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Analog Devices Inc. REF195FSZ-REEL
- Part No.:
- REF195FSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF195FSZ-REEL.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:11,429
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Product details
Overview
REF195FSZ-REEL from Analog Devices is a precision micropower low-dropout (LDO) voltage reference IC 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 its output and supports up to 30 mA load current-ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the REF195FSZ-REEL datasheet, REF195FSZ-REEL pinout, REF195FSZ-REEL application, or REF195FSZ-REEL equivalent, key selection criteria include dropout voltage at 10 mA (0.50 V), sleep-mode current (≤15 μA), load regulation (≤4 ppm/mA), and SOIC_N package compatibility with Kelvin-sensing layouts.
Technical Context
The REF195FSZ-REEL uses a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve 5 ppm/°C max TCVO over −40°C to +85°C and 2 ppm/°C typical over −40°C to +125°C. Its SLEEP pin enables TTL/CMOS-compatible shutdown, reducing quiescent current to ≤15 μA while disabling output.
It features short-circuit protection, 1 μF mandatory output bypass capacitance, and load regulation of 4 ppm/mA (E grade) - enabling stable operation under dynamic loads in loop-powered sensor transmitters and solar-harvesting systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 5.00 V - precisely trimmed for direct interface with 5 V ADC references and microcontroller AVDD rails. |
| Initial Accuracy | ±2 mV max (E grade) - ensures <0.04% absolute error without calibration in factory-set measurement systems. |
| Temp Coefficient | 5 ppm/°C max - limits drift to ≤250 μV over 50°C ambient swing, critical for unheated outdoor sensor nodes. |
| Dropout Voltage | 0.50 V at 10 mA - allows operation from 5.5 V supply, enabling use with single-cell LiFePO4 (max 3.65 V) + boost stage or dual-cell alkaline inputs. |
| Supply Current | 45 μA max - supports >10-year battery life in coin-cell–powered IoT endpoints with periodic wake-up sampling. |
| Sleep Current | 15 μA max - reduces standby power by 67% versus active mode, essential for duty-cycled wireless sensor transceivers. |
| Noise (0.1–10 Hz) | 50 μV p-p - maintains ENOB >16 bits in 24-bit delta-sigma ADCs when used as reference source. |
Pinout & Package
The REF195FSZ-REEL is housed in an 8-lead SOIC_N (SOIC-8 narrow-body) package, pin-compatible with industry-standard SOIC-8 footprints and compatible with automated optical inspection (AOI) and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Test Point | Zener-zap trim node - must remain unconnected; no user signal or decoupling allowed. |
| 2 (VS) | Positive Supply Input | Accepts 5.10 V to 15 V input; dropout headroom as low as 0.50 V at 10 mA enables ultra-low-voltage operation. |
| 3 (SLEEP) | Digital Enable/Disable Control | TTL/CMOS-compatible input; logic low disables output and cuts supply current to ≤15 μA. |
| 4 (GND) | Analog Ground Reference | Primary return path for reference output and internal band gap; requires dedicated low-impedance PCB plane. |
| 5 (TP) | Factory Test Point | Second Zener-zap node - left floating per datasheet; not usable for feedback or sensing. |
| 6 (NC) | No Connect | Internally unconnected die bond pad - must be left open or tied to GND per layout best practice. |
| 7 (NC) | No Connect | Internally unconnected die bond pad - no routing or copper pour required. |
| 8 (OUTPUT) | Precision Voltage Output | Delivers regulated 5.00 V; requires 1 μF ceramic capacitor to GND for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-Corrected Band Gap Core | Enables 5 ppm/°C max TCVO across −40°C to +85°C without external compensation components. |
| Laser-Trimmed Thin-Film Resistors | Guarantees ±2 mV initial accuracy without post-package calibration or trimming during production. |
| Low-Dropout Operation (0.50 V @ 10 mA) | Permits direct use with 5.5 V supply rails, eliminating need for pre-regulation in industrial 5 V bus systems. |
| Sleep Mode with TTL/CMOS Interface | Reduces system idle power by >65% in battery-operated data loggers with intermittent sampling intervals. |
| Short-Circuit Protected Output | Withstands indefinite output-to-ground faults without latch-up or parametric shift, improving field reliability. |
Applications
| Portable Instrumentation | ADC/DAC Reference Biasing |
|---|---|
Use Scenario: Handheld multimeters and portable gas analyzers powered by two AA cells (2.4–3.2 V) with boost converter feeding REF195FSZ-REEL. IC Role / Device Role / Timing Role: Primary 5.00 V precision reference for 24-bit sigma-delta ADC front-end and display driver bias rail. Use Value: 5 ppm/°C TCVO and 50 μV p-p noise ensure <0.005% measurement repeatability across 0–40°C operating range. | Use Scenario: Industrial PLC analog input module using REF195FSZ-REEL to bias 16-channel, 18-bit SAR ADC. IC Role / Device Role / Timing Role: Stable reference source for ratiometric conversion, rejecting supply ripple and thermal drift in multiplexed channel sequencing. Use Value: 4 ppm/mA load regulation prevents code shifts during channel switching transients, maintaining ±0.5 LSB linearity. |
| Solar-Powered Remote Sensors | Loop-Powered 4–20 mA Transmitters |
