My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6225ACPA
- Part No.:
- MAX6225ACPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6225ACPA.pdf
- Description:
- IC VREF SERIES 0.04% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,756
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6225ACPA from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC with 2.0ppm/°C max temperature coefficient, ±0.02% initial accuracy, and 1.5µVP-P (0.1Hz–10Hz) output noise. It delivers ±15mA sourcing/sinking capability and operates from 8V to 36V input, serving as the primary reference in high-resolution ADC/DAC signal chains.
For engineers reviewing the MAX6225ACPA datasheet, MAX6225ACPA pinout, MAX6225ACPA application, or MAX6225ACPA equivalent, key selection criteria include low-drift performance over 0°C to +70°C, noise-reduction capacitor support on NR pin, trim-adjustable output, and compatibility with capacitive loads up to 100µF without instability.
Technical Context
The MAX6225ACPA uses buried-zener core technology with on-chip temperature compensation to achieve near-zero thermal curvature across its 0°C to +70°C operating range. Its output remains stable under load transients (settling to ±0.01% in 5µs) and maintains low 18mW power consumption at 2.5V output.
It supports external trimming via a 10kΩ potentiometer between OUT and GND with tap to TRIM pin (±15mV adjustment), and optional 1µF noise-reduction capacitor on NR pin reduces wideband noise without degrading transient response. Output impedance stays below 1Ω up to 10kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1mV at +25°C - ensures direct compatibility with 2.5V ADC full-scale ranges |
| Tempco (max) | 2.0ppm/°C over 0°C to +70°C - enables ≤5ppm total drift across industrial ambient range |
| Initial Accuracy | ±0.02% - guarantees ≤0.5mV absolute error before calibration |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - preserves SNR in 16-bit+ data converters |
| Load Current | ±15mA sourcing/sinking - drives DAC buffers, op-amp references, and current sources directly |
| Line Regulation | 2ppm/V (10V–36V) - minimizes supply ripple impact on reference stability |
| Long-Term Stability | 20ppm/1000h - supports metrology-grade calibration intervals |
Pinout & Package
MAX6225ACPA is housed in an 8-pin plastic DIP package (0.300" width), RoHS-compliant with lead-free finish (+ suffix). The package supports through-hole mounting and provides standard industry footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. | Internally connected - no external connection; floating or grounded has no effect |
| 2 | IN | Positive supply input (8V–36V); requires local bypass capacitor for ripple rejection |
| 3 | NR | Noise reduction node - accepts 1µF capacitor to ground for wideband noise suppression |
| 4 | GND | Analog ground reference - must be star-connected to minimize ground bounce |
| 5 | TRIM | External voltage adjust input - enables ±15mV output tuning via 10kΩ potentiometer |
| 6 | OUT | Precision 2.500V reference output - stable into 0–100µF capacitive loads |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables ultra-low 1.5µVP-P noise and <2ppm/°C drift without oven control |
| Trim-adjustable output | ±15mV range via external potentiometer - allows system-level calibration without firmware changes |
| Noise-reduction terminal (NR) | 1µF capacitor reduces broadband noise while preserving 5µs turn-on settling |
| Capacitive-load immunity | Stable with 0–100µF output capacitance - eliminates need for isolation resistors in filter networks |
| High PSRR | ≥60dB ripple rejection up to 10kHz - maintains accuracy even with noisy DC-DC supplies |
Applications
| High-Resolution Data Acquisition | Digital Voltmeters (DVMs) |
|---|---|
Use Scenario: 16-bit SAR ADC sampling sensor signals in automated test equipment. IC Role / Device Role / Timing Role: Primary voltage reference defining full-scale input range and LSB weight. Use Value: 2.0ppm/°C tempco and 1.5µVP-P noise ensure <0.5LSB integral nonlinearity error across temperature. | Use Scenario: Portable handheld DVM requiring factory-calibrated 3½-digit accuracy. IC Role / Device Role / Timing Role: Stable 2.500V reference for dual-slope integrator and ADC reference ladder. Use Value: ±0.02% initial accuracy and 20ppm/1000h long-term stability reduce recalibration frequency to once per year. |
| Precision Current Sources | ATE Equipment Reference Subsystem |
Use Scenario: Programmable current source for semiconductor parametric testing (e.g., IDS vs. VGS). IC Role / Device Role / Timing Role: Setpoint reference for op-amp-controlled MOSFET current mirror. Use Value: ±15mA sourcing/sinking capability enables direct drive of sense resistors without buffer amplifiers. | Use Scenario: Multi-channel ATE system requiring synchronized, low-drift references for parallel DUT testing. IC Role / Device Role / Timing Role: Master reference distributed to 8-channel DACs and comparator thresholds. Use Value: Industry-standard pinout and SO/DIP package options simplify board layout reuse across test platforms. |
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, 3.3–18V supply | Lower noise but higher tempco; requires lower input voltage | Prefer when supply is <12V and sub-1.2µV noise is critical; not suitable for 24V industrial rails |
| ADR441BRZ | 2.5V, 3ppm/°C max, 1.75µVP-P, SO-8, 3.3–18V supply | Slightly higher noise and tempco; includes enable pin | Choose when power gating is required; lacks NR pin for noise optimization |
Compared with REF5025IDR and ADR441BRZ, the MAX6225ACPA offers superior temperature stability (2.0ppm/°C vs. ≥3ppm/°C) and wider 8–36V input operation - making it optimal for industrial systems with unregulated 24V rails and tight drift budgets.
