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Analog Devices Inc. LT1018IS8#TRPBF
- Part No.:
- LT1018IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1018IS8#TRPBF.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
LT1018IS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual micropower comparator optimized for higher speed and precision over the LT1017, operating from 1.1V to 40V supply. It delivers 110μA typical supply current at 5V, 1mV max offset voltage, and 70mA output sink capability. Its rail-to-rail input common-mode range including ground and internal pull-up current source enable direct interface with microcontrollers and relay drivers in low-voltage industrial monitoring systems.
For engineers reviewing the LT1018IS8#TRPBF datasheet, LT1018IS8#TRPBF pinout, LT1018IS8#TRPBF application, or LT1018IS8#TRPBF equivalent, key selection criteria include its guaranteed –40°C to +85°C industrial temperature grade, 8-lead SOIC (S8) package compatibility with legacy 393-type comparators, and ability to drive loads referenced to voltages above V+ without external pull-ups.
Technical Context
The LT1018IS8#TRPBF implements a dual-channel, open-collector–compatible output stage with internal class-B pull-up current source-eliminating external resistors while enabling level-shifting to supplies exceeding V+. Its input stage uses laser-trimmed thin-film resistors to achieve ≤1mV offset voltage and high common-mode rejection (≥105dB) across –40°C to +85°C.
Unlike micropower variants, the LT1018 trades lower quiescent current for faster response: typical propagation delay is <10μs at 10mV overdrive, with rise/fall times under 2μs into 100kΩ load. Input bias current remains ultra-low (≤15nA typ), and the device maintains stable operation even with inputs overdriven beyond supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1V to 40V - supports single-cell battery (1.5V) up to industrial 24/36V rails without level-shifting. |
| Max Offset Voltage | 1mV - enables precise threshold detection in sensor interfaces and power monitors with ≤0.5% error at 500mV reference. |
| Supply Current (TYP) | 110μA at 5V - balances speed and efficiency for always-on battery-powered comparators. |
| Output Sink Current | 70mA - directly drives relays, LEDs, or logic inputs without external transistor buffering. |
| Input Bias Current | 15nA max - preserves accuracy in high-impedance sensor circuits (e.g., thermistors, photodiodes). |
| Common-Mode Range | Includes ground to (V+ – 0.9V) - allows direct sensing of signals referenced to system ground in single-supply systems. |
| Propagation Delay | <10μs at 10mV overdrive - suitable for kHz-range oscillator and timing applications. |
Pinout & Package
LT1018IS8#TRPBF is housed in an 8-lead plastic small-outline (SOIC-N) package, designated S8 per Linear Technology drawing #05-08-1610, with 1.27mm pitch, 3.9mm width, and JEDEC MS-012 compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN A) | Inverting input of Channel A | Accepts analog signals down to ground; differential input voltage rating ±40V. |
| 2 (+IN A) | Non-inverting input of Channel A | Supports rail-to-rail common-mode range; immune to false triggering during overdrive. |
| 3 (OUT A) | Open-collector–compatible output of Channel A | Internal pull-up eliminates external resistor; sinks up to 70mA; drives loads tied to V+ or higher. |
| 4 (V–) | Negative supply terminal | Connects to ground or negative rail; common return for both channels and outputs. |
| 5 (V+) | Positive supply terminal | Accepts 1.1V–40V; powers internal biasing, output stage, and input circuitry. |
| 6 (OUT B) | Open-collector–compatible output of Channel B | Independent of OUT A; shares same V+ and V–; enables dual-threshold or window-comparator topologies. |
| 7 (+IN B) | Non-inverting input of Channel B | Electrically identical to +IN A; supports independent signal conditioning per channel. |
| 8 (–IN B) | Inverting input of Channel B | Matches –IN A performance; enables fully differential or complementary sensing configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Internal pull-up current source | Eliminates external pull-up resistors, reducing BOM count and board space while cutting standby power in battery systems. |
| Output drives loads above V+ | Enables level-shifting to auxiliary supplies (e.g., 5V logic driving 12V relay coil) without isolation components. |
| Laser-trimmed input offset | Guarantees ≤1mV max offset over –40°C to +85°C, ensuring stable trip points in thermal and power-monitoring circuits. |
| 1.1V minimum operating voltage | Permits operation from depleted alkaline cells or energy-harvesting sources, extending battery life in remote sensors. |
| Pin-compatible with LM393/LM2903 | Direct drop-in replacement in existing designs using industry-standard dual-comparator footprints and routing. |
Applications
| Power Supply Monitor | Refrigerator Temperature Alarm |
|---|---|
Use Scenario: Detects undervoltage/overvoltage conditions on 5V or 12V DC rails in PLC I/O modules and embedded controllers. IC Role / Device Role / Timing Role: Dual comparator configured as window detector, comparing rail voltage against precision references (e.g., LT1004 1.235V). Use Value: 1mV offset ensures ±0.5% threshold accuracy; 110μA supply current enables continuous monitoring without compromising system efficiency. |
Use Scenario: Triggers audible alarm when refrigerator cabinet temperature rises above 5°C, using YSI 44011 thermistor network. IC Role / Device Role / Timing Role: Compares thermistor divider voltage against fixed reference; output drives buzzer via NPN transistor. Use Value: Rail-to-rail input includes ground, allowing direct thermistor measurement from 0°C to 5°C; 1.1V min supply supports operation from 1.5V battery backup. |
| Relay Driving Interface | Precision Tri-Wave Generator |
Use Scenario: Controls 12V automotive relays in battery management systems, interfacing between low-voltage MCU GPIO and high-side load switching. IC Role / Device Role / Timing Role: Comparator output sinks relay coil current directly; second channel provides feedback or status indication. Use Value: 70mA sink capability eliminates external driver transistor; output stage tolerates V+ = 12V while driving 24V coil via external diode clamp. |
