My Inquiry
My Account
Analog Devices Inc. REF198ES-REEL
- Part No.:
- REF198ES-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF198ES-REEL.pdf
- Description:
- IC VREF SERIES 0.05% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,028
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REF198ES-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 - used as a stable reference for high-resolution ADCs and DACs in portable instrumentation and solar-powered sensor nodes.
For engineers reviewing the REF198ES-REEL datasheet, REF198ES-REEL pinout, REF198ES-REEL application, or REF198ES-REEL equivalent, key selection criteria include dropout voltage (≤1.45 V at 20 mA), sleep-mode current (≤15 μA), load regulation (≤10 ppm/mA), and SOIC_N package compatibility with Kelvin-sensing layouts.
Technical Context
The REF198ES-REEL implements a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve low drift across −40°C to +125°C. 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 (e.g., 4.196 V min VS for 4.096 V output) and maintains 4 ppm/mA load regulation and 4 ppm/V line regulation at 25°C - critical for ratiometric measurement systems where reference stability directly impacts converter ENOB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 4.096 V - matches common 12-bit DAC full-scale and 16-bit ADC reference scaling (e.g., 212 = 4096). |
| Initial Accuracy | ±2 mV maximum - enables <1 LSB error in 12-bit systems without calibration. |
| Temp Coefficient | 5 ppm/°C max - contributes ≤0.25 mV drift over 0°C–70°C ambient range. |
| Supply Current | 45 μA max - supports >1-year battery life in 10 μA average-power sensor nodes. |
| Sleep Mode Current | 15 μA max - allows periodic wake-up sampling without significant duty-cycle penalty. |
| Dropout Voltage | 1.45 V max at 20 mA - permits operation from single Li-ion (3.0–4.2 V) or dual alkaline (2.4–3.2 V) supplies. |
| Load Regulation | 10 ppm/mA max - ensures <0.04 mV shift across 4 mA load variation typical of SAR ADC reference inputs. |
Pinout & Package
REF198ES-REEL is housed in an 8-lead SOIC_N (SOIC-8 narrow-body) package with exposed pad (not electrically connected). Pin 1 and Pin 5 are factory test points (TP) reserved for Zener-zap trimming and must remain unconnected in circuit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TP) | Factory Trim Test Point | No user connection; internal Zener zap node - floating or tied to GND causes calibration loss. |
| 2 (VS) | Positive Supply Input | Accepts 4.196 V to 15 V; dropout as low as 100 mV above 4.096 V output. |
| 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 | Return path for output and internal bias; requires low-impedance Kelvin connection to output capacitor. |
| 5 (TP) | Factory Trim Test Point | No user connection; internal Zener zap node - floating or tied to GND causes calibration loss. |
| 6 (NC) | No Connect | Internally unused; must be left open or grounded per layout best practice (no routing). |
| 7 (NC) | No Connect | Internally unused; must be left open or grounded per layout best practice (no routing). |
| 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 Core | Enables 5 ppm/°C tempco over −40°C to +125°C without external compensation components. |
| Laser-Trimmed Thin-Film Resistors | Guarantees ±2 mV initial accuracy without post-assembly calibration or trimming. |
| Low-Dropout Operation (100 mV headroom) | Supports direct regulation from single-cell batteries or low-voltage DC-DC outputs. |
| Integrated Sleep Mode Control | Reduces supply current from 45 μA to 15 μA via logic-level pin - no external MOSFET needed. |
| Short-Circuit Protected Output | Withstands indefinite output-to-GND fault without damage or parameter shift. |
Applications
| Portable Instrumentation | High-Resolution Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Primary voltage reference for ADC front-end, providing stable 4.096 V scale independent of battery voltage decay. Use Value: Enables true 16-bit linearity (≤0.5 LSB INL) across full battery discharge cycle (3.0–4.2 V) due to 1.45 V dropout and 5 ppm/°C tempco. |
Use Scenario: Industrial process transmitter with isolated 4–20 mA loop and local 24-bit ADC. IC Role / Device Role / Timing Role: Ratiometric reference for bridge sensor excitation and ADC conversion, synchronized to loop power rail. Use Value: Delivers 4 ppm/mA load regulation and 4 ppm/V line regulation - minimizing gain error when loop voltage varies between 12–24 V. |
| Solar-Powered Wireless Sensor Node | Loop-Powered Smart Transmitter |
|
Use Scenario: Remote environmental monitor powered by 2.5 V–4.5 V solar harvester with intermittent operation. IC Role / Device Role / Timing Role: Low-quiescent reference enabling ultra-low-power wake-up cycles for temperature/humidity sensing. Use Value: Sleep mode draws only 15 μA, extending usable runtime by >3× versus non-sleep references under 1% duty cycle. |
