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Analog Devices Inc. LT1011IS8#PBF
- Part No.:
- LT1011IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1011IS8#PBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:950
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Product details
Overview
LT1011IS8#PBF from Analog Devices (formerly Linear Technology) is a precision voltage comparator with open-collector output, designed for high-accuracy threshold detection in single-supply (5V) and dual-supply (±15V) systems. It delivers guaranteed max 0.5mV input offset voltage, 25nA input bias current, 250ns response time, and 50mA output sink/source capability - enabling use in 12-bit SAR A/D converters, precision RC oscillators, and motor speed control circuits.
For engineers reviewing the LT1011IS8#PBF datasheet, LT1011IS8#PBF pinout, LT1011IS8#PBF application, or LT1011IS8#PBF equivalent, key selection criteria include its –40°C to +85°C industrial temperature range, SO-8 package compatibility, differential input voltage tolerance up to ±30V, and strobe-enabled output blanking for synchronized sampling.
Technical Context
The LT1011IS8#PBF employs a bipolar input stage with matched transistor pairs to achieve low offset drift (15µV/°C) and high DC gain (≥200,000 V/mV), fully specified across its operating temperature range. Its floating open-collector output supports load referencing to ground, positive supply, or negative supply - with 40V maximum collector-to-V– rating and 50mA continuous sink capability.
Strobe functionality is implemented via Pin 6 (BALANCE/STROBE), requiring current drive (≥500µA) to force output transistor off; offset adjustment uses Pin 5 (BALANCE), allowing fine-tuning of input offset or hysteresis injection. Input common-mode range extends from 300mV above V– to 1.5V below V+, independent of supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 0.5mV - ensures ≤0.5mV error in threshold detection at room temperature |
| Input Bias Current | Max 25nA - enables high-impedance sensor interfacing without significant loading |
| Response Time | Max 250ns - supports fast edge detection in pulse generators and timing circuits |
| Output Sink Current | 50mA - drives relays, LEDs, or TTL/CMOS logic directly without external buffers |
| Supply Range | Single 5V or dual ±3V to ±18V - simplifies power architecture in mixed-voltage systems |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including motor control and instrumentation |
| Differential Input Voltage | ±30V - allows direct connection to unconditioned signals like line-synchronized inputs |
Pinout & Package
LT1011IS8#PBF is housed in an 8-lead plastic SO (S8) package, RoHS-compliant and lead-free (PBF suffix). The package measures 4.9mm × 3.9mm × 1.75mm with standard SOIC footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference terminal | Provides return path for internal bias currents; used as emitter output when configured for ground-referenced loads |
| 2 (INPUT+) | Non-inverting input | Positive input node for differential comparison; accepts common-mode voltages up to 1.5V below V+ |
| 3 (INPUT–) | Inverting input | Negative input node; differential input voltage up to full supply rails permitted |
| 4 (V–) | Negative supply pin | Connects to negative rail (or ground in single-supply); sets lower bound of input common-mode range |
| 5 (BALANCE) | Offset adjustment / hysteresis injection | Current-driven pin for trimming input offset or adding DC hysteresis (0.5mV/µA sensitivity) |
| 6 (BALANCE/STROBE) | Strobe enable / secondary offset pin | Current-sink input to force output transistor OFF; must be driven (not grounded) for reliable strobing |
| 7 (OUT) | Open-collector output collector | Active-low output node; sinks up to 50mA; can be pulled up to any voltage ≤50V above V– |
| 8 (V+) | Positive supply pin | Connects to positive rail; sets upper bound of input common-mode range and powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 250ns response time | Enables reliable timing in 1MHz+ clocked systems such as A/D conversion and pulse-width modulation |
| ±30V differential input voltage rating | Permits direct interface with unclamped transducer outputs or line-voltage-derived signals |
| Strobe-enabled output blanking | Allows synchronous sampling and noise rejection in data acquisition systems via external timing control |
| 50mA output sink capability | Eliminates need for external driver transistors when switching relays, lamps, or logic families |
| Single 5V operation support | Reduces system BOM count by enabling compatibility with modern low-voltage microcontrollers and ADCs |
Applications
| SAR A/D Converter Front-End | Precision RC Oscillator |
|---|---|
Use Scenario: Used as the comparator in a 12-bit successive-approximation ADC (e.g., with AM2504 SAR register and 7475 latch). IC Role / Device Role / Timing Role: Compares integrator output against reference to generate bit decisions during conversion cycles. Use Value: Low 0.5mV offset and 250ns response ensure <1 LSB error contribution and support ≥1.4MHz conversion clock rates. | Use Scenario: Forms the core timing element in a low-drift relaxation oscillator using precision resistors and polystyrene capacitors. IC Role / Device Role / Timing Role: Switches state at precise thresholds to define charge/discharge intervals of timing capacitor. Use Value: 15µV/°C offset drift and rejection of bias current effects yield <10ppm/°C frequency stability below 10kHz. |
| Motor Speed Controller | Peak Detector |
