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Analog Devices Inc. LT1017IS8#PBF
- Part No.:
- LT1017IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1017IS8#PBF.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,873
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Product details
Overview
LT1017IS8#PBF from Analog Devices (formerly Linear Technology) is a micropower dual comparator optimized for ultra-low supply current (30 μA typical at 5 V), rail-to-rail input common-mode range including ground, and operation from 1.1 V to 40 V single supply. It features internal class-B pull-up current source, open-collector-compatible output stage capable of driving loads above V+, and 1 mV maximum offset voltage - enabling precision low-voltage sensing in battery-powered instrumentation.
For engineers reviewing the LT1017IS8#PBF datasheet, LT1017IS8#PBF pinout, LT1017IS8#PBF application, or LT1017IS8#PBF equivalent, key selection considerations include its 30 μA supply current at 5 V, –40°C to +85°C industrial temperature grade, 8-lead SOIC (S8) package, and compatibility with legacy LM393-style layouts while delivering superior input bias current (15 nA max) and supply voltage flexibility.
Technical Context
The LT1017IS8#PBF implements a bipolar input stage with on-chip laser trimming for low offset voltage (≤1 mV) and high DC accuracy. Its input stage supports common-mode voltages from V– to (V+ – 0.9 V), enabling ground-sensing operation without level-shifting circuitry.
The output stage uses a class-B pull-up current source instead of a resistive pull-up, eliminating external components and reducing quiescent power. It allows sinking current up to 70 mA while permitting the output to drive loads referenced to a supply more positive than V+, supporting level-translating interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 40 V single supply - enables direct operation from coin cells (1.2 V) or industrial rails (24/36 V). |
| Supply Current (Typ) | 30 μA at 5 V - supports multi-year battery life in always-on sensor monitors. |
| Input Offset Voltage (Max) | 1 mV - ensures ≤0.1% error in 1 V reference monitoring applications. |
| Input Bias Current (Max) | 15 nA - permits high-impedance sensor interfacing (e.g., thermistors, photodiodes) without significant loading error. |
| Output Sink Current (Min) | 30 mA - drives standard LEDs, small relays, or logic inputs directly without external buffers. |
| Common-Mode Range | Includes V– (ground) - eliminates need for input biasing in single-supply systems with grounded sensors. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
LT1017IS8#PBF is housed in an 8-lead plastic small-outline (SOIC-N) package (S8), 0.150-inch body width, RoHS-compliant and lead-free (#PBF). Pin 1 is marked by a dot or notch; device is orientation-sensitive with pin 1 at top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN A | Inverting input of comparator A | Accepts signal to be compared against +IN A; supports common-mode down to V–. |
| 2: +IN A | Non-inverting input of comparator A | Reference or threshold input; matched to –IN A for low input offset. |
| 3: V– | Negative supply terminal | Ground reference for single-supply operation; must be connected even if at 0 V. |
| 4: OUT A | Open-collector compatible output of comparator A | Sinks current only; requires external pull-up or relies on internal class-B pull-up (~100 μA). |
| 5: OUT B | Open-collector compatible output of comparator B | Independent sink output; electrically isolated from OUT A for dual-threshold designs. |
| 6: –IN B | Inverting input of comparator B | Second independent sensing channel; identical specs to –IN A. |
| 7: +IN B | Non-inverting input of comparator B | Second independent reference input; fully decoupled from comparator A inputs. |
| 8: V+ | Positive supply terminal | Accepts 1.1 V to 40 V; powers both comparators and internal bias networks. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 30 μA typical supply current at 5 V enables >10-year battery life in 200 mAh coin-cell applications. |
| Internal pull-up current source | Eliminates external pull-up resistor, saving board space and reducing standby power in portable devices. |
| Output drives loads above V+ | Allows interfacing with higher-voltage logic (e.g., 5 V MCU inputs) from 1.5 V supply without level shifters. |
| Rail-to-rail input common-mode range | Supports direct connection of grounded sensors (e.g., thermistor dividers) without input biasing networks. |
| Pin-compatible with LM393 | Direct drop-in replacement for legacy dual comparators in existing PCB layouts, minimizing redesign effort. |
Applications
| Refrigerator Temperature Monitor | Low-Voltage Power Supply Supervisor |
|---|---|
Use Scenario: Detecting temperature excursions in 1.5 V battery-powered refrigerator alarms using YSI 44011 thermistor. IC Role / Device Role / Timing Role: Dual comparator configured as window detector comparing thermistor voltage against upper/lower thresholds derived from LT1034 1.235 V reference. Use Value: 30 μA quiescent current extends 1.5 V alkaline cell life beyond 3 years; 1.1 V minimum operating voltage ensures reliable startup at end-of-life battery voltage. |
Use Scenario: Monitoring 5 V rail integrity in embedded controllers to trigger safe shutdown before brownout. IC Role / Device Role / Timing Role: Comparator A detects undervoltage (VIN < 4.75 V); comparator B detects overvoltage (VIN > 5.25 V) using precision resistor dividers. Use Value: 1 mV max offset ensures ±0.1% trip-point accuracy; rail-to-rail inputs allow direct connection to 5 V rail without attenuation or biasing. |
| Relay Driver Interface | Precision Tri-Wave Generator |
Use Scenario: Driving 12 V relay coils from 3.3 V microcontroller GPIO pins via open-collector output stage. IC Role / Device Role / Timing Role: LT1017IS8#PBF output sinks relay coil current while its V+ pin connects to 12 V; controller GPIO controls enable/disable via comparator input. Use Value: Output sink capability (≥30 mA) directly drives typical 12 V/400 Ω relays; ability to drive loads above V+ eliminates level-shifter ICs. |
