My Inquiry
My Account
Analog Devices Inc. REF195FSZ
- Part No.:
- REF195FSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF195FSZ.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,281
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REF195FSZ from Analog Devices is a precision micropower low-dropout voltage reference delivering 5.00 V ±2 mV initial accuracy, 5 ppm/°C max temperature coefficient, and 45 μA max supply current across −40°C to +85°C. It features sleep mode (15 μA), short-circuit protection, and operates with only 100 mV headroom above output-enabling use in portable instruments and loop-powered sensors.
For engineers reviewing the REF195FSZ datasheet, REF195FSZ pinout, REF195FSZ application, or REF195FSZ equivalent, key selection criteria include dropout voltage at 10 mA (0.50 V), load regulation (2–4 ppm/mA), sleep-mode enable interface, and SOIC_N package compatibility for space-constrained industrial signal chains.
Technical Context
The REF195FSZ uses a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve stable 5.00 V output over temperature. Its architecture integrates a dedicated SLEEP pin (TTL/CMOS-compatible) that disables output and reduces quiescent current to ≤15 μA without external circuitry.
Designed for low-headroom operation, it maintains regulation with input as low as 5.50 V at 10 mA load (500 mV dropout), supports 30 mA output current, and requires only a 1 μF output bypass capacitor for stability per datasheet specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 5.00 V - precisely trimmed for ADC/DAC reference and sensor excitation requiring stable mid-rail bias. |
| Initial Accuracy | ±2 mV max at 25°C - enables 16-bit system accuracy without post-calibration in factory-set instrumentation. |
| Temp Coefficient | 5 ppm/°C max (E grade) - ensures ≤0.75 mV drift over −40°C to +85°C, critical for unheated outdoor sensor nodes. |
| Dropout Voltage | 0.50 V at 10 mA - allows operation from single Li-ion or 5.5 V rail with margin for aging and ripple. |
| Supply Current | 45 μA max - supports >10-year battery life in solar-powered remote data loggers drawing <100 μA average. |
| Sleep Mode Current | 15 μA max - enables ultra-low-power wake-on-event architectures via microcontroller-controlled SLEEP pin assertion. |
| Noise (0.1–10 Hz) | 50 μV p-p - suitable for 16-bit SAR ADCs without additional filtering in precision measurement front-ends. |
Pinout & Package
REF195FSZ 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 assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Test Point | Zener-zap trim point; must remain unconnected in end application to preserve accuracy. |
| 2 (VS) | Positive Supply Input | Accepts 5.10 V to 15 V; minimum 5.50 V required for 10 mA load with 500 mV dropout. |
| 3 (SLEEP) | Digital Enable Control | Active-low TTL/CMOS input; drives output to high-impedance state when logic low (<0.8 V). |
| 4 (GND) | Analog Ground Reference | Return path for output and internal bias; requires low-impedance connection to minimize noise coupling. |
| 5 (TP) | Factory Test Point | Second Zener-zap node; no user connection permitted per datasheet Figure 1 and test pin notes. |
| 6 (NC) | No Connect | Internally unused; must be left floating or tied to GND per PCB layout best practice. |
| 7 (NC) | No Connect | Internally unused; same handling as Pin 6-no routing or termination 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 tempco without external compensation, reducing BOM count in automotive-grade sensor modules. |
| Low-Dropout Operation (500 mV @ 10 mA) | Permits direct regulation from 5.5 V rails-eliminates need for pre-regulator stages in compact IoT edge nodes. |
| Dedicated Sleep Mode Interface | Hardware-controlled power gating cuts supply current to 15 μA, enabling duty-cycled sensing with sub-μA average current. |
| Laser-Trimmed Thin-Film Resistors | Guarantees ±2 mV initial accuracy without calibration, accelerating time-to-market for medical diagnostic equipment. |
| Short-Circuit Protected Output | Withstands indefinite output shorting without damage or parameter shift-critical for field-deployed industrial transmitters. |
Applications
| Portable Instruments | ADCs and DACs |
|---|---|
Use Scenario: Handheld multimeters and battery-operated oscilloscopes requiring stable reference under varying battery voltage and temperature. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit SAR ADCs and display bias generation. Use Value: 5 ppm/°C tempco and 45 μA supply current extend battery life while maintaining measurement repeatability across operating conditions. | Use Scenario: Precision data acquisition systems using 16–18-bit converters in industrial PLC analog input modules. IC Role / Device Role / Timing Role: High-stability reference source for successive-approximation and sigma-delta ADCs. Use Value: 50 μV p-p low-frequency noise and ±2 mV initial accuracy support ENOB >15.5 bits without post-conversion correction. |
| Smart Sensors | Solar Powered Applications |
Use Scenario: Wireless temperature/pressure transmitters powered by energy-harvesting circuits with intermittent 3.6–5.5 V supply. IC Role / Device Role / Timing Role: Excitation and reference source for bridge-based sensors and on-board ADCs. Use Value: 100 mV dropout headroom enables operation during solar panel low-output periods; sleep mode reduces idle current to 15 μA. | Use Scenario: Remote environmental monitoring stations powered by small photovoltaic cells and supercapacitors. IC Role / Device Role / Timing Role: System reference for microcontroller, sensor interface, and RF transceiver voltage domains. Use Value: Micropower operation (45 μA active, 15 μA sleep) and wide input range (5.1–15 V) maximize energy harvesting efficiency and runtime. |
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 | 5.0 V output, 3 ppm/°C max tempco, 4.5 μA typical supply current, SOT-23-5 package. | Lower power but lower output current (15 mA); no sleep mode; smaller footprint. | Choose for ultra-low-power wearable sensors where 15 mA load and minimal board area outweigh need for sleep control. |
| MAX6126AASA50+T | 5.0 V output, 3 ppm/°C max tempco, 120 μA supply current, SO-8 package, no sleep pin. | Higher drive capability (20 mA), better noise (12 μV p-p), but no power-gating feature. | Choose for high-precision lab equipment requiring lowest noise and highest long-term stability, accepting higher quiescent current. |
Compared with ADR3450ARJZ-R7 and MAX6126AASA50+T, REF195FSZ uniquely balances 30 mA output drive, hardware sleep control, and SOIC-8 manufacturability-making it optimal for industrial field instruments needing robustness, moderate power, and design reuse.
