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Analog Devices Inc./Maxim Integrated MAX6225AESA+
- Part No.:
- MAX6225AESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225AESA+.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:920
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Product details
Overview
MAX6225AESA+ from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC designed for high-resolution analog signal chains. It delivers ±0.02% initial accuracy, 5.0ppm/°C max temperature coefficient over –40°C to +85°C, 1.5µVP-P (0.1Hz–10Hz) output noise, and ±15mA source/sink capability in an 8-pin SO package. It serves as the primary reference in 16-bit ADC/DAC systems requiring laboratory-grade stability.
For engineers reviewing the MAX6225AESA+ datasheet, MAX6225AESA+ pinout, MAX6225AESA+ application, or MAX6225AESA+ equivalent, key selection criteria include its guaranteed 5.0ppm/°C tempco at extended temperature, low-noise performance under capacitive loads, trim-adjustable output, and compatibility with high-accuracy industrial instrumentation and ATE calibration circuits.
Technical Context
The MAX6225AESA+ employs buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature across –40°C to +85°C. Its output is stabilized against line variations (≤7ppm/V over 10V–36V), load shifts (≤7ppm/mA sourcing), and long-term drift (20ppm/1000h).
It supports external noise reduction via NR pin capacitor (1µF typical), optional output trimming (±25mV range), and operates stably with 0–100µF output capacitance - enabling direct integration into sensitive data-acquisition front-ends without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1mV at +25°C - enables sub-LSB error in 16-bit 2.5V full-scale converters. |
| Tempco (max) | 5.0ppm/°C over –40°C to +85°C - ensures ≤±0.5mV total drift across industrial temperature range. |
| Initial Accuracy | ±0.02% (±0.5mV) - eliminates need for system-level calibration in precision metering. |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - preserves SNR in low-frequency, high-dynamic-range measurements. |
| Load Drive | ±15mA source/sink - directly drives ADC reference inputs, op-amp buffers, or DAC bias networks. |
| Power Dissipation | 18mW typical - allows operation in thermally constrained PCB layouts without derating. |
| Long-Term Stability | 20ppm/1000h - guarantees <±0.05% output shift over first year of field use. |
Pinout & Package
MAX6225AESA+ is housed in an 8-pin SO (Small Outline) package per JEDEC MS-012, RoHS-compliant, with 1.27mm pitch and exposed pad not present. Pin 1 is marked by bevelled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No external connection; electrically tied internally - must remain unconnected on PCB. |
| 2 | IN | Positive supply input (8V–36V); requires local 2.2µF bypass to GND for ripple rejection. |
| 3 | NR | Noise reduction node; connect 1µF capacitor to GND to reduce wideband noise by >20dB above 10Hz. |
| 4 | GND | Analog ground reference; must tie to clean, low-impedance system ground plane. |
| 5 | TRIM | External voltage adjust input; accepts 0–2.5V for ±25mV output tuning via 10kΩ potentiometer. |
| 6 | OUT | Stable 2.500V reference output; capable of driving 0–100µF capacitive loads without oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 1.5µVP-P ultra-low noise and 20ppm/1000h long-term stability - critical for metrology-grade references. |
| Trim-adjustable output | ±25mV tuning range via TRIM pin - allows board-level calibration to compensate for PCB trace resistance and layout tolerances. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in noisy environments or fast-settling systems. |
| High PSRR | ≥60dB ripple rejection up to 10kHz (with NR cap) - maintains reference integrity when powered from switched supplies. |
| Fast turn-on settling | 5µs to ±0.01% final value - supports burst-mode or low-duty-cycle precision measurement systems. |
Applications
| High-Resolution Data Acquisition | Digital Voltmeter (DVM) |
|---|---|
Use Scenario: 16-bit SAR ADC sampling sensor signals in environmental monitoring stations with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute scaling for ADC transfer function; referenced to GND with no floating nodes. Use Value: 5.0ppm/°C tempco and 20ppm/1000h stability ensure <±0.005% full-scale error over 5-year deployment without recalibration. | Use Scenario: Portable handheld DVM measuring DC voltages from µV to 10V with 5½-digit resolution. IC Role / Device Role / Timing Role: Precision 2.500V reference for dual-slope integrator and auto-zero amplifier stages. Use Value: 1.5µVP-P low-frequency noise prevents digitization uncertainty in sub-microvolt measurements. |
| ATE Calibration Subsystem | Precision Current Source |
