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Analog Devices Inc. REF195ES-REEL
- Part No.:
- REF195ES-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF195ES-REEL.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,192
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Product details
Overview
REF195ES-REEL from Analog Devices is a precision micropower low-dropout (LDV) 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-designed for high-accuracy ADC/DAC biasing in portable and solar-powered instrumentation.
For engineers reviewing the REF195ES-REEL datasheet, REF195ES-REEL pinout, REF195ES-REEL application, or REF195ES-REEL equivalent, key selection criteria include dropout voltage ≤0.50 V at 10 mA load, sleep-mode current ≤15 μA, and guaranteed operation across −40°C to +85°C industrial temperature range.
Technical Context
The REF195ES-REEL employs a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve ultra-low drift and high initial accuracy. Its LDV architecture enables regulation from supplies as low as 100 mV above the 5.00 V output, supporting battery-constrained systems.
Sleep mode is controlled via a dedicated TTL/CMOS-compatible SLEEP pin (Pin 3), reducing quiescent current to ≤15 μA while disabling output-critical for intermittent-power sensor nodes and loop-powered transmitters where standby power must be minimized without external switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 5.00 V - precisely trimmed for direct interface with 5 V ADCs, DACs, and microcontroller analog peripherals. |
| Initial Accuracy | ±2 mV max at 25°C - ensures <0.04% full-scale error before calibration in 12-bit+ data converters. |
| Temp Coefficient | 5 ppm/°C max over −40°C to +85°C - contributes ≤0.25 mV drift across full industrial range. |
| Dropout Voltage | 0.50 V max at 10 mA load - allows operation from 5.5 V supply, enabling single-cell Li-ion or dual-cell alkaline input. |
| Supply Current | 45 μA max active / 15 μA max sleep - supports >1-year battery life in 10 μA-average-power IoT sensors. |
| Load Regulation | 4 ppm/mA max - maintains output stability under dynamic load changes typical in multiplexed sensor front-ends. |
| Noise (0.1–10 Hz) | 50 μV p-p - low enough to avoid degrading ENOB in 16-bit SAR ADCs without additional filtering. |
Pinout & Package
REF195ES-REEL is supplied in an 8-lead SOIC_N (SOIC-8) package (S suffix), with exposed pad not electrically connected. Pin 1 and Pin 5 are factory test points (TP) and must remain unconnected in circuit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Test Point | Zener-zap trimming node; no user connection-floating prevents accuracy degradation. |
| 2 (VS) | Positive Supply Input | Accepts 5.10–15 V input; dropout headroom as low as 0.50 V enables efficient low-voltage operation. |
| 3 (SLEEP) | Digital Sleep Control | TTL/CMOS-compatible enable; low = output disabled, current ≤15 μA; high = normal operation. |
| 4 (GND) | Analog Ground Reference | Primary return path for reference output and internal bias; requires low-impedance Kelvin connection to output capacitor. |
| 5 (TP) | Factory Test Point | Second Zener-zap node; must remain unconnected to preserve output voltage trim integrity. |
| 6 (NC) | No Connect | Internally unused; leave floating-no routing or grounding permitted. |
| 7 (NC) | No Connect | Internally unused; leave floating-no routing or grounding permitted. |
| 8 (OUTPUT) | Precision Voltage Output | 5.00 V regulated output; requires 1 μF ceramic bypass capacitor to GND (Pin 4) for stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-Corrected Band Gap Core | Enables 5 ppm/°C max TCVO by compensating second-order thermal drift-critical for wide-temperature industrial sensors. |
| Laser-Trimmed Thin-Film Resistors | Delivers ±2 mV initial accuracy without post-package calibration, reducing test cost and improving yield consistency. |
| Low-Dropout Architecture (LDV) | Regulates from 5.5 V supply at 10 mA load, enabling use with aging batteries or low-headroom LDOs upstream. |
| Dedicated Sleep Mode Control | Reduces supply current to ≤15 μA while maintaining fast wake-up (<10 μs), ideal for duty-cycled measurement systems. |
| Short-Circuit Protected Output | Withstands indefinite output-to-ground faults without damage or parameter shift-enhances field reliability in harsh environments. |
Applications
| Portable Instrumentation | High-Resolution Data Acquisition |
|---|---|
Use Scenario: Handheld multimeters and portable gas analyzers powered by two AA cells with variable voltage decay. IC Role / Device Role / Timing Role: Primary 5.00 V reference for 16-bit sigma-delta ADC and display driver biasing. Use Value: 0.50 V dropout ensures stable reference down to 5.5 V supply, extending usable battery life by >25% versus higher-dropout alternatives. | Use Scenario: Modular DAQ systems with multiplexed sensor inputs requiring simultaneous sampling and low-noise analog front-end. IC Role / Device Role / Timing Role: Precision 5.00 V reference for SAR ADC reference input and PGA gain-setting network. Use Value: 50 μV p-p (0.1–10 Hz) noise and 4 ppm/mA load regulation prevent code flicker and maintain ENOB ≥15.2 bits. |
| Solar-Powered Remote Sensors | Loop-Powered Transmitters |
Use Scenario: Wireless soil moisture nodes using supercapacitor energy storage charged by small photovoltaic panels. IC Role / Device Role / Timing Role: Micropower 5.00 V reference for MCU ADC and RF transceiver bias during intermittent wake cycles. Use Value: 15 μA sleep current minimizes dark-current drain, enabling >6-month operation on 100 mF supercapacitor at 10-min wake interval. | Use Scenario: 4–20 mA current-loop transmitters in hazardous area process control, powered solely from loop current. IC Role / Device Role / Timing Role: Low-dropout 5.00 V reference for signal conditioning and HART modem interface. Use Value: 0.50 V dropout allows operation with only 5.5 V headroom-maximizing available voltage for op-amps and isolators within 24 V loop budget. |
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 | Higher initial accuracy (±0.1%), but 65 μA supply current and no sleep mode; 6-lead SOT-23 package. | Preferred for space-constrained PCBs where ultra-high accuracy outweighs power savings. | Select when board area is critical and sleep functionality is unnecessary. |
| LM4040C50IDBZR | Shunt reference (not series); requires external bias resistor; 100 μA min cathode current; no sleep control. | Suitable for fixed-supply designs with ample margin, but incompatible with low-headroom or sleep-controlled topologies. | Choose only if system topology mandates shunt configuration and supply is stable ≥6.5 V. |
Compared with ADR3450ARJZ-R7 and LM4040C50IDBZR, REF195ES-REEL uniquely balances micropower operation (45 μA), integrated sleep control, and low-dropout capability in an SOIC-8 footprint-making it the optimal choice for battery- or energy-harvesting–powered systems requiring both precision and dynamic power management.
