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Analog Devices Inc./Maxim Integrated MAX6220ASA-4.1+
- Part No.:
- MAX6220ASA-4.1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6220ASA-4.1+.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,955
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Product details
Overview
MAX6220ASA-4.1+ from Maxim Integrated is a precision +4.096V voltage reference IC using buried-zener technology, delivering ±0.1% initial accuracy, 20ppm/°C temperature coefficient over –40°C to +125°C, and 2.4µVp-p (0.1Hz–10Hz) output noise - ideal for 16-bit SAR ADCs and high-stability current sources in automotive and industrial instrumentation.
For engineers reviewing the MAX6220ASA-4.1+ datasheet, MAX6220ASA-4.1+ pinout, MAX6220ASA-4.1+ application, or MAX6220ASA-4.1+ equivalent, key selection criteria include guaranteed ±15mA source/sink capability, 8V–40V input range, trim-adjustable output (±24mV min), low-frequency noise performance, and stability with all capacitive loads up to 100µF.
Technical Context
The MAX6220ASA-4.1+ employs a thermally compensated buried-zener core with on-chip curvature correction, enabling flat temperature drift across the full automotive range. Its output is buffered by a low-impedance emitter-follower stage, supporting fast transient response (5µs turn-on settling to ±0.01%) and stable operation under dynamic load conditions.
It integrates dedicated NR and TRIM pins for external wideband noise filtering (via 1µF capacitor) and precision output adjustment (±24mV typical), without degrading long-term stability (20ppm/1000hr) or temperature hysteresis (20ppm). Input ripple rejection exceeds 85dB at 1kHz with CNR = 1µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +4.096V nominal, with ±0.004V (±0.1%) initial tolerance at +25°C - ensures direct compatibility with 12-bit DACs and 16-bit ADCs requiring exact 4.096V full-scale reference. |
| Temp. Coefficient | 20ppm/°C max over –40°C to +125°C - enables <±0.5mV total drift across automotive operating range, critical for uncalibrated sensor front-ends. |
| Output Noise | 2.4µVp-p (0.1Hz–10Hz), 2.0µVRMS (10Hz–1kHz) - preserves SNR in precision data acquisition systems where reference noise dominates system ENOB. |
| Load Regulation | 30ppm/mA max sinking, 15ppm/mA max sourcing - maintains <±12µV error at ±15mA load swing, suitable for driving op-amp bias networks and active filters. |
| Input Range | 8V to 40V DC - supports direct connection to unregulated automotive battery rails (9V–16V) and industrial 24V systems without pre-regulation. |
| Supply Current | 3.5mA typical - enables low-power operation in always-on monitoring circuits while sustaining full output drive capability. |
| Long-Term Stability | 20ppm/1000hr - guarantees <±0.083mV drift per year, reducing recalibration frequency in metrology-grade equipment. |
Pinout & Package
MAX6220ASA-4.1+ is housed in an 8-pin SOIC (SO) package with standard JEDEC MS-012AC dimensions (4.9mm × 6.0mm, 1.27mm pitch). Pins 1, 7, and 8 are internally connected and must remain unconnected in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8V–40V DC; internal regulation isolates output from input ripple - enables clean reference generation from noisy power rails. |
| GND (Pin 4) | Analog ground reference | Must be star-connected to minimize ground bounce; separates reference return from digital or power ground paths. |
| OUT (Pin 6) | Precision voltage output | Low-impedance buffered output capable of sourcing/sinking ±15mA; stable with 0–100µF capacitive loads - eliminates need for external buffer in most applications. |
| TRIM (Pin 5) | External output adjustment | Accepts resistive divider to adjust output ±24mV (±0.59%); trimming does not affect tempco or long-term stability - supports field calibration. |
| NR (Pin 3) | Noise reduction node | Connects to 1µF capacitor to GND to reduce wideband noise; optional - omission retains full spec compliance but increases 10Hz–1kHz noise by ~0.7µVRMS. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers ultra-low 1/f noise and superior long-term stability vs. bandgap references - essential for metrology and calibration equipment. |
| Trim-adjustable output | ±24mV minimum adjustment range via external potentiometer - enables end-of-line calibration without firmware or laser trimming. |
| Capacitive-load immunity | Stable with 0µF to 100µF output capacitance - simplifies layout and eliminates risk of oscillation when using ceramic decoupling or EMI filters. |
| High PSRR | 85dB ripple rejection at 1kHz with NR capacitor - allows direct use after switching regulators without additional LDO filtering. |
| Automotive-grade operation | Specified from –40°C to +125°C with no derating - qualified for engine control units, battery management, and ADAS sensor signal chains. |
Applications
| High-Accuracy Industrial DAQ | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: 16-bit isolated analog input module measuring thermocouple and RTD signals in PLC backplanes. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope and SAR ADCs, providing full-scale calibration point and ratiometric excitation for bridge sensors. Use Value: ±0.1% initial accuracy and 20ppm/°C tempco ensure <±0.02% system gain error over temperature - eliminating per-unit calibration. |
Use Scenario: Cell-voltage measurement in 12S Li-ion battery packs for EVs and energy storage systems. IC Role / Device Role / Timing Role: Reference for 16-bit delta-sigma ADCs monitoring individual cell voltages with <1mV resolution. Use Value: 2.4µVp-p low-frequency noise enables <16.5ENOB at 10SPS - meeting ISO 26262 ASIL-C voltage monitoring requirements. |
| Precision Current Source | ATE Power Supply Calibration |
|
