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Analog Devices Inc. ADR441TRZ-EP-R7
- Part No.:
- ADR441TRZ-EP-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR441TRZ-EP-R7.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,893
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Product details
Overview
ADR441TRZ-EP-R7 from Analog Devices is an ultralow-noise, precision XFET® voltage reference with 2.500 V nominal output, ±1 mV initial accuracy, 5 ppm/°C max temperature drift over −55°C to +125°C, 1.2 µV p-p (0.1 Hz to 10 Hz) noise, and ±10 mA/−5 mA output current capability. It serves as a stable reference for high-resolution ADCs and DACs in avionics and military data acquisition systems.
For engineers reviewing the ADR441TRZ-EP-R7 datasheet, ADR441TRZ-EP-R7 pinout, ADR441TRZ-EP-R7 application, or ADR441TRZ-EP-R7 equivalent, key selection criteria include military-grade temperature range, low dropout headroom (500 mV), trim-adjustable output, and enhanced product qualification for defense programs.
Technical Context
The ADR441TRZ-EP-R7 implements Analog Devices' XFET® technology-combining implanted junction FETs with curvature-corrected temperature compensation-to achieve sub-5 ppm/°C drift and eliminate Zener-related noise and voltage hysteresis. Its architecture supports both sourcing (+10 mA) and sinking (−5 mA) without external components.
It operates across 3 V to 18 V supply while maintaining regulation at only 500 mV headroom, delivers 48 nV/√Hz broadband noise at 1 kHz, and features a dedicated TRIM pin enabling ±0.5% output adjustment with no degradation in drift or noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±1 mV - enables direct interface with 2.5 V full-scale SAR and sigma-delta ADCs without gain calibration. |
| Temp Drift | 5 ppm/°C max (−55°C to +125°C) - ensures ≤125 µV total output shift across military temperature range. |
| Voltage Noise | 1.2 µV p-p (0.1 Hz–10 Hz) - critical for 20+ bit DC-precision measurement front-ends. |
| Dropout Headroom | 500 mV - allows operation from 3.0 V supply with 2.5 V output, supporting low-voltage battery-powered instruments. |
| Output Current | +10 mA source / −5 mA sink - drives multiple ADC references or op-amp bias networks without external buffers. |
| Long-Term Stability | 50 ppm / 1000 hours - guarantees minimal calibration drift in deployed avionics and unmanned system platforms. |
Pinout & Package
The ADR441TRZ-EP-R7 is housed in an 8-lead narrow SOIC package (JEDEC MS-012-AA, R-8), with 1.27 mm lead pitch and thermal resistance θJA = 130°C/W under JEDEC 2S2P conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | DNC | Do Not Connect - floating pins; PCB pads must remain unconnected to avoid parasitic coupling or ESD path disruption. |
| 2 | VIN | Input voltage supply - requires ≥10 µF bulk capacitance and 0.1 µF ceramic close to pin for stability under load transients. |
| 3, 7 | NIC | Not Internally Connected - electrically isolated; may be grounded or left open per layout best practices. |
| 4 | GND | Analog ground reference - must connect to clean, low-impedance ground plane; separate from digital ground if mixed-signal PCB. |
| 5 | TRIM | Output voltage adjustment - connects to external potentiometer (10 kΩ typical) for ±0.5% fine-tuning without affecting drift or noise. |
| 6 | VOUT | Stable 2.500 V reference output - requires 0.1 µF ceramic capacitor directly at pin for optimal noise suppression and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| XFET® Reference Core | Eliminates Zener knee voltage nonlinearity and hysteresis, delivering monotonic, repeatable output vs. temperature and time. |
| Enhanced Product Qualification | Qualified to AQEC standard with controlled baseline, single fab/assembly site, and military temp range (−55°C to +125°C). |
| Low Headroom Operation | 500 mV dropout enables use with Li-ion (3.0 V min) and regulated 3.3 V rails without additional LDO overhead. |
| Trimmable Output | ±0.5% adjustment via external resistor network preserves initial accuracy, drift, and noise specs across full trim range. |
| High PSRR | −80 dB ripple rejection at 1 kHz - suppresses switching regulator noise in mixed-power-supply systems. |
Applications
| Avionics Reference | Military Data Acquisition |
|---|---|
Use Scenario: Reference for 24-bit sigma-delta ADCs in flight control sensor signal conditioning modules. IC Role / Device Role / Timing Role: Primary voltage reference establishing absolute scale for inertial measurement unit (IMU) analog inputs. Use Value: 5 ppm/°C drift and 1.2 µV p-p noise ensure <0.001% full-scale error across −55°C to +125°C operating envelope. | Use Scenario: Precision reference in portable battlefield spectrum analyzers requiring battery operation and rapid turn-on. IC Role / Device Role / Timing Role: Stable excitation source for high-resolution DACs driving RF calibration waveforms. Use Value: 10 µs turn-on settling and 500 mV dropout allow immediate operation from cold 3.0 V Li-SOCl₂ batteries without startup delay. |
| Unmanned System Telemetry | Precision Instrumentation |
Use Scenario: Reference for multi-channel simultaneous-sampling ADCs in UAV payload environmental monitoring units. IC Role / Device Role / Timing Role: Shared reference across 8-channel 18-bit ADC subsystem to maintain channel-to-channel gain matching. Use Value: ±10 mA sourcing capability drives all eight ADC REF pins directly, eliminating need for buffer amplifiers and reducing board area. | Use Scenario: Calibration reference in handheld metrology tools used for field verification of industrial sensors. IC Role / Device Role / Timing Role: Traceable 2.500 V standard traceable to NIST via factory calibration certificate. Use Value: 50 ppm/1000 hr long-term stability enables annual recalibration intervals without on-site drift correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5 V output, 2 ppm/°C max drift, 0.9 µV p-p noise, but only +10 mA source (no sink), wider SOIC package (R-8 vs. R-8 same footprint). | Used in lab-grade bench instruments where ultra-low drift outweighs sink capability and military temp range. | Select when drift budget is tighter than ±2 ppm/°C and sink current is not required. |
| REF5025MDREP | 2.5 V output, 3 ppm/°C max drift, 1.6 µV p-p noise, −5 mA sink, but rated only to +105°C (not −55°C to +125°C). | Deployed in space-qualified terrestrial infrastructure where radiation tolerance matters more than extended cold operation. | Select when radiation-hardened process is mandatory and −55°C operation is not required. |
Compared with ADR441TRZ-EP-R7, ADR4525BRZ offers lower drift and noise but lacks sinking capability and military temperature support, while REF5025MDREP provides comparable sink current and better radiation tolerance but sacrifices guaranteed operation below −40°C.
