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Analog Devices Inc. REF192ES
- Part No.:
- REF192ES
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF192ES.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
REF192ES from Analog Devices is a precision micropower low-dropout voltage reference IC delivering 2.50 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 instrumentation and solar-powered sensor nodes.
For engineers reviewing the REF192ES datasheet, REF192ES pinout, REF192ES application, or REF192ES equivalent, key selection criteria include dropout voltage (1.00 V at 10 mA), sleep-mode current (15 μA), load regulation (4 ppm/mA), and extended industrial temperature operation (−40°C to +85°C) with automotive-grade performance up to +125°C.
Technical Context
The REF192ES uses a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve stable 2.50 V output across temperature and load. Its SLEEP pin enables TTL/CMOS-compatible shutdown, reducing quiescent current to ≤15 μA while disabling output.
It operates with supply voltages as low as 100 mV above nominal output (i.e., ≥2.60 V), supports 30 mA output current, and requires only a 1 μF output bypass capacitor for stability. Line regulation is specified at 4 ppm/V (E grade, 25°C), and load regulation at 4 ppm/mA under defined conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 2.50 V - precisely trimmed for use as reference in 12-bit to 16-bit data converters |
| Initial Accuracy | ±2 mV maximum (E grade) - ensures ≤0.08% absolute error at 25°C before calibration |
| Temp Coefficient | 5 ppm/°C maximum (E grade, −40°C to +85°C) - contributes ≤125 μV drift over full industrial range |
| Supply Current | 45 μA maximum - enables multi-year battery life in energy-constrained IoT sensors |
| Sleep Mode Current | 15 μA maximum - allows periodic wake-up architectures without compromising system standby power |
| Dropout Voltage | 1.00 V at 10 mA load - permits operation from single-cell Li-ion (3.0–3.6 V) or 3.3 V rails with margin |
| Output Noise | 25 μV p-p (0.1 Hz to 10 Hz) - minimizes quantization uncertainty in precision measurement front-ends |
Pinout & Package
REF192ES is housed 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 Zener trim point | No user connection; internal trimming node-floating per design |
| 2 (VS) | Positive supply input | Accepts 2.60 V to 15 V; dropout headroom as low as 100 mV required |
| 3 (SLEEP) | Digital enable control | Active-low TTL/CMOS input; <0.8 V disables output and reduces IQ to ≤15 μA |
| 4 (GND) | Analog ground reference | Must be tied to clean system ground; Kelvin connection recommended for high-accuracy layouts |
| 5 (TP) | Factory Zener trim point | No user connection; internal trimming node-floating per design |
| 6 (NC) | No connect | Internally unused; leave unconnected and unstubbed |
| 7 (NC) | No connect | Internally unused; leave unconnected and unstubbed |
| 8 (OUTPUT) | Precision voltage output | 2.50 V source capable of sourcing up to 30 mA; requires 1 μF ceramic bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected band gap | Enables 5 ppm/°C tempco without external compensation components |
| Laser-trimmed thin-film resistors | Guarantees ±2 mV initial accuracy without post-assembly calibration |
| Low-dropout architecture | Operates from supplies as low as 2.60 V-ideal for single-cell battery systems |
| Sleep mode with digital control | Reduces supply current from 45 μA to 15 μA via logic-level SLEEP pin |
| Short-circuit protected output | Withstands indefinite output short to GND without damage or parameter shift |
Applications
| Portable Instrumentation | ADC/DAC Reference |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit SAR ADC powered by two AA alkaline cells (1.8–3.2 V). IC Role / Device Role / Timing Role: Primary voltage reference supplying stable 2.50 V to ADC reference input and internal DAC for auto-ranging. Use Value: 5 ppm/°C tempco and 25 μV p-p noise ensure <0.01% measurement repeatability across 0–50°C ambient. |
Use Scenario: Industrial PLC analog input module with simultaneous-sampling 18-bit delta-sigma ADCs. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for multiple ADC channels sharing common 2.50 V VREF rail. Use Value: 4 ppm/mA load regulation prevents cross-channel gain error when channel count scales from 4 to 16 inputs. |
| Smart Sensor Nodes | Solar-Powered Monitoring |
|
Use Scenario: Wireless temperature/humidity sensor node using ultra-low-power MCU and RF transceiver. IC Role / Device Role / Timing Role: Bias reference for precision RTD and capacitive humidity sensing front-end, active only during measurement bursts. Use Value: Sleep mode draws just 15 μA-reducing average system current by >40% versus non-sleep references. |
Use Scenario: Remote environmental monitor powered by small solar panel and supercapacitor buffer. IC Role / Device Role / Timing Role: Stable 2.50 V reference for ADC measuring photodiode current and battery voltage under variable light conditions. Use Value: 1.00 V dropout enables operation down to 2.60 V supply-extending usable runtime during low-light periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3425ARJZ-R7 | 2.5 V output, 3 ppm/°C max tempco, 4.5 μA typical IQ, no sleep mode, SOT-23-5 package | Better tempco and lower quiescent current, but lacks digital shutdown and higher output drive (10 mA only) | Preferred for space-constrained, always-on ultra-low-power designs where sleep control is unnecessary |
| MAX6126AASA+T | 2.5 V output, 3 ppm/°C max tempco, 350 μA IQ, no sleep mode, SOIC-8 package | Superior long-term stability (20 ppm/√kHr) and better line/load regulation, but 8× higher supply current | Chosen when aging-critical applications (e.g., metrology calibrators) outweigh power budget constraints |
Compared with ADR3425ARJZ-R7 and MAX6126AASA+T, REF192ES uniquely balances micropower operation (45 μA), digital sleep control (15 μA), 30 mA output drive, and SOIC-8 compatibility-making it optimal for battery-backed instrumentation requiring both precision and dynamic power management.
