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Analog Devices Inc. ADR4525ARZ-R7
- Part No.:
- ADR4525ARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR4525ARZ-R7.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,668
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Product details
Overview
ADR4525ARZ-R7 from Analog Devices is a precision 2.500 V ultralow-noise voltage reference IC in an 8-lead SOIC package, delivering ±0.02% initial accuracy (B/C/D grade), 1.25 μV p-p (0.1 Hz to 10 Hz) output noise, and 2 ppm/°C max temperature coefficient over −40°C to +125°C. It serves as the stable reference core in high-resolution ADCs, precision data acquisition systems, and automotive battery monitors.
For engineers reviewing the ADR4525ARZ-R7 datasheet, ADR4525ARZ-R7 pinout, ADR4525ARZ-R7 application, or ADR4525ARZ-R7 equivalent, key selection criteria include its 950 μA max quiescent current, 500 mV dropout at 2 mA, 10 mA sourcing/sinking capability, and AEC-Q100 qualification for automotive use - all critical for low-power, high-stability analog signal chains.
Technical Context
The ADR4525ARZ-R7 employs an advanced buried-zener core with proprietary thermal stabilization to achieve industry-leading noise and drift performance. Its dual-path ground architecture (GNDSENSE/GNDFORCE in LCC variants) is not present in the SOIC-packaged ADR4525ARZ-R7; this variant uses a single GND pin and standard 3-terminal configuration.
It operates across 3 V to 15 V input, supports up to 100 µF output capacitance, and maintains regulation down to 500 mV dropout at 2 mA load. The device exhibits 125 µs turn-on settling time with 1 µF output capacitor and delivers 90 dB ripple rejection at 1 kHz - enabling robust operation in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±0.02% (max initial error, B/C/D grade) - enables direct interface with 2.5 V full-scale SAR and sigma-delta ADCs without scaling. |
| Tempco (TCVOUT) | 2 ppm/°C max (B grade, −40°C to +125°C, box method) - ensures ≤25 ppm total drift over industrial temperature range. |
| Output Noise | 1.25 μV p-p (0.1 Hz to 10 Hz) - minimizes quantization uncertainty in 24-bit+ data converters. |
| Quiescent Current | 950 μA max - supports battery-powered portable instrumentation with multi-year runtime. |
| Dropout Voltage | 500 mV at 2 mA load - allows operation from 3.0 V supply while maintaining regulation for low-voltage systems. |
| Ripple Rejection | 90 dB at 1 kHz - suppresses switching regulator noise coupling into precision analog front-ends. |
| Long-Term Drift | 51 ppm typical at 4500 hours (B grade) - reduces calibration frequency in field-deployed test equipment. |
Pinout & Package
ADR4525ARZ-R7 is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, RoHS-compliant and moisture sensitivity level MSL-1. Pin 1 is marked with a dot or bevel; the package has standard JEDEC MS-012AC dimensions (4.90 mm × 3.91 mm × 1.75 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NIC | Not internally connected - left floating or tied to GND per layout best practice; no electrical function. |
| 2 | VIN | Main input voltage connection - accepts 3 V to 15 V; requires local 0.1 µF ceramic decoupling. |
| 3 | NIC | Not internally connected - no internal bond wire; must remain unconnected. |
| 4 | GND | Reference ground return - connect to low-impedance system ground plane with short trace. |
| 5 | NIC | Not internally connected - electrically isolated; avoid routing signals underneath. |
| 6 | VOUT | Stable 2.500 V output - drives ADC reference inputs, DACs, or comparator thresholds directly. |
| 7 | NIC | Not internally connected - no internal connection; do not route traces or vias to this pad. |
| 8 | DNC | Do not connect - electrically isolated; must remain open-circuit per datasheet requirement. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 0.1 Hz–10 Hz noise | 1.25 μV p-p enables <1 LSB error in 24-bit, 1 MSPS SAR ADCs at full scale. |
| High initial accuracy | ±0.02% (500 µV @ 2.5 V) eliminates need for post-manufacture trimming in production test fixtures. |
| Low dropout operation | 500 mV dropout at 2 mA allows use with 3.0 V LDOs or single-cell Li-ion systems with headroom margin. |
| AEC-Q100 qualified | Grade 1 (−40°C to +125°C) qualification confirmed - suitable for under-hood automotive battery sensing. |
| Robust long-term stability | 8 ppm typical drift at 4500 hours (D grade) supports 15-year calibration intervals in medical diagnostic gear. |
Applications
| High-Resolution Data Acquisition | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: 24-bit isolated ΣΔ ADC measuring thermocouple or strain gauge signals in industrial PLC modules. IC Role / Device Role / Timing Role: Primary voltage reference for ADC's internal conversion core and external gain-stage biasing. Use Value: 1.25 μV p-p noise and 2 ppm/°C tempco ensure <±0.005% total measurement uncertainty over temperature and time. |
Use Scenario: Real-time monitoring of 12 V lead-acid or 48 V EV battery pack cell voltages in BMS units. IC Role / Device Role / Timing Role: Stable reference for multiplexed 16-bit SAR ADC sampling individual cell voltages. Use Value: AEC-Q100 Grade 1 rating and 51 ppm 4500-hour drift enable reliable lifetime performance in harsh vehicle environments. |
| Precision Medical Instrumentation | Calibration Equipment |
