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Analog Devices Inc. LT1011CS8#PBF
- Part No.:
- LT1011CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1011CS8#PBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,317
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Product details
Overview
LT1011CS8#PBF from Analog Devices (formerly Linear Technology) is a precision voltage comparator with open-collector output, designed for high-accuracy threshold detection in analog signal conditioning and data acquisition systems. It delivers guaranteed max 0.5mV input offset voltage, 25nA input bias current, 250ns response time, and 200,000 voltage gain - enabling reliable operation in 5V single-supply and ±15V dual-supply configurations.
For engineers reviewing the LT1011CS8#PBF datasheet, LT1011CS8#PBF pinout, LT1011CS8#PBF application, or LT1011CS8#PBF equivalent, key selection criteria include its floating transistor output (50mA sink/source), ±30V differential input capability, full DC specification at 5V supply, and compatibility with LM111-based designs requiring improved speed and input accuracy.
Technical Context
The LT1011CS8#PBF employs a bipolar input stage with matched transistors to achieve low offset drift (15µV/°C) and high common-mode rejection (94dB min). Its internal architecture supports strobe control via Pin 6 and offset balancing via Pins 5/6, enabling hysteresis implementation without external feedback to inputs.
It operates across 3V to ±18V supplies, accepts differential input voltages up to ±36V, and maintains specified performance over 0°C to 70°C. The output transistor is fully floating - collector and emitter can be independently referenced to ground, V+, or V– - allowing flexible load driving in relay, lamp, and motor control circuits.
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 error |
| Response Time | Max 250ns - supports fast edge detection in pulse generators and A/D converter timing |
| Voltage Gain | Min 200,000 - provides high noise immunity and clean switching in noisy industrial environments |
| Output Sink/Source | 50mA - drives TTL/CMOS logic, relays, LEDs, or small solenoids directly without buffer stages |
| Supply Range | Single 5V or ±3V to ±18V - simplifies power architecture in mixed-signal systems |
| Differential Input Voltage | ±30V - allows direct connection to unconditioned transducer outputs or line-voltage references |
Pinout & Package
LT1011CS8#PBF is housed in an 8-lead plastic SO (S8) package, RoHS-compliant and lead-free, with standard JEDEC SOIC-8 footprint (5.0mm × 6.2mm, 1.27mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference terminal | Provides return path for internal circuitry; used as emitter output when configured for ground-referenced loads |
| 2 (INPUT+) | Non-inverting input | Positive threshold input node; accepts common-mode voltage from V– + 0.3V to V+ – 1.5V |
| 3 (INPUT–) | Inverting input | Negative threshold input node; same common-mode range as INPUT+ |
| 4 (V–) | Negative supply rail | Supports single-supply (0V) or dual-supply (e.g., –15V); sets lower bound for input/output voltage ranges |
| 5 (BALANCE) | Offset adjustment / hysteresis node | Current injection adjusts input offset; resistor to output adds DC hysteresis for noise immunity |
| 6 (BALANCE/STROBE) | Strobe control / secondary offset node | Pulling ≥250µA forces output transistor OFF; enables synchronized sampling or gated comparison |
| 7 (OUT) | Open-collector output (collector) | Sinks up to 50mA; requires external pull-up; can be tied to voltages >V+ (up to 40V above V–) |
| 8 (V+) | Positive supply rail | Supports 3V to +18V; powers internal circuitry and defines upper common-mode limit |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible upgrade to LM111 | Direct drop-in replacement with 4× lower bias current, 6× lower offset, and 2× lower supply current |
| Fully specified at 5V single supply | Guaranteed DC parameters and 250ns response time - eliminates need for dual-rail supplies in portable systems |
| Floating output topology | Collector and emitter pins operate independently - enables load referencing to any rail (V+, GND, or V–) |
| Strobe-enabled output disable | Pin 6 current drive (≥250µA) forces high-impedance output state - supports time-multiplexed comparisons |
| Input protection with diode clamping | Withstands ±36V differential input and inputs up to 40V above V– - reduces need for external protection networks |
Applications
| Motor Speed Control | Precision RC Oscillator |
|---|---|
|
Use Scenario: Comparing tachometer feedback voltage against a reference to regulate PWM duty cycle in brushed DC motor drivers. IC Role / Device Role / Timing Role: Threshold detector generating zero-crossing or error-signal pulses that trigger gate drivers or microcontroller interrupts. Use Value: 250ns response time and 0.5mV offset enable sub-1% speed regulation accuracy even under varying load and temperature conditions. |
Use Scenario: Building a low-drift relaxation oscillator using capacitor charging/discharging controlled by comparator thresholds. IC Role / Device Role / Timing Role: Precision voltage threshold switch that defines oscillation period via RC time constant and hysteresis window. Use Value: 15µV/°C offset drift and 25nA bias current minimize frequency drift - achieving <50ppm/°C stability with NPO capacitors and metal-film resistors. |
| Peak Detector | Voltage-to-Frequency Converter |
|
Use Scenario: Capturing maximum amplitude of analog sensor signals (e.g., vibration, audio envelope) for peak-hold sampling. IC Role / Device Role / Timing Role: Comparator controlling MOSFET gate to charge storage capacitor only when input exceeds stored value. Use Value: Low input bias current prevents discharge leakage, while 50mA output sink rapidly discharges hold capacitor during reset cycles. |
