My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6225BCPA+
- Part No.:
- MAX6225BCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX6225BCPA+.pdf
- Description:
- IC VREF SERIES 0.12% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,531
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6225BCPA+ 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 load current capability and operates from 8V to 36V input, serving as the primary reference in high-resolution ADC/DAC signal chains requiring metrology-grade stability.
For engineers reviewing the MAX6225BCPA+ datasheet, MAX6225BCPA+ pinout, MAX6225BCPA+ application, or MAX6225BCPA+ equivalent, key selection criteria include its 5ppm/°C tempco grade, DIP-8 package compatibility, trim-adjustable output, low-noise performance under capacitive loads, and suitability for 16-bit data-conversion systems demanding long-term drift <20ppm/1000h.
Technical Context
The MAX6225BCPA+ employs buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature over 0°C to +70°C, enabling lab-grade voltage stability without heater power. Its internal architecture supports simultaneous sourcing and sinking up to ±15mA while maintaining sub-6ppm/mA load regulation and <5ppm/V line regulation across 10V–36V input range.
It features dedicated NR (noise reduction) and TRIM terminals for external 1µF capacitor attachment and ±25mV output adjustment respectively-both functions preserve specified tempco and long-term stability. The device remains stable with 0–100µF output capacitance and exhibits 5µs turn-on settling to ±0.01%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±3mV at +25°C - tight tolerance enables direct use in 16-bit SAR ADC reference inputs without calibration. |
| Tempco (Max) | 5.0ppm/°C - ensures ≤±125ppm (±0.313mV) drift over 0°C to +70°C operating range. |
| Initial Accuracy | ±0.02% - guarantees absolute output error ≤±0.5mV at power-up, critical for self-calibrating instruments. |
| Output Noise | 1.5µVP-P (0.1Hz–10Hz) - ultra-low flicker noise preserves SNR in precision weigh-scale and digital multimeter front-ends. |
| Load Current | ±15mA - supports driving multiple op-amp buffers or ADC reference inputs without external gain stages. |
| Long-Term Stability | 20ppm/1000h - predictable aging behavior allows reliable lifetime specification in industrial control modules. |
| Supply Current | 2.7mA typical - enables low-power operation in battery-backed precision sensors and portable test equipment. |
Pinout & Package
MAX6225BCPA+ uses an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 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) | No external connection required; floating or tied to GND has no functional impact. |
| 2 | IN | Positive supply input (8V–36V); requires local 0.1µF 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; star-point connection recommended to minimize ground bounce in mixed-signal systems. |
| 5 | TRIM | External voltage adjust input; accepts 0–2.5V to shift output ±25mV via 10kΩ potentiometer. |
| 6 | OUT | Stable 2.500V reference output; capable of sourcing/sinking ±15mA with <6ppm/mA load regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Enables 1.5µVP-P low-frequency noise and 20ppm/1000h long-term stability-superior to bandgap alternatives in metrology applications. |
| Trim-adjustable output | ±25mV range via TRIM pin allows system-level calibration to compensate for PCB trace resistance and ADC offset errors. |
| Noise-reduction terminal (NR) | 1µF capacitor on NR pin reduces integrated output noise by 40% in 10Hz–1kHz band-critical for 24-bit delta-sigma converters. |
| Capacitive-load immunity | Stable with 0–100µF output capacitance-eliminates need for isolation resistors when driving large decoupling caps or op-amp inputs. |
| Fast turn-on settling | 5µs to ±0.01% final value enables use in power-cycled instrumentation where rapid reference stabilization is mandatory. |
Applications
| High-Resolution Data Acquisition | Digital Multimeters (DMM) |
|---|---|
Use Scenario: 16-bit SAR ADC in automated test equipment digitizing sensor outputs with 100ksps sampling rate. IC Role / Device Role / Timing Role: Primary voltage reference providing stable 2.500V基准 for ADC full-scale range and internal DAC calibration. Use Value: 5ppm/°C tempco and 1.5µVP-P noise ensure ENOB ≥15.8 bits across environmental temperature swings. | Use Scenario: 6½-digit handheld DMM measuring DC voltage with auto-ranging and dual-slope integration. IC Role / Device Role / Timing Role: Precision reference for integrator ramp generation and ADC reference during measurement cycles. Use Value: ±0.02% initial accuracy and 20ppm/1000h stability enable factory calibration intervals exceeding 1 year. |
| Industrial Process Controllers | ATE Reference Subsystem |
Use Scenario: PLC analog I/O module converting 4–20mA loop signals to digital with HART communication overlay. IC Role / Device Role / Timing Role: Stable excitation reference for RTD/thermocouple signal conditioning and ADC reference for digitized loop current. Use Value: ±15mA drive capability powers external 2-wire sensor bridges while maintaining <0.005% gain error over temperature. | Use Scenario: Modular ATE slot card generating calibrated reference voltages for DUT stimulus and response validation. IC Role / Device Role / Timing Role: Low-drift reference source for programmable voltage sources and comparator thresholds in parametric test circuits. Use Value: Trim-adjustable output allows per-slot calibration to compensate for backplane voltage drop and connector contact resistance. |
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, SO-8 package, 3.6mA supply current | Lower tempco and noise but higher quiescent current; requires external buffer for ±15mA loads | Preferred when ultimate stability (<3ppm/°C) is required and board space favors SO-8 over DIP-8. |
| ADR441BRZ | 2.5V, 3ppm/°C max, 1.75µVP-P noise, SO-8 package, 4.5mA supply current, no TRIM/NR pins | Higher supply current and no external trim/noise-reduction capability; superior PSRR above 10kHz | Selected for high-PSRR requirements in noisy switch-mode power supply environments where trim flexibility is not needed. |
Compared with REF5025IDR and ADR441BRZ, the MAX6225BCPA+ offers unique DIP-8 through-hole compatibility, integrated TRIM/NR functionality, and proven ±15mA drive strength-making it optimal for legacy industrial designs, prototyping, and applications requiring field calibration and noise tailoring.
