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Analog Devices Inc. ADR318ARJZ-REEL7
- Part No.:
- ADR318ARJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADR318ARJZ-REEL7.pdf
- Description:
- IC VREF SERIES PREC 1.8V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,230
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Product details
Overview
ADR318ARJZ-REEL7 from Analog Devices is a precision 1.8 V band gap voltage reference IC with shutdown capability, ±5 mV initial accuracy, 25 ppm/°C max temperature coefficient, and 0.6 V supply headroom-designed for high-accuracy sensing in battery-powered instrumentation and portable medical devices.
For engineers reviewing the ADR318ARJZ-REEL7 datasheet, ADR318ARJZ-REEL7 pinout, ADR318ARJZ-REEL7 application, or ADR318ARJZ-REEL7 equivalent, this page delivers verified specifications, Kelvin-sense-enabled layout guidance, low-power shutdown behavior, and real-world current-source and negative-reference circuit implementations.
Technical Context
The ADR318ARJZ-REEL7 employs patented temperature drift curvature correction to minimize output nonlinearity across 0°C to 70°C. Its dual-output architecture separates VOUT(FORCE) and VOUT(SENSE) pins to enable true 4-wire Kelvin sensing, eliminating trace resistance errors in PCB layouts with thin or long routing.
It operates as a low-dropout (LDV) reference requiring only 600 mV headroom above 1.8 V output, supports up to 5 mA load current, and features TTL/CMOS-compatible shutdown logic with <3 μA quiescent current in disabled state-making it suitable for intermittent-duty, energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.800 V nominal; stable over 0°C to 70°C with ±5 mV absolute error at 25°C. |
| Temp Coefficient | ≤25 ppm/°C; ensures ≤45 ppm total drift across full industrial range (0–70°C). |
| Supply Headroom | 600 mV minimum; enables operation from 2.4 V supply in compact battery systems. |
| Quiescent Current | 120 μA max; supports multi-year operation on coin-cell batteries in standby mode. |
| Shutdown Current | <3 μA max; reduces system power budget during sleep cycles without external switches. |
| Load Regulation | 100 ppm/mA; maintains stability under dynamic loads up to 5 mA without external compensation. |
| Voltage Noise | 5 μV p-p (0.1–10 Hz); critical for high-resolution ADC biasing and precision sensor excitation. |
Pinout & Package
ADR318ARJZ-REEL7 is housed in a RoHS-compliant 5-lead SOT-23 package (JEDEC MO-178-AA, package option RJ-5), with 1.30 mm height and 2.90 mm × 1.60 mm footprint-optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Shutdown control input | TTL/CMOS-compatible logic pin; drives device into high-Z output state when pulled ≤0.8 V. |
| 2 - VIN | Positive supply input | Accepts 2.4 V to 15 V; supplies internal bandgap core and output buffer. |
| 3 - VOUT(SENSE) | Kelvin sense return | Connects directly to load-side ground reference point to eliminate trace IR drop error. |
| 4 - VOUT(FORCE) | Output drive source | Delivers regulated 1.8 V to load; used with VOUT(SENSE) for 4-wire precision regulation. |
| 5 - GND | Analog ground reference | Internal substrate reference; must be tied to clean system ground near load return path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output Kelvin sensing | VOUT(FORCE) and VOUT(SENSE) pins enable true 4-wire measurement, removing PCB trace resistance impact on reference accuracy. |
| Patented curvature correction | Reduces temperature-induced nonlinearity, achieving ≤25 ppm/°C TC without external trimming components. |
| Low-headroom LDV operation | Operates with only 600 mV overhead, enabling direct use with single Li-ion (3.0–4.2 V) or two alkaline cells (2.4–3.2 V). |
| Integrated shutdown logic | Eliminates need for external MOSFET switch; reduces BOM count and layout complexity in duty-cycled systems. |
| High PSRR & low noise | 85 dB ripple rejection at 60 Hz and 5 μV p-p (0.1–10 Hz) noise support 16-bit+ data acquisition without post-filtering. |
Applications
| Battery-Powered Instrumentation | Portable Medical Instruments |
|---|---|
Use Scenario: Handheld multimeter using 24-bit sigma-delta ADC for sub-microvolt resolution measurements. IC Role / Device Role / Timing Role: Precision 1.8 V reference for ADC voltage scaling and sensor excitation biasing. Use Value: ±5 mV initial accuracy and 25 ppm/°C TC ensure calibrated accuracy remains within spec across field operating temperatures without recalibration. | Use Scenario: Wearable ECG monitor with ultra-low-power sleep/wake cycling. IC Role / Device Role / Timing Role: Stable reference for analog front-end gain stages and ADC reference during active sensing bursts. Use Value: <3 μA shutdown current extends battery life by >3× versus non-shutdown references during 95% idle time. |
| Data Acquisition Systems | Fault Protection Critical Systems |
Use Scenario: Industrial 8-channel RTD transmitter with cold-junction compensation. IC Role / Device Role / Timing Role: Primary reference for ratiometric excitation current generation and ADC reference in isolated signal chain. Use Value: VOUT(SENSE)/VOUT(FORCE) separation eliminates 10–50 mΩ PCB trace resistance error, preserving 0.1°C RTD resolution. | Use Scenario: Redundant power monitor in aerospace avionics detecting undervoltage/fault conditions. IC Role / Device Role / Timing Role: Reference for comparator threshold setting in dual-redundant voltage supervision circuits. Use Value: Long-term stability of 50 ppm/1000 hours ensures threshold drift remains below fault detection hysteresis window over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AASA+T | 1.8 V output, ±0.06% initial accuracy, 3 ppm/°C TC, but no shutdown or Kelvin sense pins. | Lacks integrated shutdown and force/sense outputs; requires external switch and careful layout for equivalent accuracy. | Choose when ultra-low TC dominates over power cycling and PCB layout flexibility. |
| REF3018AIDBZR | 1.8 V output, ±0.2% initial accuracy, 50 ppm/°C TC, no shutdown, SOT-23-3 package. | Single-output, no Kelvin sensing; limited to low-precision, fixed-supply applications without dynamic load variation. | Choose for cost-sensitive, non-battery, non-critical accuracy applications where size is primary constraint. |
Compared with MAX6126AASA+T and REF3018AIDBZR, the ADR318ARJZ-REEL7 uniquely combines shutdown, Kelvin sensing, and industrial-grade TC in one SOT-23-5 package-enabling accurate, low-power, layout-resilient reference design without added components or board area.
