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Analog Devices Inc. LT1116CN8#PBF
- Part No.:
- LT1116CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1116CN8#PBF.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:140
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Product details
Overview
LT1116CN8#PBF from Analog Devices (formerly Linear Technology) is an ultrafast ground-sensing comparator with 12ns typical propagation delay, designed for precision signal detection near the negative supply rail in single- or dual-supply systems. It features complementary TTL outputs, internal latch capability, ±5V or single 5V operation, and input common-mode range extending to V–. It is used in high-speed current sensing for switching regulators and zero-crossing detection.
For engineers reviewing the LT1116CN8#PBF datasheet, LT1116CN8#PBF pinout, LT1116CN8#PBF application, or LT1116CN8#PBF equivalent, key selection considerations include its 12ns response time, latch-enable functionality, ground-sensing input stage, ±20mA output drive, and compatibility with TTL logic interfaces in fast pulse discrimination and A/D converter timing circuits.
Technical Context
The LT1116CN8#PBF employs a PNP-input buffer architecture enabling stable operation with inputs down to the negative supply rail (V–), eliminating minimum slew rate requirements. Its internal regenerative latch reduces set-up/hold times to 2ns each and supports flow-through or latched output modes via the dedicated LATCH pin.
It delivers active push-pull output drive into TTL loads without cross-conduction penalty, maintains CMRR ≥65dB over –5V to +2.5V common-mode range, and sustains stable performance across temperature (0°C to 70°C) and supply variations (V+ = 4.6V–5.4V, V– = –7V–0V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 12ns typical at 5mV overdrive - enables sub-100MHz sampling and fast edge-triggered control loops. |
| Input Offset Voltage | ±3.0mV max - supports precision threshold detection in current-sense amplifiers and V-to-F converters. |
| Common-Mode Range | V– to (V+)–2.5V - allows direct sensing of signals referenced to ground or negative rails without level-shifting. |
| Output Drive | ±20mA continuous - directly drives TTL inputs or small passive loads without external buffers. |
| Latch Enable Threshold | VIL = 0.8V, VIH = 2.0V - compatible with standard TTL and CMOS logic families for synchronous data capture. |
| Supply Range | Single 5V or dual ±5V - simplifies power design in mixed-signal systems requiring both analog and digital rails. |
| Input Overvoltage Tolerance | +IN/–IN withstand up to 15V above V– - protects against transient overshoot in line receivers and motor-control feedback paths. |
Pinout & Package
LT1116CN8#PBF is housed in an 8-lead PDIP (N8) package with 0.300-inch body width, JEDEC MS-001 compliant, RoHS/WEEE compliant (PBF suffix), and rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Q̅ OUT | Inverted output | Complementary TTL-level output; sinks 4mA min at 0.5V, sources 1mA min at 2.4V. |
| 2 - Q OUT | Non-inverted output | Complementary TTL-level output; matches Q̅ in timing and drive strength for balanced logic interfacing. |
| 3 - GND | Negative supply reference | Return path for V– when using dual supplies; serves as ground reference in single-supply mode. |
| 4 - V+ | Positive supply | Accepts 4.6V–5.4V (single 5V) or up to +7V absolute max; powers internal bias and output stage. |
| 5 - +IN | Non-inverting input | PNP-buffered input; accepts voltages from V– to (V+)–2.5V; tolerant to +15V above V–. |
| 6 - –IN | Inverting input | PNP-buffered input; identical voltage range and overvoltage tolerance as +IN. |
| 7 - V– | Negative supply | Accepts –7V to 0V; sets lower bound of input common-mode range and output swing reference. |
| 8 - LATCH | Latch enable control | Active-high TTL-compatible input; latches outputs when high; floats high if unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Enables direct detection of signals at or below ground potential without external level shifters. |
| Internal regenerative latch | Reduces required set-up/hold time to 2ns each and eliminates need for external flip-flop in sampled-data systems. |
| No minimum input slew rate | Stable operation on slow-rising/falling edges prevents false triggering in low-frequency zero-crossing applications. |
| Complementary TTL outputs | Eliminates need for external inverters in differential logic paths and simplifies interface to 74LS/ALS families. |
| Input overvoltage protection | Withstands +15V on either input relative to V–, enabling robust use in noisy industrial bus receivers and motor feedback circuits. |
Applications
| High-Speed A/D Converter Timing | Current-Sense Comparator for Switching Regulators |
|---|---|
Use Scenario: Synchronizing sample-and-hold control in flash or pipeline ADCs requiring sub-20ns decision latency. IC Role / Device Role / Timing Role: Ultrafast comparator providing precise clock-edge-aligned decision signal to initiate conversion cycle. Use Value: 12ns propagation delay ensures minimal aperture jitter and supports >25MHz effective sampling rates. | Use Scenario: Detecting peak inductor current in current-mode DC-DC controllers to terminate switch conduction. IC Role / Device Role / Timing Role: Ground-referenced comparator comparing sensed resistor voltage against reference to generate PWM shutdown signal. Use Value: Input common-mode range extending to V– allows direct connection to low-side sense resistor without offset error. |
| Zero-Crossing Detector | Fast Pulse Width Discriminator |
Use Scenario: Identifying AC line polarity transitions in solid-state relays and TRIAC firing circuits. IC Role / Device Role / Timing Role: Precision threshold detector with latch capability to capture first zero-crossing event per half-cycle. Use Value: No minimum slew rate requirement ensures reliable triggering even on distorted or low-dV/dt waveforms. | Use Scenario: Rejecting narrow noise spikes while passing valid pulses in digital communication or encoder signal conditioning. IC Role / Device Role / Timing Role: High-speed comparator with adjustable hysteresis (via external resistors) acting as pulse-width window detector. Use Value: 12ns response enables discrimination of pulses as narrow as 25ns, supporting >40MHz data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1016CN8#PBF | 10ns propagation delay; identical pinout and latch function; slightly higher input bias current (25µA vs 20µA). | Same functional scope but tighter speed spec; less suitable for low-offset precision applications due to higher VOS (±5mV vs ±3mV). | Select LT1016CN8#PBF only when 2ns faster response is critical and offset drift is not dominant. |
| LT1394CS8#TRPBF | 7ns propagation delay; single-supply only (2.7V–6V); no V– pin; rail-to-rail input; SO-8 package. | Not pin-compatible; lacks dual-supply flexibility and ground-sensing capability; requires redesign for negative-rail referenced inputs. | Choose LT1394CS8#TRPBF for space-constrained, single-rail designs where 7ns speed justifies layout change and loss of V– interface. |
Compared with LT1016CN8#PBF and LT1394CS8#TRPBF, the LT1116CN8#PBF uniquely balances 12ns speed, ground-sensing input, dual-supply operation, and latch functionality in PDIP packaging-making it optimal for legacy industrial controls and test equipment where board layout stability and negative-rail signal integrity are essential.
