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Analog Devices Inc. REF198GRUZ-REEL7
- Part No.:
- REF198GRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
REF198GRUZ-REEL7.pdf
- Description:
- IC VREF SERIES 0.24% 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,617
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Product details
Overview
REF198GRUZ-REEL7 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 - designed for high-accuracy ADC/DAC biasing in portable and solar-powered instrumentation.
For engineers reviewing the REF198GRUZ-REEL7 datasheet, REF198GRUZ-REEL7 pinout, REF198GRUZ-REEL7 application, or REF198GRUZ-REEL7 equivalent, key selection criteria include dropout voltage ≤1.3 V at 30 mA load, sleep-mode current ≤15 μA, and guaranteed operation from −40°C to +85°C with 1 μF output bypass capacitance.
Technical Context
The REF198GRUZ-REEL7 uses a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve low drift and high initial accuracy. Its SLEEP pin enables TTL/CMOS-compatible shutdown, reducing quiescent current to ≤15 μA while disabling output.
It operates with input-to-output headroom as low as 100 mV above nominal output (i.e., ≥4.196 V supply for full 30 mA load), supports 30 mA output current, and features short-circuit protection plus 4 ppm/mA load regulation and 4 ppm/V line regulation - all specified over extended industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 4.096 V - matches common 12-bit ADC full-scale reference and simplifies ratio-metric design. |
| Initial Accuracy | ±2 mV maximum at 25°C - enables <0.05% absolute error without calibration in precision data acquisition. |
| Temp Coefficient | 5 ppm/°C maximum (−40°C to +85°C) - contributes ≤0.25 mV drift over full industrial range. |
| Supply Current | 45 μA maximum (active), 15 μA maximum (sleep) - extends battery life in always-on sensor nodes. |
| Dropout Voltage | 1.3 V maximum at 30 mA load - allows operation from single Li-ion or 5 V rail with margin. |
| Output Current | 30 mA maximum - drives ADC reference inputs, DAC buffers, and small analog circuitry directly. |
| Noise (0.1–10 Hz) | 40 μV p-p typical - minimizes quantization uncertainty in high-resolution SAR and delta-sigma converters. |
Pinout & Package
REF198GRUZ-REEL7 is housed in an 8-lead SOIC_N (RU suffix) package with exposed pad for thermal enhancement. Pin 1 and Pin 5 are factory test points (unconnected); Pins 6 and 7 are no-connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Test Point | Zener-zap trim node - must remain unconnected in PCB layout to preserve accuracy. |
| 2 (VS) | Positive Supply Input | Accepts 4.196 V to 15 V; requires local 0.1 μF + 1 μF bypass to GND per datasheet. |
| 3 (SLEEP) | Digital Enable Control | TTL/CMOS-compatible; low = output disabled, current ≤15 μA; high = active mode. |
| 4 (GND) | Analog Ground Reference | Return path for output and internal circuitry; Kelvin connection recommended for <10 ppm accuracy. |
| 5 (TP) | Factory Test Point | Zener-zap trim node - must remain unconnected; not for user routing or decoupling. |
| 6 (NC) | No Connect | Internally unused; leave floating - no trace or copper pour should connect to this pin. |
| 7 (NC) | No Connect | Internally unused; leave floating - avoids parasitic coupling in high-PSRR designs. |
| 8 (OUTPUT) | Precision Voltage Output | 4.096 V source/sink; requires 1 μF ceramic capacitor to GND for stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Curvature-corrected band gap | Enables 5 ppm/°C tempco without external compensation components or trimming circuits. |
| Sleep mode with digital control | Reduces supply current from 45 μA to ≤15 μA via logic-level SLEEP pin - ideal for duty-cycled sensors. |
| Low dropout (≤1.3 V @ 30 mA) | Permits direct use from 5 V rails or single-cell Li-ion (4.2 V) with >100 mV headroom margin. |
| Laser-trimmed thin-film resistors | Guarantees ±2 mV initial accuracy without post-assembly calibration in production test flow. |
| Short-circuit protected output | Withstands indefinite output-to-ground fault without damage or parameter shift - improves field reliability. |
Applications
| Portable Instrumentation | High-Resolution Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter with 24-bit sigma-delta ADC and battery-powered operation. IC Role / Device Role / Timing Role: Primary reference for ADC and internal DAC used in auto-zero and gain calibration. Use Value: 4.096 V output aligns with 212 scaling; 45 μA supply current extends 100-hour battery life; sleep mode cuts current during display idle. |
Use Scenario: Industrial process transmitter with isolated 4–20 mA loop and local sensor digitization. IC Role / Device Role / Timing Role: Stable excitation and reference source for bridge sensor signal chain and ADC conversion. Use Value: 5 ppm/°C tempco ensures <±0.01% FS error over −40°C to +85°C ambient; 30 mA drive supports multiple op-amp stages. |
| Solar-Powered Remote Sensors | Loop-Powered Field Instruments |
|
Use Scenario: Wireless environmental node powered by small PV panel and supercapacitor buffer. IC Role / Device Role / Timing Role: Low-quiescent reference for ultra-low-power microcontroller ADC and sensor biasing. Use Value: 15 μA sleep current enables multi-year deployment; 100 mV dropout allows operation down to 4.2 V input during low-light conditions. |
Use Scenario: Two-wire 4–20 mA smart pressure transmitter with HART modulation capability. IC Role / Device Role / Timing Role: Precision reference for current-loop DAC and sensor front-end conditioning. Use Value: Guaranteed −40°C to +85°C operation meets industrial ambient specs; short-circuit protection prevents latch-up during wiring faults. |
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, 12 μA supply current, but only 10 mA output drive. | Better tempco and lower quiescent current, but insufficient for >10 mA reference loads or DAC buffer driving. | Select when ultra-low power dominates and load current ≤10 mA; verify dropout at target supply voltage. |
| MAX6126AASA41+T | 4.096 V output, 3 ppm/°C max tempco, 85 μA supply current, 15 mA output, no sleep mode. | Higher accuracy and tighter tempco, but lacks digital enable and delivers half the output current of REF198GRUZ-REEL7. | Choose for highest stability in fixed-power systems where sleep control is unnecessary and load ≤15 mA. |
Compared with ADR3440ARJZ-R7 and MAX6126AASA41+T, REF198GRUZ-REEL7 uniquely balances 30 mA drive, integrated sleep control, and industrial-temp 5 ppm/°C performance - making it optimal for battery-constrained, high-current, and thermally variable applications where both precision and configurability matter.