|
Use Scenario: Portable ECG amplifier with programmable gain and 22-bit resolution for clinical-grade waveform capture. IC Role / Device Role / Timing Role: Reference source for both analog front-end PGA and successive-approximation ADC. Use Value: 950 μA quiescent current and 125 µs settling support low-power, fast-settling acquisition in handheld devices. |
Use Scenario: Benchtop multimeter or automated test equipment requiring traceable DC voltage standards. IC Role / Device Role / Timing Role: Primary reference in self-calibrating DAC-based voltage source subsystems. Use Value: ±0.02% initial error and 8 ppm 4500-hour drift reduce annual recalibration burden and improve metrology confidence. |
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, 1.5 μV p-p noise, 1 mA IQ, SOIC-8 - higher noise and looser tempco than ADR4525ARZ-R7. | Targeted at cost-sensitive industrial DAQ where 0.5 ppm/°C extra drift is acceptable. | Select REF5025IDR only if budget constraints outweigh need for lowest noise and tightest tempco. |
| MAX6126AASA25+ | 2.5 V, 3 ppm/°C max tempco, 1.6 μV p-p noise, 1.1 mA IQ, SOIC-8 - slightly higher noise and quiescent current. | Suitable for general-purpose instrumentation where AEC-Q100 is not required. | Choose MAX6126AASA25+ when automotive qualification is unnecessary and legacy design reuse is prioritized. |
Compared with REF5025IDR and MAX6126AASA25+, the ADR4525ARZ-R7 offers superior 1.25 μV p-p noise, tighter 2 ppm/°C tempco, lower 950 μA quiescent current, and AEC-Q100 qualification - making it the optimal choice for high-end automotive, medical, and metrology applications demanding long-term stability and minimal system-level error.
Availability
ADR4525ARZ-R7 is available at Aetrix Electronics and suitable for precision data acquisition systems, high-resolution data converters, and automotive battery monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADR4525ARZ-R7 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, headquartered in Wilmington, MA.
The ADR45xx family was designed specifically for ultra-precision voltage reference applications in test & measurement, medical imaging, and automotive safety systems - emphasizing ultralow noise, sub-ppm/°C stability, and AEC-Q100 compliance.
FAQ
What is the maximum operating temperature range for the ADR4525ARZ-R7?
The ADR4525ARZ-R7 is rated for operation from −40°C to +125°C (B grade), meeting industrial and automotive under-hood requirements. D grade variants are limited to 0°C to +70°C, but ADR4525ARZ-R7 is specified for the extended range per its ordering code and datasheet Table 2.
Does the ADR4525ARZ-R7 require external capacitors for stability?
Yes, the ADR4525ARZ-R7 requires a minimum 0.1 µF ceramic capacitor on VIN and supports up to 100 µF on VOUT. A 1 µF output capacitor is recommended for optimal 125 µs turn-on settling time and low-frequency noise suppression, as verified in Figure 21 of the Rev. G datasheet.
Is the ADR4525ARZ-R7 pin-compatible with earlier ADR44x or ADR43x references?
No, the ADR4525ARZ-R7 is not pin-compatible with ADR44x or ADR43x families. Its 8-lead SOIC pinout (NIC-VIN-NIC-GND-NIC-VOUT-NIC-DNC) differs fundamentally from the 5-lead SOT-23 and 8-lead SOIC layouts of prior series, which feature different terminal assignments and grounding schemes.
What does the "R7" suffix indicate in ADR4525ARZ-R7?
The "R7" suffix denotes tape-and-reel packaging with 1,000 units per reel, standard for automated SMT assembly. The "ARZ" portion specifies the 8-lead SOIC package (Z = SOIC_N) and industrial temperature grade (A = grade designation per Analog Devices' ordering guide).
Can the ADR4525ARZ-R7 drive a 10 kΩ load directly?
Yes, the ADR4525ARZ-R7 can drive a 10 kΩ load (250 µA at 2.5 V) with negligible error: its load regulation is specified at 30–80 ppm/mA over −40°C to +125°C, translating to <0.02 mV shift - well within its ±0.02% initial accuracy band. No buffer is required for such loads.
ADR4525ARZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-R7 FAQ
1.How can I place an order for ADR4525ARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR4525ARZ-R7 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-R7 reliable?
The price and inventory of ADR4525ARZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR4525ARZ-R7 is usually 5 days.
3.What payment methods are accepted for ADR4525ARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR4525ARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR4525ARZ-R7?
ADR4525ARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR4525ARZ-R7 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-R7?
For technical support, including ADR4525ARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR4525ARZ-R7 requirements.
6.How does Aetrix verify that ADR4525ARZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADR4525ARZ-R7 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-R7 meets industry standards.
7.What is the process for return or replacement of ADR4525ARZ-R7?
All ADR4525ARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR4525ARZ-R7, 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-R7 part is unused and in its original packaging.
Return procedure for ADR4525ARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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