Use Scenario: Generating stable triangle-wave clock for low-power ADC sampling in data loggers. IC Role / Device Role / Timing Role: One comparator acts as threshold detector in relaxation oscillator; second comparator provides precise 0.5–2.5 V amplitude limiting. Use Value: Low input bias current (15 nA max) prevents timing drift in high-value RC integrators; 110 dB CMRR rejects supply noise in battery-operated systems. |
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 supply current (500 μA typ), no internal pull-up, 2 mV max VOS, wider temp range (–40°C to +85°C same). | Not suitable for sub-100 μA battery systems; requires external pull-up resistors; less accurate threshold detection. | Choose LM393DR only when cost is primary constraint and 30 μA savings is not required. |
| LTC1040CS8#PBF | Lower supply current (1.5 μW per sample), rail-to-rail inputs/outputs, but slower response (>10 μs), no internal pull-up. | Better for ultra-low-power intermittent sensing; unsuitable for continuous monitoring or driving relays due to limited output drive. | Select LTC1040CS8#PBF only for duty-cycled, event-triggered applications where speed is secondary to energy per decision. |
Compared with LM393DR and LTC1040CS8#PBF, the LT1017IS8#PBF uniquely balances ultra-low 30 μA supply current, robust 30 mA output sink, internal pull-up, and 1 mV precision - making it optimal for always-on, battery-powered comparators requiring both accuracy and drive strength.
Availability
LT1017IS8#PBF is available at Aetrix Electronics and suitable for industrial sensor monitoring, portable medical devices, and battery-backed power supervisors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1017IS8#PBF 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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT1017IS8#PBF belongs to Linear's legacy micropower comparator family, designed specifically for precision, low-voltage, and battery-constrained applications where supply current, input accuracy, and output flexibility are critical.
FAQ
What is the minimum operating voltage for LT1017IS8#PBF?
The LT1017IS8#PBF operates down to 1.1 V, verified across the full –40°C to +85°C temperature range. At 1.15 V (typical minimum), it maintains functional output saturation and input common-mode range, enabling use with aging alkaline or lithium thionyl chloride cells where voltage drops below 1.2 V. This specification is explicitly guaranteed in the Electrical Characteristics table under "Minimum Operating Voltage".
Does LT1017IS8#PBF require an external pull-up resistor on its outputs?
No, the LT1017IS8#PBF incorporates an internal class-B pull-up current source (~100 μA typical), eliminating the need for external pull-up resistors in most applications. This reduces component count and standby power. However, for higher-speed switching or stronger pull-up, an external resistor may still be added - the internal source remains active and does not conflict with external components.
Can LT1017IS8#PBF drive a load referenced to a voltage higher than V+?
Yes - the LT1017IS8#PBF output stage is explicitly designed to sink current into loads tied to a supply more positive than V+. This is confirmed in the datasheet description: "output stage is also designed to allow driving loads connected to a supply more positive than the device." It enables level translation without additional transistors or ICs, e.g., interfacing a 1.5 V supply comparator to a 5 V logic input.
What is the guaranteed input offset voltage for LT1017IS8#PBF?
The LT1017IS8#PBF has a maximum input offset voltage of 1 mV over the full –40°C to +85°C operating range, as specified in the Electrical Characteristics table under "Offset Voltage". This value is guaranteed for the I-grade (industrial) version and applies under ±0.75 V ≤ VS ≤ ±20 V conditions. Typical offset is 0.4 mV at 25°C.
Is LT1017IS8#PBF pin-compatible with LM393?
Yes - the LT1017IS8#PBF is explicitly stated in the datasheet as "pin compatible with older dual comparators such as 393 type devices." Its S8 (8-lead SOIC) pinout matches LM393DR/DG in pin assignments: 1=–IN A, 2=+IN A, 3=GND/V–, 4=OUT A, 5=OUT B, 6=–IN B, 7=+IN B, 8=V+ - enabling direct replacement without PCB modification.
LT1017IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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):
- 0.015µA @ ±20V
- Current - Input Bias (Max):
- 65mA @ 4.5V
- Current - Output (Typ):
- 60µA
- Current - Quiescent (Max):
- 115dB CMRR, 110dB PSRR
- CMRR, PSRR (Typ):
- 22µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LT1017IS8#PBF FAQ
1.How can I place an order for LT1017IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1017IS8#PBF 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 LT1017IS8#PBF reliable?
The price and inventory of LT1017IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1017IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1017IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1017IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1017IS8#PBF?
LT1017IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1017IS8#PBF 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 LT1017IS8#PBF?
For technical support, including LT1017IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1017IS8#PBF requirements.
6.How does Aetrix verify that LT1017IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1017IS8#PBF 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 LT1017IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1017IS8#PBF?
All LT1017IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1017IS8#PBF, 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 LT1017IS8#PBF part is unused and in its original packaging.
Return procedure for LT1017IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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