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Analog Devices Inc. ADR445ARZ-REEL7
- Part No.:
- ADR445ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR445ARZ-REEL7.pdf
- Description:
- IC VREF SERIES 0.12% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,287
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Product details
Overview
ADR445ARZ-REEL7 from Analog Devices is a precision 5.000 V XFET® voltage reference IC with ultralow 0.1 Hz–10 Hz noise (2.25 µV p-p), ±2 mV initial accuracy (B grade), and 3 ppm/°C temperature coefficient over −40°C to +125°C. It sources +10 mA and sinks −5 mA, operates with only 500 mV supply headroom, and is used in high-resolution ADCs and portable medical instrumentation.
For engineers reviewing the ADR445ARZ-REEL7 datasheet, ADR445ARZ-REEL7 pinout, ADR445ARZ-REEL7 application, or ADR445ARZ-REEL7 equivalent, key selection criteria include output noise floor, load regulation stability under bidirectional current, trim-adjustable output, low dropout operation, and extended industrial temperature support.
Technical Context
The ADR445ARZ-REEL7 implements Analog Devices' XFET® architecture-using two matched JFETs with one featuring an extra channel implant-to generate a stable ~0.5 V intrinsic reference, then applies PTAT-based curvature correction for minimal temperature drift. Its core design eliminates buried Zener limitations while achieving lower noise than bandgap references.
It supports bidirectional output current (±10 mA / ∓5 mA), includes a dedicated TRIM pin for ±0.5% output adjustment without performance degradation, and maintains specified accuracy across its full 5.5 V to 18 V input range with fixed 500 mV dropout headroom.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V (B grade), ±2 mV initial accuracy ensures ≤0.04% absolute error at 25°C. |
| Temperature Coefficient | 3 ppm/°C (B grade) guarantees ≤375 ppm total drift over −40°C to +125°C. |
| Voltage Noise | 2.25 µV p-p (0.1 Hz–10 Hz) enables sub-20-bit effective resolution in precision data acquisition. |
| Supply Headroom | 500 mV minimum VIN–VOUT allows operation from 5.5 V supply-critical for low-voltage battery systems. |
| Output Current | +10 mA source / −5 mA sink capability drives ADC reference inputs and small analog circuitry directly. |
| Operating Range | −40°C to +125°C ambient rating supports deployment in industrial process control and automotive-adjacent environments. |
| Long-Term Stability | 50 ppm drift over 1000 hours ensures calibration integrity in field-deployed instrumentation. |
Pinout & Package
ADR445ARZ-REEL7 is housed in an 8-lead SOIC_N (R suffix) package with exposed pad, rated for θJA = 130°C/W. Pin 1 and Pin 8 are DNC (Do Not Connect); Pins 3 and 7 are NIC (Not Internally Connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | DNC | Must remain unconnected-no internal bond wire or circuit connection. |
| 2 | VIN | Main power input; requires ≥5.5 V and 0.1 µF bypass capacitor for stability. |
| 3, 7 | NIC | No internal connection; floating but electrically isolated-no routing or grounding required. |
| 4 | GND | Analog ground reference; must connect to low-impedance system ground plane. |
| 5 | TRIM | Adjustment node for ±0.5% output tuning via external resistor divider; no loading permitted. |
| 6 | VOUT | Regulated 5.000 V output; capable of sourcing 10 mA or sinking 5 mA into load. |
Key Features
| Feature | Design Value |
|---|---|
| XFET® Reference Core | Eliminates Zener noise and curvature nonlinearity-delivers 3 ppm/°C drift without external compensation. |
| Ultralow 0.1–10 Hz Noise | 2.25 µV p-p enables <20-bit ENOB in sigma-delta ADCs without external filtering. |
| Bidirectional Output Drive | +10 mA / −5 mA capability supports active biasing, current-sinking DAC references, and bipolar signal conditioning. |
| Trim-Adjustable Output | TRIM pin allows factory or system-level calibration to ±0.5% without degrading TC or noise performance. |
| Low Dropout Operation | 500 mV headroom permits use with 5.5 V supplies-ideal for single-cell Li-ion or USB-powered instruments. |
Applications
| High-Resolution Data Acquisition | Precision Portable Medical Instruments |
|---|---|
Use Scenario: 24-bit delta-sigma ADC front-end in automated test equipment requiring stable, low-noise reference for accurate DC measurements. IC Role / Device Role / Timing Role: Primary voltage reference supplying VREF+ and VREF− to ADC, establishing full-scale quantization step. Use Value: 2.25 µV p-p noise and 3 ppm/°C drift ensure <0.001% gain error drift and maintain 19.5+ ENOB across temperature. | Use Scenario: Battery-powered ECG monitor with integrated analog front-end and low-power microcontroller. IC Role / Device Role / Timing Role: Precision reference for analog sensor signal conditioning and ADC conversion in compact wearable form factor. Use Value: 500 mV dropout enables direct operation from 5.5 V Li-ion supply; ±5 mA sink capability supports active filter biasing without additional op-amps. |
| Industrial Process Control Sensors | Optical Network Monitoring Circuits |
