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Analog Devices Inc./Maxim Integrated MAX6225AESA+T
- Part No.:
- MAX6225AESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225AESA+T.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,734
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Product details
Overview
MAX6225AESA+T 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. It delivers ±15mA source/sink capability, operates from 8V to 36V input, and targets high-resolution data converters requiring stable, low-noise analog references.
For engineers reviewing the MAX6225AESA+T datasheet, MAX6225AESA+T pinout, MAX6225AESA+T application, or MAX6225AESA+T equivalent, key selection criteria include its -40°C to +85°C industrial temperature range, 8-pin SO package, optional external trim and noise reduction, and guaranteed load regulation up to ±15mA in high-accuracy measurement systems.
Technical Context
The MAX6225AESA+T employs buried-zener core technology for ultra-low noise and exceptional long-term stability (20ppm/1000h). Its internal temperature compensation yields near-zero curvature over -40°C to +85°C, enabling laboratory-grade accuracy without ovenized or heated reference architectures.
It supports external trimming via the TRIM pin (±15mV adjustment range) and wideband noise reduction via the NR pin (1µF capacitor), both implemented without degrading temperature coefficient or hysteresis performance. Output impedance remains below 1Ω up to 10kHz, ensuring robust transient response under dynamic load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1mV at +25°C - enables direct interface with 16-bit ADCs requiring sub-LSB reference error |
| Temp Coefficient | 5.0ppm/°C max (E grade) - ensures ≤±0.3mV drift over full -40°C to +85°C range |
| Initial Accuracy | ±0.02% (±0.5mV) - eliminates need for system-level calibration in precision instrumentation |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - critical for low-frequency measurements like digital voltmeters and strain gauge bridges |
| Load Regulation | ≤7ppm/mA sourcing/sinking - maintains stability across full ±15mA output current swing |
| Supply Current | 2.7mA typical - enables low-power operation while sustaining high drive strength |
| Long-Term Stability | 20ppm/1000h - guarantees minimal drift during extended deployment in process control systems |
Pinout & Package
MAX6225AESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free, with standard JEDEC MS-012AC footprint (S8+5 outline, land pattern 90-0096).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No connection required; pins are internally bonded and must remain unconnected on PCB |
| 2 | IN | Positive power supply input (8V–36V); requires local bypass capacitor for ripple rejection |
| 3 | NR | Noise reduction terminal; 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 fine adjustment without affecting tempco or stability |
| 6 | OUT | 2.500V precision reference output; capable of sourcing/sinking ±15mA with <1Ω AC impedance up to 10kHz |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers 1.5µVP-P (0.1Hz–10Hz) noise - lowest among non-heated 2.5V references for metrology-grade applications |
| External trim & NR | Independent TRIM and NR pins allow simultaneous accuracy optimization and broadband noise suppression without trade-offs |
| Capacitive load stability | Stable with 0µF to 100µF output capacitance - simplifies layout and eliminates need for isolation resistors |
| Transient response | 5µs turn-on settling to ±0.01%; <500µV undershoot on ±10mA load steps - preserves integrity in fast-sampling DAQ systems |
| Industrial temp range | -40°C to +85°C operation with 5.0ppm/°C max tempco - qualified for factory automation and outdoor instrumentation |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters (DVMs) |
|---|---|
Use Scenario: 16-bit SAR ADC front-end in portable calibration equipment requiring traceable voltage standards. IC Role / Device Role / Timing Role: Primary 2.500V reference for ADC conversion, providing absolute voltage scale and LSB stability. Use Value: ±0.02% initial accuracy and 20ppm/1000h long-term drift ensure NIST-traceable measurements without recalibration every 3 months. | Use Scenario: 6½-digit bench DVM measuring DC voltages from 100mV to 10V with auto-ranging. IC Role / Device Role / Timing Role: Precision reference for internal DAC-based null detection and ratio-metric scaling circuits. Use Value: 1.5µVP-P low-frequency noise directly limits resolution floor, enabling true 20ppm measurement repeatability. |
| Industrial Process Controllers | ATE Reference Subsystem |
Use Scenario: Analog I/O module in PLC rack converting 4–20mA sensor signals with 0.1% total uncertainty budget. IC Role / Device Role / Timing Role: Stable excitation and reference source for precision current-loop transmitter and receiver stages. Use Value: ±15mA drive capability powers external 2-wire sensors; 5.0ppm/°C tempco meets ISA-S71.04 Class G2 environmental requirements. | Use Scenario: Reference rail generation in automated test equipment validating 12–16-bit DAC/ADC devices under production burn-in. IC Role / Device Role / Timing Role: Master reference for stimulus generation and measurement comparison against DUT outputs. Use Value: Guaranteed line/load regulation and low output impedance ensure <0.005% test uncertainty across varying channel counts and fixture parasitics. |
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 noise, but only ±10mA output drive and higher 3.5mA supply current | Limited sink capability reduces suitability for active filter biasing or dual-supply DAC references | Prefer when ultra-low tempco outweighs drive strength needs; verify layout compatibility with SOIC-8 footprint |
| ADR441BRZ | 2.5V, 3ppm/°C max, 1.75µVP-P noise, ±10mA drive, but requires minimum 4.5V input and lacks NR pin | No noise-reduction pin limits flexibility in EMI-sensitive environments like RF test fixtures | Choose when lower input voltage operation is mandatory; confirm absence of NR does not compromise system SNR |
Compared with REF5025IDR and ADR441BRZ, the MAX6225AESA+T offers superior ±15mA bidirectional drive and dedicated NR functionality-critical for high-dynamic-range, multi-channel test systems where reference loading and board-level noise coupling must be actively managed.