Availability
MAX6225ACPA is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, precision current sourcing, and digital voltmeter designs requiring stable component supply across extended production lifecycles.
Supply support for MAX6225ACPA 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 MAX6225ACPA belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade stability and ultra-low noise in 16-bit+ data acquisition systems.
FAQ
What is the maximum operating temperature range for the MAX6225ACPA?
The MAX6225ACPA is rated for operation from 0°C to +70°C, as indicated by the 'C' grade in its part number. This commercial temperature range is validated across all electrical specifications including tempco (2.0ppm/°C max), initial accuracy (±0.02%), and load regulation. Operation outside this range may result in parameter degradation beyond guaranteed limits.
Does the MAX6225ACPA require an external capacitor on the NR pin?
No, the NR pin on the MAX6225ACPA is optional: leaving it open provides standard performance, while connecting a 1µF capacitor to ground reduces wideband noise. The datasheet confirms noise improvement with 1µF, and larger values yield diminishing returns. The MAX6225ACPA remains fully functional and stable without any NR capacitor.
Can the MAX6225ACPA drive a 10µF output capacitor directly?
Yes, the MAX6225ACPA is explicitly characterized and guaranteed stable with output capacitance from 0µF to 100µF across all load currents (±15mA). This eliminates the need for series isolation resistors in filtering or decoupling networks - a key advantage over many competing references that oscillate or exhibit peaking with >1µF loads.
What is the purpose of pins 1, 7, and 8 on the MAX6225ACPA?
Pins 1, 7, and 8 on the MAX6225ACPA are internally connected (I.C.) and serve no external function. The datasheet states "Do not use" - these pins must remain unconnected (floating) or tied to ground with no electrical impact. They are not grounds, supplies, or feedback nodes; routing traces to them provides no benefit and risks unintended coupling.
How does the TRIM pin on the MAX6225ACPA affect output voltage accuracy?
The TRIM pin on the MAX6225ACPA enables ±15mV (±0.6%) adjustment of the 2.500V output using a 10kΩ potentiometer between OUT and GND. This external trimming does not degrade the device's specified temperature coefficient or long-term stability - it shifts the entire transfer curve linearly while preserving drift performance, enabling system-level calibration without sacrificing precision.
MAX6225ACPA 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, 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6225ACPA FAQ
1.How can I place an order for MAX6225ACPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225ACPA 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 MAX6225ACPA reliable?
The price and inventory of MAX6225ACPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225ACPA is usually 5 days.
3.What payment methods are accepted for MAX6225ACPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225ACPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225ACPA?
MAX6225ACPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225ACPA 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 MAX6225ACPA?
For technical support, including MAX6225ACPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225ACPA requirements.
6.How does Aetrix verify that MAX6225ACPA is sourced from the original manufacturer or authorized distributors?
All MAX6225ACPA 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 MAX6225ACPA meets industry standards.
7.What is the process for return or replacement of MAX6225ACPA?
All MAX6225ACPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225ACPA, 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 MAX6225ACPA part is unused and in its original packaging.
Return procedure for MAX6225ACPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6225ACPA Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
