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Analog Devices Inc./Maxim Integrated MAX6350CPA+
- Part No.:
- MAX6350CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6350CPA+.pdf
- Description:
- IC VREF SERIES 0.02% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,645
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Product details
Overview
MAX6350CPA+ from Maxim Integrated is a precision 5.000V buried-zener voltage reference IC with ±0.02% initial accuracy, 0.5ppm/°C typical temperature coefficient, and 1.0ppm/°C maximum tempco over 0°C to +70°C. It delivers ±15mA output current, supports 8V–36V input, and is optimized for high-resolution ADC/DAC biasing in industrial instrumentation and ATE systems.
For engineers reviewing the MAX6350CPA+ datasheet, MAX6350CPA+ pinout, MAX6350CPA+ application, or MAX6350CPA+ equivalent, key selection criteria include its 3.0mA supply current, ±30mV trim range, 10µs turn-on settling time to ±0.01%, and compatibility with capacitive loads up to 100µF without instability.
Technical Context
The MAX6350CPA+ uses buried-zener core technology to achieve ultra-low 1.5µVp-p (0.1Hz–10Hz) noise and 3.0µVRMS wideband noise, enabling 16-bit data-conversion accuracy. Its internal temperature-compensation scheme yields near-zero curvature across temperature, verified by ±20ppm hysteresis at +25°C.
It features dedicated NR and TRIM pins for external noise reduction (via 1µF capacitor) and ±1% output adjustment (±30mV), respectively, while maintaining full spec compliance - including guaranteed load regulation of 7ppm/mA and line regulation of 10ppm/V - under sourcing/sinking conditions up to ±15mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1mV (ensures 16-bit DAC/ADC full-scale reference stability) |
| Tempco (max) | 1.0ppm/°C (guaranteed over 0°C to +70°C; enables <±50ppm drift in industrial ambient) |
| Initial Accuracy | ±0.02% (±1mV absolute error; eliminates system calibration for mid-accuracy applications) |
| Noise (0.1–10Hz) | 1.5µVp-p (supports sub-LSB noise floor in 16-bit 100ksps converters) |
| Supply Current | 3.0mA (enables low-power operation in battery-backed precision sensors) |
| Load Regulation | 7ppm/mA (maintains <±105ppm error across full ±15mA output swing) |
| Turn-On Settling | 10µs to ±0.01% (allows fast power-cycle recovery in automated test equipment) |
Pinout & Package
MAX6350CPA+ is housed in an 8-pin plastic DIP package (0.300" width), RoHS-compliant and rated for 0°C to +70°C operation. Pin 1, 7, and 8 are internally connected and must remain unconnected on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8V–36V unregulated input; bypass capacitor recommended for ripple rejection |
| GND (Pin 4) | Reference ground | Low-impedance return path; must be star-connected to minimize ground bounce in mixed-signal systems |
| NR (Pin 3) | Noise reduction node | Connects to 1µF capacitor to reduce wideband noise; open-circuit if unused |
| OUT (Pin 6) | Precision 5V output | Delivers ±15mA; stable with 0–100µF capacitive loads; drives ADC REF inputs directly |
| TRIM (Pin 5) | External voltage trim | Accepts 10kΩ potentiometer for ±30mV (±0.6%) fine adjustment without affecting tempco |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 1.5µVp-p low-frequency noise - critical for metrology-grade measurements |
| Trim-adjustable output | ±30mV range via external potentiometer preserves ±0.02% initial accuracy after calibration |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in noisy environments |
| High transient response | 500µV overshoot during ±10mA load steps ensures minimal reference droop in dynamic converter sequencing |
| Long-term stability | 30ppm/1000hr drift - reduces recalibration frequency in deployed industrial control hardware |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters (DVM) |
|---|---|
Use Scenario: 16-bit SAR ADC in portable environmental sensor node sampling thermocouple and RTD signals. IC Role / Device Role / Timing Role: Primary 5V reference for ADC VREF and DAC output buffer biasing. Use Value: 0.5ppm/°C tempco and 1.5µVp-p noise ensure <±0.5LSB total error across -20°C to +60°C operating range. | Use Scenario: Benchtop 6½-digit DVM requiring traceable, low-drift reference for autoranging front-end. IC Role / Device Role / Timing Role: Master reference source for dual-slope integrator and auto-zero amplifier stages. Use Value: ±0.02% initial accuracy and 30ppm/1000hr long-term stability eliminate daily recalibration. |
| ATE Equipment | Precision Current Sources |
Use Scenario: Modular PXI card generating programmable 5V reference for channel calibration in semiconductor test systems. IC Role / Device Role / Timing Role: Stable excitation source for Kelvin sensing and parametric measurement units. Use Value: 10µs turn-on settling and ±15mA drive capability enable <100ms per-channel calibration cycles. | Use Scenario: 4–20mA transmitter with HART interface requiring precise 5V rail for loop-powered signal conditioning. IC Role / Device Role / Timing Role: Regulated 5V supply for op-amp I/V conversion and microcontroller analog peripherals. Use Value: Load regulation of 7ppm/mA ensures <±105ppm output error across full 20mA loop current swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ | 5.0V output, ±0.02% initial accuracy, but 3ppm/°C max tempco (vs. 1ppm/°C); higher 3.8µVp-p noise | Suitable for less demanding 14-bit systems; requires tighter thermal management | Select when lower cost outweighs tempco/noise requirements; verify layout thermal isolation |
| REF5050AIDR | 5.0V output, ±0.05% initial accuracy, 3ppm/°C max tempco, 4.5µVp-p noise; SO-8 package only | Targeted at cost-sensitive industrial PLC modules where 16-bit resolution is not required | Choose for volume production where ±0.05% accuracy suffices and SO-8 footprint is preferred |
Compared with ADR4550BRZ and REF5050AIDR, the MAX6350CPA+ provides superior temperature stability (1ppm/°C vs. ≥3ppm/°C) and lower noise (1.5µVp-p vs. ≥3.8µVp-p), making it the optimal choice for metrology, high-speed data acquisition, and calibration-critical ATE platforms.
