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Analog Devices Inc. LT1011AIS8#TRPBF
- Part No.:
- LT1011AIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1011AIS8#TRPBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
LT1011AIS8#TRPBF from Analog Devices (formerly Linear Technology) is a precision voltage comparator with open-collector output, designed for high-accuracy signal threshold detection in industrial and instrumentation systems. It delivers guaranteed max 0.5mV input offset voltage, 25nA input bias current, 250ns response time, and operates from single 5V or dual ±15V supplies. It drives 50mA loads and supports differential input voltages up to ±30V.
For engineers reviewing the LT1011AIS8#TRPBF datasheet, LT1011AIS8#TRPBF pinout, LT1011AIS8#TRPBF application, or LT1011AIS8#TRPBF equivalent, this page provides verified specifications, package mapping to 8-lead SOIC, real-world timing behavior under overdrive, and validated alternatives for precision comparator selection in A/D converters, motor control, and peak detection circuits.
Technical Context
The LT1011AIS8#TRPBF uses a bipolar input stage enabling low offset drift (15µV/°C) and rail-to-rail input common-mode range (–14.5V to +13V at ±15V supplies). Its floating transistor output supports load referencing to ground, V+, or V–, with 40V collector-to-V– rating and 50mA sink/source capability.
It integrates dual-purpose pins: Pin 5 (BALANCE) enables offset trimming or hysteresis; Pin 6 (BALANCE/STROBE) accepts ≥500µA current to force output high, with strobe delay as low as 60ns at 3mA drive. Input protection tolerates ±36V differential voltage and clamping diodes support fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 0.5mV - ensures ≤0.5mV error in threshold detection at 25°C, critical for 12-bit ADC front-ends. |
| Input Bias Current | Max 25nA - enables high-impedance sensor interfaces without significant DC error from source resistance. |
| Response Time | Max 250ns at 5mV overdrive - guarantees sub-250ns decision latency in pulse generators and relay drivers. |
| Supply Range | Single 5V or dual ±3V to ±18V - supports direct integration into 5V logic systems and legacy ±15V analog rails. |
| Output Sink Current | 50mA - directly drives TTL/CMOS inputs, LEDs, relays, or small solenoids without external buffers. |
| Common-Mode Range | –14.5V to +13V (±15V supplies) - allows input signals near supply rails, e.g., in motor phase sensing. |
| Differential Input Voltage | ±30V - permits direct connection across high-side current shunts or transformer secondaries. |
Pinout & Package
LT1011AIS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package, RoHS-compliant, with 1.27mm lead pitch and JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry; used as emitter output when configured for ground-referenced loads. |
| 2 (INPUT+) | Non-inverting input | Positive input node of differential pair; accepts common-mode voltages up to V+ – 1.5V. |
| 3 (INPUT–) | Inverting input | Negative input node; differential voltage up to ±30V allowed relative to other input. |
| 4 (V–) | Negative supply | Connects to negative rail; collector output rated for up to 40V above this pin. |
| 5 (BALANCE) | Offset adjustment / hysteresis | Current injection adjusts input offset; resistor to output adds DC hysteresis (≈0.45mV/µA). |
| 6 (BALANCE/STROBE) | Strobe control / offset trim | Sinking ≥500µA forces output high; must be current-driven, not grounded. |
| 7 (OUTPUT) | Open-collector output | Collector of internal NPN transistor; sinks current when active, floats when off. |
| 8 (V+) | Positive supply | Connects to positive rail; powers input stage and output transistor base drive. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed offset drift | 15µV/°C - ensures stable threshold accuracy across –40°C to +85°C industrial temperature range. |
| Single-supply operation | Fully specified at 5V - eliminates need for dual supplies in microcontroller-based systems. |
| High-voltage differential input | ±30V rating - enables direct interface to isolated sensors or power-stage feedback without attenuators. |
| Strobe-enabled output disable | 60ns strobe delay at 3mA - synchronizes comparator decisions with system clocks in sampled-data applications. |
| Low input capacitance | 6pF - minimizes phase shift and instability when driving long traces or capacitive loads. |
Applications
| Motor Speed Control | Precision RC Oscillator |
|---|---|
Use Scenario: Comparing tachometer feedback voltage against a reference to regulate PWM duty cycle in BLDC motor drives. IC Role / Device Role / Timing Role: Threshold detector generating zero-crossing pulses for commutation timing and closed-loop speed regulation. Use Value: 250ns response ensures accurate timing at >10kHz commutation frequencies; 50mA sink drives gate driver enable inputs directly. | Use Scenario: Building a low-drift relaxation oscillator using capacitor charging/discharging controlled by hysteresis. IC Role / Device Role / Timing Role: Hysteresis comparator defining upper/lower thresholds to trigger charge/discharge cycles. Use Value: 0.5mV offset and 15µV/°C drift minimize frequency drift; BALANCE pin enables precise hysteresis tuning without external resistors. |
| Peak Detector | Voltage-to-Frequency Converter |
Use Scenario: Capturing maximum amplitude of analog sensor outputs (e.g., vibration, audio envelope) for digital processing. IC Role / Device Role / Timing Role: Fast comparator latching peak value onto hold capacitor via external FET switch. Use Value: 250ns response captures transients <1µs wide; ±30V input range accommodates unattenuated sensor peaks. | Use Scenario: Converting process variable voltage (e.g., pressure, temperature) into proportional pulse train for isolation or digital counting. IC Role / Device Role / Timing Role: Integrator-comparator core generating output frequency linearly proportional to input voltage. Use Value: Low 25nA bias current prevents integrator leakage error; guaranteed 250ns timing enables kHz-range conversion accuracy. |