Use Scenario: Programmable 4–20mA transmitter with HART modulation in hazardous-area process transmitters. IC Role / Device Role / Timing Role: Stable reference for op-amp-based Howland current source, defining loop current accuracy independent of supply variation. Use Value: 8V–40V input range and ±15mA sink capability allow direct derivation from 24V loop supply - removing need for auxiliary rail. |
Use Scenario: Self-calibrating bench power supply with 0.01% output accuracy and automated verification sequence. IC Role / Device Role / Timing Role: Master reference for DAC-controlled voltage/current setpoints and internal DMM measurements during factory calibration. Use Value: 20ppm/1000hr long-term stability reduces annual recalibration labor by >70% versus standard bandgap references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR444BRZ | 4.096V output, 3ppm/°C max tempco, 1.2µVp-p noise, but only ±10mA output drive and 3.3V–18V input range. | Better noise/tempco, but insufficient for high-current sensor biasing or automotive 24V direct-input use cases. | Select ADR444BRZ only when ultra-low drift (<±0.15mV over –40°C to +125°C) is prioritized over drive strength and input voltage flexibility. |
| REF5040AIDR | 4.096V output, 3ppm/°C max tempco, 1.6µVp-p noise, ±10mA drive, 4.6V–18V input, requires external buffer for >5mA loads. | Superior stability and noise, but incompatible with unregulated 24V/40V supplies and cannot directly drive 15mA loads. | Choose REF5040AIDR for lab-grade instrumentation where power supply is tightly regulated and load current ≤5mA. |
Compared with ADR444BRZ and REF5040AIDR, the MAX6220ASA-4.1+ trades minor noise/tempco margin for robustness in harsh environments - its 8V–40V input, ±15mA drive, and capacitive-load immunity make it uniquely suited for automotive and industrial systems where supply quality and load variability are uncontrolled.
Availability
MAX6220ASA-4.1+ is available at Aetrix Electronics and suitable for high-accuracy industrial DAQ, automotive battery monitoring, and precision current source applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6220ASA-4.1+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications - emphasizing precision, reliability, and integration.
The MAX6220 series was developed specifically for high-resolution data conversion systems requiring laboratory-grade voltage reference stability in real-world environments - targeting 16-bit+ ADC/DAC interfaces, precision sensor signal conditioning, and automated test equipment calibration.
FAQ
What is the guaranteed initial accuracy of the MAX6220ASA-4.1+?
The MAX6220ASA-4.1+ has a guaranteed ±0.1% initial accuracy at +25°C, corresponding to ±4.1mV tolerance around its nominal 4.096V output. This specification is tested and binned during production, ensuring every unit meets this limit before shipment - critical for systems avoiding post-assembly calibration.
Can the MAX6220ASA-4.1+ operate directly from a 24V automotive supply?
Yes, the MAX6220ASA-4.1+ supports an input voltage range of 8V to 40V DC, making it fully compatible with nominal 24V industrial and automotive systems - including cold-crank (down to ~6V) and load-dump (up to 40V) transients when used with appropriate input protection circuitry.
Does the MAX6220ASA-4.1+ require an external capacitor on the NR pin?
No - the NR pin is optional. Adding a 1µF capacitor to NR reduces wideband noise (10Hz–1kHz) by ~0.7µVRMS, but the MAX6220ASA-4.1+ meets all specifications with NR left open. Omitting the capacitor simplifies layout and reduces BOM count where ultra-low noise is not required.
What is the maximum capacitive load the MAX6220ASA-4.1+ can drive stably?
The MAX6220ASA-4.1+ is specified stable with output capacitive loads from 0µF to 100µF across the full –40°C to +125°C temperature range and full ±15mA load current. This eliminates phase-margin concerns and enables direct use with bulk ceramic or tantalum output capacitors for EMI suppression.
How does the TRIM pin function on the MAX6220ASA-4.1+?
The TRIM pin on the MAX6220ASA-4.1+ accepts a resistive divider between OUT and GND to adjust the output voltage by ±24mV (±0.59%) - achieved with a standard 10kΩ potentiometer. This external trimming does not degrade temperature coefficient or long-term stability, enabling field calibration without rework.
MAX6220ASA-4.1+ 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:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.4µVp-p
- Noise - 10Hz to 10kHz:
- 2µVrms
- Voltage - Input:
- 8V ~ 40V
- Current - Supply:
- 3.5mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6220ASA-4.1+ FAQ
1.How can I place an order for MAX6220ASA-4.1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6220ASA-4.1+ 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 MAX6220ASA-4.1+ reliable?
The price and inventory of MAX6220ASA-4.1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6220ASA-4.1+ is usually 5 days.
3.What payment methods are accepted for MAX6220ASA-4.1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6220ASA-4.1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6220ASA-4.1+?
MAX6220ASA-4.1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6220ASA-4.1+ 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 MAX6220ASA-4.1+?
For technical support, including MAX6220ASA-4.1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6220ASA-4.1+ requirements.
6.How does Aetrix verify that MAX6220ASA-4.1+ is sourced from the original manufacturer or authorized distributors?
All MAX6220ASA-4.1+ 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 MAX6220ASA-4.1+ meets industry standards.
7.What is the process for return or replacement of MAX6220ASA-4.1+?
All MAX6220ASA-4.1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6220ASA-4.1+, 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 MAX6220ASA-4.1+ part is unused and in its original packaging.
Return procedure for MAX6220ASA-4.1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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