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Analog Devices Inc./Maxim Integrated MAX6143BASA33+
- Part No.:
- MAX6143BASA33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6143BASA33+.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:146
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Product details
Overview
MAX6143BASA33+ from Maxim Integrated is a high-precision, low-noise voltage reference with integrated temperature-sensing output (TEMP), 3.3V nominal output, ±0.10% initial accuracy, 10ppm/°C max temperature coefficient over –40°C to +125°C, and active-low shutdown (SHDN) reducing supply current to 0.01µA. It serves as a stable reference for 14–16-bit ADCs/DACs in automotive sensor signal conditioning.
For engineers reviewing the MAX6143BASA33+ datasheet, MAX6143BASA33+ pinout, MAX6143BASA33+ application, or MAX6143BASA33+ equivalent, key selection considerations include its 3.3V fixed output with ±6% trim range, TEMP output at 630mV @ 25°C with 2.1mV/°C slope, no required output capacitor, and SO-8 package compatibility with space-constrained automotive and industrial PCB layouts.
Technical Context
The MAX6143BASA33+ uses bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve low drift and high DC accuracy. Its TEMP output provides a linear voltage proportional to die temperature, enabling on-chip thermal monitoring without external sensors.
It features dual regulation paths: one for precision reference generation (OUT), and another for temperature transduction (TEMP), both sharing the same die thermal environment. The TRIM input allows fine adjustment via external resistive divider, while SHDN enables ultra-low-power sleep mode with sub-10nA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V nominal, with ±0.10% initial tolerance (3.2967V to 3.3033V at +25°C) |
| Tempco (–40°C to +125°C) | 10ppm/°C max - ensures ≤±0.83mV drift across full automotive temperature range |
| Noise (0.1Hz–10Hz) | 5µVP-P typical - supports 16-bit ADCs without added noise floor degradation |
| Supply Current | 650µA max at +25°C - enables low-power operation in battery-backed systems |
| Shutdown Current | 0.01µA typical - extends shelf life and reduces standby power in always-on modules |
| TEMP Output | 630mV at +25°C, 2.1mV/°C slope - provides direct Kelvin-to-voltage conversion for die temperature sensing |
| Load Drive | Sources up to 30mA / sinks 2mA - drives ADC reference inputs and small buffers without external op-amp |
Pinout & Package
MAX6143BASA33+ is housed in an 8-pin SOIC (SO-8) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | I.C. | Internally connected - must remain unconnected on PCB; no external routing |
| 2 | IN | Positive supply input (5.3V to 40V); requires local 0.1µF ceramic bypass near pin |
| 3 | TEMP | Temperature-proportional analog output (630mV @ 25°C, +2.1mV/°C); high-impedance, must not be loaded |
| 4 | GND | Analog ground reference - connect directly to low-impedance ground plane |
| 5 | TRIM | Adjustment node for ±6% output tuning via external resistor divider between OUT and GND |
| 6 | OUT | Stable 3.3V reference output - stable with capacitive loads up to 100µF; no bypass required |
| 7 | SHDN | Active-low enable - tie to IN for normal operation; pull to GND to enter 0.01µA shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Linear TEMP output (630mV @ 25°C, 2.1mV/°C) eliminates need for discrete thermal diode or NTC network |
| No output capacitor required | Guaranteed stability with 0–100µF capacitive load - saves board area and BOM cost in compact designs |
| Trimmable reference | ±6% output adjustment via TRIM pin using simple resistive divider - enables system-level calibration without trimming resistors |
| Ultra-low shutdown current | 0.01µA typical - supports >10-year battery life in infrequently powered automotive diagnostic modules |
| Automotive-grade operating range | –40°C to +125°C ambient operation - qualified for under-hood and transmission control unit environments |
Applications
| ADC Reference Source | Automotive Sensor Signal Chain |
|---|---|
Use Scenario: High-resolution SAR or sigma-delta ADC in precision data acquisition systems requiring <1 LSB error over temperature. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC full-scale definition and ratiometric sensor excitation. Use Value: 10ppm/°C tempco and 5µVP-P noise ensure ≤0.5 LSB error in 16-bit conversions across –40°C to +125°C. | Use Scenario: Engine coolant temperature (ECT) or exhaust gas recirculation (EGR) sensor interface in Tier-1 automotive ECUs. IC Role / Device Role / Timing Role: Supplies regulated 3.3V reference to sensor front-end amplifiers and concurrently monitors die temperature via TEMP pin. Use Value: Dual-function capability reduces component count; TEMP output enables real-time thermal derating of sensor gain/offset compensation algorithms. |
| Digital Voltmeter Front-End | Industrial PLC Analog Input Module |
