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Analog Devices Inc. ADR441ARMZ-REEL7
- Part No.:
- ADR441ARMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADR441ARMZ-REEL7.pdf
- Description:
- IC VREF SERIES 0.12% 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
ADR441ARMZ-REEL7 from Analog Devices is an ultralow-noise, low-dropout XFET® voltage reference delivering 2.500 V output with ±1 mV initial accuracy (B grade), 3 ppm/°C temperature coefficient, and 1.2 µV p-p (0.1 Hz to 10 Hz) noise. It sources +10 mA and sinks −5 mA, operates from 4 V to 18 V input, and is used in high-resolution ADC biasing and precision medical sensor signal chains.
For engineers reviewing the ADR441ARMZ-REEL7 datasheet, ADR441ARMZ-REEL7 pinout, ADR441ARMZ-REEL7 application, or ADR441ARMZ-REEL7 equivalent, key selection criteria include ultralow 1.2 µV p-p noise, 3 ppm/°C drift over −40°C to +125°C, 500 mV dropout headroom, trim-adjustable output, and MSOP-8 packaging for space-constrained instrumentation layouts.
Technical Context
The ADR441ARMZ-REEL7 implements XFET® technology-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 to achieve <3 ppm/°C drift. Its noise performance stems from minimal correction circuitry versus bandgap references.
It supports bidirectional load current (±10 mA / ∓5 mA), includes a dedicated TRIM pin for ±0.5% output adjustment without degrading stability or noise, and maintains regulation down to 500 mV supply headroom-enabling use with low-voltage rails in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±1 mV (B grade); enables direct interface with 2.5 V ADC reference inputs without scaling. |
| Temperature Coefficient | 3 ppm/°C (−40°C to +125°C); ensures ≤0.75 mV total drift across full industrial range. |
| Voltage Noise | 1.2 µV p-p (0.1 Hz–10 Hz); critical for 20+ bit SAR and delta-sigma converter accuracy. |
| Dropout Voltage | 500 mV; allows operation from 3.0 V rail when output is 2.5 V, supporting single-cell Li-ion or 3.3 V system designs. |
| Output Current | +10 mA source / −5 mA sink; drives ADC reference buffers, DAC bias networks, and small op-amp stages directly. |
| Initial Accuracy | ±1 mV (0.04%); reduces calibration burden in factory-trimmed test equipment and portable instruments. |
| Long-Term Stability | 50 ppm (1000 hrs); supports >1-year uncalibrated operation in field-deployed monitoring systems. |
Pinout & Package
ADR441ARMZ-REEL7 is housed in an 8-lead MSOP (RM suffix) package, 3 mm × 3 mm × 0.85 mm, with exposed pad for thermal enhancement. Pin 1 is 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 0.1 µF ceramic bypass capacitor to GND for stability. |
| 3, 7 | NIC | No internal connection; may be left floating or tied to GND for mechanical rigidity only. |
| 4 | GND | Analog ground reference; must connect to low-impedance system ground plane. |
| 5 | TRIM | Adjusts output voltage ±0.5% via external resistor divider; no loading during normal operation. |
| 6 | VOUT | Stable 2.500 V reference output; requires 0.1 µF ceramic capacitor to GND for noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| XFET® Reference Core | Delivers lower noise and better thermal hysteresis than buried Zener or bandgap alternatives. |
| Trim-Adjustable Output | Enables fine-tuning of VOUT over ±0.5% without sacrificing noise or drift performance. |
| Bidirectional Output Drive | Sources 10 mA and sinks 5 mA-supports active biasing and feedback configurations in precision analog front-ends. |
| Low Dropout Operation | Regulates with only 500 mV VIN–VOUT margin, enabling compatibility with 3.0 V logic rails and battery discharge profiles. |
| Extended Temperature Range | Specified from −40°C to +125°C-suitable for under-hood automotive sensors and industrial PLC modules. |
Applications
| High-Resolution Data Acquisition | Precision Medical Instrumentation |
|---|---|
Use Scenario: 24-bit delta-sigma ADC in portable ECG monitor requiring stable, low-noise reference for sub-microvolt signal fidelity. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core and PGA bias network. Use Value: 1.2 µV p-p noise ensures <0.5 LSB noise contribution at 2.5 V full-scale, preserving effective resolution. | Use Scenario: Battery-powered blood glucose meter with integrated electrochemical sensor and low-power microcontroller. IC Role / Device Role / Timing Role: Precision reference for sensor excitation and ADC measurement path. Use Value: 3 ppm/°C drift limits error to <10 µV over body-temperature range (30°C–40°C), improving assay accuracy. |
| Industrial Process Control | Optical Network Monitoring |
