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Analog Devices Inc./Maxim Integrated MAX674CPA+
- Part No.:
- MAX674CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX674CPA+.pdf
- Description:
- IC VREF SERIES 0.15% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,234
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Product details
Overview
MAX674CPA+ from Maxim Integrated is a precision +10V voltage reference IC with ±15mV initial output tolerance (±0.15%), 12ppm/°C guaranteed temperature coefficient, and 20µVP-P low-frequency noise (0.1Hz–10Hz). It operates from 13V to 33V input, delivers up to 10mA load current, and is used in high-accuracy data-conversion systems requiring stable excitation or calibration references.
For engineers reviewing the MAX674CPA+ datasheet, MAX674CPA+ pinout, MAX674CPA+ application, or MAX674CPA+ equivalent, key selection criteria include initial accuracy, thermal drift performance, low-noise operation in precision analog front-ends, and compatibility with trim-based system calibration workflows.
Technical Context
The MAX674CPA+ implements a bandgap-derived reference core with on-die trimming for factory-set +10V output. Its trim terminal enables ±300mV adjustment without degrading temperature stability beyond +0.7ppm/°C per 100mV shift.
It features short-circuit protection to ground or VIN, load regulation of 0.001%/mA, line regulation of 0.01%/V, and turn-on settling time of 5µs to ±0.1%. Quiescent current is specified at 1.4mA max, supporting low-power precision applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +10V ±15mV (±0.15%) at TA = +25°C, IL = 0mA |
| Tempco | 12ppm/°C max (guaranteed, box method) |
| Noise (0.1Hz–10Hz) | 20µVP-P typical - critical for 16-bit+ ADC/DAC reference stability |
| Load Regulation | 0.001%/mA - ensures <10µV change per 1mA load shift |
| Quiescent Current | 750µA to 1400µA - enables low-power system biasing |
| Turn-On Settling | 5µs to ±0.1% - supports fast-sampling converter timing |
| Input Voltage Range | 13V to 33V - compatible with standard +15V supply rails |
Pinout & Package
MAX674CPA+ is supplied in an 8-pin plastic DIP (PDIP) package with 0.3-inch width and through-hole mounting. Pin 1 is VOUT, Pin 2 is TRIM, Pin 3 is GND, Pin 4 is N.C., Pin 5 is N.C., Pin 6 is VIN, Pin 7 is N.C., Pin 8 is N.C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VOUT) | Reference Output | Stable +10V source; must be decoupled locally for noise immunity |
| Pin 2 (TRIM) | Output Adjustment | Connects to external potentiometer (10kΩ typical) to fine-tune output ±300mV |
| Pin 3 (GND) | Analog Ground Reference | Return path for reference current; requires low-impedance connection to system AGND |
| Pin 6 (VIN) | Positive Supply Input | Accepts 13V–33V DC; internal regulator rejects ripple up to 0.01%/V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed +10V output | Eliminates need for external calibration resistors in production test fixtures |
| 12ppm/°C tempco (max) | Supports 16-bit accuracy over 0°C to +70°C industrial range without compensation |
| 20µVP-P low-frequency noise | Enables sub-LSB noise floor in 24-bit delta-sigma ADC reference paths |
| Short-circuit protected output | Withstands indefinite fault conditions at VOUT without latch-up or degradation |
| 0.001%/mA load regulation | Maintains reference integrity across varying DAC sink or op-amp bias currents |
Applications
| Digital Voltmeter Calibration | A/D Converter Reference |
|---|---|
Use Scenario: Benchtop digital multimeter requiring traceable 10.000V calibration point with <10ppm/year drift. IC Role / Device Role / Timing Role: Primary voltage reference for 7½-digit DVM integrator and comparator stages. Use Value: ±15mV initial error and 12ppm/°C tempco enable direct use without field recalibration over 0°C–70°C. | Use Scenario: 16-bit successive-approximation ADC in industrial process monitoring with ±0.5LSB total unadjusted error budget. IC Role / Device Role / Timing Role: High-stability analog reference for ADC full-scale determination. Use Value: 20µVP-P noise and 5µs settling ensure no conversion latency or code uncertainty from reference instability. |
| D/A Converter Excitation | Voltage Regulator Feedback |
Use Scenario: Precision bipolar DAC (e.g., ±10V output) used in automated test equipment requiring monotonic 16-bit linearity. IC Role / Device Role / Timing Role: Dual-rail reference source for DAC internal gain-setting and offset correction. Use Value: Trim-adjustable ±300mV range allows exact matching to DAC's binary-weighted ladder requirements (e.g., 10.240V). | Use Scenario: Programmable lab power supply with 0.01% output accuracy and remote sense capability. IC Role / Device Role / Timing Role: Precision feedback reference for error amplifier in adjustable linear regulator topology. Use Value: 0.001%/mA load regulation prevents output voltage shift when sense-line current varies with cable length or load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF01CP | Same pinout, ±0.3% initial accuracy (3× looser), 25ppm/°C tempco (2× higher drift) | Acceptable for 12-bit systems; insufficient for 16-bit+ metrology | Select REF01CP only if cost sensitivity outweighs accuracy requirements and board space permits minor layout revision for decoupling |
| ADR03BRZ | SO-8 package only, ±0.1% initial accuracy, 3ppm/°C tempco, 10V output, no trim pin | Superior stability but lacks adjustability; requires fixed-output design | Choose ADR03BRZ when ultimate drift performance is mandatory and system-level calibration occurs digitally or externally |
Compared with REF01CP and ADR03BRZ, the MAX674CPA+ uniquely balances factory-trimmed 0.15% accuracy, 12ppm/°C drift, and analog trim capability in PDIP-making it optimal for legacy-compatible, field-calibratable 16-bit instrumentation where pinout retention matters.