Use Scenario: Automated test equipment calibrating multimeters and source-measure units using internal 2.5V reference ladder. IC Role / Device Role / Timing Role: Master reference for programmable gain instrumentation amplifiers and DAC-based voltage sources. Use Value: ±15mA drive capability enables direct sourcing of reference voltage to multiple parallel channels without buffer op-amps. | Use Scenario: Industrial 4–20mA transmitter with HART modulation requiring stable current setpoint derived from voltage reference. IC Role / Device Role / Timing Role: Setpoint generator for Howland current source; OUT pin connected to op-amp non-inverting input. Use Value: Load regulation ≤7ppm/mA ensures <±0.03% current error across full 20mA span despite sensor cable impedance variation. |
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 and no TRIM/NR pins. | Lower noise and tempco, but lacks external adjustment - unsuitable where board-level calibration is required. | Select REF5025IDR only if absolute lowest drift is prioritized over field-trim capability and power budget allows +1.8mA overhead. |
| ADR441BRZ | 2.5V, 3ppm/°C max, 1.75µVP-P, SO-8, includes TRIM but no NR pin; requires external RC filter for noise reduction. | Similar trim flexibility, but adds design complexity for noise control and consumes more PCB area. | Choose ADR441BRZ when legacy layout re-use demands identical pin count and trim support, accepting added filtering components. |
Compared with REF5025IDR and ADR441BRZ, MAX6225AESA+ uniquely integrates both TRIM and NR functions in SO-8 while maintaining 5.0ppm/°C industrial-tempco guarantee - making it optimal for cost-sensitive, space-constrained, and field-calibratable precision instruments.
Availability
MAX6225AESA+ is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, digital voltmeter design, and ATE calibration subsystems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX6225AESA+ 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 16-bit+ data-conversion systems.
FAQ
What is the guaranteed temperature coefficient specification for MAX6225AESA+?
The MAX6225AESA+ has a maximum temperature coefficient of 5.0ppm/°C over the –40°C to +85°C operating range, as specified in the Electrical Characteristics table for the "E" grade (MAX6225AE_A). This value is measured using the box method and represents the worst-case drift across the full temperature span.
Can MAX6225AESA+ drive a 10µF output capacitor without instability?
Yes, MAX6225AESA+ is explicitly characterized and guaranteed stable with output capacitance from 0µF to 100µF across all load currents and temperatures. No series isolation resistor is needed - the device's internal compensation ensures phase margin remains sufficient even with large ceramic or tantalum capacitors directly at the OUT pin.
Does MAX6225AESA+ support external voltage trimming, and what is the adjustment range?
Yes, MAX6225AESA+ supports external trimming via the TRIM pin. With a 10kΩ potentiometer between OUT and GND, the output can be adjusted by ±25mV (±1.0%) at +25°C. The trim function does not degrade temperature stability or long-term drift performance.
What is the maximum continuous output current capability of MAX6225AESA+?
MAX6225AESA+ provides ±15mA continuous output current - meaning it can source up to +15mA or sink up to –15mA while maintaining output voltage regulation within datasheet limits. This is validated across the full –40°C to +85°C temperature range and 8V–36V input voltage.
Is MAX6225AESA+ RoHS-compliant and lead-free?
Yes, MAX6225AESA+ carries the "+" suffix per Maxim's ordering nomenclature, indicating it is a lead(Pb)-free and RoHS-compliant package. The 8-pin SO package meets EU RoHS Directive 2011/65/EU and subsequent amendments, with homogeneous material analysis confirming compliance.
MAX6225AESA+ 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:
- ±0.04%
- 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+ FAQ
1.How can I place an order for MAX6225AESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225AESA+ 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+ reliable?
The price and inventory of MAX6225AESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225AESA+ is usually 5 days.
3.What payment methods are accepted for MAX6225AESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225AESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225AESA+?
MAX6225AESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225AESA+ 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+?
For technical support, including MAX6225AESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225AESA+ requirements.
6.How does Aetrix verify that MAX6225AESA+ is sourced from the original manufacturer or authorized distributors?
All MAX6225AESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6225AESA+?
All MAX6225AESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225AESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX6225AESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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