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Analog Devices Inc. REF195FS-REEL
- Part No.:
- REF195FS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF195FS-REEL.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,004
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Product details
Overview
REF195FS-REEL from Analog Devices is a precision micropower low-dropout (LDO) voltage reference delivering a stable 5.00 V output with ±2 mV initial accuracy, 5 ppm/°C max temperature coefficient, and 45 μA max supply current. It operates from supplies as low as 100 mV above output voltage and supports up to 30 mA load current-ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the REF195FS-REEL datasheet, REF195FS-REEL pinout, REF195FS-REEL application, or REF195FS-REEL equivalent, key selection considerations include its sleep-mode capability (15 μA), 0.5 V dropout at 10 mA, 50 μVp-p (0.1–10 Hz) output noise, and SOIC_N-8 package compatibility with Kelvin-sensing layouts in loop-powered sensor systems.
Technical Context
The REF195FS-REEL uses a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve 5 ppm/°C max TC over −40°C to +85°C and 2 ppm/°C typical TC over −40°C to +125°C. Its internal sleep control circuit disables output and reduces quiescent current to ≤15 μA when the SLEEP pin is driven low (≤0.8 V).
Dropout voltage is specified at 0.50 V (VS = 5.50 V, ILOAD = 10 mA) and 1.30 V (VS = 6.30 V, ILOAD = 30 mA), enabling operation from ultra-low headroom supplies. Load regulation is 2–4 ppm/mA and line regulation is 2–4 ppm/V (E grade, 25°C), both including self-heating effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 5.00 V - precisely trimmed for direct use with 5 V ADCs, DACs, and microcontroller analog peripherals. |
| Initial Accuracy | ±2 mV maximum (E grade) - enables 16-bit system accuracy without post-calibration in factory-set instruments. |
| Temperature Coefficient | 5 ppm/°C max (−40°C to +85°C) - ensures <±0.5 mV drift across industrial temperature range. |
| Supply Current | 45 μA max (active), 15 μA max (sleep) - extends battery life in solar- or loop-powered field sensors. |
| Dropout Voltage | 0.50 V at 10 mA - allows operation from 5.5 V supply in energy-constrained 5 V systems. |
| Output Noise | 50 μVp-p (0.1–10 Hz) - minimizes quantization uncertainty in high-resolution data acquisition. |
| Load Regulation | 2 ppm/mA (E grade, 25°C) - maintains stability under dynamic load changes in smart sensor transmitters. |
Pinout & Package
REF195FS-REEL is supplied in an 8-lead SOIC_N (SOIC-8 narrow-body) package, pin-compatible with industry-standard SOIC-8 footprints and compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory test point | Reserved for Zener-zap trimming; must remain unconnected in end application. |
| 2 (VS) | Positive supply input | Accepts 5.10–15 V; minimum headroom 0.50 V at 10 mA load. |
| 3 (SLEEP) | Digital enable/disable control | TTL/CMOS-compatible; low (≤0.8 V) disables output and reduces IQ to ≤15 μA. |
| 4 (GND) | Analog ground reference | Primary return path; requires low-impedance connection to system ground plane. |
| 5 (TP) | Factory test point | Reserved for Zener-zap trimming; must remain unconnected in end application. |
| 6 (NC) | No connect | Internally unused; leave floating per datasheet guidance. |
| 7 (NC) | No connect | Internally unused; leave floating per datasheet guidance. |
| 8 (OUTPUT) | Precision 5.00 V output | Requires 1 μF ceramic bypass capacitor to GND for stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected band gap core | Enables 5 ppm/°C max TC without external compensation components. |
| Sleep mode with TTL/CMOS interface | Reduces supply current to ≤15 μA while preserving fast wake-up (<10 μs) for duty-cycled sensing. |
| Laser-trimmed thin-film resistors | Guarantees ±2 mV initial accuracy and long-term stability of 1.2 mV/1000 h @ 125°C. |
| Low-noise 50 μVp-p output | Supports 16+ bit resolution in precision data converters without additional filtering. |
| Short-circuit protected output | Withstands indefinite output short to GND without damage or parameter shift. |
Applications
| Portable Instrumentation | High-Resolution Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeters and portable gas analyzers powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Primary 5 V reference for SAR ADCs and LCD bias generation. Use Value: 45 μA quiescent current and 0.5 V dropout extend runtime; ±2 mV accuracy eliminates field calibration. |
Use Scenario: Industrial process monitors acquiring 16-bit sensor data at 10 kSPS with low thermal drift. IC Role / Device Role / Timing Role: Stable 5.00 V reference for dual-slope or sigma-delta ADC front-ends. Use Value: 5 ppm/°C TC and 50 μVp-p noise ensure <±1 LSB error across temperature and time. |
| Solar-Powered Remote Sensors | Loop-Powered Transmitters |
|
Use Scenario: Wireless environmental nodes harvesting energy from small PV panels with variable 4–6 V output. IC Role / Device Role / Timing Role: Low-headroom 5 V reference enabling direct conversion of weak sensor signals. Use Value: 0.5 V dropout allows operation down to 5.5 V input; sleep mode cuts idle power to 15 μA. |
Use Scenario: 4–20 mA current-loop transmitters in hazardous areas where power is limited to 3.5–4.5 V. IC Role / Device Role / Timing Role: Precision 5 V reference for op-amp signal conditioning and current-sense amplifiers. Use Value: Load regulation of 2 ppm/mA ensures stable reference despite varying loop current draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4550BRZ-R7 | 5.0 V, 3 ppm/°C max TC, 950 μA supply current, 300 mV dropout, SOIC-8 | Higher power, lower TC; suited for lab-grade equipment, not battery-operated devices | Select ADR4550BRZ-R7 only if ultra-low TC outweighs 21× higher quiescent current. |
| MAX6126AASA50+ | 5.0 V, 6 ppm/°C max TC, 120 μA supply current, 300 mV dropout, SOIC-8 | Higher IQ, slightly higher TC; includes integrated output buffer for driving heavy capacitive loads | Choose MAX6126AASA50+ when driving >1 nF bypass capacitance or requiring rail-to-rail output drive. |
Compared with REF195FS-REEL, ADR4550BRZ-R7 offers superior temperature stability but consumes 21× more current-making it unsuitable for portable or energy-harvesting designs. MAX6126AASA50+ adds output buffering at the cost of higher quiescent current and marginally worse TC, trading micropower efficiency for drive strength.
