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Analog Devices Inc./Maxim Integrated MAX6225BCSA+
- Part No.:
- MAX6225BCSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225BCSA+.pdf
- Description:
- IC VREF SERIES 0.12% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
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Product details
Overview
MAX6225BCSA+ from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC with 5.0ppm/°C max temperature coefficient, ±0.02% initial accuracy, and 1.5µVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in industrial instrumentation and ATE systems.
For engineers reviewing the MAX6225BCSA+ datasheet, MAX6225BCSA+ pinout, MAX6225BCSA+ application, or MAX6225BCSA+ equivalent, key selection criteria include low-drift stability over temperature, load regulation performance up to ±15mA, noise-reduction capacitor support, and SO-8 compatibility with industry-standard layout footprints.
Technical Context
The MAX6225BCSA+ employs buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature across –40°C to +85°C. Its internal architecture supports simultaneous sourcing and sinking of ±15mA while maintaining <6ppm/mA load regulation and <5ppm/V line regulation over 8V–36V input range.
It integrates dedicated NR and TRIM pins enabling external 1µF noise-filtering capacitance and ±25mV output adjustment without degrading temperature stability. The device exhibits stable transient response (<5µs settling to ±0.01%) and maintains low 20ppm/1000h long-term drift under continuous operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.003V at +25°C - ensures direct interface with 16-bit SAR and sigma-delta ADC reference inputs without scaling. |
| Tempco (max) | 5.0ppm/°C - guarantees ≤±125ppm total drift over 0°C to +70°C operating range for metrology-grade accuracy. |
| Initial Accuracy | ±0.02% - enables single-point calibration in high-accuracy digital voltmeters and process transmitters. |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - critical for sub-LSB noise floor in 16-bit data converters operating at DC or low frequencies. |
| Load Current | ±15mA - supports driving multiple op-amp buffers or DAC reference inputs without external gain stages. |
| Power Dissipation | 471mW (SO-8, TA=+70°C) - allows full-load operation in compact industrial PCB layouts with minimal thermal derating. |
| Long-Term Stability | 20ppm/1000h - ensures calibration retention over extended deployment in unattended test equipment. |
Pinout & Package
MAX6225BCSA+ is housed in an 8-pin SO (Small Outline) package with standard 150mil width, RoHS-compliant lead finish, and JEDEC MS-012AC outline. Pin 1 is marked by 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 terminals - no external connection required; floating or grounded traces cause no functional impact. |
| 2 | IN | Positive supply input (8V–36V); requires local 0.1µF bypass to GND for ripple rejection above 10kHz. |
| 3 | NR | Noise reduction node - connect 1µF capacitor to GND to reduce wideband noise; open-circuit for default operation. |
| 4 | GND | Analog ground reference - must be star-connected to system AGND plane to avoid ground-loop induced errors. |
| 5 | TRIM | Voltage trim input - accepts 10kΩ potentiometer between OUT and GND for ±25mV fine adjustment without affecting tempco. |
| 6 | OUT | Stable 2.500V reference output - capable of sourcing/sinking ±15mA with <6ppm/mA load regulation and stable into 0–100µF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest 1.5µVP-P noise in 0.1Hz–10Hz band - essential for precision weigh scales and strain-gauge signal chains. |
| External noise reduction | 1µF capacitor on NR pin reduces broadband noise by >10dB above 10Hz - eliminates need for post-regulator filtering in sensitive analog front-ends. |
| Trim-adjustable output | ±25mV range via TRIM pin - enables field calibration of system offset without hardware modification or firmware update. |
| Capacitive load immunity | Stable with 0–100µF output capacitance - simplifies layout for battery-powered DVMs requiring large hold capacitors. |
| Transient response | 5µs settling to ±0.01% - supports fast-switching multiplexed ADC architectures without reference droop artifacts. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter Calibration |
|---|---|
Use Scenario: Simultaneous sampling of 16-bit differential ADC channels in automated test equipment with shared reference rail. IC Role / Device Role / Timing Role: Primary voltage reference source providing stable 2.500V基准 for ADC conversion accuracy and channel-to-channel matching. Use Value: 5.0ppm/°C tempco and 1.5µVP-P noise ensure <0.005% total unadjusted error across environmental test chambers. | Use Scenario: Portable handheld DVM requiring traceable 2.500V reference for auto-ranging and autoranging functions. IC Role / Device Role / Timing Role: Precision reference generator with TRIM pin used for factory calibration against NIST-traceable standards. Use Value: ±0.02% initial accuracy and 20ppm/1000h long-term stability eliminate annual recalibration in field-deployed units. |
| Industrial Process Transmitter | ATE Power Supply Monitoring |
