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Analog Devices Inc. LT1011ACN8#PBF
- Part No.:
- LT1011ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1011ACN8#PBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,098
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Product details
Overview
LT1011ACN8#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 full DC specification on single 5V or dual ±15V supplies - enabling use in 12-bit SAR A/D converters and precision RC oscillators.
For engineers reviewing the LT1011ACN8#PBF datasheet, LT1011ACN8#PBF pinout, LT1011ACN8#PBF application, or LT1011ACN8#PBF equivalent, key selection criteria include input offset drift (15µV/°C), differential input voltage tolerance (±30V), output sink capability (50mA), strobe functionality (Pin 6), and compatibility with ground-, positive-, or negative-referenced loads.
Technical Context
The LT1011ACN8#PBF employs a bipolar input stage with balanced differential pair architecture, delivering high DC gain (≥200,000 V/mV) and low input offset drift. Its floating open-collector output transistor supports bidirectional load referencing - emitter or collector can serve as active output node - and allows operation with VOUT up to 40V above V–.
Strobe control via Pin 6 enables external forcing of the output transistor into cutoff, yielding high-impedance collector state. Input protection includes internal diodes permitting ±36V differential input voltage and clamping inputs to supplies without damage, provided fault current is limited to ≤1mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 0.5mV at 25°C - ensures ≤0.5mV error in threshold-setting applications like peak detectors or window comparators. |
| Input Bias Current | Max 25nA - enables high-impedance sensor interfacing (e.g., thermocouples, photodiodes) without significant loading error. |
| Response Time | Max 250ns at 5mV overdrive - supports fast edge detection in pulse generators and motor speed control feedback loops. |
| Output Sink Current | 50mA - drives relays, lamps, TTL/CMOS logic, or optocouplers directly without external buffering. |
| Supply Range | Single 5V or dual ±3V to ±18V - simplifies integration into mixed-supply systems and legacy industrial designs. |
| Differential Input Voltage | ±30V - permits direct comparison of signals referenced to different supply domains (e.g., isolated sensor outputs). |
| Offset Drift | 15µV/°C - guarantees stable threshold accuracy across 0°C to 70°C operating range without recalibration. |
Pinout & Package
LT1011ACN8#PBF is housed in an 8-lead PDIP (Plastic Dual In-line Package) with 0.3-inch width, compatible with standard through-hole PCB assembly and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference terminal | Serves as emitter output node when configured for ground-referenced loads; must be tied to system ground for standard operation. |
| INPUT+ (Pin 2) | Non-inverting input | Accepts reference or signal input; common-mode range extends to within 300mV of V– and 1.5V below V+. |
| INPUT– (Pin 3) | Inverting input | Accepts signal or reference input; polarity reverses when Pin 1 is used as output (emitter configuration). |
| V– (Pin 4) | Negative supply rail | Supports single-supply (0V) or dual-supply (–15V) operation; output collector can swing up to 40V above this pin. |
| BALANCE (Pin 5) | Offset adjustment / hysteresis node | Allows trimming input offset or adding DC hysteresis via external resistor; bypass to Pin 6 with 0.1µF capacitor if unused. |
| BALANCE/STROBE (Pin 6) | Strobe control input | Current-driven (≥500µA) to force output transistor OFF; voltage floats ~150mV below V+ at zero current. |
| OUTPUT (Pin 7) | Open-collector collector output | Sinks up to 50mA; requires external pull-up to V+, V–, or floating rail; supports level-shifting and wired-OR logic. |
| V+ (Pin 8) | Positive supply rail | Accepts 3V to 18V (single or dual); powers internal circuitry and serves as pull-up target for OUTPUT pin. |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility with LM111 | Direct drop-in replacement for LM111 in existing designs, with improved specs and no layout change required. |
| Fully specified single 5V operation | Guaranteed performance at 5V supply - eliminates need for dual-rail supplies in modern low-voltage embedded systems. |
| Floating output topology | Enables load connection to ground, V+, V–, or any intermediate rail - critical for isolated or multi-domain power systems. |
| Strobe-enabled output disable | Pin 6 allows synchronous blanking of comparator output during ADC conversion windows or multiplexed sensing cycles. |
| Input protection with ±36V differential rating | Withstands transient overvoltage events without external clamps - reduces BOM count in industrial I/O modules. |
Applications
| Motor Speed Control | Precision RC Oscillator |
|---|---|
Use Scenario: Closed-loop tachometer feedback in brushed DC motor drives using analog voltage proportional to RPM. IC Role / Device Role / Timing Role: Comparator compares tach voltage against reference to generate PWM enable/disable pulses for H-bridge driver. Use Value: 250ns response time ensures accurate timing at >1kHz commutation frequencies; 0.5mV offset minimizes speed regulation error. | Use Scenario: Low-drift timing element in programmable function generators and frequency synthesizers. IC Role / Device Role / Timing Role: Forms relaxation oscillator with precision resistor and capacitor; hysteresis set via Pin 5/6 controls frequency stability. Use Value: 15µV/°C offset drift contributes <10ppm/°C to oscillator frequency error - enabling <0.01% tempco in 10kHz designs. |
| Peak Detector | Relay/Lamp Driver |
