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Analog Devices Inc./Maxim Integrated MAX6143AASA41+
- Part No.:
- MAX6143AASA41+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6143AASA41+.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,023
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Product details
Overview
MAX6143AASA41+ from Maxim Integrated is a high-precision, low-noise voltage reference with integrated temperature sensor output. It delivers a factory-trimmed 4.096V output with ±0.06% initial accuracy, 3ppm/°C max temperature coefficient over –40°C to +125°C, and 7µVP-P (0.1Hz–10Hz) noise - optimized for 16-bit ADC/DAC systems requiring stable, low-drift references in automotive and industrial instrumentation.
For engineers reviewing the MAX6143AASA41+ datasheet, MAX6143AASA41+ pinout, MAX6143AASA41+ application, or MAX6143AASA41+ equivalent, key selection criteria include its 4.096V output (ideal for 12-bit/16-bit SAR ADCs), TEMP pin's 2.1mV/°C linear transducer response, TRIM input for ±6% fine adjustment, and 8-pin SO package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6143AASA41+ uses bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C temperature stability. Its internal design supports both sourcing (up to 30mA) and sinking (up to 2mA) load currents without external compensation.
It integrates three functional blocks: a precision reference core, a die-temperature-sensing circuit (TEMP pin outputting 630mV at +25°C with 2.1mV/°C slope), and an active-low shutdown control (SHDN) that reduces quiescent current to 0.01µA - enabling battery-powered operation in portable test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.06% (±2.46mV) at +25°C - matches common 12-bit/16-bit ADC full-scale codes (e.g., 4.096V = 1V per 1024 LSB). |
| Tempco | 3ppm/°C max (–40°C to +125°C) - ensures ≤±0.5mV drift across full automotive range, critical for metrology-grade measurements. |
| Noise (0.1–10Hz) | 7µVP-P - enables <1LSB noise contribution in 16-bit 4.096V systems (1LSB = 62.5µV). |
| Supply Current | 320–650µA (–40°C to +125°C) - low power enables use in always-on sensor nodes without thermal runaway. |
| Shutdown Current | 0.01µA max - extends battery life >10 years in intermittent-read applications (e.g., wireless sensor transmitters). |
| TEMP Output | 630mV @ +25°C, 2.1mV/°C slope - provides direct die-temperature readout with ±1.5°C accuracy after calibration. |
| Input Voltage Range | +6.1V to +40V - supports wide-input industrial supplies (e.g., 24V rails) with ≥2V headroom above VOUT. |
Pinout & Package
MAX6143AASA41+ is housed in an 8-pin SO (Small Outline Integrated Circuit) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant. Pins 1 and 8 are internally connected and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts +6.1V to +40V; requires ≥2V above VOUT for regulation; decoupling with 0.1µF ceramic recommended. |
| TEMP (Pin 3) | Digital die-temperature transducer output | Provides 630mV @ +25°C, 2.1mV/°C linear output - used for on-chip thermal monitoring or ambient sensing with calibration. |
| GND (Pin 4) | Analog ground reference | Common return for IN, OUT, SHDN, TRIM, and TEMP; must be low-impedance plane to minimize noise coupling. |
| TRIM (Pin 5) | Voltage-adjustment interface | Accepts 0–VOUT divider voltage; enables ±6% output tuning (±246mV) using external potentiometer (e.g., MAX5436). |
| OUT (Pin 6) | Precision reference output | Delivers 4.096V ±0.06%; stable with 0–100µF capacitive loads; sources up to 30mA or sinks 2mA. |
| SHDN (Pin 7) | Active-low enable control | Pull to GND to enter shutdown (IQ ≤ 0.01µA); tie to IN for normal operation; VIH ≥2.0V, VIL ≤0.8V. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±0.06% initial accuracy and 3ppm/°C tempco without external calibration. |
| Integrated temperature sensor (TEMP) | Eliminates need for discrete thermistor or digital sensor in compact designs - reduces BOM count and layout area. |
| No output capacitor required | Saves board space and cost in space-critical applications (e.g., handheld DMMs) while maintaining stability up to 100µF load. |
| TRIM input with ±6% adjustability | Allows field calibration or system-level gain trimming without replacing the reference IC. |
| Automotive-grade operating range | –40°C to +125°C operation meets AEC-Q100 stress requirements for under-hood and industrial control modules. |
Applications
| High-Accuracy Data Acquisition | Automotive Battery Monitoring |
|---|---|
Use Scenario: 16-bit isolated analog input module measuring thermocouple or strain gauge signals in PLC backplanes. IC Role / Device Role / Timing Role: Primary voltage reference for successive-approximation ADC; TEMP pin monitors local die temperature to compensate ADC offset drift. Use Value: 4.096V output aligns with 16-bit full-scale code (65536 × 62.5µV), and 3ppm/°C tempco ensures <±0.5 LSB error over –40°C to +85°C ambient. | Use Scenario: Real-time monitoring of 12V lead-acid or 48V Li-ion battery packs in EV charging controllers. IC Role / Device Role / Timing Role: Stable 4.096V reference for ADC measuring cell voltages; TEMP pin tracks MOSFET driver junction temperature during charge/discharge cycles. Use Value: Enables simultaneous high-accuracy voltage measurement and thermal derating decisions within same IC footprint, reducing component count by 2× vs. separate reference + sensor. |
| Portable Digital Multimeters | Industrial Process Transmitters |
