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Analog Devices Inc./Maxim Integrated MAX6325ESA+T
- Part No.:
- MAX6325ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6325ESA+T.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:608
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Product details
Overview
MAX6325ESA+T from Maxim Integrated is a precision 2.5V voltage reference IC using buried-zener technology, delivering ±0.02% initial accuracy, 0.5ppm/°C typical temperature coefficient, and 1.5µVp-p (0.1Hz–10Hz) output noise. It operates from 8V to 36V input, sources/sinks ±15mA, and targets high-resolution ADC/DAC biasing in industrial instrumentation and ATE systems.
For engineers reviewing the MAX6325ESA+T datasheet, MAX6325ESA+T pinout, MAX6325ESA+T application, or MAX6325ESA+T equivalent, key selection criteria include its low-noise performance, ±1% external trim capability, 8-pin SO package compatibility, and guaranteed load regulation up to ±15mA across –40°C to +85°C.
Technical Context
The MAX6325ESA+T implements a temperature-compensated buried-zener core with optional external trimming via the TRIM pin and wideband noise reduction via the NR pin. Its output remains stable under capacitive loads from 0µF to 100µF without oscillation.
It achieves laboratory-grade stability through a low-power curvature-compensation scheme-delivering flat temperature response without heater power-while maintaining 18mW typical quiescent power at 2.5V output and 10V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±0.02% (±0.5 mV), enabling 16-bit DAC/ADC full-scale reference accuracy |
| Tempco (max) | 1.5 ppm/°C over –40°C to +85°C, ensuring <±30 ppm drift across full industrial range |
| Noise (0.1–10 Hz) | 1.5 µVp-p, critical for sub-LSB stability in precision measurement front-ends |
| Load Regulation | 5 ppm/mA, supporting stable output under dynamic ±15 mA sourcing/sinking |
| Line Regulation | 10 ppm/V (8–36 V input), minimizing supply ripple impact on reference integrity |
| Long-Term Stability | 30 ppm/1000 hr, suitable for calibration-critical applications requiring minimal drift over time |
| Supply Current | 1.8–2.7 mA, enabling low-power system integration without thermal derating concerns |
Pinout & Package
MAX6325ESA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27 mm pitch and exposed pad not present. Pin 1 is marked by notch or dot; pins 1, 7, and 8 are internally connected and must remain unconnected in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Positive supply input | Accepts 8–36 V DC; bypass capacitor recommended for PSRR improvement |
| GND (Pin 4) | Reference ground | Primary return path; must be low-impedance and separated from digital ground |
| NR (Pin 3) | Noise reduction node | Connects to 1 µF capacitor for wideband noise suppression; open if unused |
| OUT (Pin 6) | Precision reference output | Delivers regulated 2.5 V; stable with 0–100 µF capacitive loads |
| TRIM (Pin 5) | External adjustment input | Supports ±1% output tuning via 10 kΩ potentiometer; no effect on tempco |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener architecture | Enables lowest intrinsic noise (1.5 µVp-p) and highest long-term stability (30 ppm/1000 hr) |
| Optional NR capacitor | Reduces wideband noise without compromising transient response or stability margin |
| ±15 mA source/sink capability | Eliminates need for external buffer in moderate-current reference distribution networks |
| Industry-standard 8-pin SO footprint | Ensures drop-in replacement compatibility with legacy reference designs and test fixtures |
| Stable with all capacitive loads | Removes output capacitor selection constraints-supports ceramic, tantalum, or electrolytic types |
Applications
| High-Resolution Data Acquisition | Precision Current Sources |
|---|---|
Use Scenario: 16-bit SAR ADC in portable multimeter with battery-powered analog front-end. IC Role / Device Role / Timing Role: Primary voltage reference for ADC internal conversion ladder and external sensor signal conditioning. Use Value: 0.5 ppm/°C tempco and 1.5 µVp-p noise ensure <±0.5 LSB error across temperature and time, meeting Class A DMM specifications. | Use Scenario: Programmable 4–20 mA transmitter with HART modulation in process control loop. IC Role / Device Role / Timing Role: Stable excitation reference for current-sense resistor and DAC feedback path. Use Value: ±15 mA drive capability enables direct current-source configuration without op-amp buffer, reducing component count and thermal drift sources. |
| Digital Voltmeters | ATE Equipment |
Use Scenario: Benchtop 6½-digit DVM requiring traceable, low-drift reference for auto-ranging and calibration routines. IC Role / Device Role / Timing Role: Master reference for internal ADC, DAC-based offset nulling, and self-calibration engine. Use Value: 30 ppm/1000 hr long-term stability supports extended calibration intervals (>1 year) without field recalibration. | Use Scenario: High-speed parametric tester verifying mixed-signal SoCs with multi-channel voltage monitoring. IC Role / Device Role / Timing Role: Per-channel reference for precision comparator thresholds and analog stimulus generation. Use Value: Excellent transient response (<8 µs settling to ±0.01%) ensures accurate pass/fail decisions during fast digital pattern switching. |
