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Analog Devices Inc. REF198ESZ-REEL
- Part No.:
- REF198ESZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF198ESZ-REEL.pdf
- Description:
- IC VREF SERIES 0.05% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,848
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Product details
Overview
REF198ESZ-REEL from Analog Devices is a precision micropower low-dropout voltage reference IC delivering 4.096 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 sleep mode (15 μA) for portable instrumentation and loop-powered sensor systems.
For engineers reviewing the REF198ESZ-REEL datasheet, REF198ESZ-REEL pinout, REF198ESZ-REEL application, or REF198ESZ-REEL equivalent, key selection criteria include dropout voltage at 30 mA load, sleep-mode enable timing, output noise (40 μV p-p, 0.1–10 Hz), and SOIC_N package thermal resistance (θJA = 130°C/W).
Technical Context
The REF198ESZ-REEL uses patented curvature-corrected band gap architecture with laser-trimmed thin-film resistors to achieve stable 4.096 V output across −40°C to +85°C. Its SLEEP pin enables TTL/CMOS-compatible shutdown, reducing quiescent current to ≤15 μA while disabling output.
Designed for high-precision analog signal chains, it features 4 ppm/mA load regulation and 4 ppm/V line regulation at 25°C, with short-circuit protection and Kelvin-sense-capable output configuration. The device requires a 1 μF output-to-GND bypass capacitor for stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 4.096 V - matches common 12-bit ADC full-scale reference and simplifies ratiometric measurement design |
| Initial Accuracy | ±2 mV maximum - ensures ≤0.049% error at 4.096 V without calibration |
| Temp Coefficient | 5 ppm/°C max - drift ≤±0.17 mV over −40°C to +85°C operating range |
| Supply Current | 45 μA max - enables >1-year battery life in 10 μA average-power portable systems |
| Sleep Mode Current | 15 μA max - reduces standby power by 67% versus active mode |
| Dropout Voltage | 0.60 V at 10 mA (VS = 4.70 V) - supports operation from single Li-ion or dual alkaline cells |
| Output Noise | 40 μV p-p (0.1–10 Hz) - limits RMS noise contribution to <1 LSB in 16-bit ADC systems |
Pinout & Package
REF198ESZ-REEL is housed in an 8-lead SOIC_N (SOIC-8 narrow-body) package with exposed pad (suffix 'ESZ'), measuring 3.9 mm × 4.9 mm × 1.75 mm. 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; resistance varies per unit; leaving unconnected preserves output accuracy |
| 2 (VS) | Positive supply input | Accepts 4.196 V to 15 V; dropout as low as 0.6 V enables ultra-low headroom operation |
| 3 (SLEEP) | Digital enable control | TTL/CMOS-compatible; low = output disabled, current ≤15 μA; rise/fall time <1 μs |
| 4 (GND) | Analog ground reference | Must be star-connected to system ground; separates reference return from power return paths |
| 5 (TP) | Factory Zener trim point | No user connection; not electrically functional in application; floating per datasheet |
| 6 (NC) | No connect | Internally unconnected; must be left open or tied to GND per layout best practice |
| 7 (NC) | No connect | Internally unconnected; no routing or loading permitted |
| 8 (OUTPUT) | Precision voltage output | 4.096 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 or trimming |
| Laser-trimmed thin-film resistors | Guarantees ±2 mV initial accuracy without post-package calibration |
| Low-dropout operation | Supports 4.196 V minimum supply for 4.096 V output - ideal for single-cell energy harvesting |
| Sleep mode with fast wake-up | Reduces current to 15 μA while maintaining sub-1 μs enable response for duty-cycled sensing |
| Short-circuit protected output | Withstands indefinite 0 Ω load without damage or parameter shift - simplifies fault-tolerant design |
Applications
| Portable Instrumentation | ADC Reference for Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Primary voltage reference supplying stable 4.096 V to ADC reference input and internal DAC. Use Value: Enables ±0.003% full-scale accuracy over temperature with <10 μA average current draw in sleep-between-readings mode. | Use Scenario: Industrial process transmitter with isolated 4–20 mA loop and local 24-bit ΣΔ ADC. IC Role / Device Role / Timing Role: Ratiometric reference for ADC and excitation voltage for RTD bridge. Use Value: Matches 4.096 V to 12-bit DAC resolution and provides <40 μV p-p noise floor for <0.001% THD+N performance. |
| Smart Sensor Signal Conditioning | Solar-Powered Environmental Monitor |
Use Scenario: Wireless gas sensor node with MEMS transducer, low-power MCU, and 12-bit ADC. IC Role / Device Role / Timing Role: Low-quiescent reference for analog front-end amplification and ADC conversion. Use Value: Delivers 4.096 V at 45 μA, enabling >2-year battery life while maintaining <0.5 LSB integral nonlinearity error. | Use Scenario: Remote soil moisture sensor powered by 2.5 V solar cell and supercapacitor buffer. IC Role / Device Role / Timing Role: Ultra-low-headroom reference enabling operation when input drops to 4.196 V. Use Value: 0.6 V dropout allows continuous 4.096 V output during dawn/dusk low-light conditions where supply dips below 4.5 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3440ARJZ-R7 | 4.096 V output, 3 ppm/°C max tempco, 35 μA supply current, SOT-23-5 package | No SLEEP pin; fixed output only; smaller footprint but lower output current (10 mA) | Select when board space is critical and sleep control is handled externally or unnecessary |
| MAX6126AASA41+T | 4.096 V output, 3 ppm/°C max tempco, 85 μA supply current, SO-8 package, no sleep mode | Higher drive capability (20 mA), better long-term stability (15 ppm/1kHr), no enable pin | Select when lowest drift and higher output current outweigh micropower and sleep requirements |
Compared with ADR3440ARJZ-R7 and MAX6126AASA41+T, REF198ESZ-REEL uniquely combines 30 mA output drive, integrated sleep control, and SOIC_N compatibility - making it optimal for portable instruments requiring both precision and dynamic power management.