Use Scenario: Implements error amplifier and zero-crossing detection in closed-loop DC motor tachometer feedback systems. IC Role / Device Role / Timing Role: Compares tach signal against setpoint to generate PWM enable/disable pulses for switch-mode driver (e.g., 2N6667). Use Value: Industrial temp range (–40°C to +85°C) and 50mA output sustain reliable operation in thermally demanding motor enclosures. | Use Scenario: Captures maximum amplitude of analog signals (e.g., sensor outputs or audio envelopes) with minimal droop. IC Role / Device Role / Timing Role: Detects positive/negative peaks and triggers hold capacitor charging via external FET gate control. Use Value: High input impedance (25nA bias) prevents loading of high-Z source impedances; strobe pin enables synchronized peak capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | Higher 2mV max offset, 250nA bias current, slower 200ns typical (not guaranteed) response | Lacks strobe function and guaranteed single-5V specs; requires external pull-up | Lower-cost option where 0.5mV offset and strobe are not required |
| TLV3501CDR | Rail-to-rail input, 4.5ns propagation delay, CMOS output (push-pull), 2.7–5.5V supply only | No open-collector output or strobe pin; incompatible with dual-supply or >5V load interfaces | Better for ultra-fast, low-voltage digital systems but cannot replace LT1011IS8#PBF in industrial analog designs |
Compared with LM311DR and TLV3501CDR, the LT1011IS8#PBF uniquely combines guaranteed low offset, strobe control, wide supply flexibility, and robust open-collector output - making it irreplaceable in precision industrial timing and measurement circuits requiring deterministic behavior across temperature and supply variations.
Availability
LT1011IS8#PBF is available at Aetrix Electronics and suitable for motor speed control, precision RC oscillator design, and 12-bit SAR A/D converter front-ends requiring stable component supply across extended temperature ranges.
Supply support for LT1011IS8#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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for legacy Linear parts including the LT1011 series.
The LT1011 product line was engineered for high-precision analog signal conditioning in industrial instrumentation, data acquisition, and real-time control systems - emphasizing low drift, guaranteed AC/DC performance, and flexible output configuration.
FAQ
What is the maximum differential input voltage specification for LT1011IS8#PBF?
The LT1011IS8#PBF supports a guaranteed ±30V differential input voltage, meaning the voltage difference between INPUT+ and INPUT– may safely reach 60V total. This rating holds across the full –40°C to +85°C operating range and enables direct interface with high-voltage transducers or unclamped line-derived signals without external attenuation.
Can LT1011IS8#PBF operate from a single 5V supply?
Yes, the LT1011IS8#PBF is fully specified for single 5V operation - including input offset voltage, response time, and output saturation - unlike many comparators that only guarantee performance under dual-supply conditions. This makes LT1011IS8#PBF suitable for integration into modern low-voltage embedded systems without auxiliary supplies.
What is the purpose of the BALANCE/STROBE pin (Pin 6) on LT1011IS8#PBF?
The BALANCE/STROBE pin (Pin 6) serves dual functions: as a strobe input to force the output transistor OFF (providing high-impedance or "hi" collector state), and as a secondary offset adjustment node. For strobing, it must be current-driven (≥500µA), not grounded; for offset trim, it's used with Pin 5 in balanced configurations per the datasheet application circuits.
Does LT1011IS8#PBF have a guaranteed response time over temperature?
Yes, the LT1011IS8#PBF guarantees ≤250ns response time across its full –40°C to +85°C industrial temperature range, measured with 100mV step and 5mV overdrive into a 500Ω load tied to 5V. This specification appears in the Electrical Characteristics table under "LT1011I" grade, confirming worst-case timing behavior in real-world thermal environments.
How does the open-collector output of LT1011IS8#PBF support load referencing to different supply rails?
The LT1011IS8#PBF open-collector output (Pin 7) allows the collector to be pulled up to any voltage ≤40V above V–, enabling loads referenced to ground, negative supply, or a separate positive rail. This flexibility lets LT1011IS8#PBF interface directly with TTL, CMOS, or relay coils without level-shifting components - a key advantage over push-pull comparators.
LT1011IS8#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:
- 1
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 3V ~ 36V, ±1.5V ~ 18V
- :
- 2mV @ ±15V
- Voltage - Input Offset (Max):
- 0.065µA @ ±15V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 4mA
- Current - Quiescent (Max):
- 115dB CMRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LT1011IS8#PBF FAQ
1.How can I place an order for LT1011IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1011IS8#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 LT1011IS8#PBF reliable?
The price and inventory of LT1011IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1011IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1011IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1011IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1011IS8#PBF?
LT1011IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1011IS8#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 LT1011IS8#PBF?
For technical support, including LT1011IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1011IS8#PBF requirements.
6.How does Aetrix verify that LT1011IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1011IS8#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 LT1011IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1011IS8#PBF?
All LT1011IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1011IS8#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 LT1011IS8#PBF part is unused and in its original packaging.
Return procedure for LT1011IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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