manufacturer or authorized distributors?
All MAX6143BASA41 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 MAX6143BASA41 meets industry standards.
7.What is the process for return or replacement of MAX6143BASA41?
All MAX6143BASA41 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6143BASA41, 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 MAX6143BASA41 part is unused and in its original packaging.
Return procedure for MAX6143BASA41:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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