Availability
REF198ESZ-REEL is available at Aetrix Electronics and suitable for portable instrumentation, precision ADC/DAC reference circuits, and solar-powered environmental monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for REF198ESZ-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 needs in battery-operated and energy-constrained systems - emphasizing accuracy retention across temperature, minimal supply overhead, and robust enable/disable control.
FAQ
What is the maximum load current supported by REF198ESZ-REEL?
The REF198ESZ-REEL delivers up to 30 mA of output current while maintaining specified accuracy and regulation. At 30 mA load, dropout voltage is 1.45 V (measured at VS = 5.95 V), confirming its suitability for driving ADC references, op-amp bias networks, and small DAC loads. Exceeding 30 mA may degrade line/load regulation or trigger thermal shutdown.
Does REF198ESZ-REEL require an external bypass capacitor?
Yes, REF198ESZ-REEL requires a minimum 1 μF ceramic capacitor between OUTPUT and GND pins for stability and noise reduction. This capacitor must be placed within 5 mm of the device, using X7R or C0G dielectric. Omitting it risks oscillation, increased output noise (>100 μV p-p), and degraded load regulation performance per datasheet Section "Output Voltage Bypassing".
How does the SLEEP pin function on REF198ESZ-REEL?
The SLEEP pin on REF198ESZ-REEL is an active-low TTL/CMOS-compatible control input. Driving it below 0.8 V disables the output and reduces supply current to ≤15 μA. Pulling it above 2.4 V enables normal operation. Input leakage is ≤−8 μA in both states, allowing direct MCU GPIO control without level-shifting or additional drivers.
What is the temperature range specification for REF198ESZ-REEL?
REF198ESZ-REEL is fully specified over the extended industrial temperature range of −40°C to +85°C, including all key parameters: initial accuracy, tempco (5 ppm/°C max), line/load regulation, and sleep-mode current. Typical performance extends to +125°C, supporting under-hood automotive sensor modules when thermally derated per datasheet thermal resistance (θJA = 130°C/W).
Can REF198ESZ-REEL be used in a Kelvin (4-wire) reference configuration?
Yes, REF198ESZ-REEL supports Kelvin connections via separate OUTPUT and GND pins - enabling remote sensing to eliminate PCB trace IR drop errors. The datasheet explicitly recommends this for applications demanding <0.01% accuracy, such as precision calibrators and metrology-grade data loggers. No additional pins or external components are required beyond proper layout separation of sense and force paths.
REF198ESZ-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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 40µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.5V ~ 15V
- Current - Supply:
- 45µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF198ESZ-REEL FAQ
1.How can I place an order for REF198ESZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF198ESZ-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 REF198ESZ-REEL reliable?
The price and inventory of REF198ESZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF198ESZ-REEL is usually 5 days.
3.What payment methods are accepted for REF198ESZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF198ESZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF198ESZ-REEL?
REF198ESZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF198ESZ-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 REF198ESZ-REEL?
For technical support, including REF198ESZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF198ESZ-REEL requirements.
6.How does Aetrix verify that REF198ESZ-REEL is sourced from the original manufacturer or authorized distributors?
All REF198ESZ-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 REF198ESZ-REEL meets industry standards.
7.What is the process for return or replacement of REF198ESZ-REEL?
All REF198ESZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF198ESZ-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 REF198ESZ-REEL part is unused and in its original packaging.
Return procedure for REF198ESZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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