Use Scenario: Loop-powered 4–20 mA transmitter in hazardous area with ambient temperature swings from −40°C to +85°C. IC Role / Device Role / Timing Role: Stable reference for DAC output stage and current-sense amplifier calibration. Use Value: 500 mV dropout allows operation from 12 V loop supply while maintaining 2.5 V reference, even at end-of-life battery voltage. | Use Scenario: Optical transceiver module requiring precise bias control for laser diode drivers and TIA gain setting. IC Role / Device Role / Timing Role: Reference for programmable current sources and gain-setting DACs in analog front-end. Use Value: ±1 mV initial accuracy eliminates per-unit calibration, reducing manufacturing test time and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRMZ-REEL7 | 2.5 V output, 0.9 µV p-p noise, 2 ppm/°C drift, 400 mV dropout, but only +5 mA source / −1 mA sink. | Better noise/drift, lower drive capability; unsuitable for high-current reference buffer loads. | Select if ultra-low noise dominates over output drive requirements. |
| REF5025AIDR | 2.5 V output, 3 µV p-p noise, 3 ppm/°C drift, 600 mV dropout, +10 mA / −10 mA drive, SOIC-8 package. | Higher noise, same drift, higher dropout, symmetric sink/source; larger footprint than MSOP-8. | Select if dual-symmetric current drive is required and board area permits SOIC-8. |
Compared with ADR441ARMZ-REEL7, ADR4525BRMZ-REEL7 offers superior noise and drift but half the sink current, while REF5025AIDR provides equal source/sink drive and SOIC compatibility at the cost of higher noise and larger size-making ADR441ARMZ-REEL7 optimal for compact, high-precision, bidirectionally loaded reference designs.
Availability
ADR441ARMZ-REEL7 is available at Aetrix Electronics and suitable for precision data acquisition systems, portable medical instruments, and industrial process control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADR441ARMZ-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 ultraprecise, low-noise voltage referencing in high-resolution data converters and portable instrumentation-leveraging XFET® technology to surpass traditional bandgap and buried Zener performance.
FAQ
What is the guaranteed initial accuracy of ADR441ARMZ-REEL7 over temperature?
The ADR441ARMZ-REEL7 is specified as a B-grade device with ±1 mV (0.04%) initial accuracy at 25°C and a maximum temperature coefficient of 3 ppm/°C over −40°C to +125°C. This yields a worst-case total error of ±1.15 mV across the full temperature range, including initial tolerance and drift.
Can ADR441ARMZ-REEL7 be used with a 3.0 V supply rail?
No-ADR441ARMZ-REEL7 requires a minimum input voltage of 4.0 V (VOUT + 500 mV headroom). With a 2.500 V output, the absolute minimum VIN is 3.0 V, but the datasheet specifies 4.0 V as the lower limit for guaranteed operation across temperature and load. Using 3.0 V risks dropout and regulation loss.
How does the TRIM pin on ADR441ARMZ-REEL7 function in practice?
The TRIM pin allows adjustment of the output voltage over ±0.5% using an external resistor divider between VOUT and GND, with the wiper connected to TRIM. Adjustment does not degrade noise, drift, or long-term stability-verified in the datasheet's Applications Information section-and requires no recalibration after trimming.
Is ADR441ARMZ-REEL7 suitable for driving the reference input of a 20-bit SAR ADC?
Yes-ADR441ARMZ-REEL7's 1.2 µV p-p (0.1 Hz–10 Hz) noise contributes <0.5 LSB error at 2.5 V full-scale for a 20-bit (≈2.44 µV/LSB) SAR ADC. Its low output impedance (<1 Ω at DC) and ±10 mA drive ensure stable settling into typical ADC reference input capacitance (10–20 pF) and series resistance.
What is the thermal resistance (θJA) of the MSOP-8 package used by ADR441ARMZ-REEL7?
The ADR441ARMZ-REEL7 in the 8-lead MSOP (RM suffix) package has a junction-to-ambient thermal resistance (θJA) of 132.5°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard PCB layout with recommended copper pour and solder mask defined per Analog Devices' layout guidelines.
ADR441ARMZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- ±0.12%
- Temperature Coefficient:
- 10ppm/°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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ADR441ARMZ-REEL7 FAQ
1.How can I place an order for ADR441ARMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR441ARMZ-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 ADR441ARMZ-REEL7 reliable?
The price and inventory of ADR441ARMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR441ARMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR441ARMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR441ARMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR441ARMZ-REEL7?
ADR441ARMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR441ARMZ-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 ADR441ARMZ-REEL7?
For technical support, including ADR441ARMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR441ARMZ-REEL7 requirements.
6.How does Aetrix verify that ADR441ARMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR441ARMZ-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 ADR441ARMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR441ARMZ-REEL7?
All ADR441ARMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR441ARMZ-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 ADR441ARMZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR441ARMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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