Availability
MAX674CPA+ is available at Aetrix Electronics and suitable for digital voltmeters, A/D converters, D/A converters, and precision voltage regulators requiring stable component supply across industrial temperature ranges.
Supply support for MAX674CPA+ 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 industrial, medical, and communications systems.
The MAX674 series belongs to Maxim's precision voltage reference product line, engineered specifically for high-accuracy data acquisition and calibration applications demanding tight initial tolerance and low thermal drift.
FAQ
What is the operating temperature range for MAX674CPA+?
The MAX674CPA+ is rated for operation from 0°C to +70°C. This commercial-grade temperature range is defined in the ordering information table and applies specifically to the CPA+ variant. The device maintains its guaranteed 12ppm/°C temperature coefficient and ±15mV initial output tolerance across this full range, making it suitable for indoor industrial and benchtop instrumentation environments where ambient temperature remains within specification limits. MAX674CPA+ does not support extended or military temperature grades.
Can MAX674CPA+ be used as a drop-in replacement for REF01CP?
Yes, MAX674CPA+ is pin-for-pin compatible with REF01CP per the datasheet's "Features" section, sharing identical 8-pin DIP pinout and terminal functions. However, MAX674CPA+ offers tighter specifications: ±0.15% vs. ±0.3% initial accuracy and 12ppm/°C vs. 25ppm/°C temperature coefficient. No PCB changes are required, but users should verify that the improved performance aligns with system-level error budgets and that the trim terminal (Pin 2) is either properly terminated or left open per design intent.
What is the maximum load current supported by MAX674CPA+?
MAX674CPA+ supports a maximum load current of 10mA under typical conditions (VIN = 15V, TA = +25°C), as confirmed by the "Maximum Load Current vs. Input Voltage" graph and electrical characteristics table. At higher temperatures or lower input voltages, the safe load current decreases - e.g., to ~6mA at +70°C and VIN = 15V per the "Maximum Load Current vs. Temperature" curve. Exceeding these limits risks output regulation loss or thermal shutdown, though short-circuit protection prevents permanent damage.
Does MAX674CPA+ require external capacitors for stability?
MAX674CPA+ does not require external output capacitors for basic stability, as stated in the Typical Operating Circuit and Absolute Maximum Ratings. However, a 0.1µF ceramic capacitor placed directly at the VOUT pin (Pin 1) to GND (Pin 3) is strongly recommended to suppress high-frequency noise and improve transient response during load switching. Input bypassing with a 1µF tantalum or ceramic capacitor at VIN (Pin 6) further enhances ripple rejection, especially when sourced from noisy switch-mode supplies.
How is the trim function implemented on MAX674CPA+?
The trim function on MAX674CPA+ uses Pin 2 (TRIM) to adjust the output voltage over a ±300mV range around 10V (i.e., 9.7V to 10.3V), typically with a 10kΩ potentiometer connected between VOUT and GND, wiper to TRIM. This analog adjustment allows system-level calibration without modifying firmware or hardware gain stages. Per the datasheet, each 100mV of output shift increases temperature coefficient by only ~0.7ppm/°C, preserving most of the device's thermal stability even after trimming.
MAX674CPA+ 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
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.15%
- Temperature Coefficient:
- 12ppm/°C
- Noise - 0.1Hz to 10Hz:
- 20µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 13V ~ 33V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX674CPA+ FAQ
1.How can I place an order for MAX674CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX674CPA+ 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 MAX674CPA+ reliable?
The price and inventory of MAX674CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX674CPA+ is usually 5 days.
3.What payment methods are accepted for MAX674CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX674CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX674CPA+?
MAX674CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX674CPA+ 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 MAX674CPA+?
For technical support, including MAX674CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX674CPA+ requirements.
6.How does Aetrix verify that MAX674CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX674CPA+ 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 MAX674CPA+ meets industry standards.
7.What is the process for return or replacement of MAX674CPA+?
All MAX674CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX674CPA+, 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 MAX674CPA+ part is unused and in its original packaging.
Return procedure for MAX674CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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