Use Scenario: Wireless soil moisture node harvesting energy from small PV panel (3.0–5.5 V) into supercapacitor buffer, powering REF195FSZ-REEL only during measurement bursts. IC Role / Device Role / Timing Role: Wake-on-demand reference enabling ultra-low-quiescent subsystems with 15 μA sleep current. Use Value: Sleep mode reduces average current to <1 μA over 10-minute sampling interval, extending 100 mAh cell life to >15 years. | Use Scenario: Two-wire 4–20 mA transmitter powered from 12–42 V loop, where REF195FSZ-REEL sets DAC full-scale voltage for current output stage. IC Role / Device Role / Timing Role: High-stability reference defining loop current resolution and zero/span accuracy independent of supply variation. Use Value: 10 ppm/V line regulation ensures <0.05% span error across full 12–42 V compliance range, meeting HART specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3450ARJZ-R7 | Fixed 5.00 V output; 3 ppm/°C max TCVO; 4.5 μA typical supply current; SOT-23-5 package. | Lower power but lower output current (15 mA); no sleep pin; unsuitable for high-current or enable-controlled designs. | Select ADR3450ARJZ-R7 only when board space is constrained and load current ≤15 mA. |
| MAX6126ASA50+T | 5.00 V output; 3 ppm/°C max TCVO; 120 μA supply current; SO-8 package; no sleep function. | Higher quiescent current; superior noise (12 μV p-p); no enable control; better for noise-sensitive audio ADCs. | Choose MAX6126ASA50+T when ultra-low noise dominates over power budget and enable functionality is unnecessary. |
Compared with REF195FSZ-REEL, ADR3450ARJZ-R7 offers lower TCVO and smaller footprint but sacrifices 30 mA drive capability and sleep control; MAX6126ASA50+T delivers lower noise and tighter TCVO yet consumes >2.6× more supply current and lacks shutdown - making REF195FSZ-REEL optimal for battery-powered, high-current, enable-driven precision systems.
Availability
REF195FSZ-REEL is available at Aetrix Electronics and suitable for portable instrumentation, loop-powered transmitters, solar-harvesting sensors, and high-resolution data acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for REF195FSZ-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, serving industrial, automotive, communications, and healthcare markets.
The REF19x series was designed specifically for micropower, low-dropout precision reference applications in battery-operated and thermally demanding environments - emphasizing initial accuracy, temperature stability, and sleep-mode efficiency without external components.
FAQ
What is the maximum load current supported by the REF195FSZ-REEL?
The REF195FSZ-REEL supports up to 30 mA of continuous output current while maintaining specified accuracy and regulation performance. This capability enables direct driving of multiple ADC reference inputs, DAC bias rails, or low-power microcontroller analog sections without external buffering - a key advantage over lower-current alternatives like the ADR3450ARJZ-R7.
Does the REF195FSZ-REEL require an output capacitor, and if so, what value and type?
Yes, the REF195FSZ-REEL requires a minimum 1 μF ceramic capacitor connected between the OUTPUT pin and GND for stability and noise reduction. The datasheet specifies this as mandatory; omitting it risks oscillation or degraded noise performance. X7R or C0G dielectrics are recommended for temperature stability and low ESR.
What is the dropout voltage specification for the REF195FSZ-REEL at 10 mA load current?
The dropout voltage for the REF195FSZ-REEL is 0.50 V at 10 mA load current, measured at VS = 5.50 V. This ultra-low dropout enables operation from supplies as low as 5.5 V - critical for compatibility with boosted single-cell LiFePO₄ sources or tightly regulated 5 V industrial buses where headroom is limited.
How does the SLEEP pin function on the REF195FSZ-REEL, and what is its input threshold?
The SLEEP pin on the REF195FSZ-REEL is a TTL/CMOS-compatible digital control input. A logic low (≤0.8 V) disables the output and reduces supply current to ≤15 μA; a logic high (≥2.4 V) enables normal operation. Input leakage is ≤−8 μA in both states, minimizing impact on upstream GPIO or logic drivers.
Is the REF195FSZ-REEL rated for operation beyond the standard industrial temperature range?
Yes, the REF195FSZ-REEL is fully specified over the extended industrial range of −40°C to +85°C, and its key parameters - including temperature coefficient (2 ppm/°C typical) and load regulation - are characterized up to +125°C. This makes REF195FSZ-REEL suitable for under-hood automotive sensor modules and other high-temperature embedded applications.
REF195FSZ-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:
- Active
- 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
REF195FSZ-REEL FAQ
1.How can I place an order for REF195FSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF195FSZ-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 REF195FSZ-REEL reliable?
The price and inventory of REF195FSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF195FSZ-REEL is usually 5 days.
3.What payment methods are accepted for REF195FSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF195FSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF195FSZ-REEL?
REF195FSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF195FSZ-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 REF195FSZ-REEL?
For technical support, including REF195FSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF195FSZ-REEL requirements.
6.How does Aetrix verify that REF195FSZ-REEL is sourced from the original manufacturer or authorized distributors?
All REF195FSZ-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 REF195FSZ-REEL meets industry standards.
7.What is the process for return or replacement of REF195FSZ-REEL?
All REF195FSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF195FSZ-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 REF195FSZ-REEL part is unused and in its original packaging.
Return procedure for REF195FSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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