Availability
MAX6225AESA+T is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, precision current sources, and industrial process control systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6225AESA+T 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 demanding industrial, automotive, and communications applications.
The MAX6225 series belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade instrumentation, high-bit-depth data converters, and systems where long-term stability and ultra-low noise are non-negotiable design requirements.
FAQ
What is the maximum operating temperature range for the MAX6225AESA+T?
The MAX6225AESA+T is rated for operation from -40°C to +85°C, matching the "E" grade specification in the ordering table. This industrial temperature range is validated across all electrical parameters including tempco (5.0ppm/°C max), initial accuracy (±0.02%), and long-term stability (20ppm/1000h), making it suitable for factory-floor and outdoor deployed instrumentation where ambient extremes occur.
Can the MAX6225AESA+T drive a 10kΩ load while maintaining specified accuracy?
Yes - the MAX6225AESA+T can drive a 10kΩ load (250µA at 2.5V) with negligible impact on accuracy. Its load regulation is specified at ≤7ppm/mA, meaning a 0.25mV shift occurs over full ±15mA, far less than the ±0.5mV initial tolerance. The device's low output impedance (<1Ω up to 10kHz) ensures minimal voltage droop even under reactive or dynamically varying loads.
Does the MAX6225AESA+T require an external capacitor on the NR pin for basic operation?
No - the NR pin of the MAX6225AESA+T is optional and may be left open for standard operation. A 1µF capacitor is recommended only when wideband noise reduction is required; adding it improves 10Hz–1kHz noise by ~20dB but has no effect on 0.1Hz–10Hz flicker noise. Omitting the NR capacitor does not affect output voltage accuracy, tempco, or stability.
How does the TRIM pin function on the MAX6225AESA+T, and what is its adjustment range?
The TRIM pin on the MAX6225AESA+T accepts an external voltage divider to adjust output voltage by ±15mV (±0.6%) around 2.500V. As shown in Figure 1 of the datasheet, a 10kΩ potentiometer between OUT and GND, with wiper connected to TRIM, provides linear, temperature-stable trimming. This adjustment does not degrade the 5.0ppm/°C tempco or long-term stability specifications.
Is the MAX6225AESA+T compatible with ceramic output capacitors up to 100µF?
Yes - the MAX6225AESA+T is explicitly characterized and guaranteed stable with output capacitance ranging from 0µF to 100µF, regardless of load current. This eliminates the need for series isolation resistors or ferrite beads often required with other references, simplifying PCB layout and improving transient response in systems with large decoupling banks or remote sensing paths.
MAX6225AESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- ±0.04%
- Temperature Coefficient:
- 3ppm/°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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6225AESA+T FAQ
1.How can I place an order for MAX6225AESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225AESA+T 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 MAX6225AESA+T reliable?
The price and inventory of MAX6225AESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225AESA+T is usually 5 days.
3.What payment methods are accepted for MAX6225AESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225AESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225AESA+T?
MAX6225AESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225AESA+T 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 MAX6225AESA+T?
For technical support, including MAX6225AESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225AESA+T requirements.
6.How does Aetrix verify that MAX6225AESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6225AESA+T 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 MAX6225AESA+T meets industry standards.
7.What is the process for return or replacement of MAX6225AESA+T?
All MAX6225AESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225AESA+T, 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 MAX6225AESA+T part is unused and in its original packaging.
Return procedure for MAX6225AESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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