Availability
REF195FS-REEL is available at Aetrix Electronics and suitable for portable instrumentation, high-resolution data acquisition, and loop-powered transmitter designs requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for REF195FS-REEL 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, headquartered in Norwood, MA.
The REF19x series was designed specifically for micropower, low-dropout precision voltage referencing in space- and energy-constrained industrial and portable systems-emphasizing TC stability, sleep-mode efficiency, and robustness across extended temperature ranges.
FAQ
What is the maximum load current supported by the REF195FS-REEL?
The REF195FS-REEL delivers up to 30 mA of continuous output current while maintaining specified accuracy and regulation performance. At 30 mA, dropout voltage rises to 1.30 V (VS = 6.30 V), and load regulation remains within 4 ppm/mA for E-grade units at 25°C. This makes REF195FS-REEL suitable for driving ADC references, op-amp bias networks, and small logic rails without external buffers.
Does the REF195FS-REEL require an output capacitor, and if so, what value and type?
Yes, the REF195FS-REEL requires a 1 μF ceramic capacitor connected between the OUTPUT and GND pins for stability and noise reduction. The datasheet specifies this as mandatory for proper operation. X7R or C0G dielectrics are recommended; tantalum or electrolytic capacitors are not advised due to ESR and aging effects. Placement should be within 5 mm of the device pins to minimize parasitic inductance.
How does sleep mode affect the output voltage and wake-up time of the REF195FS-REEL?
In sleep mode (SLEEP pin ≤0.8 V), the REF195FS-REEL disables its output stage and reduces supply current to ≤15 μA; output voltage drops to near 0 V with no sourcing capability. Wake-up time-the interval from SLEEP rising above 2.4 V to output settling within ±0.5 mV of 5.00 V-is typically <10 μs. This behavior is fully characterized and guaranteed across −40°C to +85°C for REF195FS-REEL.
Can the REF195FS-REEL be used in automotive applications?
The REF195FS-REEL is specified over the extended industrial temperature range (−40°C to +85°C) with typical performance validated to +125°C, making it suitable for under-hood and cabin automotive subsystems such as battery monitoring, sensor interfaces, and infotainment power management. However, it is not AEC-Q200 qualified; for mission-critical automotive applications, consult Analog Devices' automotive-grade alternatives like the ADR445 or ADR4550 with full qualification documentation.
What is the long-term stability specification for the REF195FS-REEL, and how is it measured?
The REF195FS-REEL exhibits 1.2 mV maximum long-term stability after 1000 hours of operation at 125°C-measured as noncumulative output voltage drift under accelerated life testing. This specification reflects worst-case drift in the first 1000-hour period; subsequent periods show significantly lower drift. The value applies to all grades (E/F/G) and is verified per JEDEC JESD22-A108 methodology, ensuring predictable aging behavior in high-reliability instrumentation.
REF195FS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF19
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 50µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 5.1V ~ 15V
- Current - Supply:
- 45µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF195FS-REEL FAQ
1.How can I place an order for REF195FS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF195FS-REEL 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 REF195FS-REEL reliable?
The price and inventory of REF195FS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF195FS-REEL is usually 5 days.
3.What payment methods are accepted for REF195FS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF195FS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF195FS-REEL?
REF195FS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF195FS-REEL 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 REF195FS-REEL?
For technical support, including REF195FS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF195FS-REEL requirements.
6.How does Aetrix verify that REF195FS-REEL is sourced from the original manufacturer or authorized distributors?
All REF195FS-REEL 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 REF195FS-REEL meets industry standards.
7.What is the process for return or replacement of REF195FS-REEL?
All REF195FS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF195FS-REEL, 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 REF195FS-REEL part is unused and in its original packaging.
Return procedure for REF195FS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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