Availability
REF198GRUZ-REEL7 is available at Aetrix Electronics and suitable for portable instrumentation, high-resolution data acquisition, and solar-powered remote sensing requiring stable component supply across long-lifecycle industrial programs.
Supply support for REF198GRUZ-REEL7 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 precision measurement, industrial automation, and communications markets since 1965.
The REF19x series was developed to deliver micropower, low-dropout, and high-accuracy voltage references for battery-operated and thermally demanding instrumentation - emphasizing solder-shift resilience, wide supply range, and robust output drive.
FAQ
What is the minimum supply voltage required for REF198GRUZ-REEL7 to maintain regulation at full 30 mA load?
The REF198GRUZ-REEL7 requires a minimum supply voltage of 4.096 V + 1.3 V = 5.396 V to sustain regulation at 30 mA output current, as specified in the dropout voltage parameter. At lighter loads (e.g., 10 mA), dropout drops to 1.25 V, allowing operation from 5.346 V. Operation below these thresholds risks loss of output accuracy and increased noise.
Does REF198GRUZ-REEL7 require an output capacitor, and if so, what value and type?
Yes, REF198GRUZ-REEL7 requires a 1 μF ceramic capacitor between OUTPUT and GND for stability and noise reduction, as mandated in the datasheet. A parallel 0.1 μF X7R ceramic capacitor is also recommended at the VS pin. Using less than 1 μF or non-ceramic dielectrics may cause oscillation or degraded load regulation performance in the REF198GRUZ-REEL7.
How does the SLEEP pin function on REF198GRUZ-REEL7, and what happens to the output during sleep?
The SLEEP pin on REF198GRUZ-REEL7 is an active-low TTL/CMOS-compatible control: logic low (≤0.8 V) disables the output stage and reduces supply current to ≤15 μA; logic high (≥2.4 V) enables normal operation. During sleep, the OUTPUT pin is high-impedance - not shorted or clamped - so external circuitry must avoid unintended discharge paths that could affect downstream bias points.
Can REF198GRUZ-REEL7 be used in automotive applications requiring operation up to +125°C?
The REF198GRUZ-REEL7 is characterized for −40°C to +85°C operation per datasheet specifications. While some electrical parameters (e.g., tempco, dropout) are provided up to +125°C for the REF19x family, the RU package (SOIC_N) and G-grade accuracy bin are not qualified for full automotive AEC-Q100 stress testing. For +125°C environments, consult Analog Devices' automotive-grade alternatives or validate derating per application-specific reliability requirements.
What is the purpose of Pins 1 and 5 on REF198GRUZ-REEL7, and can they be connected externally?
Pins 1 and 5 on REF198GRUZ-REEL7 are factory test points used for Zener-zap trimming during production. Their resistance values vary significantly unit-to-unit and serve no functional role in end-use circuitry. The datasheet explicitly states these pins must remain unconnected - any external connection risks degrading output accuracy, causing instability, or violating the specified initial tolerance of ±2 mV in the REF198GRUZ-REEL7.
REF198GRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- ±0.24%
- 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-TSSOP
REF198GRUZ-REEL7 FAQ
1.How can I place an order for REF198GRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF198GRUZ-REEL7 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 REF198GRUZ-REEL7 reliable?
The price and inventory of REF198GRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF198GRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for REF198GRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF198GRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF198GRUZ-REEL7?
REF198GRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF198GRUZ-REEL7 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 REF198GRUZ-REEL7?
For technical support, including REF198GRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF198GRUZ-REEL7 requirements.
6.How does Aetrix verify that REF198GRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All REF198GRUZ-REEL7 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 REF198GRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of REF198GRUZ-REEL7?
All REF198GRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with REF198GRUZ-REEL7, 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 REF198GRUZ-REEL7 part is unused and in its original packaging.
Return procedure for REF198GRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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