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Analog Devices Inc. LT1011CS8#TRPBF
- Part No.:
- LT1011CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1011CS8#TRPBF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,814
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Product details
Overview
LT1011CS8#TRPBF 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 50mA output sink/source capability - enabling reliable operation in 12-bit SAR A/D converters, peak detectors, and motor speed control circuits.
For engineers reviewing the LT1011CS8#TRPBF datasheet, LT1011CS8#TRPBF pinout, LT1011CS8#TRPBF application, or LT1011CS8#TRPBF equivalent, this page provides verified technical context, package-specific pin functions, real-world design value of key features, and two confirmed alternative comparators with documented functional trade-offs.
Technical Context
The LT1011CS8#TRPBF employs a bipolar input stage with differential pair architecture, delivering 200,000 minimum large-signal voltage gain and ±30V differential input voltage tolerance. Its floating open-collector output supports rail-to-rail load referencing - to ground, V+, or V– - with 50V maximum collector-to-V– rating at 0°C to 70°C operating temperature.
It integrates dual-purpose pins: Pin 5 (BALANCE) enables offset trimming or hysteresis injection; Pin 6 (BALANCE/STROBE) accepts ≥500µA current drive to force output transistor off, enabling synchronized sampling in converter timing chains without external logic gates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 0.5mV - ensures ≤0.5 LSB error in 12-bit ADC reference comparison at full scale. |
| Response Time | Max 250ns at 5mV overdrive - supports >1MHz sampling in voltage-to-frequency converters. |
| Input Bias Current | Max 25nA - allows use with high-impedance RC oscillators (e.g., 10MΩ/100pF) without drift. |
| Output Sink Current | 50mA - directly drives relays, LEDs, or TTL/CMOS inputs without external buffers. |
| Supply Range | Single 5V or dual ±3V to ±18V - enables compatibility with legacy industrial 5V logic and modern low-voltage sensor interfaces. |
| Common-Mode Range | V– +0.3V to V+ –1.5V - permits direct sensing of signals near supply rails in battery-monitoring applications. |
| Offset Drift | Max 15µV/°C - contributes <±0.15mV error across 0°C to 70°C ambient, critical for precision thermocouple amplifiers. |
Pinout & Package
LT1011CS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package, RoHS-compliant, with 1.27mm pitch and JEDEC MS-012AC outline. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference terminal | Provides common return path; used as emitter output when configured for ground-referenced loads. |
| 2 (INPUT+) | Non-inverting input | Accepts positive-going threshold reference; high-impedance node requiring guarded routing in µV-level designs. |
| 3 (INPUT–) | Inverting input | Receives sensed signal; differential input voltage up to full supply range allowed with diode clamping. |
| 4 (V–) | Negative supply rail | Supports single-supply operation when tied to ground; sets lower bound for common-mode and output swing. |
| 5 (BALANCE) | Offset adjustment / hysteresis injection | 0.5mV/mA sensitivity - 10kΩ resistor from output adds ~0.45mV hysteresis centered on VOS. |
| 6 (BALANCE/STROBE) | Strobe enable / secondary offset adjust | Current-driven (≥500µA); forces output high; leakage >0.2µA induces VOS shift - must be guarded. |
| 7 (OUTPUT) | Open-collector NPN collector | Sinks up to 50mA; floats to VPULLUP; supports level-shifting to voltages beyond V+ (up to 40V above V–). |
| 8 (V+) | Positive supply rail | Accepts 3V to 18V; powers internal circuitry and defines upper common-mode limit (V+ –1.5V). |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 250ns response time | Enables sub-microsecond decision latency in closed-loop motor controllers using 10kHz PWM feedback. |
| 50mA output sink/source | Directly switches 12V/20mA relay coils or drives 74HC logic families without series resistors or buffers. |
| ±30V differential input voltage | Allows direct interface to ±15V op-amp stages or industrial 4–20mA transmitters without attenuator networks. |
| Single 5V supply operation | Eliminates need for negative rail in microcontroller-based sensor nodes, reducing BOM count and PCB area. |
| Strobe-enabled output disable | Permits synchronous blanking during ADC conversion windows, preventing metastability in sampled-data systems. |
| 0.5mV max input offset voltage | Ensures accurate zero-crossing detection in audio line receivers and precision window comparators down to 1mV thresholds. |
Applications
| SAR A/D Converter Interface | Voltage-to-Frequency Converter |
|---|---|
Use Scenario: Threshold comparison in 12-bit successive approximation ADC front-end using charge redistribution architecture. IC Role / Device Role / Timing Role: Precision comparator latching comparator output to control SAR register clock enable and bit decision logic. Use Value: 0.5mV offset and 250ns response ensure <±0.5 LSB integral nonlinearity at 1MHz conversion rate with 10V full-scale range. |
Use Scenario: Generating variable-frequency square wave proportional to input DC voltage in analog telemetry systems. IC Role / Device Role / Timing Role: Core comparator in astable multivibrator configuration with precision RC timing network. Use Value: Low 25nA bias current prevents RC time constant drift; 15µV/°C offset drift maintains <0.01% frequency stability over 0°C–70°C. |
| Precision RC Oscillator | Motor Speed Control |
Use Scenario: Low-drift oscillator generating stable clock for microcontroller peripherals or sensor excitation. IC Role / Device Role / Timing Role: Comparator with hysteresis forming relaxation oscillator core; BALANCE pin adjusts frequency trim. Use Value: Input offset drift contribution ≤10ppm/°C below 10kHz; enables 100ppm total frequency accuracy with 1% metal-film R and polystyrene C. |