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 | 2.5 V, 3 ppm/°C max tempco, 1.2 µVp-p noise, 10 mA max output, SO-8 package | Limited sink capability (0 mA); requires external buffer for bidirectional load current | Preferred when ultra-low noise dominates over drive strength and cost sensitivity is low |
| ADR441BRZ | 2.5 V, 1.5 ppm/°C max tempco, 1.75 µVp-p noise, ±10 mA output, SO-8 package | Higher noise floor and lower output current than MAX6325ESA+T; no NR pin | Suitable where noise reduction flexibility is not required and board space allows minor layout revision |
Compared with REF5025IDR and ADR441BRZ, the MAX6325ESA+T uniquely combines ±15 mA bidirectional drive, dedicated NR pin for configurable noise filtering, and industry-standard SO-8 footprint-making it optimal for compact, high-dynamic-range reference distribution without buffering.
Availability
MAX6325ESA+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, precision current sources, and automated test equipment requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX6325ESA+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 and mixed-signal semiconductor solutions for industrial, automotive, and communications markets.
The MAX6325ESA+T belongs to Maxim's precision voltage reference product line, engineered specifically for metrology-grade stability and low-noise operation in calibration-critical and high-resolution conversion systems.
FAQ
What is the maximum input voltage rating for the MAX6325ESA+T?
The MAX6325ESA+T has an absolute maximum input voltage rating of 40 V referenced to GND. However, the specified operating input range is 8 V to 36 V. Operation above 36 V risks exceeding safe power dissipation limits and may compromise long-term reliability-even if within absolute ratings-so design margins should maintain VIN ≤36 V under all conditions including transients.
Does the MAX6325ESA+T require an output capacitor to remain stable?
No, the MAX6325ESA+T is explicitly designed to be stable with any capacitive load from 0 µF to 100 µF, regardless of ESR or dielectric type. Unlike many bandgap references, it does not require a minimum output capacitance for phase margin-enabling direct connection to ADC reference inputs or op-amp buffers without added components.
Can the MAX6325ESA+T sink current, and how much?
Yes, the MAX6325ESA+T can both source and sink up to ±15 mA continuously. This bidirectional capability allows it to actively absorb current from external circuits-such as op-amp feedback networks or pull-up resistors-without requiring additional active components, simplifying precision current-source and dual-rail reference designs.
What is the purpose of the NR pin on the MAX6325ESA+T?
The NR (Noise Reduction) pin on the MAX6325ESA+T accepts an external capacitor (typically 1 µF) to suppress wideband output noise beyond the 0.1–10 Hz band. Adding this capacitor reduces high-frequency noise without degrading transient response or stability, and leaving it open retains the base 1.5 µVp-p (0.1–10 Hz) specification.
Is the MAX6325ESA+T pin-compatible with other members of the MAX63xx family?
Yes, the MAX6325ESA+T shares identical pinout, package, and functional interface with MAX6341ESA+T and MAX6350ESA+T-including IN, GND, NR, OUT, TRIM, and internally connected pins. Only the output voltage differs (2.5 V vs. 4.096 V vs. 5 V), allowing hardware reuse across multiple reference voltage requirements in the same platform.
MAX6325ESA+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:
- 1.5ppm/°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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6325ESA+T FAQ
1.How can I place an order for MAX6325ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6325ESA+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 MAX6325ESA+T reliable?
The price and inventory of MAX6325ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6325ESA+T is usually 5 days.
3.What payment methods are accepted for MAX6325ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6325ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6325ESA+T?
MAX6325ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6325ESA+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 MAX6325ESA+T?
For technical support, including MAX6325ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6325ESA+T requirements.
6.How does Aetrix verify that MAX6325ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX6325ESA+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 MAX6325ESA+T meets industry standards.
7.What is the process for return or replacement of MAX6325ESA+T?
All MAX6325ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6325ESA+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 MAX6325ESA+T part is unused and in its original packaging.
Return procedure for MAX6325ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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