Availability
ADR441TRZ-EP-R7 is available at Aetrix Electronics and suitable for avionics, military communication, and unmanned system applications requiring stable component supply, long-lifecycle assurance, and qualified enhanced product traceability.
Supply support for ADR441TRZ-EP-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 Norwood, MA, with design and manufacturing operations worldwide.
The ADR441TRZ-EP-R7 belongs to Analog Devices' Enhanced Product (EP) voltage reference family, engineered specifically for defense, aerospace, and high-reliability industrial applications demanding extended temperature operation and controlled manufacturing baselines.
FAQ
What is the operating temperature range of the ADR441TRZ-EP-R7?
The ADR441TRZ-EP-R7 is specified for continuous operation from −55°C to +125°C, meeting military-grade environmental requirements. This range is validated per AQEC standards and supported by qualification data including thermal cycling, burn-in, and long-term life testing. The ADR441TRZ-EP-R7 maintains its 5 ppm/°C drift and 1.2 µV p-p noise specifications across this full range, making it suitable for deployment in avionics and unmanned vehicle control systems exposed to extreme ambient conditions.
Does the ADR441TRZ-EP-R7 require external capacitors for stability?
Yes, the ADR441TRZ-EP-R7 requires a minimum 0.1 µF ceramic capacitor placed directly at the VOUT pin and a 10 µF bulk capacitor at VIN for stable operation. These values are specified in the datasheet's Typical Application Circuit and validated across temperature and load conditions. Omitting or undersizing the 0.1 µF output capacitor increases noise and can cause oscillation under dynamic loads, while insufficient input capacitance degrades line regulation and ripple rejection performance of the ADR441TRZ-EP-R7.
Can the TRIM pin of the ADR441TRZ-EP-R7 be left unconnected?
No, the TRIM pin of the ADR441TRZ-EP-R7 must be either connected to a voltage divider for output adjustment or tied to GND or VOUT depending on desired trim polarity-leaving it floating risks unpredictable output voltage and increased noise. The datasheet specifies that the TRIM terminal has defined biasing behavior and must be actively terminated; floating operation violates the device's internal feedback configuration and may result in output instability or deviation beyond the ±0.5% trim range. Always terminate the TRIM pin per the ADR441TRZ-EP-R7 application circuit guidelines.
Is the ADR441TRZ-EP-R7 RoHS compliant?
Yes, the ADR441TRZ-EP-R7 is RoHS compliant, as indicated by the "Z" suffix in its ordering code per Analog Devices' Ordering Guide. It meets EU Directive 2011/65/EU and subsequent amendments, with lead-free terminations and exemption-compliant materials. Full compliance documentation-including substance declarations and test reports-is available through Analog Devices' quality portal and applies to all production lots of the ADR441TRZ-EP-R7 shipped after July 2018.
How does the ADR441TRZ-EP-R7 compare to standard commercial-grade ADR441 variants?
The ADR441TRZ-EP-R7 differs from commercial ADR441 variants in three key ways: it is qualified to AQEC standards, manufactured at a single controlled fab/assembly site, and fully specified over −55°C to +125°C (vs. 0°C to +70°C or −40°C to +125°C for commercial versions). These enhancements ensure consistent parametric performance, long-term supply continuity, and traceability required for defense programs-attributes not guaranteed in standard ADR441 devices. The ADR441TRZ-EP-R7 retains identical electrical specs (noise, drift, accuracy) but adds program-level reliability controls absent in non-EP parts.
ADR441TRZ-EP-R7 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.2µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3V ~ 18V
- Current - Supply:
- 3.75mA
- Current - Cathode:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADR441TRZ-EP-R7 FAQ
1.How can I place an order for ADR441TRZ-EP-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR441TRZ-EP-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 ADR441TRZ-EP-R7 reliable?
The price and inventory of ADR441TRZ-EP-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR441TRZ-EP-R7 is usually 5 days.
3.What payment methods are accepted for ADR441TRZ-EP-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR441TRZ-EP-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR441TRZ-EP-R7?
ADR441TRZ-EP-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR441TRZ-EP-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 ADR441TRZ-EP-R7?
For technical support, including ADR441TRZ-EP-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR441TRZ-EP-R7 requirements.
6.How does Aetrix verify that ADR441TRZ-EP-R7 is sourced from the original manufacturer or authorized distributors?
All ADR441TRZ-EP-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 ADR441TRZ-EP-R7 meets industry standards.
7.What is the process for return or replacement of ADR441TRZ-EP-R7?
All ADR441TRZ-EP-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR441TRZ-EP-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 ADR441TRZ-EP-R7 part is unused and in its original packaging.
Return procedure for ADR441TRZ-EP-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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