Use Scenario: Tachometer feedback comparator in brushed DC motor closed-loop speed regulation. IC Role / Device Role / Timing Role: Compares filtered tach pulse amplitude against reference to generate PWM duty-cycle correction signal. Use Value: 50mA output sinks optocoupler LED directly; ±30V input range accommodates back-EMF spikes up to ±24V without clamping diodes. |
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 7.5mV max offset, 200nA bias current, 200ns typical response (not guaranteed), no strobe pin. | Lacks BALANCE/STROBE functionality; unsuitable for synchronized sampling or hysteresis tuning. | Choose for cost-sensitive, non-critical threshold detection where 15× higher offset is acceptable. |
| TLV3501CDR | CMOS input (0.5pA bias), 4.5ns response, rail-to-rail output, but only 36V max supply and no open-collector flexibility. | Cannot drive loads referenced to V– or exceed V+; incompatible with relay or optocoupler direct drive. | Choose for ultra-low-power, high-speed applications with single-supply 1.8–5.5V constraints and no floating load requirement. |
Compared with LM311DR and TLV3501CDR, LT1011CS8#TRPBF uniquely combines guaranteed low offset, strobe control, open-collector flexibility, and ±30V differential input - making it irreplaceable in precision industrial converters and motor control where timing synchronization and load versatility are mandatory.
Availability
LT1011CS8#TRPBF is available at Aetrix Electronics and suitable for SAR A/D converters, voltage-to-frequency converters, and precision RC oscillators requiring stable component supply across automotive, industrial automation, and test equipment programs.
Supply support for LT1011CS8#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 acquired Linear Technology in 2017 and maintains full product support, datasheet archives, and application engineering for legacy Linear parts including the LT1011 family.
The LT1011 series was engineered for high-precision analog signal conditioning - specifically targeting data acquisition, instrumentation, and industrial control systems demanding low drift, fast settling, and robust input/output interfacing.
FAQ
What is the guaranteed maximum input offset voltage for LT1011CS8#TRPBF?
The LT1011CS8#TRPBF has a guaranteed maximum input offset voltage of 0.5mV across its 0°C to 70°C operating temperature range. This specification is explicitly stated in the Electrical Characteristics table for the LT1011C grade under the VOS parameter, and applies to the S8 package variant LT1011CS8#TRPBF as confirmed in the Order Information section of the datasheet.
Can LT1011CS8#TRPBF operate from a single 5V supply?
Yes, LT1011CS8#TRPBF is fully specified for single 5V supply operation. The datasheet confirms guaranteed performance for all DC parameters and response time under VS = Single 5V conditions, including input voltage range (0.5V to 3V), output saturation voltage, and large-signal voltage gain - making it suitable for modern low-voltage embedded systems.
What is the function of Pin 6 (BALANCE/STROBE) on LT1011CS8#TRPBF?
Pin 6 serves dual functions: as BALANCE for offset adjustment/hysteresis injection, and as STROBE to force the output transistor into the "off" state. When used as STROBE, ≥500µA current must be sourced from this pin (not grounded) to achieve reliable output disable; voltage drops ~2V below V+ at 3mA drive, enabling precise timing control in sampled-data systems.
Does LT1011CS8#TRPBF support driving loads referenced to voltages outside its supply rails?
Yes, LT1011CS8#TRPBF's open-collector output supports loads referenced to ground, V+, V–, or any voltage between them - including voltages exceeding V+ (up to 40V above V–). This is enabled by its floating output transistor structure, which isolates collector and emitter currents when off, allowing safe interface with isolated power domains or higher-voltage peripherals.
What package type and lead finish does LT1011CS8#TRPBF use?
LT1011CS8#TRPBF uses an 8-lead plastic SOIC (S8) package with lead-free (Pb-free) finish and tape-and-reel packaging (TRPBF suffix). The datasheet's Order Information table explicitly lists "LT1011CS8#TRPBF" with "8-Lead Plastic SO" and "LEAD FREE FINISH / TAPE AND REEL" - confirming RoHS compliance and automated assembly readiness.
LT1011CS8#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
- :
- 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#TRPBF FAQ
1.How can I place an order for LT1011CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1011CS8#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 LT1011CS8#TRPBF reliable?
The price and inventory of LT1011CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1011CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1011CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1011CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1011CS8#TRPBF?
LT1011CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1011CS8#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 LT1011CS8#TRPBF?
For technical support, including LT1011CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1011CS8#TRPBF requirements.
6.How does Aetrix verify that LT1011CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1011CS8#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 LT1011CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1011CS8#TRPBF?
All LT1011CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1011CS8#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 LT1011CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1011CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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