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Analog Devices Inc. REF198GS-REEL
- Part No.:
- REF198GS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF198GS-REEL.pdf
- Description:
- IC VREF SERIES 0.24% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,622
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Product details
Overview
REF198GS-REEL from Analog Devices is a precision micropower low-dropout voltage reference IC delivering a stable 4.096 V output with ±2 mV initial accuracy, 5 ppm/°C max temperature coefficient, and 45 μA max supply current - used in high-resolution ADC/DAC biasing and portable instrumentation where supply headroom and thermal stability are critical.
For engineers reviewing the REF198GS-REEL datasheet, REF198GS-REEL pinout, REF198GS-REEL application, or REF198GS-REEL equivalent, this page provides verified specifications, SOIC_N package layout, sleep-mode control behavior, load/line regulation performance, and validated alternative options for precision analog signal chains.
Technical Context
The REF198GS-REEL implements a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve low drift across −40°C to +85°C. Its low-dropout architecture supports operation with only 100 mV overhead above the 4.096 V output, enabling use with single-cell Li-ion or energy-harvesting supplies.
Sleep mode is controlled via TTL/CMOS-compatible SLEEP pin (Pin 3), reducing quiescent current to ≤15 μA while disabling output. Output short-circuit protection and 1 μF mandatory bypass capacitor ensure robustness in field-deployed sensor nodes and loop-powered transmitters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 4.096 V - matches common 12-bit DAC/ADC full-scale reference points; eliminates scaling error in digital-to-analog conversion. |
| Initial Accuracy | ±2 mV maximum at 25°C - enables <0.05% absolute voltage error without calibration in portable test equipment. |
| Temp Coefficient | 5 ppm/°C maximum - contributes ≤0.2 mV drift over −40°C to +85°C ambient, critical for unheated outdoor sensors. |
| Supply Current | 45 μA maximum - allows >1-year battery life in coin-cell–powered IoT endpoints with 200 μA·h capacity. |
| Sleep Mode Current | 15 μA maximum - reduces standby power by 67% versus active mode, supporting duty-cycled measurement systems. |
| Dropout Voltage | 0.50 V at 10 mA load - permits operation from 4.6 V input (e.g., discharged Li-ion), extending usable battery range. |
| Load Regulation | 4 ppm/mA - ensures <17 μV output shift per mA load change, preserving linearity in variable-current sensor interfaces. |
Pinout & Package
REF198GS-REEL is housed in an 8-lead SOIC_N (SOIC-8 narrow-body) package, 3.9 mm × 4.9 mm footprint, 1.25 mm height, with standard 1.27 mm pitch. Pin 1 and Pin 5 are factory test points (unconnected); Pins 4 and 7 are GND and OUTPUT respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Test Point | Zener-zap trim node; must remain unconnected in PCB layout to avoid accuracy degradation. |
| 2 (VS) | Positive Supply Input | Accepts 4.6 V to 15 V; dropout as low as 0.5 V enables ultra-low-headroom operation. |
| 3 (SLEEP) | Digital Sleep 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; requires low-impedance connection to system ground plane. |
| 5 (TP) | Factory Test Point | Second Zener-zap node; no user connection permitted - floating or tied to GND degrades trimming. |
| 6 (NC) | No Connect | Internally unused; must be left floating - routing traces or vias here risks EMI coupling. |
| 7 (OUTPUT) | Precision Voltage Output | Delivers regulated 4.096 V; requires 1 μF ceramic capacitor to GND (Pin 4) for stability and noise reduction. |
| 8 (NC) | No Connect | Internally unused; must be left floating - no tie-to-ground or pull-up allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-Corrected Band Gap Core | Reduces parabolic temperature drift, enabling 5 ppm/°C max TCVO over industrial temperature range. |
| Laser-Trimmed Thin-Film Resistors | Ensures ±2 mV initial accuracy without post-package calibration, lowering production test cost. |
| Low-Dropout Operation (0.5 V @ 10 mA) | Supports direct regulation from single Li-ion cells (3.0–4.2 V) when paired with external LDO pre-regulator. |
| Sleep Mode with TTL/CMOS Interface | Enables microcontroller-driven power gating in wireless sensor nodes, cutting idle current by 67%. |
| Short-Circuit Protected Output | Withstands indefinite output-to-ground faults without damage or parameter shift, improving field reliability. |
Applications
| Portable Instrumentation | High-Resolution Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Primary voltage reference for ADC full-scale scaling and internal DAC calibration. Use Value: 4.096 V output aligns with 212 = 4096 LSB count, eliminating integer rounding error in digitized readings. |
Use Scenario: Industrial vibration monitor using MEMS accelerometer and 24-bit ΣΔ ADC. IC Role / Device Role / Timing Role: Stable excitation source for ratiometric sensor bridge and reference for ADC conversion. Use Value: 5 ppm/°C tempco limits gain drift to <0.01% over operating temperature, preserving measurement repeatability. |
| Solar-Powered Remote Sensors | Loop-Powered Transmitters |
|
Use Scenario: Wireless soil moisture node powered by 3.7 V LiPo + solar charge controller. IC Role / Device Role / Timing Role: Low-quiescent reference for sensor biasing and ADC during intermittent wake cycles. Use Value: 45 μA active and 15 μA sleep current extends battery life to >2 years at 1-sample/hour duty cycle. |