Use Scenario: Portable handheld DVM with 5½-digit resolution and auto-ranging functionality. IC Role / Device Role / Timing Role: Primary reference for internal 24-bit delta-sigma ADC; TRIM used for factory calibration against metrology-grade standards. Use Value: ±0.10% initial accuracy and 120ppm thermal hysteresis support Class I accuracy certification without post-calibration drift correction. | Use Scenario: Modular analog input card accepting 4–20mA, 0–10V, and thermocouple signals in factory automation controllers. IC Role / Device Role / Timing Role: Shared 3.3V reference for multiple isolated ADC channels; SHDN enables per-channel power gating during idle cycles. Use Value: 30mA sourcing capability drives multiple instrumentation amplifier bias networks; shutdown mode cuts channel standby power by >99.9%. |
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, SOT-23-5, 180µA supply current, no TEMP output | Lacks integrated temperature sensor and TRIM function; smaller footprint but no die thermal monitoring | Select when board space is critical and temperature sensing is handled externally |
| ADR4533BRZ | 3.3V, ±0.02% initial accuracy, 3ppm/°C, SO-8, 950µA supply current, no SHDN or TEMP | Higher accuracy and lower tempco, but no shutdown or temperature transducer; higher quiescent current | Select when ultimate DC stability is required and power/thermal monitoring are secondary |
Compared with REF3333AIDBVR and ADR4533BRZ, the MAX6143BASA33+ uniquely integrates temperature sensing and shutdown in an SO-8 package at moderate accuracy-making it optimal for automotive and industrial systems needing multi-function integration without sacrificing reliability.
Availability
MAX6143BASA33+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input modules, portable digital multimeters, and high-resolution data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6143BASA33+ 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 series was developed specifically for high-accuracy, multi-function reference needs in harsh-environment systems-combining voltage reference, temperature sensing, and power control in a single SO-8 device.
FAQ
What is the guaranteed initial accuracy of the MAX6143BASA33+?
The MAX6143BASA33+ has a guaranteed initial accuracy of ±0.10% at +25°C, corresponding to a 3.3V output tolerance of ±3.3mV (3.2967V to 3.3033V). This specification is production-tested and applies across the full –40°C to +125°C operating range per the datasheet's "MAX6143B_33" electrical characteristics table.
Does the MAX6143BASA33+ require an output bypass capacitor for stability?
No, the MAX6143BASA33+ does not require an output bypass capacitor for stability. It is internally compensated and remains stable with capacitive loads from 0 to 100µF. A 0.1µF ceramic capacitor is recommended on the IN pin for improved line-transient response, but the OUT pin operates reliably with no external capacitance.
How is the TEMP output of the MAX6143BASA33+ calibrated and used?
The TEMP output of the MAX6143BASA33+ provides 630mV at +25°C with a slope of 2.1mV/°C, enabling direct die temperature measurement. It is calibrated at wafer test and requires no external calibration. For accurate readings, TEMP must be buffered (e.g., with unity-gain op-amp) before ADC sampling and must not be loaded - maximum recommended source current is 100nA.
Can the MAX6143BASA33+ be used with a 3.3V supply rail?
No - the MAX6143BASA33+ requires a minimum input voltage of (VOUT + 2V) = 5.3V. It cannot operate from a 3.3V rail. Valid input range is 5.3V to 40V, making it suitable for 5V, 12V, or 24V automotive and industrial supply buses, but not low-voltage logic rails.
What is the maximum load current the MAX6143BASA33+ can source or sink?
The MAX6143BASA33+ can source up to 30mA into a load and sink up to 2mA. Load regulation is specified at ±15ppm/mA (sourcing) and ±900ppm/mA (sinking) over –40°C to +125°C. For loads exceeding 10mA, verify dropout voltage margin using the "MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT" curves in the datasheet.
MAX6143BASA33+ 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:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°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
MAX6143BASA33+ FAQ
1.How can I place an order for MAX6143BASA33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6143BASA33+ 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 MAX6143BASA33+ reliable?
The price and inventory of MAX6143BASA33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6143BASA33+ is usually 5 days.
3.What payment methods are accepted for MAX6143BASA33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6143BASA33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6143BASA33+?
MAX6143BASA33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6143BASA33+ 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 MAX6143BASA33+?
For technical support, including MAX6143BASA33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6143BASA33+ requirements.
6.How does Aetrix verify that MAX6143BASA33+ is sourced from the original manufacturer or authorized distributors?
All MAX6143BASA33+ 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 MAX6143BASA33+ meets industry standards.
7.What is the process for return or replacement of MAX6143BASA33+?
All MAX6143BASA33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6143BASA33+, 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 MAX6143BASA33+ part is unused and in its original packaging.
Return procedure for MAX6143BASA33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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