Availability
REF192ES is available at Aetrix Electronics and suitable for portable instrumentation, precision ADC/DAC reference circuits, and solar-powered sensor nodes requiring stable component supply with guaranteed long-term availability.
Supply support for REF192ES 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, with R&D and manufacturing operations worldwide.
The REF19x series was designed specifically for micropower, low-dropout precision voltage referencing in battery-operated and energy-harvesting systems-emphasizing accuracy, thermal stability, and intelligent power control.
FAQ
What is the maximum output current capability of the REF192ES?
The REF192ES delivers up to 30 mA of output current while maintaining specified accuracy and regulation. This capability supports direct driving of multiple ADC reference inputs, op-amp bias networks, or low-power microcontroller VREF pins without external buffering-enabling simplified, compact PCB layouts in multi-channel data acquisition systems.
Does the REF192ES require an output bypass capacitor, and if so, what value?
Yes, the REF192ES requires a minimum 1 μF ceramic capacitor connected between the OUTPUT and GND pins for stability and noise reduction. This capacitor must be placed as close as possible to the device pins; X7R or C0G dielectrics are recommended to maintain low ESR and ensure consistent performance across temperature and voltage.
How does the SLEEP pin function on the REF192ES?
The SLEEP pin on the REF192ES is an active-low digital control input: applying a logic low (<0.8 V) disables the output and reduces supply current to ≤15 μA, while a logic high (>2.4 V) enables normal operation at ≤45 μA. No external pull-up is required-the internal structure supports direct connection to MCU GPIO pins.
What is the minimum supply voltage needed for the REF192ES to regulate at 2.50 V?
The REF192ES achieves regulation with a minimum supply voltage of 2.60 V-corresponding to its 100 mV dropout specification. At 10 mA load, the datasheet specifies 1.00 V dropout, meaning VS must be ≥3.50 V; actual minimum VS depends on load current and temperature, and must exceed VO + dropout voltage under operating conditions.
Is the REF192ES qualified for automotive applications?
The REF192ES is specified over the extended industrial temperature range (−40°C to +85°C) with typical performance validated to +125°C, supporting under-hood and cabin applications. While not AEC-Q200 qualified, its tested behavior at +125°C and robustness features-including short-circuit protection and solder heat resilience-make it suitable for non-safety-critical automotive subsystems like body control modules and infotainment sensors.
REF192ES Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF19
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.08%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 25µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3V ~ 15V
- Current - Supply:
- 45µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF192ES FAQ
1.How can I place an order for REF192ES through Aetrix?
Please submit a Request for Quotation (RFQ) for REF192ES 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 REF192ES reliable?
The price and inventory of REF192ES are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF192ES is usually 5 days.
3.What payment methods are accepted for REF192ES?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF192ES transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF192ES?
REF192ES orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF192ES 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 REF192ES?
For technical support, including REF192ES datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF192ES requirements.
6.How does Aetrix verify that REF192ES is sourced from the original manufacturer or authorized distributors?
All REF192ES 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 REF192ES meets industry standards.
7.What is the process for return or replacement of REF192ES?
All REF192ES units undergo pre-shipment inspection (PSI). If there is an issue with REF192ES, 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 REF192ES part is unused and in its original packaging.
Return procedure for REF192ES:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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