Use Scenario: Handheld DMM with autoranging, true-RMS conversion, and 5½-digit resolution. IC Role / Device Role / Timing Role: Low-noise 4.096V reference for dual-slope integrator ADC; SHDN pin enables automatic sleep mode between measurements. Use Value: 7µVP-P noise ensures <1µV RMS noise floor, supporting 0.005% basic accuracy; 0.01µA shutdown current extends AA battery life to >200 hours. | Use Scenario: 4–20mA loop-powered pressure transmitter with HART communication in oil & gas refineries. IC Role / Device Role / Timing Role: Precision reference for DAC generating 4–20mA current; TEMP pin validates sensor die temperature during SIL2 diagnostics. Use Value: 4.096V output simplifies DAC scaling (e.g., 16-bit DAC → 256µA/LSB), and –40°C to +125°C rating ensures reliability in extreme ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040AIDR | 4.096V output, 3ppm/°C max tempco, but higher 12µVP-P noise and no integrated TEMP output. | Lacks die-temperature sensing; requires external sensor for thermal monitoring. | Select when lowest possible noise is secondary to long-term stability (35ppm/1000h vs. MAX6143's 50ppm). |
| ADR4540BRZ | 4.096V output, 3ppm/°C max tempco, 5.5µVP-P noise, but no TRIM or TEMP pins and requires 10µF output capacitor. | Not pin-compatible; lacks shutdown and trim functionality; needs additional capacitor area. | Choose for ultra-low-noise applications where board space allows extra capacitance and thermal sensing is handled externally. |
Compared with REF5040AIDR and ADR4540BRZ, the MAX6143AASA41+ uniquely integrates reference, temperature transducer, and trim functions in one 8-pin SO package - reducing total solution size by ≥30% and eliminating calibration steps needed for discrete sensor + reference combinations.
Availability
MAX6143AASA41+ is available at Aetrix Electronics and suitable for high-accuracy data acquisition, automotive battery monitoring, and portable digital multimeters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6143AASA41+ 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 industrial, automotive, communications, and computing markets.
The MAX6143 series was developed specifically for high-resolution data converter systems needing integrated voltage reference and die-temperature sensing in a single, automotive-qualified package.
FAQ
What is the guaranteed initial accuracy of the MAX6143AASA41+?
The MAX6143AASA41+ has a guaranteed initial accuracy of ±0.06% (±2.46mV) at +25°C, verified across 100% production testing. This specification applies specifically to the MAX6143AASA41+ variant with 4.096V nominal output and is documented in the Electrical Characteristics table for MAX6143_41 devices. The tighter tolerance supports direct use in 16-bit measurement systems without post-manufacturing calibration.
Does the MAX6143AASA41+ require an output bypass capacitor for stability?
No, the MAX6143AASA41+ does not require an output bypass capacitor for stability. It is internally compensated and remains stable with capacitive loads from 0 to 100µF. This eliminates board area and cost associated with external capacitors - a key advantage in space-constrained applications like handheld test equipment. Input decoupling with a 0.1µF ceramic capacitor is still recommended for optimal line-transient performance.
How is the TEMP output of the MAX6143AASA41+ calibrated and what is its accuracy?
The TEMP output of the MAX6143AASA41+ provides 630mV at +25°C with a slope of 2.1mV/°C, tracking die temperature linearly. Absolute accuracy depends on system-level calibration; typical uncalibrated error is ±3°C over –40°C to +125°C. For highest accuracy, perform a two-point calibration (e.g., at 0°C and 70°C) using the formula VTEMP = 630mV + 2.1mV/°C × (TJ – 25°C). The MAX6143AASA41+ datasheet confirms this behavior across all temperature grades.
Can the MAX6143AASA41+ be used with a 5V supply rail?
No - the MAX6143AASA41+ requires a minimum input voltage of +6.1V (VOUT + 2V) for proper regulation. With a 4.096V output, a 5V supply falls below the required headroom and will cause the device to drop out of regulation. Valid supply ranges begin at +6.1V and extend to +40V. For 5V-system applications, consider the MAX6126AASA25+ (2.5V output, 4.5V min input) or similar lower-VOUT variants.
What is the maximum load current the MAX6143AASA41+ can source while maintaining specified accuracy?
The MAX6143AASA41+ can source up to 30mA while maintaining output voltage accuracy within its specified load regulation limit of 15ppm/mA (typical) over –40°C to +125°C. At 10mA load, the worst-case deviation is ≤150ppm (±0.62mV) - well within the ±0.06% initial accuracy band. Sinking capability is limited to 2mA; exceeding either limit may cause output droop or thermal instability.
MAX6143AASA41+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 3ppm/°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
MAX6143AASA41+ FAQ
1.How can I place an order for MAX6143AASA41+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6143AASA41+ 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 MAX6143AASA41+ reliable?
The price and inventory of MAX6143AASA41+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6143AASA41+ is usually 5 days.
3.What payment methods are accepted for MAX6143AASA41+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6143AASA41+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6143AASA41+?
MAX6143AASA41+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6143AASA41+ 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 MAX6143AASA41+?
For technical support, including MAX6143AASA41+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6143AASA41+ requirements.
6.How does Aetrix verify that MAX6143AASA41+ is sourced from the original manufacturer or authorized distributors?
All MAX6143AASA41+ 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 MAX6143AASA41+ meets industry standards.
7.What is the process for return or replacement of MAX6143AASA41+?
All MAX6143AASA41+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6143AASA41+, 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 MAX6143AASA41+ part is unused and in its original packaging.
Return procedure for MAX6143AASA41+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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