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Analog Devices Inc./Maxim Integrated MAX6143AASA33+
- Part No.:
- MAX6143AASA33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6143AASA33+.pdf
- Description:
- IC VREF SERIES 0.06% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
MAX6143AASA33+ from Maxim Integrated is a high-precision, low-noise voltage reference with integrated temperature-sensing output (TEMP), delivering a factory-trimmed +3.3V reference with ±0.06% initial accuracy, 3ppm/°C max temperature coefficient over –40°C to +125°C, and 5µVP-P (0.1Hz–10Hz) noise - ideal for 16-bit+ ADC/DAC systems requiring stable excitation and thermal monitoring.
For engineers reviewing the MAX6143AASA33+ datasheet, MAX6143AASA33+ pinout, MAX6143AASA33+ application, or MAX6143AASA33+ equivalent, this page delivers verified specifications, automotive-grade package details, TRIM-adjustable architecture, TEMP transducer calibration data, and real-world selection guidance for precision analog signal chains.
Technical Context
The MAX6143AASA33+ uses bandgap-based topology with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C tempco and ±0.06% initial accuracy. Its TEMP pin provides a linear 2.1mV/°C output referenced to die temperature, enabling direct thermal compensation without external sensors.
It features active-low SHDN control (VIH = 2.0V, VIL = 0.8V), TRIM input supporting ±6% output adjustment via resistive divider, and operates from (VOUT + 2V) to +40V supply - eliminating need for external bypass capacitors while remaining stable up to 100µF capacitive load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +3.300V nominal, ±0.06% initial accuracy (3.2980V to 3.3020V at +25°C) - ensures ≤1 LSB error in 16-bit systems across full temperature range |
| Tempco (–40°C to +125°C) | 3ppm/°C max - enables <±120ppm total drift over 165°C span, critical for metrology-grade references |
| Noise (0.1Hz–10Hz) | 5µVP-P typical - supports high-resolution digitization without added filtering overhead |
| Supply Current | 320–650µA (–40°C to +125°C), 0.01µA shutdown - extends battery life in portable instrumentation |
| Load Drive | Sources up to 30mA / sinks 2mA - directly drives ADC reference inputs, op-amp buffers, or small logic loads |
| TEMP Output | 630mV @ +25°C, 2.1mV/°C slope - provides calibrated die-temperature sensing with ±1.5°C typical accuracy |
| Input Voltage Range | +5.3V to +40V - accommodates wide-input industrial supplies without pre-regulation |
Pinout & Package
MAX6143AASA33+ is housed in an 8-pin SOIC (SO) package (JEDEC MS-012AA, 150-mil width), with pins 1 and 8 internally connected and not externally accessible. The device is rated for automotive operation (–40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (IN) | Positive power-supply input | Accepts 5.3V–40V; requires no input capacitor for stability but benefits from 0.1µF ceramic decoupling near pin |
| 3 (TEMP) | Digital-temperature proportional analog output | Provides 630mV @ +25°C, 2.1mV/°C slope; must be unloaded for accurate die-temp measurement |
| 4 (GND) | Analog ground reference | Common return for IN, OUT, SHDN, TRIM, and TEMP; requires low-impedance connection to minimize noise coupling |
| 5 (TRIM) | Output voltage adjustment node | Accepts resistive divider between OUT and GND; enables ±6% fine-tuning of 3.3V output without trimming resistors |
| 6 (OUT) | Precision reference voltage output | Delivers regulated +3.3V; stable with 0–100µF capacitive loads; no external bypass required |
| 7 (SHDN) | Active-low shutdown control | Pull to GND to reduce supply current to 0.01µA; tie to IN for normal operation; VIH ≥2.0V, VIL ≤0.8V |
Key Features
| Feature | Design Value |
|---|---|
| Bandgap-based architecture | Enables ultra-low 3.8–18µVP-P noise across output voltages while maintaining ±0.06% accuracy without post-calibration |
| Integrated TEMP output | Eliminates need for discrete temperature sensor in space-constrained designs; enables real-time die-temp compensation of reference drift |
| TRIM-adjustable output | Supports field calibration or system-level gain matching using simple potentiometer network - no laser trimming equipment required |
| No output capacitor required | Saves PCB area and BOM cost; removes risk of instability from ESR/ESL variations in external capacitors |
| Automotive temperature range | Validated operation from –40°C to +125°C ensures reliability in engine control units, ADAS sensors, and under-hood electronics |
Applications
| Industrial Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: High-accuracy 16-bit SAR ADC front-end in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Provides stable +3.3V reference for ADC conversion and biasing of instrumentation amplifiers. Use Value: 3ppm/°C tempco and 5µVP-P noise ensure <±0.5 LSB integral nonlinearity drift over –25°C to +70°C ambient range. |
Use Scenario: Reference and thermal monitoring for pressure/temperature sensor interface in engine control unit (ECU). IC Role / Device Role / Timing Role: Supplies +3.3V reference to sensor signal chain while feeding TEMP output to MCU ADC for die-temp compensation. Use Value: Dual-function integration reduces component count by one IC and eliminates separate temperature sensor calibration. |
| Portable Test Equipment | Digital Voltmeter (DVM) Core Reference |
|
Use Scenario: Battery-powered handheld multimeter requiring long-term stability and low quiescent current. IC Role / Device Role / Timing Role: Primary reference source for autoranging DMM ASIC; SHDN used during sleep mode. Use Value: 0.01µA shutdown current extends 2xAA battery life to >1 year in standby; ±0.06% accuracy meets Class II DMM specs. |
Use Scenario: Precision 7½-digit bench DVM requiring ultra-stable reference with minimal thermal hysteresis. IC Role / Device Role / Timing Role: Main reference for dual-slope integrator and auto-zero amplifier stages. Use Value: 120ppm thermal hysteresis and 50ppm/1000h long-term stability meet ANSI C12.20 Class 0.1 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3333AIDBVR | 3.3V, ±0.1% initial accuracy, 10ppm/°C tempco, 30µA supply current, SOT-23-5 package | Lacks TEMP output and TRIM capability; lower drive strength (25mA); optimized for ultra-low-power, not high-precision metrology | Select REF3333AIDBVR only when board space and quiescent current are primary constraints and ±0.1% accuracy suffices. |
| ADR4533BRZ | 3.3V, ±0.02% initial accuracy, 2ppm/°C tempco, 950µA supply current, SOIC-8 package, no TEMP/SHDN/TRIM | Higher accuracy and lower tempco, but no shutdown, trim, or temperature output; requires external bypass capacitor | Choose ADR4533BRZ when ultimate stability is required and system-level thermal management and power control are handled externally. |
Compared with REF3333AIDBVR and ADR4533BRZ, MAX6143AASA33+ uniquely combines automotive-grade temperature range, integrated TEMP transducer, TRIM adjustability, and zero-bypass stability - making it the only option among the three that supports self-compensating, space-efficient, and feature-rich precision reference design.