Use Scenario: Field-mounted pressure transmitter drawing power exclusively from 4–20 mA loop (12–36 V). IC Role / Device Role / Timing Role: Precision reference for analog signal conditioning and microcontroller ADC, operating within tight loop power budget. Use Value: 45 μA supply current and 1.45 V dropout allow reliable start-up and regulation even at loop minimum (12 V) with 4.096 V output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4540BRZ-R7 | Higher initial accuracy (±0.12 mV), lower noise (1.8 μV p-p), but 950 μA supply current and 350 mV dropout. | Better for noise-sensitive 24-bit ADCs; unsuitable for micropower or low-headroom designs. | Select ADR4540BRZ-R7 only when ultra-low noise and sub-LSB accuracy outweigh power and dropout constraints. |
| MAX6126AASA+T | Lower tempco (3 ppm/°C), same 4.096 V output, but no sleep mode and 85 μA supply current. | Preferred for automotive under-hood use requiring extended temp range (−40°C to +125°C) without enable control. | Choose MAX6126AASA+T when sleep functionality is unnecessary and tighter tempco is prioritized over quiescent current. |
Compared with REF198ES-REEL, ADR4540BRZ-R7 trades micropower operation for ultra-low noise and accuracy, while MAX6126AASA+T offers superior temperature stability without sleep capability - making REF198ES-REEL optimal for battery-constrained, intermittently active systems needing balanced performance.
Availability
REF198ES-REEL is available at Aetrix Electronics and suitable for portable instrumentation, high-resolution data acquisition, and solar-powered wireless sensor nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for REF198ES-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, serving industrial, communications, automotive, and consumer markets since 1965.
The REF19x series was designed specifically for micropower, low-dropout precision reference applications in space- and energy-constrained systems - emphasizing accuracy retention across wide temperature and supply ranges without external support circuitry.
FAQ
What is the nominal output voltage of the REF198ES-REEL?
The REF198ES-REEL provides a nominal output voltage of 4.096 V, selected to align with binary scaling in 12-bit data converters (212 = 4096) and enable precise ratiometric measurements without gain adjustment. This value is laser-trimmed and specified across all grades (E/F/G) with ±2 mV initial accuracy at 25°C.
Does the REF198ES-REEL require an external output capacitor?
Yes, the REF198ES-REEL requires a minimum 1 μF ceramic capacitor connected between the OUTPUT and GND pins to ensure stability and minimize noise. This capacitor must be placed as close as possible to the device with short, low-inductance traces - omission or undersizing risks oscillation and degraded load regulation performance.
How does the SLEEP pin function on the REF198ES-REEL?
The SLEEP pin on the REF198ES-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 with ≤45 μA supply current. The pin draws ≤8 μA in either state and must not be left floating.
Can the REF198ES-REEL operate from a 3.3 V supply?
No - the REF198ES-REEL cannot regulate from a 3.3 V supply because its minimum dropout voltage is 1.45 V at 20 mA load, requiring a minimum input of 4.096 V + 1.45 V = 5.546 V. It is designed for supplies ≥4.196 V (100 mV headroom) up to 15 V, making it incompatible with standard 3.3 V rails.
What is the purpose of Pins 1 and 5 on the REF198ES-REEL?
Pins 1 and 5 on the REF198ES-REEL are factory test points (TP) used during Zener-zap trimming to calibrate output voltage. They are not intended for user connection - leaving them unconnected is mandatory. Routing, grounding, or loading these pins will disrupt internal calibration and invalidate accuracy specifications.
REF198ES-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:
- ±0.05%
- 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
REF198ES-REEL FAQ
1.How can I place an order for REF198ES-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for REF198ES-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 REF198ES-REEL reliable?
The price and inventory of REF198ES-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF198ES-REEL is usually 5 days.
3.What payment methods are accepted for REF198ES-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF198ES-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF198ES-REEL?
REF198ES-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF198ES-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 REF198ES-REEL?
For technical support, including REF198ES-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF198ES-REEL requirements.
6.How does Aetrix verify that REF198ES-REEL is sourced from the original manufacturer or authorized distributors?
All REF198ES-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 REF198ES-REEL meets industry standards.
7.What is the process for return or replacement of REF198ES-REEL?
All REF198ES-REEL units undergo pre-shipment inspection (PSI). If there is an issue with REF198ES-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 REF198ES-REEL part is unused and in its original packaging.
Return procedure for REF198ES-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF198ES-REEL Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