Use Scenario: Capturing maximum amplitude of AC line voltage or sensor output in energy metering front-ends. IC Role / Device Role / Timing Role: Detects positive/negative peaks by comparing input against held capacitor voltage via diode + op-amp buffer. Use Value: 25nA input bias current prevents discharge of hold capacitor over seconds - extending peak hold duration without active refresh. | Use Scenario: Direct drive of 12V/24V electromechanical relays or incandescent indicator lamps in PLC I/O modules. IC Role / Device Role / Timing Role: Comparator output sinks relay coil current (≤50mA) with integrated transistor - eliminating external driver transistor. Use Value: 50mA sink capability meets typical 12V relay coil requirements (e.g., 240Ω, 50mA); open-collector output enables shared pull-up with status LEDs. |
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 input offset (7mV max), slower response (200ns typ but not guaranteed), no strobe pin, 50mA sink same. | Lacks strobe and precision offset spec - suitable only where timing and offset stability are non-critical. | Select LM311DR only for cost-sensitive, non-precision applications with relaxed DC accuracy requirements. |
| TLV3501CDR | CMOS input (0.5pA bias), faster (4.5ns), rail-to-rail output, but max supply 5.5V and no strobe pin. | Not usable in ±15V or single 12V systems; unsuitable for relay driving due to 50mA limit and low voltage rating. | Choose TLV3501CDR only for ultra-low-power, high-speed, single-supply <5.5V designs requiring femtoampere input leakage. |
Compared with LM311DR and TLV3501CDR, the LT1011ACN8#PBF uniquely combines strobe control, guaranteed 0.5mV offset, ±18V operation, and 50mA sink - making it irreplaceable in precision industrial timing, motor control, and multi-supply analog interfaces where all four attributes are simultaneously required.
Availability
LT1011ACN8#PBF is available at Aetrix Electronics and suitable for motor speed control, precision RC oscillator, peak detector, and relay/lamp driver applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1011ACN8#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, datasheets, and application engineering for the LT® family of precision analog ICs.
The LT1011ACN8#PBF belongs to Linear Technology's precision comparator product line, engineered for high-accuracy signal thresholding in industrial automation, test equipment, and data acquisition systems where low offset, low drift, and robust output drive are mandatory.
FAQ
What is the operating temperature range for LT1011ACN8#PBF?
The LT1011ACN8#PBF is rated for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix in its part number. This commercial-grade temperature range is validated per Absolute Maximum Ratings and Electrical Characteristics tables in the official datasheet, with all key parameters (e.g., offset voltage, response time) guaranteed across this span.
Can LT1011ACN8#PBF operate from a single 5V supply?
Yes, the LT1011ACN8#PBF is fully specified for single 5V operation - including input offset voltage, response time, and output saturation - as confirmed in the Electrical Characteristics table and Applications Information section. This capability eliminates the need for dual supplies in battery-powered or USB-powered systems.
What is the purpose of Pin 6 (BALANCE/STROBE) on LT1011ACN8#PBF?
Pin 6 serves dual functions: as a strobe input to force the output transistor OFF (yielding high-impedance collector state), and as an offset adjustment node. When used for strobing, ≥500µA current must be sourced from this pin; when unused, it should be tied to Pin 5 with a 0.1µF capacitor to prevent noise coupling.
Does LT1011ACN8#PBF support differential input voltages beyond the supply rails?
Yes, the LT1011ACN8#PBF allows ±30V differential input voltage and ±36V absolute maximum differential input, enabling safe comparison of signals referenced to different supply domains - such as isolated sensor outputs - without external clamping diodes under normal conditions.
How does the output stage of LT1011ACN8#PBF differ from standard comparators?
The LT1011ACN8#PBF features a truly floating output transistor: in the OFF state, both collector and emitter draw zero current, allowing the collector to be pulled to voltages up to 40V above V–. This enables level-shifting, wired-OR logic, and load connection to arbitrary rails - unlike fixed-emitter comparators.
LT1011ACN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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
- :
- 0.75mV @ ±15V
- Voltage - Input Offset (Max):
- 0.035µA @ ±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:
- Through Hole
- :
- 8-PDIP
LT1011ACN8#PBF FAQ
1.How can I place an order for LT1011ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1011ACN8#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 LT1011ACN8#PBF reliable?
The price and inventory of LT1011ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1011ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1011ACN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1011ACN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1011ACN8#PBF?
LT1011ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1011ACN8#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 LT1011ACN8#PBF?
For technical support, including LT1011ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1011ACN8#PBF requirements.
6.How does Aetrix verify that LT1011ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1011ACN8#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 LT1011ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1011ACN8#PBF?
All LT1011ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1011ACN8#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 LT1011ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1011ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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