Availability
LT1116CN8#PBF is available at Aetrix Electronics and suitable for high-speed A/D converter timing, current-sense feedback in switching regulators, and zero-crossing detection requiring stable component supply across extended production cycles.
Supply support for LT1116CN8#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, datasheet archives, and application engineering for legacy Linear parts including the LT1116 series.
The LT1116 belongs to Linear's high-speed precision comparator product line, engineered specifically for ground-referenced signal acquisition in power conversion, instrumentation, and real-time control systems where speed, accuracy, and supply flexibility are jointly critical.
FAQ
What is the maximum operating temperature range for LT1116CN8#PBF?
The LT1116CN8#PBF is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade rating applies to the N8 (PDIP) package variant and is confirmed in the Absolute Maximum Ratings table and Order Information section of the official datasheet. The device's thermal resistance (θJA = 130°C/W) and junction temperature limit (TJMAX = 100°C) ensure reliable operation within this range under typical PCB layouts and airflow conditions. LT1116CN8#PBF does not support industrial or extended temperature grades.
Does LT1116CN8#PBF require external pull-up resistors on its outputs?
No, LT1116CN8#PBF does not require external pull-up resistors. Its outputs are actively driven in both high and low states, delivering TTL-compatible VOH ≥2.4V at 1mA source current and VOL ≤0.5V at 4mA sink current. This push-pull output stage eliminates the need for external components when interfacing with standard TTL or LS logic families. LT1116CN8#PBF's output structure is explicitly designed for direct TTL loading without additional biasing.
Can LT1116CN8#PBF operate with a single 3.3V supply?
No, LT1116CN8#PBF is not characterized or guaranteed for 3.3V single-supply operation. Its electrical specifications-including propagation delay, output voltage levels, and input common-mode range-are validated only for single 5V (V+ = 5V, V– = 0V) or dual ±5V (V+ = +5V, V– = –5V) configurations. The Absolute Maximum Rating for V+ is 7V, but the minimum recommended V+ is 4.6V to meet timing and output drive specs. Using 3.3V risks failure to meet 12ns delay or TTL output compliance. LT1116CN8#PBF must be operated at 5V nominal for guaranteed performance.
How does the latch function behave when the LATCH pin is left unconnected?
When the LATCH pin of LT1116CN8#PBF is left unconnected, it floats to a high state due to internal design, causing the outputs to remain latched in their last valid state. To achieve flow-through (transparent) operation, the LATCH pin must be actively driven low-typically via a logic gate or microcontroller GPIO. This behavior is documented in the Latch Pin Dynamics section and confirmed in the Typical Performance Characteristics (TPC18). LT1116CN8#PBF's latch is not auto-resetting; release requires pulling LATCH low, then allowing it to rise again for new data capture.
Is LT1116CN8#PBF pin-compatible with LT1016CN8#PBF?
Yes, LT1116CN8#PBF is pin-compatible with LT1016CN8#PBF. Both devices share identical 8-lead PDIP (N8) pinouts: Pin 1 = Q̅, Pin 2 = Q, Pin 3 = GND, Pin 4 = V+, Pin 5 = +IN, Pin 6 = –IN, Pin 7 = V–, Pin 8 = LATCH. This mechanical and functional compatibility is explicitly stated in the Features section ("Pin-Compatible with LT1016") and verified in the Pin Configuration diagrams for both parts. LT1116CN8#PBF can serve as a drop-in replacement where improved input offset (±3mV vs ±5mV) and latch stability are beneficial.
LT1116CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- UltraFast™
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- CMOS, Complementary, TTL
- Voltage - Supply, Single/Dual (±):
- -
- :
- 3mV @ 5V
- Voltage - Input Offset (Max):
- 20µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 38mA
- Current - Quiescent (Max):
- 90dB CMRR, 75dB PSRR
- CMRR, PSRR (Typ):
- 16ns
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-PDIP
LT1116CN8#PBF FAQ
1.How can I place an order for LT1116CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1116CN8#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 LT1116CN8#PBF reliable?
The price and inventory of LT1116CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1116CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1116CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1116CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1116CN8#PBF?
LT1116CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1116CN8#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 LT1116CN8#PBF?
For technical support, including LT1116CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1116CN8#PBF requirements.
6.How does Aetrix verify that LT1116CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1116CN8#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 LT1116CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1116CN8#PBF?
All LT1116CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1116CN8#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 LT1116CN8#PBF part is unused and in its original packaging.
Return procedure for LT1116CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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