My Inquiry
My Account
Analog Devices Inc. LT1191CN8#PBF
- Part No.:
- LT1191CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1191CN8#PBF.pdf
- Description:
- IC AMP GENERAL PURPOSE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,120
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1191CN8#PBF from Analog Devices (formerly Linear Technology) is an ultrahigh-speed voltage-feedback operational amplifier optimized for ±5V and single 5V supply operation, delivering 90MHz gain-bandwidth product, 450V/µs slew rate, ±50mA output drive, 110ns settling time to 0.1%, and integrated output shutdown. It serves as a video cable driver, fast integrator, and pulse amplifier in broadcast, instrumentation, and high-speed data acquisition systems.
For engineers reviewing the LT1191CN8#PBF datasheet, LT1191CN8#PBF pinout, LT1191CN8#PBF application, or LT1191CN8#PBF equivalent, key selection criteria include full-power bandwidth (23.9MHz at 6VP-P), differential gain/phase error (0.07%/0.02° @ 1kΩ), shutdown current (1.4mA typ), input offset voltage (2–6mV), and PDIP-8 compatibility with standard op-amp layouts.
Technical Context
The LT1191CN8#PBF employs a voltage-feedback architecture with unity-gain stability and high open-loop gain (>20V/mV min at 1kΩ load). Its internal compensation enables stable operation at AV = 1 while maintaining 90MHz GBW and low distortion across video bandwidths.
It integrates a dedicated shutdown terminal (Pin 5) that reduces supply current to 1.4mA typ and places the output in true high-impedance state (15kΩ || feedback network), enabling time-division multiplexing of multiple amplifiers onto shared video lines without signal contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 90MHz - Enables stable closed-loop gain ≥1 with bandwidth up to 90MHz; supports NTSC/PAL video reconstruction. |
| Slew Rate | 450V/µs - Supports clean 7.5VP-P output into 100Ω at ±5V supplies; critical for pulse fidelity and fast step response. |
| Settling Time | 110ns to 0.1% - Measured on 3V step; ensures sub-120ns accuracy in ADC buffer and DAC I/V stages. |
| Differential Gain/Phase Error | 0.07% / 0.02° @ RL = 1kΩ - Meets broadcast-grade video linearity requirements for composite video signals. |
| Output Current | ±50mA - Drives double-terminated 75Ω coaxial cables (150Ω total load) with minimal droop or distortion. |
| Shutdown Supply Current | 1.4mA typ - Reduces quiescent power to 15mW during inactive periods; enables low-power MUX architectures. |
| Input Offset Voltage | 2–6mV (N8 package, 0°C to 70°C) - Allows DC-coupled video and precision signal conditioning without external trimming. |
Pinout & Package
LT1191CN8#PBF is housed in an 8-pin plastic DIP (PDIP-8, N8 package) with industry-standard dual-in-line pinout and 0.300-inch body width. Pin 1 is bottom-left corner when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BAL (Balance) | Offset null adjustment terminal; connects to wiper of 1kΩ–10kΩ potentiometer for fine VOS trimming. |
| 2 | –IN (Inverting Input) | Differential input node; requires low-impedance source (<10kΩ) to preserve phase margin and bandwidth. |
| 3 | +IN (Noninverting Input) | Differential input node; referenced to common-mode range (–2.5V to +3.5V @ ±5V supplies). |
| 4 | V– (Negative Supply) | Ground reference for single-supply operation or –5V rail for dual-supply; SHDN pin referenced to this node. |
| 5 | SHDN (Shutdown) | Active-low enable; pulled to V– to disable output and reduce ICC to 1.4mA; tOFF = 400ns, tON = 100ns. |
| 6 | OUT (Output) | Class-AB output stage capable of ±50mA; presents high-Z state in shutdown (15kΩ || feedback network). |
| 7 | V+ (Positive Supply) | +5V (single-supply) or +5V rail (dual-supply); supports operation up to ±8V total supply (18V VS). |