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, 200ns typical response (not guaranteed), no strobe pin. | Lacks BALANCE/STROBE functionality; unsuitable for synchronized sampling or programmable hysteresis. | Select when cost sensitivity outweighs precision and strobe requirements; verify layout for oscillation due to higher gain-bandwidth. |
| TLV3501CDR | CMOS input (0.5pA bias), 4.5ns response, rail-to-rail output, but only 36V max supply and no open-collector output. | Cannot drive loads referenced to V+ or V–; incompatible with optocoupler or relay interfaces requiring floating output. | Choose for ultra-low-power, high-speed applications with rail-to-rail I/O; avoid where 50mA sink or supply flexibility is required. |
Compared with LM311DR and TLV3501CDR, LT1011AIS8#TRPBF uniquely combines guaranteed low offset, strobe control, open-collector flexibility, and ±30V differential input-making it irreplaceable in industrial A/D front-ends, motor controllers, and isolated feedback loops where timing integrity and interface versatility are non-negotiable.
Availability
LT1011AIS8#TRPBF is available at Aetrix Electronics and suitable for motor control systems, precision instrumentation, and industrial data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1011AIS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT1011 family was developed by Linear Technology (acquired by ADI in 2017) to deliver precision comparator performance with robustness for demanding industrial environments-emphasizing low drift, wide supply flexibility, and versatile output configuration.
FAQ
What is the operating temperature range for LT1011AIS8#TRPBF?
The LT1011AIS8#TRPBF is rated for –40°C to +85°C, matching the "I" grade specification. This industrial temperature range ensures reliable operation in motor drives, factory automation equipment, and outdoor instrumentation where ambient conditions exceed commercial limits. All key parameters-including offset voltage, response time, and supply current-are guaranteed across this full range.
Does LT1011AIS8#TRPBF support single-supply operation?
Yes, LT1011AIS8#TRPBF is fully specified for single 5V operation, including input offset voltage, response time, and output saturation. The input common-mode range extends from 0.5V to 3V (with 5V supply), and the output can sink 50mA while maintaining <0.45V saturation voltage-enabling direct interfacing with 5V microcontrollers and logic families without level-shifting.
How does the STROBE function work on LT1011AIS8#TRPBF?
The STROBE function is implemented on Pin 6 (BALANCE/STROBE): sinking ≥500µA forces the internal output transistor off, resulting in a high-impedance (open) collector state. At 3mA drive, strobe delay is ~60ns; at 500µA, delay increases to 200–300ns. The pin must be current-driven-not grounded-and leakage >0.2µA when inactive causes offset shifts, so guard traces and low-leakage PCB materials are recommended.
Can LT1011AIS8#TRPBF drive loads referenced to voltages outside its supply rails?
Yes. The LT1011AIS8#TRPBF's open-collector output allows the collector (Pin 7) to be pulled up to any voltage between V– and 40V above V–, independent of V+. For example, with V– = 0V and V+ = 5V, Pin 7 can safely drive a 24V relay coil tied to +24V. Similarly, the emitter (Pin 1) may be tied to V++ > V+, enabling high-side switching configurations confirmed in the datasheet's Typical Applications (TA05, TA06).
What is the maximum differential input voltage rating for LT1011AIS8#TRPBF?
The LT1011AIS8#TRPBF supports a maximum differential input voltage of ±30V, verified per Absolute Maximum Ratings and confirmed in Electrical Characteristics. This allows direct connection across current-sense resistors, transformer windings, or isolated signal paths without external attenuation-provided input clamping diodes limit fault current to <1mA, as detailed in the Applications Information section.
LT1011AIS8#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:
- 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:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SO
LT1011AIS8#TRPBF FAQ
1.How can I place an order for LT1011AIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1011AIS8#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 LT1011AIS8#TRPBF reliable?
The price and inventory of LT1011AIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1011AIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1011AIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1011AIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1011AIS8#TRPBF?
LT1011AIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1011AIS8#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 LT1011AIS8#TRPBF?
For technical support, including LT1011AIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1011AIS8#TRPBF requirements.
6.How does Aetrix verify that LT1011AIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1011AIS8#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 LT1011AIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1011AIS8#TRPBF?
All LT1011AIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1011AIS8#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 LT1011AIS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1011AIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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