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Analog Devices Inc./Maxim Integrated MAX6225ACSA
- Part No.:
- MAX6225ACSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225ACSA.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
MAX6225ACSA from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC with 1.0ppm/°C temperature coefficient, ±0.02% initial accuracy, and 1.5µVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in metrology-grade instrumentation and calibration systems.
For engineers reviewing the MAX6225ACSA datasheet, MAX6225ACSA pinout, MAX6225ACSA application, or MAX6225ACSA equivalent, this device is selected for 16-bit+ data converters requiring ultra-stable excitation, low-drift current sources, and low-noise reference rails under varying load and line conditions.
Technical Context
The MAX6225ACSA uses buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature over 0°C to +70°C. Its output is trimmed at wafer level to 2.500V ±0.001V and supports ±15mA sourcing/sinking while maintaining <6ppm/mA load regulation.
It features dedicated NR and TRIM pins enabling external 1µF noise reduction and ±15mV (±0.6%) fine adjustment without degrading temperature stability. The device operates from 8V to 36V input and delivers stable output into any capacitive load up to 100µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±0.001V at +25°C - ensures ≤0.04% absolute error in 16-bit full-scale reference for 10V-range DACs |
| Temp Coefficient | 1.0ppm/°C max (0°C to +70°C) - contributes ≤0.125mV drift over industrial ambient range |
| Initial Accuracy | ±0.02% - guarantees ≤0.5mV absolute offset without system calibration |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - enables <18-bit ENOB in precision sigma-delta ADCs |
| Load Regulation | ≤6ppm/mA sourcing - maintains ≤9µV shift across 15mA load swing |
| Supply Current | 2.7mA typical - enables low-power operation in battery-backed calibration modules |
| Long-Term Stability | 20ppm/1000h - supports >1-year uncalibrated operation in field-deployed test equipment |
Pinout & Package
MAX6225ACSA is housed in an 8-pin SO (Small Outline) package with industry-standard footprint (S8+5, outline 21-0041), RoHS-compliant, and rated for 0°C to +70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. | Internally connected; no external connection required - must be left unconnected |
| 2 | IN | Positive power input (8V–36V); supplies internal zener and bias circuitry |
| 3 | NR | Noise reduction node - accepts 1µF capacitor to reduce wideband output noise by >20dB |
| 4 | GND | Analog ground reference - must be star-connected to minimize ground bounce in mixed-signal systems |
| 5 | TRIM | External voltage trim input - enables ±15mV adjustment via 10kΩ potentiometer without affecting tempco |
| 6 | OUT | Stable 2.500V reference output - capable of sourcing/sinking ±15mA with <10µV droop |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener architecture | Delivers lowest 1.5µVP-P flicker noise in 0.1Hz–10Hz band - critical for DC precision measurements |
| Optional NR pin filtering | 1µF capacitor reduces broadband noise without compromising transient response or stability |
| Trim-adjustable output | ±15mV range allows system-level calibration to compensate for PCB trace resistance and ADC offset |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in noisy environments |
| High PSRR | ≥85dB ripple rejection at 1kHz (CNR=1µF) - rejects switching regulator noise in compact power designs |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter Calibration |
|---|---|
|
Use Scenario: 16-bit SAR ADC front-end in portable multimeters requiring sub-10ppm total error budget. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF input and analog front-end gain-setting resistors. Use Value: 1.0ppm/°C tempco and 1.5µVP-P noise ensure <0.005% measurement repeatability across 0–50°C ambient. |
Use Scenario: Benchtop DVM reference module needing traceable 2.500V standard with annual recalibration interval. IC Role / Device Role / Timing Role: Primary reference source for auto-zero amplifier and integrator stages in dual-slope conversion. Use Value: 20ppm/1000h long-term stability minimizes calibration drift between lab maintenance cycles. |
| ATE Precision Source | Industrial Process Controller |
|
Use Scenario: Channel-per-channel reference in automated test equipment verifying 18-bit DAC linearity. IC Role / Device Role / Timing Role: Per-channel reference for programmable current source driving DUT bias networks. Use Value: ±15mA sink/source capability enables direct drive of 100Ω–1kΩ load impedances without buffer amplifiers. |
Use Scenario: Analog I/O module in PLC rack providing 4–20mA loop excitation with HART modulation. IC Role / Device Role / Timing Role: Stable excitation reference for precision current mirror and voltage-to-current converter. Use Value: Load-regulation spec of ≤6ppm/mA ensures <10µA loop current error across full 20mA span. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR441BRZ | 2.5V output, 1.5ppm/°C max, 1.75µVP-P noise, 10mA max output | Limited sink capability (no sinking) and higher quiescent current (3.75mA) | Preferred when only sourcing is needed and tighter long-term stability (15ppm/1000h) is critical |
| REF5025ID | 2.5V output, 3ppm/°C max, 3µVP-P noise, ±10mA output, integrated thermal shutdown | Higher noise and looser tempco but includes fault protection and wider supply range (4.5–18V) | Chosen for cost-sensitive industrial sensors where moderate drift tolerance exists and supply headroom is constrained |
Compared with ADR441BRZ and REF5025ID, the MAX6225ACSA offers superior temperature stability and lower noise at the expense of higher minimum supply voltage (8V), making it optimal for bench-grade and metrology applications where input rail is well-regulated.