| 8 | BAL (Balance) | Second offset null terminal; tied to opposite end of potentiometer from Pin 1 for symmetric trimming. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable wideband operation | 90MHz GBW with no external compensation required - simplifies layout and eliminates stability tuning. |
| Video-optimized linearity | 0.07% differential gain / 0.02° differential phase error at 1kΩ load - meets broadcast video fidelity standards. |
| Heavy-load full-power bandwidth | 23.9MHz at 6VP-P into 1kΩ - sustains high-slew performance under realistic video and pulse loads. |
| True high-impedance shutdown | 15kΩ output impedance in shutdown state - prevents loading or crosstalk in multiplexed video bus architectures. |
| Single-supply capability | Operates from +5V only with input CMR = –2.5V to +3.5V and output swing = 0.25V to 3.8V - enables portable and low-voltage systems. |
Applications
| Composite Video Distribution | High-Speed Data Acquisition Buffer |
|---|---|
|
Use Scenario: Driving multiple downstream monitors or recording devices from a single SDI-to-analog converter output. IC Role / Device Role / Timing Role: Cable driver with double-termination support (75Ω series + 75Ω shunt) and 0.07% differential gain correction. Use Value: Preserves color fidelity and sync timing integrity over 100m coaxial runs without ghosting or hue shift. |
Use Scenario: Isolating and amplifying outputs from high-resolution SAR ADCs before FPGA capture. IC Role / Device Role / Timing Role: Low-settling-time buffer (110ns to 0.1%) with ±50mA drive for driving 50Ω transmission lines. Use Value: Maintains 16-bit effective resolution by limiting aperture uncertainty to <120ps per sample. |
| Video Multiplexer (MUX) Switching | Pulse Amplifier for Time-of-Flight Sensors |
|
Use Scenario: Selecting between four camera inputs feeding a single video processor using time-division gating. IC Role / Device Role / Timing Role: Shutdown-enabled op-amp with 100ns turn-on and 400ns turn-off; noninverting configuration mandatory. Use Value: Eliminates inter-channel leakage and glitching during switching; supports >1MHz MUX rates. |
Use Scenario: Amplifying narrow laser pulse returns (5–20ns width) in industrial LIDAR or medical ultrasound receivers. IC Role / Device Role / Timing Role: Fast integrator/pulse amplifier with 450V/µs slew rate and 1.25ns rise time (10–90%). Use Value: Resolves sub-nanosecond timing jitter and preserves pulse edge integrity for accurate time-of-flight measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1363CN8#PBF | Higher slew rate (1000V/µs), lower supply current (7.5mA max), but reduced open-loop gain (12V/mV typ @ 100Ω) and no shutdown pin. | Lacks integrated shutdown; unsuitable for MUX or power-gated video paths; better for continuous high-fidelity pulse amplification. | Select LT1363CN8#PBF when maximum speed and low quiescent current outweigh need for shutdown and video-grade linearity. |
| LT1813CS8#PBF | Higher GBW (100MHz), higher slew rate (750V/µs), SO-8 only, no BAL pins for offset nulling, shutdown not supported. | Not pin-compatible; requires PCB redesign; lacks offset trim and video-optimized AC specs (no diff gain/phase data published). | Choose LT1813CS8#PBF only for new designs prioritizing bandwidth/speed over legacy compatibility, trim capability, or broadcast compliance. |
Compared with LT1191CN8#PBF, LT1363CN8#PBF offers superior speed/power trade-off but sacrifices shutdown and video linearity; LT1813CS8#PBF delivers higher bandwidth in surface-mount form but removes analog trim and video validation - making LT1191CN8#PBF uniquely suited for cost-sensitive, pin-compatible, broadcast-compliant DIP-based video infrastructure.
Availability
LT1191CN8#PBF is available at Aetrix Electronics and suitable for video distribution systems, high-speed data acquisition front-ends, and time-of-flight sensor signal chains requiring stable component supply, long-lifecycle support, and through-hole manufacturability.