Availability
REF195ES-REEL is available at Aetrix Electronics and suitable for portable instrumentation, high-resolution data acquisition, and solar-powered remote sensing requiring stable component supply with long-term parametric consistency.
Supply support for REF195ES-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 engineered specifically for micropower, low-dropout precision voltage referencing in portable, loop-powered, and automotive-qualified instrumentation-emphasizing stability, accuracy, and ultra-low quiescent current.
FAQ
What is the nominal output voltage of the REF195ES-REEL?
The REF195ES-REEL provides a precisely trimmed nominal output voltage of 5.00 V, verified across temperature and load conditions per Analog Devices' REF19x Series datasheet Rev. L. This value is laser-trimmed using factory test points (Pins 1 and 5) and remains stable within ±2 mV at 25°C and ±5 mV over −40°C to +85°C for E-grade units. The REF195ES-REEL output is intended for direct use with 5 V ADCs, DACs, and analog signal chains without external scaling.
Does the REF195ES-REEL support sleep mode, and how is it activated?
Yes, the REF195ES-REEL features a dedicated sleep mode controlled via Pin 3 (SLEEP). Applying a logic low (≤0.8 V) to this pin disables the output and reduces supply current to ≤15 μA, while a logic high (≥2.4 V) restores full operation with ≤45 μA current draw. The transition is fast (<10 μs wake-up), and the pin accepts standard TTL/CMOS levels. No external pull-up/down is required, but proper decoupling near Pin 2 (VS) and Pin 4 (GND) is essential for noise immunity. This function is integral to the REF195ES-REEL design and documented in Tables 15 and 18 of the datasheet.
What is the minimum supply voltage required for the REF195ES-REEL to regulate at full load?
The REF195ES-REEL achieves regulation with a minimum dropout voltage of 0.50 V at 10 mA load (per Table 14, VS = 5.50 V), meaning it requires at least 5.50 V input to sustain 5.00 V output under that condition. At 30 mA load, dropout rises to 1.30 V (VS = 6.30 V), so minimum supply is 6.30 V. These values are measured across −40°C to +85°C and reflect worst-case E-grade performance. The REF195ES-REEL's LDV architecture enables operation from supplies as low as 100 mV above nominal output-critical for battery-powered systems nearing end-of-life.
Can the REF195ES-REEL be used in automotive applications?
The REF195ES-REEL is specified over the extended industrial temperature range of −40°C to +85°C and exhibits typical performance up to +125°C, as confirmed in Tables 16–17 of the datasheet. While not AEC-Q200 qualified, its tested behavior across −40°C to +125°C-including 5 ppm/°C max tempco and stable dropout-supports use in under-hood auxiliary modules, body control units, and non-safety-critical automotive sensors where full qualification is not mandated. For production automotive applications, designers should verify long-term reliability under thermal cycling and vibration per their internal qualification protocols. The REF195ES-REEL itself is not marketed as automotive-grade by Analog Devices.
What bypass capacitor is required for stable operation of the REF195ES-REEL?
A 1 μF ceramic capacitor must be placed between the OUTPUT (Pin 8) and GND (Pin 4) terminals of the REF195ES-REEL for stable operation and optimal noise performance, as explicitly required in Notes 1 of Tables 3, 6, 9, 12, and 15. This capacitor suppresses high-frequency instability and reduces 0.1–10 Hz noise to 50 μV p-p. X7R or C0G dielectrics are recommended; placement must be adjacent to the device with short, low-inductance traces. Failure to install this capacitor risks oscillation and degraded accuracy. No additional input or sleep-pin filtering is specified for the REF195ES-REEL in standard operation.
REF195ES-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:
- ±0.04%
- Temperature Coefficient:
- 5ppm/°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
REF195ES-REEL FAQ
1.How can I place an order for REF195ES-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF195ES-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 REF195ES-REEL reliable?
The price and inventory of REF195ES-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF195ES-REEL is usually 5 days.
3.What payment methods are accepted for REF195ES-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF195ES-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF195ES-REEL?
REF195ES-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF195ES-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 REF195ES-REEL?
For technical support, including REF195ES-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF195ES-REEL requirements.
6.How does Aetrix verify that REF195ES-REEL is sourced from the original manufacturer or authorized distributors?
All REF195ES-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 REF195ES-REEL meets industry standards.
7.What is the process for return or replacement of REF195ES-REEL?
All REF195ES-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF195ES-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 REF195ES-REEL part is unused and in its original packaging.
Return procedure for REF195ES-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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