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Analog Devices Inc./Maxim Integrated MAX6241AEPA
- Part No.:
- MAX6241AEPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6241AEPA.pdf
- Description:
- IC VREF SERIES 0.02% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
MAX6241AEPA from Maxim Integrated is a precision 4.096V buried-zener voltage reference IC with ±0.02% initial accuracy, 3.0ppm/°C max temperature coefficient over –40°C to +85°C, and 2.4µVP-P (0.1Hz–10Hz) output noise - designed for high-resolution ADC/DAC biasing in metrology-grade instrumentation and automated test equipment.
For engineers reviewing the MAX6241AEPA datasheet, MAX6241AEPA pinout, MAX6241AEPA application, or MAX6241AEPA equivalent, key selection criteria include its guaranteed ±15mA sourcing/sinking capability, 8-pin plastic DIP package with industry-standard pinout, trim-adjustable output (±24mV), and stability under all capacitive loads up to 100µF without external compensation.
Technical Context
The MAX6241AEPA employs buried-zener core technology with low-power temperature compensation to achieve near-zero curvature across its full operating range. Its internal architecture supports simultaneous high-accuracy DC regulation and low-noise spectral performance via dedicated NR (noise reduction) and TRIM terminals.
It delivers stable 4.096V output referenced to GND with guaranteed line regulation ≤35ppm/V (10V–36V input), load regulation ≤7ppm/mA (sourcing), and long-term drift of only 20ppm/1000h - enabling use in calibration-critical systems where reference drift directly impacts measurement traceability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±0.001V at +25°C - enables exact 12-bit full-scale alignment in 4.096V-referenced SAR ADCs |
| Tempco (max) | 3.0ppm/°C (–40°C to +85°C) - ensures <±0.5mV total drift over industrial temperature range |
| Noise (0.1–10Hz) | 2.4µVP-P - preserves ENOB in 16-bit+ data converters without post-filtering |
| Initial Accuracy | ±0.02% - eliminates need for system-level calibration in portable DVMs and sensor transmitters |
| Output Current | ±15mA - drives multiple op-amp reference inputs or DAC bias networks without external buffers |
| Long-Term Stability | 20ppm/1000h - meets 1-year recalibration intervals in lab-grade equipment |
| Supply Voltage | 8V to 36V - compatible with unregulated industrial rails and battery-backed supplies |
Pinout & Package
MAX6241AEPA is housed in an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; pins 1, 7, and 8 are internally connected and must remain unconnected in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | Unused - no external connection; floating or tied to GND has no effect |
| 2 | IN | Positive supply input (8V–36V); requires local 0.1µF bypass to GND for ripple rejection |
| 3 | NR | Noise reduction node - accepts 1µF capacitor to ground for wideband noise suppression |
| 4 | GND | Analog ground reference - must be star-connected to minimize ground bounce in mixed-signal systems |
| 5 | TRIM | External voltage adjust input - enables ±24mV fine-tuning via 10kΩ potentiometer without degrading tempco |
| 6 | OUT | Stable 4.096V reference output - capable of sourcing/sinking ±15mA with <100µV load-induced error |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1/f noise floor among precision references - critical for sub-µV resolution measurements |
| Trim-adjustable output | ±24mV adjustment range allows field calibration to counteract PCB trace resistance and solder joint offsets |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in noisy environments |
| Transient response | 8µs settling to ±0.01% after power-on - enables fast-reference activation in burst-mode data acquisition |
| Supply ripple rejection | ≥80dB @ 1kHz (with NR cap) - suppresses switching regulator noise coupling into sensitive analog signal chains |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters (DVMs) |
|---|---|
Use Scenario: 16-bit delta-sigma ADC front-end in portable handheld DMMs requiring stable reference over battery discharge cycles. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core and internal DAC-based auto-zero circuitry. Use Value: 3.0ppm/°C tempco and 20ppm/1000h stability ensure <±1 LSB error over 12 months without recalibration. | Use Scenario: Benchtop 6½-digit DVM using dual-slope integration with microcontroller-controlled range scaling. IC Role / Device Role / Timing Role: Precision 4.096V reference for integrator ramp generation and comparator threshold setting. Use Value: ±0.02% initial accuracy eliminates factory trim steps; ±15mA drive supports multiple integrator stages simultaneously. |
| Automated Test Equipment (ATE) | Precision Current Sources |
Use Scenario: Channel card in semiconductor ATE system generating programmable analog stimulus with <10ppm total uncertainty. IC Role / Device Role / Timing Role: Reference for 16-bit current-output DAC driving device-under-test bias networks. Use Value: 2.4µVP-P low-frequency noise prevents false fails during low-current leakage testing (<100nA). | Use Scenario: 4-wire RTD transmitter with HART modulation, requiring stable excitation current independent of loop voltage. IC Role / Device Role / Timing Role: Reference for op-amp-based Howland current source controlling 100Ω/1kΩ RTD bridges. Use Value: Load-regulation spec of ≤7ppm/mA ensures <±0.005% current error across full 4–20mA span despite varying loop impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040IDR | 4.096V, 3ppm/°C max, SO-8 package, 3.8µVP-P noise, 10mA max output | Limited sink capability (no sinking), higher noise, lower drive strength | Prefer when board space is constrained and ±15mA bidirectional drive is not required |
| ADR444BRZ | 4.096V, 3ppm/°C max, SO-8, 1.8µVP-P noise, ±10mA output, higher cost | Lower noise but reduced output current; requires external trim resistor network | Choose when ultra-low noise dominates over drive strength and cost sensitivity |
Compared with REF5040IDR and ADR444BRZ, the MAX6241AEPA uniquely combines full ±15mA bidirectional drive, DIP package for prototyping and legacy systems, and integrated NR/trim terminals - making it optimal for industrial calibration hardware and repair-friendly test fixtures where robustness and serviceability matter.