Availability
MAX6225ACSA is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, digital voltmeters, and precision current sources requiring stable component supply with guaranteed long-term performance consistency.
Supply support for MAX6225ACSA 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 belongs to Maxim's precision voltage reference product line, engineered specifically for metrology, calibration, and high-resolution data acquisition systems demanding laboratory-grade stability and noise performance.
FAQ
What is the maximum input voltage for MAX6225ACSA?
The MAX6225ACSA supports an input voltage range of 8V to 36V. Absolute maximum rating is +40V on the IN pin, but continuous operation above 36V risks exceeding safe power dissipation limits and may degrade long-term reliability. For robust 24V system designs, the MAX6225ACSA operates within specification with margin.
Can MAX6225ACSA drive a 100µF output capacitor?
Yes, the MAX6225ACSA is explicitly characterized and guaranteed stable with output capacitance from 0µF to 100µF across all load currents. This eliminates the need for series isolation resistors and simplifies layout in systems with large local decoupling, such as automated test equipment mainframes.
Does MAX6225ACSA support both sourcing and sinking current?
Yes, the MAX6225ACSA provides symmetrical ±15mA output current capability. It can source up to +15mA into a load referenced to GND or sink up to –15mA from a load tied to a positive rail - enabling bidirectional biasing in active filter and transimpedance amplifier circuits.
How does the NR pin function in MAX6225ACSA?
The NR (Noise Reduction) pin on the MAX6225ACSA accepts an external 1µF capacitor to ground, which attenuates wideband noise above ~10Hz by >20dB. This feature preserves the ultra-low 1.5µVP-P (0.1Hz–10Hz) performance while suppressing switching noise from adjacent DC/DC converters.
Is MAX6225ACSA pin-compatible with other members of the MAX62xx family?
Yes, all MAX6225/MAX6241/MAX6250 variants share identical 8-pin SO pinout and terminal functions. The MAX6225ACSA, MAX6241ACSA+, and MAX6250ACSA+ can be substituted on the same PCB footprint when only output voltage differs - provided input voltage and load requirements remain compatible.
MAX6225ACSA 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:
- Obsolete
- Reference Type:
- Series, Buried Zener
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 2ppm/°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
MAX6225ACSA FAQ
1.How can I place an order for MAX6225ACSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225ACSA 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 MAX6225ACSA reliable?
The price and inventory of MAX6225ACSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225ACSA is usually 5 days.
3.What payment methods are accepted for MAX6225ACSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225ACSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225ACSA?
MAX6225ACSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225ACSA 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 MAX6225ACSA?
For technical support, including MAX6225ACSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225ACSA requirements.
6.How does Aetrix verify that MAX6225ACSA is sourced from the original manufacturer or authorized distributors?
All MAX6225ACSA 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 MAX6225ACSA meets industry standards.
7.What is the process for return or replacement of MAX6225ACSA?
All MAX6225ACSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225ACSA, 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 MAX6225ACSA part is unused and in its original packaging.
Return procedure for MAX6225ACSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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