Availability
MAX6143AASA33+ is available at Aetrix Electronics and suitable for industrial data acquisition, automotive sensor interfaces, portable test equipment, and digital voltmeter applications requiring stable component supply, long-lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MAX6143AASA33+ 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) is a leader in precision analog, mixed-signal, and power-management ICs, serving industrial, automotive, communications, and computing markets since 1983.
The MAX6143 series was designed specifically for high-resolution data converter systems needing simultaneous voltage reference stability and on-chip thermal intelligence - bridging the gap between traditional references and smart sensor interface ICs.
FAQ
What is the guaranteed initial accuracy of MAX6143AASA33+ over temperature?
The MAX6143AASA33+ guarantees ±0.06% initial accuracy at +25°C, with output voltage specified from 3.2980V to 3.3020V under no-load conditions. This tolerance remains valid across the full –40°C to +125°C operating range due to its 3ppm/°C max temperature coefficient and curvature correction circuitry - confirmed in the MAX6143_33 electrical characteristics table.
Does MAX6143AASA33+ require an output bypass capacitor for stability?
No, the MAX6143AASA33+ does not require an output bypass capacitor for stability. It is explicitly characterized as stable with capacitive loads from 0 to 100µF, eliminating the need for external components and reducing PCB area and BOM cost - a key differentiator versus most competing references like ADR4533BRZ that mandate external bypassing.
How is the TEMP output of MAX6143AASA33+ calibrated and what is its sensitivity?
The TEMP output of MAX6143AASA33+ is factory-calibrated to 630mV at +25°C with a sensitivity of 2.1mV/°C across –40°C to +125°C. This linear relationship enables direct die-temperature calculation using VTEMP = 630mV + 2.1mV/°C × (TA − 25°C), assuming negligible self-heating - verified in the "TEMP OUTPUT" section of the MAX6143_33 electrical characteristics table.
Can MAX6143AASA33+ be trimmed to a custom output voltage, and how is it done?
Yes, MAX6143AASA33+ supports ±6% output voltage adjustment via its TRIM pin. Connect a resistive divider (e.g., 50kΩ potentiometer) between OUT and GND, with wiper tied to TRIM. The output changes per ∆VOUT = 2 × (VTRIM − VOUT/2) × k, where k ≈ ±6% - detailed in the "Trimming the Output Voltage" section of the datasheet.
What is the maximum supply voltage and minimum headroom required for MAX6143AASA33+ to regulate properly?
MAX6143AASA33+ accepts input voltages from +5.3V to +40V. Its minimum input-output differential (dropout) is specified as ~1.5V at 30mA load and +25°C - meaning VIN must exceed VOUT by at least 1.5V for full regulation. At higher temperatures or currents, dropout increases slightly, as shown in Figure MAX6143toc09 and MAX6143toc10.
MAX6143AASA33+ 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.06%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 5µVp-p
- Noise - 10Hz to 10kHz:
- 9.3µVrms
- Voltage - Input:
- 5.3V ~ 40V
- Current - Supply:
- 650µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6143AASA33+ FAQ
1.How can I place an order for MAX6143AASA33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6143AASA33+ 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 MAX6143AASA33+ reliable?
The price and inventory of MAX6143AASA33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6143AASA33+ is usually 5 days.
3.What payment methods are accepted for MAX6143AASA33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6143AASA33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6143AASA33+?
MAX6143AASA33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6143AASA33+ 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 MAX6143AASA33+?
For technical support, including MAX6143AASA33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6143AASA33+ requirements.
6.How does Aetrix verify that MAX6143AASA33+ is sourced from the original manufacturer or authorized distributors?
All MAX6143AASA33+ 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 MAX6143AASA33+ meets industry standards.
7.What is the process for return or replacement of MAX6143AASA33+?
All MAX6143AASA33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6143AASA33+, 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 MAX6143AASA33+ part is unused and in its original packaging.
Return procedure for MAX6143AASA33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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