Supply support for LT1191CN8#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 technical and manufacturing continuity for legacy Linear op-amps including the LT1191 family.
The LT1191CN8#PBF belongs to Linear's ultrahigh-speed op-amp product line, designed specifically for broadcast video, instrumentation, and pulse-amplification applications where speed, linearity, and robust output drive must coexist at low cost.
FAQ
What is the maximum full-power bandwidth of the LT1191CN8#PBF?
The LT1191CN8#PBF achieves a typical full-power bandwidth of 23.9MHz at 6VP-P output into a 1kΩ load. This is derived directly from its 450V/µs slew rate using FPBW = SR/(2π × VP). At heavier loads (e.g., 100Ω), full-power bandwidth drops to 20MHz, still sufficient for 720p60 video reconstruction.
Does the LT1191CN8#PBF support single-supply operation?
Yes, the LT1191CN8#PBF operates from a single +5V supply with input common-mode range from –2.5V to +3.5V and output swing from 0.25V to 3.8V (RL = 100Ω). This allows direct interfacing with CMOS logic and low-voltage ADCs without level-shifting circuitry.
How does the shutdown feature of the LT1191CN8#PBF behave electrically?
When Pin 5 (SHDN) is pulled to V–, the LT1191CN8#PBF disables its output stage, reducing supply current to 1.4mA typ and presenting a true high-impedance output (15kΩ in parallel with external feedback resistors). Output turn-off time is 400ns and turn-on time is 100ns into a 1kΩ load.
Can the LT1191CN8#PBF drive double-terminated 75Ω video cables?
Yes - the LT1191CN8#PBF delivers ±50mA output current, enabling it to drive double-terminated 75Ω coaxial cables (150Ω total load) with 6dB gain compensation. Its 0.07% differential gain and 0.02° differential phase error at 1kΩ confirm suitability for NTSC/PAL video signal integrity.
What is the purpose of Pins 1 and 8 (BAL) on the LT1191CN8#PBF?
Pins 1 and 8 are balance terminals for offset nulling. A 1kΩ–10kΩ potentiometer is connected between them, with its wiper grounded, allowing adjustment of input offset voltage over a ±100mV range - critical for DC-coupled video and precision integrator applications.
LT1191CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- General Purpose
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- -
- Slew Rate:
- 450V/µs
- Current - Supply:
- 32 mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply, Single/Dual (±):
- 4.75V ~ 16V, ±2.38V ~ 8V
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-PDIP
LT1191CN8#PBF FAQ
1.How can I place an order for LT1191CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1191CN8#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 LT1191CN8#PBF reliable?
The price and inventory of LT1191CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1191CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1191CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1191CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1191CN8#PBF?
LT1191CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1191CN8#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 LT1191CN8#PBF?
For technical support, including LT1191CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1191CN8#PBF requirements.
6.How does Aetrix verify that LT1191CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1191CN8#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 LT1191CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1191CN8#PBF?
All LT1191CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1191CN8#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 LT1191CN8#PBF part is unused and in its original packaging.
Return procedure for LT1191CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1191CN8#PBF Tags
-
LT6552CS8#PBF
Analog Devices Inc.
-
LT6205IS5#TRPBF
Analog Devices Inc.
-
LT6206IMS8#TRPBF
Analog Devices Inc.
-
LT6552CDD#PBF
Analog Devices Inc.
-
LT6552IS8#PBF
Analog Devices Inc.
-
LT1252CS8#PBF
Analog Devices Inc.
-
AD818ARZ-REEL7
Analog Devices Inc.
-
MAX4310EUA+
Analog Devices Inc./Maxim Integrated
-
AD829ARZ
Analog Devices Inc.
-
AD810ARZ
Analog Devices Inc.
-
MAX4310ESA+
Analog Devices Inc./Maxim Integrated
-
MAX4313ESA+
Analog Devices Inc./Maxim Integrated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