Use Scenario: Generates synchronized triangle and square waves for calibration test equipment and function generators. IC Role / Device Role / Timing Role: One LT1018 channel acts as integrator reset comparator; second channel provides hysteresis for oscillator control. Use Value: Low input bias (15nA) prevents capacitor leakage errors in integrator; fast propagation (<10μs) ensures stable 1–10kHz waveform generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 1.5mV max offset, 250nA bias current, no internal pull-up; requires external 10kΩ pull-up. | Lower cost but less accurate; unsuitable for sub-mV threshold or ultra-low-power (<200μA) designs. | Select LM393DR only for non-critical, cost-sensitive applications where 1mV offset and 110μA current are not required. |
| LTC1040CS8#PBF | Lower 0.5mV max offset, 1.5μW avg power (1 sample/sec), rail-to-rail inputs, but slower (100μs propagation). | Better for intermittent-sampling sensor nodes; too slow for oscillators or real-time monitoring above 10Hz. | Choose LTC1040CS8#PBF when ultra-low average power dominates speed requirements, e.g., wireless sensor battery life >5 years. |
Compared with LM393DR and LTC1040CS8#PBF, LT1018IS8#TRPBF uniquely balances sub-mV precision, 110μA continuous supply current, and <10μs speed-making it optimal for always-on industrial monitors requiring both accuracy and responsiveness.
Availability
LT1018IS8#TRPBF is available at Aetrix Electronics and suitable for industrial power monitoring, battery-backed alarm systems, and relay interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1018IS8#TRPBF 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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for legacy Linear parts including the LT1018 series.
The LT1018 belongs to Linear's precision micropower comparator family, designed specifically for industrial and instrumentation applications demanding low drift, wide supply range, and robust input protection without sacrificing speed.
FAQ
What is the operating temperature range for LT1018IS8#TRPBF?
The LT1018IS8#TRPBF is specified for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in the "PACKAGE/ORDER INFORMATION" section of the datasheet, where the "I" grade denotes the –40°C to +85°C specification, and the "S8" package marking "1018I" explicitly identifies this temperature grade for LT1018IS8#TRPBF.
Does LT1018IS8#TRPBF require an external pull-up resistor on its outputs?
No, LT1018IS8#TRPBF does not require an external pull-up resistor. Its output stage integrates a class-B pull-up current source, as stated in the "DESCRIPTION" section: "The output stage includes a class 'B' pull-up current source, eliminating the need for an external resistive pull-up and saving power." This feature is inherent to the LT1018IS8#TRPBF design and applies across its full operating voltage and temperature range.
Can LT1018IS8#TRPBF drive a load referenced to a voltage higher than V+?
Yes, LT1018IS8#TRPBF can drive loads connected to a supply more positive than V+, as explicitly documented in the "DESCRIPTION": "The output stage is also designed to allow driving loads connected to a supply more positive than the device, as can comparators with open-collector output stages." This capability is enabled by its open-collector–compatible output architecture and is verified in typical applications like "Driving Relays" (TA03) and "Negative Voltage Regulator" (TA08).
Is LT1018IS8#TRPBF pin-compatible with LM393?
Yes, LT1018IS8#TRPBF is pin-compatible with LM393-type dual comparators. The "DESCRIPTION" states: "The LT1017/LT1018 are pin compatible with older dual comparators such as 393 type devices." The S8 package pinout (–IN A, +IN A, OUT A, V–, V+, OUT B, +IN B, –IN B) matches the standard LM393 SOIC-8 configuration, enabling direct PCB replacement without layout changes.
What is the maximum supply voltage rating for LT1018IS8#TRPBF?
The absolute maximum supply voltage for LT1018IS8#TRPBF is 40V, as defined in the "ABSOLUTE MAXIMUM RATINGS" table. This rating applies to the differential voltage between V+ and V– terminals and is validated across all operating conditions. Continuous operation up to 40V is supported, with electrical characteristics guaranteed up to this limit per the "ELECTRICAL CHARACTERISTICS" table conditions.
LT1018IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Pull Up
- Voltage - Supply, Single/Dual (±):
- 1.1V ~ 40V, ±0.55V ~ 20V
- :
- 1mV @ ±20V
- Voltage - Input Offset (Max):
- 0.075µA @ ±20V
- Current - Input Bias (Max):
- 70mA @ 4.5V
- Current - Output (Typ):
- 250µA
- Current - Quiescent (Max):
- 115dB CMRR, 110dB PSRR
- CMRR, PSRR (Typ):
- 6µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LT1018IS8#TRPBF FAQ
1.How can I place an order for LT1018IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1018IS8#TRPBF 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 LT1018IS8#TRPBF reliable?
The price and inventory of LT1018IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1018IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1018IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1018IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1018IS8#TRPBF?
LT1018IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1018IS8#TRPBF 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 LT1018IS8#TRPBF?
For technical support, including LT1018IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1018IS8#TRPBF requirements.
6.How does Aetrix verify that LT1018IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1018IS8#TRPBF 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 LT1018IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1018IS8#TRPBF?
All LT1018IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1018IS8#TRPBF, 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 LT1018IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1018IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1018IS8#TRPBF Tags
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LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
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