Use Scenario: 4–20mA loop-powered transmitter measuring pressure/temperature with HART communication overlay. IC Role / Device Role / Timing Role: Reference for 12-bit DAC generating loop current setpoint and for ADC measuring sensor bridge output. Use Value: ±15mA drive capability powers both DAC and sensing circuitry; low 18mW consumption extends battery life in wireless variants. | Use Scenario: Rack-mounted ATE system monitoring ±12V, ±5V, and 3.3V rails using multichannel 16-bit ADCs. IC Role / Device Role / Timing Role: Common reference for all ADC channels ensuring consistent full-scale definition across voltage domains. Use Value: Excellent line regulation (<5ppm/V) prevents measurement drift during AC line sags or surges affecting power supply outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | 2.5V, 3ppm/°C max, 1.2µVP-P, SO-8, but higher 3.5mA supply current vs. MAX6225BCSA+'s 2.7mA typical. | Optimized for ultra-low-noise battery-powered sensors; less suitable for high-current DAC buffering. | Select when sub-1.2µVP-P noise is mandatory and load current ≤5mA. |
| ADR441BRZ | 2.5V, 3ppm/°C max, 1.75µVP-P, SO-8, but only ±10mA output drive and no NR pin for external noise filtering. | Better for space-constrained medical devices; lacks adjustable trim and high-current capability. | Select when board area is constrained and ±10mA load suffices with fixed-output requirement. |
Compared with REF5025IDR and ADR441BRZ, the MAX6225BCSA+ uniquely balances 5.0ppm/°C stability, ±15mA drive, and configurable noise reduction-making it optimal for industrial ATE where robustness, adjustability, and multi-load support are prioritized over absolute minimum noise.
Availability
MAX6225BCSA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, digital voltmeter calibration, and industrial process control requiring stable component supply across extended temperature ranges and volume production cycles.
Supply support for MAX6225BCSA+ 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 precision, power, and interface applications.
The MAX6225 series belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade stability and ultra-low noise in data acquisition, test equipment, and industrial control systems.
FAQ
What is the maximum operating temperature range for the MAX6225BCSA+?
The MAX6225BCSA+ is rated for 0°C to +70°C ambient operation, as indicated by the 'C' suffix in its ordering code. It maintains guaranteed specifications-including 5.0ppm/°C max temperature coefficient and ±0.02% initial accuracy-across this full industrial temperature range. Derating begins above +70°C per the SO-8 package's 5.88mW/°C thermal resistance specification.
Does the MAX6225BCSA+ require an external capacitor on the NR pin?
No, the NR pin of the MAX6225BCSA+ may be left open for standard operation. A 1µF capacitor to ground is optional and used only when further wideband noise reduction is needed-particularly in systems sensitive to 10Hz–1kHz interference. The device remains fully functional and stable without it, and the capacitor does not affect DC accuracy or temperature drift.
Can the MAX6225BCSA+ drive a 10kΩ load while maintaining specified accuracy?
Yes, the MAX6225BCSA+ can drive a 10kΩ load (250µA at 2.5V) with negligible error: its load regulation is specified at ≤6ppm/mA, resulting in <1.5ppm output shift-well within the ±0.02% initial accuracy band. This makes it suitable for directly biasing precision op-amps, ADC references, and low-power DACs without buffer amplifiers.
How does the TRIM pin on the MAX6225BCSA+ function in practice?
The TRIM pin on the MAX6225BCSA+ accepts a voltage divider formed by a 10kΩ potentiometer between OUT and GND, allowing ±25mV adjustment of the output voltage. This provides ±1% fine-tuning capability without altering temperature coefficient or long-term stability-enabling final-system calibration after PCB assembly and thermal cycling.
Is the MAX6225BCSA+ compatible with ceramic output capacitors up to 100µF?
Yes, the MAX6225BCSA+ is explicitly characterized and guaranteed stable with output capacitance ranging from 0µF to 100µF across all load currents. This includes X7R and C0G ceramic types, enabling use in portable DVMs and battery-backed data loggers where large hold capacitors are needed for glitch-free operation during supply interruptions.
MAX6225BCSA+ 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, Buried Zener
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.12%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.5µVp-p
- Noise - 10Hz to 10kHz:
- 1.3µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6225BCSA+ FAQ
1.How can I place an order for MAX6225BCSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225BCSA+ 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 MAX6225BCSA+ reliable?
The price and inventory of MAX6225BCSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225BCSA+ is usually 5 days.
3.What payment methods are accepted for MAX6225BCSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225BCSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225BCSA+?
MAX6225BCSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225BCSA+ 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 MAX6225BCSA+?
For technical support, including MAX6225BCSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225BCSA+ requirements.
6.How does Aetrix verify that MAX6225BCSA+ is sourced from the original manufacturer or authorized distributors?
All MAX6225BCSA+ 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 MAX6225BCSA+ meets industry standards.
7.What is the process for return or replacement of MAX6225BCSA+?
All MAX6225BCSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225BCSA+, 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 MAX6225BCSA+ part is unused and in its original packaging.
Return procedure for MAX6225BCSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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