Availability
ADR318ARJZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical instruments, and data acquisition systems requiring stable component supply with guaranteed long-term sourcing and Pb-free compliance.
Supply support for ADR318ARJZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial, and medical markets since 1965.
The ADR318 series belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding low drift, low power, and layout-insensitive accuracy in portable and battery-operated systems.
FAQ
What is the maximum load current supported by the ADR318ARJZ-REEL7?
The ADR318ARJZ-REEL7 supports up to 5 mA of continuous output current while maintaining specified accuracy and thermal performance. This is confirmed in the Electrical Characteristics table (Table 1) under "Output Current" and validated across load regulation testing from 0 mA to 5 mA at multiple temperatures and input voltages. Exceeding 5 mA may degrade output voltage accuracy and increase junction temperature beyond safe limits.
How does the VOUT(SENSE) pin improve accuracy in PCB layouts?
The VOUT(SENSE) pin on the ADR318ARJZ-REEL7 enables true Kelvin (4-wire) sensing by separating the feedback path from the output drive path. When connected directly to the load-side ground reference point-bypassing PCB trace resistance-the internal error amplifier regulates VOUT(FORCE) to maintain exact 1.8 V at the load, eliminating IR drop errors that would otherwise cause up to 100 ppm/mA load regulation error in standard 2-wire configurations.
What logic levels are required to activate shutdown on the ADR318ARJZ-REEL7?
To place the ADR318ARJZ-REEL7 into shutdown mode, the SHDN pin must be driven to a logic low ≤0.8 V (VINL). A logic high ≥2.4 V (VINH) enables normal operation. These thresholds are TTL/CMOS compatible and specified in Table 1 under "Shutdown Logic Low" and "Shutdown Logic High." If unused, SHDN must be tied to VIN to prevent floating-state instability.
Can the ADR318ARJZ-REEL7 drive capacitive loads, and what is the recommended output capacitor?
Yes, the ADR318ARJZ-REEL7 is stable driving capacitive loads from 0 μF to 10 μF. While not required for stability, a 0.1 μF ceramic capacitor placed directly at the VOUT(FORCE) pin is recommended to absorb transient charge demands from dynamic loads-improving load transient response and reducing output voltage droop during rapid current steps, as shown in Figures 11–13 of the datasheet.
Is the ADR318ARJZ-REEL7 RoHS-compliant and lead-free?
Yes, the ADR318ARJZ-REEL7 is RoHS-compliant and lead-free, as indicated by the "Z" suffix in the part number per Analog Devices' ordering guide. It uses Pb-free die attach, leadframe, and molding compound, and meets JEDEC J-STD-020 moisture sensitivity level 1 requirements. The "Z" branding (L28) and "Pb-free part" footnote in the Ordering Guide confirm full compliance with EU RoHS Directive 2011/65/EU.
ADR318ARJZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADR318ARJZ-REEL7 FAQ
1.How can I place an order for ADR318ARJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR318ARJZ-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 ADR318ARJZ-REEL7 reliable?
The price and inventory of ADR318ARJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR318ARJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR318ARJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR318ARJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR318ARJZ-REEL7?
ADR318ARJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR318ARJZ-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 ADR318ARJZ-REEL7?
For technical support, including ADR318ARJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR318ARJZ-REEL7 requirements.
6.How does Aetrix verify that ADR318ARJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR318ARJZ-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 ADR318ARJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR318ARJZ-REEL7?
All ADR318ARJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR318ARJZ-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 ADR318ARJZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR318ARJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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