Use Scenario: Converting analog process variables (e.g., pressure, temperature) into proportional pulse trains for digital transmission or isolation. IC Role / Device Role / Timing Role: Core comparator in charge-balancing integrator loop, defining pulse repetition rate based on input voltage magnitude. Use Value: Guaranteed 250ns propagation delay and 200,000 gain ensure linear frequency vs. voltage transfer function across 0–10kHz range. |
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 7mV max offset, 250nA bias current, 200ns typical response (not guaranteed), no strobe pin | Lacks BALANCE/STROBE functionality; unsuitable for synchronized or hysteresis-critical designs | Select when cost sensitivity outweighs precision requirements and strobe/hysteresis features are unnecessary |
| TLV3501CDR | CMOS input (0.5pA bias), 4.5ns response, rail-to-rail output, but only 2.7–5.5V supply range | Cannot operate on ±15V or single 12V; lacks floating output and ±30V differential input capability | Prefer for ultra-low-power, high-speed, single-supply systems where input voltage range is limited to 0–5V |
Compared with LM311DR and TLV3501CDR, LT1011CS8#PBF uniquely combines LM111 pin compatibility, wide supply flexibility (3V to ±18V), ±30V differential input tolerance, and integrated strobe/balance functions - making it optimal for industrial analog front-ends requiring robustness, precision, and design continuity.
Availability
LT1011CS8#PBF is available at Aetrix Electronics and suitable for motor control, precision instrumentation, data acquisition, and industrial automation applications requiring stable component supply and long-term manufacturability.
Supply support for LT1011CS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1011CS8#PBF belongs to ADI's legacy Linear Technology precision analog comparator family, engineered for demanding applications in test equipment, medical devices, and industrial control where accuracy, speed, and supply flexibility are critical.
FAQ
What is the operating temperature range for LT1011CS8#PBF?
The LT1011CS8#PBF is rated for 0°C to 70°C ambient operation, matching the "C" grade designation in its part number. This range covers commercial and many industrial environments where thermal management is controlled. It is not qualified for extended temperature operation like the "I" grade (–40°C to 85°C) or "M" grade (–55°C to 125°C) variants.
Can LT1011CS8#PBF drive a relay coil directly?
Yes, LT1011CS8#PBF can drive small to medium relay coils directly via its open-collector output (Pin 7), which sinks up to 50mA. For a typical 12V, 400Ω relay coil drawing 30mA, connect the coil between V+ and Pin 7, with a flyback diode across the coil. Ensure V– is grounded or at system common, and verify relay dropout voltage remains within LT1011CS8#PBF's 0.7V max saturation voltage at 30mA.
Does LT1011CS8#PBF support single-supply operation at 5V?
Yes, LT1011CS8#PBF is fully specified for single 5V operation - including guaranteed 0.5mV max input offset voltage, 250ns max response time, and 200,000 min voltage gain. Its input common-mode range extends from 0.5V to 3V, and output swings from near 0V (saturation) to V+ – 1V (high state), making it ideal for 5V microcontroller interface and battery-powered systems.
How is the STROBE function implemented on LT1011CS8#PBF?
The STROBE function on LT1011CS8#PBF is activated by sourcing ≥250µA from Pin 6 (BALANCE/STROBE) to ground or a negative voltage. This forces the output transistor OFF, resulting in a high-impedance (open) collector state. Strobe delay drops from ~300ns at 250µA to ~60ns at 3mA. Do not short Pin 6 to ground - it must be current-driven, and leakage >0.2µA can shift input offset voltage.
What package type does LT1011CS8#PBF use?
LT1011CS8#PBF uses an 8-lead plastic SO (S8) package - a surface-mount SOIC-8 variant measuring 5.0mm × 6.2mm with 1.27mm lead pitch. It is RoHS-compliant and features lead-free (Pb-free) finish, marked "1011" on the top surface. This package replaces obsolete metal-can (H) and CERDIP (J8) variants while maintaining pin compatibility.
LT1011CS8#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:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LT1011CS8#PBF FAQ
1.How can I place an order for LT1011CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1011CS8#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 LT1011CS8#PBF reliable?
The price and inventory of LT1011CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1011CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1011CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1011CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1011CS8#PBF?
LT1011CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1011CS8#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 LT1011CS8#PBF?
For technical support, including LT1011CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1011CS8#PBF requirements.
6.How does Aetrix verify that LT1011CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1011CS8#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 LT1011CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1011CS8#PBF?
All LT1011CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1011CS8#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 LT1011CS8#PBF part is unused and in its original packaging.
Return procedure for LT1011CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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