Use Scenario: 4–20 mA transmitter module with HART communication, requiring long-term stability and EMC robustness. IC Role / Device Role / Timing Role: Stable excitation reference for RTD/thermocouple signal chains and loop-powered analog output stage. Use Value: 50 ppm/1000 hr long-term stability minimizes recalibration frequency; −40°C to +125°C rating ensures reliability in harsh plant environments. | Use Scenario: Laser diode bias control and photodiode transimpedance amplifier in fiber-optic transceivers. IC Role / Device Role / Timing Role: Low-noise reference for precision current source generating laser bias and monitoring reference voltages. Use Value: 45 nV/√Hz broadband noise density prevents reference-induced jitter in high-speed optical sampling circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR455BRZ-REEL7 | Same 5.0 V output, improved 1.5 ppm/°C TC and 1.75 µV p-p noise; larger SOIC package (θJA = 130°C/W same). | Targeted at metrology-grade systems where <1 ppm/°C drift is mandatory; higher cost and longer lead time. | Select ADR455BRZ-REEL7 only when TC specification must be tightened beyond 3 ppm/°C without changing layout. |
| REF5050IDR | 5.0 V output, 3 ppm/°C TC, but 4 µV p-p noise (0.1–10 Hz); 8-pin SOIC, 3.5 mA quiescent current vs. 3.75 mA typical. | Lower-cost alternative for moderate-precision applications where noise >2 µV p-p is acceptable. | Choose REF5050IDR if system-level SNR budget allows higher reference noise and long-term stability >100 ppm is tolerable. |
Compared with ADR445ARZ-REEL7, ADR455BRZ-REEL7 delivers tighter drift and lower noise at premium cost and identical board footprint, while REF5050IDR trades noise and stability for cost reduction-making ADR445ARZ-REEL7 the optimal balance for industrial-grade 20+ bit data acquisition.
Availability
ADR445ARZ-REEL7 is available at Aetrix Electronics and suitable for precision data acquisition systems, portable medical instruments, and industrial process control requiring stable component supply with guaranteed long-term availability.
Supply support for ADR445ARZ-REEL7 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 Norwood, MA.
The ADR44x family was designed specifically for high-accuracy, low-noise voltage reference needs in precision measurement, medical, and industrial instrumentation-leveraging XFET® technology to surpass traditional bandgap and buried Zener performance limits.
FAQ
What is the output voltage tolerance and temperature coefficient of ADR445ARZ-REEL7?
The ADR445ARZ-REEL7 is the B-grade variant, delivering 5.000 V nominal output with ±2 mV initial accuracy (0.04%) and a maximum temperature coefficient of 3 ppm/°C over −40°C to +125°C. This ensures total output variation remains within ±375 ppm across its full operating temperature range, making it suitable for high-stability applications like calibrated test equipment.
Can ADR445ARZ-REEL7 sink current, and how much?
Yes, ADR445ARZ-REEL7 can actively sink up to −5 mA of output current, enabling use in circuits requiring bidirectional reference loading-such as active filter biasing or current-sinking DAC references. This capability eliminates the need for external pull-down circuitry and maintains regulation integrity even under reverse current conditions.
What is the minimum supply voltage required for ADR445ARZ-REEL7 to regulate properly?
The ADR445ARZ-REEL7 requires a minimum supply voltage of 5.5 V, defined by its 500 mV dropout headroom above the 5.000 V output. Below 5.5 V, regulation fails and output collapses; operation is fully specified from 5.5 V to 18 V, with line regulation maintained at ±20 ppm/V across that range.
How does the TRIM pin on ADR445ARZ-REEL7 function, and what is its adjustment range?
The TRIM pin (Pin 5) allows fine-tuning of the ADR445ARZ-REEL7 output voltage over a ±0.5% range (±25 mV around 5.000 V) using an external resistor divider. Adjustment is achieved without compromising temperature coefficient, noise, or long-term stability-enabling post-assembly calibration or compensation for system-level gain errors.
Is ADR445ARZ-REEL7 compatible with standard 8-lead SOIC PCB footprints, and are all pins connected?
ADR445ARZ-REEL7 uses the standard 8-lead SOIC_N (R suffix) footprint, but Pins 1 and 8 are DNC (Do Not Connect) and Pins 3 and 7 are NIC (Not Internally Connected). Only Pins 2 (VIN), 4 (GND), 5 (TRIM), and 6 (VOUT) require routing-ensuring compatibility with generic SOIC layouts while mandating strict adherence to the DNC/NIC rules to avoid malfunction.
ADR445ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- XFET®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.12%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.25µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 5.5V ~ 18V
- Current - Supply:
- 3.75mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADR445ARZ-REEL7 FAQ
1.How can I place an order for ADR445ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR445ARZ-REEL7 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 ADR445ARZ-REEL7 reliable?
The price and inventory of ADR445ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR445ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR445ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR445ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR445ARZ-REEL7?
ADR445ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR445ARZ-REEL7 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 ADR445ARZ-REEL7?
For technical support, including ADR445ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR445ARZ-REEL7 requirements.
6.How does Aetrix verify that ADR445ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR445ARZ-REEL7 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 ADR445ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR445ARZ-REEL7?
All ADR445ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR445ARZ-REEL7, 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 ADR445ARZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR445ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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