Availability
MAX6350CPA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, digital voltmeters, and automated test equipment requiring stable component supply across extended product lifecycles.
Supply support for MAX6350CPA+ 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, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX63xx family was engineered specifically for metrology-grade voltage references - prioritizing ultra-low noise, sub-ppm/°C stability, and robust load/transient performance in precision measurement hardware.
FAQ
What is the maximum input voltage rating for the MAX6350CPA+?
The MAX6350CPA+ has an absolute maximum input voltage (IN pin) of 40V, but its specified operating range is 8V to 36V. Operation above 36V risks exceeding safe power dissipation limits and may degrade long-term stability. For reliable 0°C to +70°C performance, maintain VIN within 8–36V and use appropriate input filtering per the datasheet's bypassing recommendations.
Does the MAX6350CPA+ require an external capacitor on the NR pin to meet its noise specification?
No - the MAX6350CPA+ achieves its guaranteed 1.5µVp-p (0.1Hz–10Hz) noise without any external NR capacitor. Adding a 1µF capacitor to the NR pin further reduces wideband noise, but the base specification is met with NR open. The NR pin is optional and should be left unconnected unless additional noise suppression is needed in sensitive applications.
Can the MAX6350CPA+ drive a 10µF output capacitor without oscillation?
Yes - the MAX6350CPA+ is explicitly characterized and guaranteed stable with output capacitive loads from 0µF to 100µF across all load currents (±15mA). This eliminates the need for series isolation resistors in applications like ADC reference buffering or precision current-source filtering, simplifying layout and improving transient response.
What is the purpose of the TRIM pin on the MAX6350CPA+, and how much adjustment does it provide?
The TRIM pin on the MAX6350CPA+ allows external fine-tuning of the output voltage using a 10kΩ potentiometer between OUT and GND, with the wiper connected to TRIM. It provides a ±30mV (±0.6%) adjustment range around the nominal 5.000V output, enabling system-level calibration without degrading the device's ±0.02% initial accuracy or 1.0ppm/°C tempco specification.
Is the MAX6350CPA+ pin-compatible with other members of the MAX63xx family, such as the MAX6325CPA+ or MAX6341CPA+?
Yes - the MAX6350CPA+, MAX6325CPA+, and MAX6341CPA+ share identical 8-pin DIP pinouts, electrical interfaces, and functional pin assignments (IN, GND, NR, TRIM, OUT). Only the output voltage differs: 2.5V, 4.096V, and 5.000V respectively. This allows direct board-level substitution in existing designs when scaling reference voltage requirements, provided input/output filtering and load conditions remain compatible.
MAX6350CPA+ 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 1ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- 2.5µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3.3mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6350CPA+ FAQ
1.How can I place an order for MAX6350CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6350CPA+ 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 MAX6350CPA+ reliable?
The price and inventory of MAX6350CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6350CPA+ is usually 5 days.
3.What payment methods are accepted for MAX6350CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6350CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6350CPA+?
MAX6350CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6350CPA+ 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 MAX6350CPA+?
For technical support, including MAX6350CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6350CPA+ requirements.
6.How does Aetrix verify that MAX6350CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX6350CPA+ 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 MAX6350CPA+ meets industry standards.
7.What is the process for return or replacement of MAX6350CPA+?
All MAX6350CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6350CPA+, 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 MAX6350CPA+ part is unused and in its original packaging.
Return procedure for MAX6350CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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