Use Scenario: 4–20 mA HART-enabled pressure transmitter with 2-wire loop power. IC Role / Device Role / Timing Role: Precision reference for current-loop DAC and onboard microcontroller ADC. Use Value: 0.5 V dropout allows regulation from minimal loop headroom (~3.5 V), maximizing dynamic range for analog sensing. |
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, 12 ppm/°C max tempco, 120 μA supply current, SOT-23-5 package. | Higher quiescent current and tempco; suitable for space-constrained designs where 8-pin SOIC is impractical. | Select ADR3440ARJZ-R7 only if board area is primary constraint and 12 ppm/°C drift is acceptable. |
| MAX6126AASA+T | 4.096 V output, 3 ppm/°C max tempco, 85 μA supply current, 8-pin SOIC package, no sleep mode. | Lower tempco but higher supply current and no power-gating capability; better for always-on metrology systems. | Choose MAX6126AASA+T when ultimate temperature stability is required and sleep functionality is unnecessary. |
Compared with REF198GS-REEL, ADR3440ARJZ-R7 trades lower package profile for higher drift and current, while MAX6126AASA+T improves tempco at the cost of sleep mode and increased quiescent draw - making REF198GS-REEL optimal for battery-operated, thermally variable environments requiring both precision and power control.
Availability
REF198GS-REEL is available at Aetrix Electronics and suitable for portable instrumentation, high-resolution data acquisition, and solar-powered remote sensors requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for REF198GS-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, with design centers worldwide and ISO 9001-certified manufacturing.
The REF19x series was developed specifically for micropower, low-dropout precision reference needs in portable, battery- and energy-harvesting–powered systems - emphasizing thermal stability, minimal supply overhead, and integrated sleep control.
FAQ
What is the nominal output voltage of the REF198GS-REEL?
The REF198GS-REEL delivers a nominal output voltage of 4.096 V, optimized to align with 12-bit digital systems (212 = 4096) and eliminate scaling errors in ADC/DAC interfaces. This value is laser-trimmed and specified across all grades (E/F/G) with ±2 mV initial accuracy at 25°C.
Does the REF198GS-REEL require an external output capacitor?
Yes, the REF198GS-REEL requires a minimum 1 μF ceramic capacitor connected between the OUTPUT (Pin 7) and GND (Pin 4) pins. This capacitor stabilizes the reference, reduces 0.1 Hz–10 Hz noise (45 μV p-p typical), and prevents oscillation under varying load conditions - omission causes output instability and degraded accuracy.
How does the SLEEP pin function on the REF198GS-REEL?
The SLEEP pin (Pin 3) is a TTL/CMOS-compatible digital input that disables the REF198GS-REEL output and reduces supply current to ≤15 μA when pulled low. A logic high (≥2.4 V) enables normal operation. The pin draws ≤8 μA in either state, enabling direct interfacing with low-power microcontrollers without level-shifting.
What is the maximum dropout voltage specification for the REF198GS-REEL?
The REF198GS-REEL has a maximum dropout voltage of 0.50 V at 10 mA load (VS = 5.00 V), and up to 1.45 V at 20 mA load with VS = 5.95 V. This low-dropout capability allows operation from supplies as low as 4.6 V - critical for single-cell Li-ion or energy-harvesting applications where input voltage margin is limited.
Is the REF198GS-REEL suitable for automotive temperature ranges?
The REF198GS-REEL is specified over the extended industrial range (−40°C to +85°C) and exhibits typical performance up to +125°C, including 5 ppm/°C max tempco and 15 μA sleep current. While not AEC-Q200 qualified, its validated behavior at +125°C supports under-hood sensor modules and engine-control auxiliary references where full qualification is not mandated.
REF198GS-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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.24%
- Temperature Coefficient:
- 25ppm/°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
REF198GS-REEL FAQ
1.How can I place an order for REF198GS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF198GS-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 REF198GS-REEL reliable?
The price and inventory of REF198GS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF198GS-REEL is usually 5 days.
3.What payment methods are accepted for REF198GS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF198GS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF198GS-REEL?
REF198GS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF198GS-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 REF198GS-REEL?
For technical support, including REF198GS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF198GS-REEL requirements.
6.How does Aetrix verify that REF198GS-REEL is sourced from the original manufacturer or authorized distributors?
All REF198GS-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 REF198GS-REEL meets industry standards.
7.What is the process for return or replacement of REF198GS-REEL?
All REF198GS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF198GS-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 REF198GS-REEL part is unused and in its original packaging.
Return procedure for REF198GS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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