Availability
MAX6241AEPA is available at Aetrix Electronics and suitable for high-accuracy industrial process control, automated test equipment, and portable digital multimeters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6241AEPA 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 semiconductors for precision, power, and interface applications.
The MAX62xx family targets metrology-grade voltage references - engineered specifically for applications demanding laboratory-level accuracy, low drift, and low noise in compact, single-chip form factors.
FAQ
What is the maximum operating temperature range for MAX6241AEPA?
The MAX6241AEPA is rated for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in the Ordering Information table and Electrical Characteristics sections of the official datasheet, where all "E" grade variants (including MAX6241AEPA) are explicitly specified for –40°C to +85°C operation with guaranteed 3.0ppm/°C max temperature coefficient and ±0.02% initial accuracy across that full range. The "E" suffix denotes this temperature grade.
Can MAX6241AEPA drive a 10kΩ load while maintaining accuracy?
Yes. With ±15mA sourcing/sinking capability and <7ppm/mA load regulation (≤0.028mV error at 15mA), the MAX6241AEPA easily drives a 10kΩ load drawing only 0.41mA (4.096V/10kΩ). At that current, output error due to load regulation is <0.003mV - well within its ±0.02% (±0.82mV) initial accuracy spec. The device remains stable with any capacitive load up to 100µF, further ensuring robustness in real-world circuits.
Does MAX6241AEPA require an external capacitor on the NR pin?
No - the NR pin is optional. The MAX6241AEPA functions fully without any capacitor; adding a 1µF capacitor to NR reduces wideband noise (10Hz–1kHz) by ~10dB, per Typical Operating Characteristics Figure 11. Leaving NR open maintains baseline 2.4µVP-P (0.1–10Hz) noise performance. The datasheet states "Leave open if not used", confirming no mandatory external component is needed for basic operation.
Is MAX6241AEPA pin-compatible with other MAX62xx variants in the same package?
Yes - all MAX6225/MAX6241/MAX6250 devices in the 8-pin PDIP package (e.g., MAX6225AEPA+, MAX6241AEPA, MAX6250AEPA+) share identical pinout, terminal functions, and footprint. Pin 2 is IN, pin 3 is NR, pin 4 is GND, pin 5 is TRIM, pin 6 is OUT, and pins 1/7/8 are I.C. This uniformity allows direct substitution between 2.5V/4.096V/5.0V versions during design iteration or inventory optimization, provided output voltage and tempco requirements align.
What is the purpose of the TRIM pin on MAX6241AEPA?
The TRIM pin on MAX6241AEPA enables precise external adjustment of the output voltage by ±24mV (±0.59%) using a 10kΩ potentiometer connected between OUT and GND, with its wiper to TRIM - as shown in Figure 1 of the datasheet. This adjustment does not degrade temperature coefficient or long-term stability. It is used to compensate for system-level errors such as PCB trace resistance, solder joint voltage drops, or minor gain errors in downstream amplifier stages.
MAX6241AEPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series, Buried Zener
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 3ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.4µVp-p
- Noise - 10Hz to 10kHz:
- 2µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3.2mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6241AEPA FAQ
1.How can I place an order for MAX6241AEPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6241AEPA 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 MAX6241AEPA reliable?
The price and inventory of MAX6241AEPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6241AEPA is usually 5 days.
3.What payment methods are accepted for MAX6241AEPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6241AEPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6241AEPA?
MAX6241AEPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6241AEPA 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 MAX6241AEPA?
For technical support, including MAX6241AEPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6241AEPA requirements.
6.How does Aetrix verify that MAX6241AEPA is sourced from the original manufacturer or authorized distributors?
All MAX6241AEPA 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 MAX6241AEPA meets industry standards.
7.What is the process for return or replacement of MAX6241AEPA?
All MAX6241AEPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6241AEPA, 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 MAX6241AEPA part is unused and in its original packaging.
Return procedure for MAX6241AEPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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