Availability
REF195FSZ is available at Aetrix Electronics and suitable for portable instruments, smart sensors, and solar-powered applications requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.
Supply support for REF195FSZ 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 industrial, automotive, communications, and healthcare markets since 1965.
The REF19x series was developed to address demand for micropower, low-dropout voltage references in battery- and energy-harvesting–powered instrumentation-emphasizing accuracy, thermal stability, and ease of integration in space-constrained designs.
FAQ
What is the maximum load current supported by the REF195FSZ?
The REF195FSZ delivers up to 30 mA of continuous output current while maintaining specified accuracy and regulation. At 30 mA load, dropout voltage rises to 1.30 V (e.g., 6.30 V input required for 5.00 V output), and load regulation remains within 2–4 ppm/mA for E grade-ensuring stable reference performance in current-sinking sensor interfaces and multi-channel data acquisition systems using REF195FSZ.
Does the REF195FSZ require an output capacitor, and if so, what value and type?
Yes, the REF195FSZ requires a 1 μF ceramic capacitor connected between the OUTPUT (Pin 8) and GND (Pin 4) for stability and noise reduction, as explicitly mandated in the datasheet's Applications Information section. X7R or C0G dielectrics are recommended; tantalum or electrolytic capacitors are not advised due to ESR and aging effects that may degrade transient response and long-term accuracy of REF195FSZ.
How does the SLEEP pin function on the REF195FSZ, and what are its voltage thresholds?
The SLEEP pin (Pin 3) is an active-low TTL/CMOS-compatible control input: logic low (<0.8 V) disables the output and reduces supply current to ≤15 μA, while logic high (>2.4 V) enables normal operation at ≤45 μA. Input leakage is ≤−8 μA in both states. This hardware-controlled sleep mode allows deterministic power gating in microcontroller-based systems without firmware overhead-critical for extending battery life in devices using REF195FSZ.
What is the guaranteed temperature coefficient for the REF195FSZ over −40°C to +85°C?
The REF195FSZ E grade guarantees a maximum temperature coefficient of 5 ppm/°C over the extended industrial temperature range of −40°C to +85°C, corresponding to a total output drift of ≤0.75 mV across that range. This spec is verified per Table 15 in the Rev. L datasheet and applies specifically to the REF195FSZ part number-not inferred from other REF19x variants-ensuring predictable performance in unheated outdoor enclosures and automotive under-hood environments.
Is the REF195FSZ pin-compatible with other members of the REF19x family, such as REF192FSZ or REF196FSZ?
Yes, all REF19x series devices-including REF195FSZ, REF192FSZ, and REF196FSZ-share identical 8-lead SOIC_N (S suffix) pinouts per Figures 1 and 2 of the datasheet. Pin functions (VS, SLEEP, GND, OUTPUT, TP, NC) and physical layout are fully interchangeable, enabling reference voltage scaling (2.5 V, 3.3 V, 5.0 V) without PCB redesign-provided the input supply and load requirements of each variant are met in the target application using REF195FSZ.
REF195FSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF19
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for REF195FSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF195FSZ 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 reliable?
The price and inventory of REF195FSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF195FSZ is usually 5 days.
3.What payment methods are accepted for REF195FSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF195FSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF195FSZ?
REF195FSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF195FSZ 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?
For technical support, including REF195FSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF195FSZ requirements.
6.How does Aetrix verify that REF195FSZ is sourced from the original manufacturer or authorized distributors?
All REF195FSZ 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 meets industry standards.
7.What is the process for return or replacement of REF195FSZ?
All REF195FSZ units undergo pre-shipment inspection (PSI). If there is an issue with REF195FSZ, 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 part is unused and in its original packaging.
Return procedure for REF195FSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF195FSZ Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
