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Analog Devices Inc. ADR4525ARZ
- Part No.:
- ADR4525ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR4525ARZ.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,933
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Product details
Overview
ADR4525ARZ from Analog Devices is an ultralow-noise, high-accuracy 2.500 V voltage reference IC with ±0.02% initial error (B/C/D grade), 0.8 ppm/°C max temperature coefficient (D grade, 0°C to 70°C), and 1.25 μV p-p (0.1 Hz–10 Hz) output noise - deployed in precision ADC biasing, battery monitoring, and medical sensor signal chains.
For engineers reviewing the ADR4525ARZ datasheet, ADR4525ARZ pinout, ADR4525ARZ application, or ADR4525ARZ equivalent, this page delivers verified specifications, SOIC-8 pin mapping, real-world use cases, and validated alternative options for high-stability analog subsystem design.
Technical Context
The ADR4525ARZ employs an advanced buried-zener core topology optimized for minimal thermal hysteresis and long-term drift (8 ppm typical at 4500 hours). Its dual-path ground sensing (GNDSENSE/GNDFORCE) and output sensing (VOUTSENSE/VOUTFORCE) enable Kelvin connections to reject PCB trace resistance errors in high-precision systems.
It operates from 3 V to 15 V input with 950 μA max quiescent current and supports ±10 mA load current while maintaining low dropout (500 mV at 2 mA). Ripple rejection exceeds 90 dB at 1 kHz, making it suitable for noisy supply environments common in industrial and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±0.02% (B/C/D grade) - enables direct interface with 16-bit+ SAR and delta-sigma ADCs without trimming. |
| Tempco (max) | 0.8 ppm/°C (D grade, 0°C to 70°C) - ensures ≤1.25 μV drift over full commercial range, critical for portable instrumentation. |
| Output Noise | 1.25 μV p-p (0.1 Hz–10 Hz) - minimizes quantization uncertainty in high-resolution data acquisition systems. |
| Quiescent Current | 950 μA max - allows operation from coin-cell or energy-harvested supplies in low-power sensor nodes. |
| Dropout Voltage | 500 mV at 2 mA load - supports regulation from 3 V rails (e.g., Li-ion or regulated 3.3 V) with margin. |
| Ripple Rejection | 90 dB at 1 kHz - suppresses switching regulator noise without additional LC filtering. |
| Long-Term Drift | 8 ppm typical at 4500 hours (D grade) - reduces calibration frequency in field-deployed test equipment. |
Pinout & Package
ADR4525ARZ is supplied in an 8-lead SOIC package (RoHS-compliant, JEDEC MS-012). Pin functions are defined per Analog Devices Rev. G datasheet Figure 3 and Table 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NIC | Not internally connected - leave unconnected or float; no routing required. |
| 2 | VIN | Main input voltage connection - requires local 0.1 µF ceramic decoupling capacitor. |
| 3 | NIC | Not internally connected - leave unconnected or float. |
| 4 | GND | Power ground reference - connect to low-impedance system ground plane. |
| 5 | NIC | Not internally connected - leave unconnected or float. |
| 6 | VOUT | Regulated 2.500 V output - drives ADC reference inputs, DAC bias, or op-amp precision circuits. |
| 7 | NIC | Not internally connected - leave unconnected or float. |
| 8 | DNC | Do not connect - must remain open; no bond wire or internal circuitry attached. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 0.1 Hz–10 Hz noise | 1.25 μV p-p enables <18-bit effective resolution in 24-bit sigma-delta ADCs without averaging. |
| Separate sense and force pins (LCC variant only) | Not applicable to ADR4525ARZ (SOIC package); this feature is exclusive to LCC variants (e.g., ADR4525BRZ). |
| AEC-Q100 qualified option | ADR4525W variant is automotive-qualified; ADR4525ARZ is industrial-grade (−40°C to +125°C B grade). |
| Low thermal hysteresis | ≤5 ppm (D grade, 25°C→70°C→25°C cycle) - preserves accuracy after thermal cycling in embedded controllers. |
| High PSRR | 90 dB at 1 kHz - maintains output stability when powered from DC/DC converters with 100–500 kHz switching frequencies. |
Applications
| Precision Data Acquisition | Medical Sensor Front-End |
|---|---|
Use Scenario: 24-bit isolated thermocouple measurement in portable patient monitors. IC Role / Device Role / Timing Role: Provides stable 2.500 V reference for sigma-delta ADC and programmable gain amplifier. Use Value: 1.25 μV p-p noise and 0.8 ppm/°C tempco ensure <±0.05°C measurement repeatability across operating temperature. |
Use Scenario: ECG analog front-end requiring ultra-low drift baseline stability. IC Role / Device Role / Timing Role: Supplies reference voltage to instrumentation amplifier and anti-alias filter op-amps. Use Value: 8 ppm long-term drift at 4500 hours minimizes recalibration needs between clinical device servicing intervals. |
| Industrial Battery Monitoring | Automotive 12 V System Diagnostics |
Use Scenario: High-side voltage sensing of 4S Li-ion packs in factory automation AGVs. IC Role / Device Role / Timing Role: Reference for isolated ADC measuring cell stack voltage with 0.01% full-scale accuracy. Use Value: ±0.02% initial error and 2 ppm/°C (B grade) tempco maintain accuracy across −25°C to +70°C vehicle bay temperatures. |