Availability
MAX6225BCPA+ is available at Aetrix Electronics and suitable for high-resolution data acquisition, digital multimeters, and industrial process controllers requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6225BCPA+ 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 precision analog, mixed-signal, and power-management ICs for industrial, medical, and test/measurement applications.
The MAX6225 series belongs to Maxim's ultra-stable voltage reference product line, engineered specifically for metrology-grade instrumentation, high-bit-depth data converters, and calibration-critical systems where drift, noise, and initial accuracy dominate system error budgets.
FAQ
What is the maximum operating temperature range for the MAX6225BCPA+?
The MAX6225BCPA+ is rated for 0°C to +70°C ambient operating temperature. This commercial-grade temperature range is defined by the "C" suffix in the part number and aligns with the 5.0ppm/°C maximum temperature coefficient specification. Operation outside this range may degrade accuracy and long-term stability beyond guaranteed limits, and the device is not characterized for extended temperature performance.
Can the MAX6225BCPA+ drive a 10µF capacitive load without oscillation?
Yes, the MAX6225BCPA+ is explicitly characterized as stable with output capacitance from 0µF to 100µF across all load currents. Its internal compensation ensures unconditional stability even with heavy capacitive loading, eliminating the need for series isolation resistors when driving large decoupling capacitors or op-amp input stages-a key advantage over many bandgap references.
How does the TRIM pin on the MAX6225BCPA+ function, and what is its adjustment range?
The TRIM pin on the MAX6225BCPA+ accepts an external voltage between 0V and VOUT to adjust the output by ±25mV (±1%). A 10kΩ potentiometer wired between OUT and GND, with its wiper connected to TRIM, provides full-range adjustment. This feature enables end-system calibration to correct for PCB trace resistance, ADC offset, or sensor nonlinearity without altering the device's specified temperature coefficient or long-term drift.
Is the MAX6225BCPA+ compatible with lead-free soldering processes?
Yes, the "+" suffix in MAX6225BCPA+ denotes a lead(Pb)-free and RoHS-compliant package. It supports standard lead-free reflow profiles with peak temperatures up to +260°C for 8-pin plastic DIP packages, as specified in the Absolute Maximum Ratings table. Proper thermal profiling and preheat ramp rates must be followed to avoid package damage during assembly.
What is the purpose of the NR pin on the MAX6225BCPA+, and how should it be used?
The NR (Noise Reduction) pin on the MAX6225BCPA+ is designed to accept an external 1µF capacitor to ground, which reduces wideband output noise by filtering high-frequency components. Adding this capacitor lowers integrated noise in the 10Hz–1kHz band by approximately 40%, directly improving effective resolution in delta-sigma ADC applications. Leaving NR open retains full bandwidth but increases susceptibility to supply-induced noise.
MAX6225BCPA+ 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:
- ±0.12%
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX6225BCPA+ FAQ
1.How can I place an order for MAX6225BCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225BCPA+ 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 MAX6225BCPA+ reliable?
The price and inventory of MAX6225BCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225BCPA+ is usually 5 days.
3.What payment methods are accepted for MAX6225BCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225BCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225BCPA+?
MAX6225BCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225BCPA+ 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 MAX6225BCPA+?
For technical support, including MAX6225BCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225BCPA+ requirements.
6.How does Aetrix verify that MAX6225BCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX6225BCPA+ 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 MAX6225BCPA+ meets industry standards.
7.What is the process for return or replacement of MAX6225BCPA+?
All MAX6225BCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225BCPA+, 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 MAX6225BCPA+ part is unused and in its original packaging.
Return procedure for MAX6225BCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6225BCPA+ 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…