Use Scenario: Onboard diagnostics module monitoring 12 V rail health during cold cranking. IC Role / Device Role / Timing Role: Precision reference for microcontroller ADC sampling battery voltage under pulsed load conditions. Use Value: 90 dB ripple rejection prevents false low-voltage warnings caused by alternator switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | 2.5 V, 3 ppm/°C max tempco (−40°C to +125°C), 1.6 μV p-p noise, SOIC-8, 1 mA IQ. | Higher noise and looser tempco than ADR4525ARZ; better suited for cost-sensitive industrial controls vs. metrology-grade systems. | Select REF5025IDR where 3 ppm/°C stability suffices and sub-μV noise is noncritical. |
| LT6655IMS8-2.5 | 2.5 V, 1 ppm/°C max tempco (−40°C to +125°C), 1.5 μV p-p noise, MSOP-8, 1.1 mA IQ. | Smaller MSOP-8 footprint and slightly higher IQ; comparable noise but tighter tempco than ADR4525ARZ D grade. | Choose LT6655IMS8-2.5 when board space is constrained and 1 ppm/°C performance is required over extended temperature. |
Compared with REF5025IDR and LT6655IMS8-2.5, the ADR4525ARZ offers the lowest 0.1 Hz–10 Hz noise (1.25 μV p-p) and best tempco in D grade (0.8 ppm/°C), making it optimal for portable, battery-powered precision instruments where noise and thermal stability dominate selection criteria.
Availability
ADR4525ARZ is available at Aetrix Electronics and suitable for precision data acquisition systems, medical sensor front-ends, and industrial battery monitoring requiring stable component supply with guaranteed long-term availability.
Supply support for ADR4525ARZ 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets.
The ADR45xx family was designed specifically for metrology-grade voltage reference applications demanding ultralow noise, sub-1 ppm/°C stability, and low drift - targeting high-resolution data converters and precision instrumentation.
FAQ
What is the maximum operating temperature range for the ADR4525ARZ?
The ADR4525ARZ is rated for −40°C to +125°C (B grade) per its datasheet. The part shipped in SOIC packaging with "ARZ" suffix corresponds to the B grade, which guarantees full electrical performance across that extended industrial temperature range - unlike C/D grades limited to 0°C to +70°C.
Does the ADR4525ARZ require external capacitors for stability?
Yes, the ADR4525ARZ requires a minimum 0.1 µF ceramic capacitor on VIN and recommends 1 µF on VOUT for optimal transient response and noise suppression. These values are validated in the datasheet's "Input and Output Capacitors" section and are essential to achieve specified 125 µs turn-on settling time and 90 dB ripple rejection.
Is the ADR4525ARZ pin-compatible with other ADR45xx series devices?
No - while all ADR45xx devices share the same 8-lead SOIC package and pinout (VIN, GND, VOUT, DNC/NIC), output voltage differs per model (e.g., ADR4520 = 2.048 V, ADR4530 = 3.000 V). Swapping ADR4525ARZ for another ADR45xx part without adjusting downstream biasing will cause system-level reference mismatch and measurement error.
Can the ADR4525ARZ drive a 10 kΩ load directly?
Yes - the ADR4525ARZ sources/sinks ±10 mA, so a 10 kΩ load drawing 250 µA at 2.5 V is well within specification. However, load regulation error (≤80 ppm/mA) means a 250 µA load shift introduces up to 20 ppm (0.05 µV) output deviation - acceptable for most 16-bit systems but may require compensation in 20-bit+ designs.
What does the 'ARZ' suffix indicate for the ADR4525ARZ?
The 'ARZ' suffix denotes an 8-lead SOIC package (R), tape-and-reel packaging (Z), and B grade temperature rating (A). Per Analog Devices ordering guide, 'ARZ' confirms −40°C to +125°C operation, ±0.02% initial accuracy, and 2 ppm/°C max tempco - distinguishing it from 'BRZ' (LCC), 'W' (automotive), or 'CRZ' (C grade) variants.
ADR4525ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 4ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.25µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3V ~ 15V
- Current - Supply:
- 950µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADR4525ARZ FAQ
1.How can I place an order for ADR4525ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR4525ARZ 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 ADR4525ARZ reliable?
The price and inventory of ADR4525ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR4525ARZ is usually 5 days.
3.What payment methods are accepted for ADR4525ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR4525ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR4525ARZ?
ADR4525ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR4525ARZ 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 ADR4525ARZ?
For technical support, including ADR4525ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR4525ARZ requirements.
6.How does Aetrix verify that ADR4525ARZ is sourced from the original manufacturer or authorized distributors?
All ADR4525ARZ 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 ADR4525ARZ meets industry standards.
7.What is the process for return or replacement of ADR4525ARZ?
All ADR4525ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADR4525ARZ, 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 ADR4525ARZ part is unused and in its original packaging.
Return procedure for ADR4525ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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