My Inquiry
My Account
Analog Devices Inc. LT1189CS8#TRPBF
- Part No.:
- LT1189CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1189CS8#TRPBF.pdf
- Description:
- IC AMP DIFFERENTIAL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1189CS8#TRPBF from Analog Devices (formerly Linear Technology) is a low-power, high-speed video difference amplifier optimized for ±5V or single 5V operation with closed-loop gain ≥10. It features uncommitted high-impedance differential inputs, adjustable gain/DC control via dedicated reference/feedback terminals, 35MHz bandwidth, 220V/µs slew rate, and output shutdown capability-enabling cable loop-through in video signal processing systems.
For engineers reviewing the LT1189CS8#TRPBF datasheet, LT1189CS8#TRPBF pinout, LT1189CS8#TRPBF application, or LT1189CS8#TRPBF equivalent, key selection criteria include its gain-stable architecture at AV ≥10, ±20mA output drive into 1kΩ, CMRR of 80–105dB over –2.5V to 3.5V common-mode range, and shutdown current ≤1.5mA for multiplexed cable driver designs.
Technical Context
The LT1189CS8#TRPBF implements a dual-input-stage difference amplifier topology: primary differential inputs (pins 2, 3) provide high-Z signal sensing, while auxiliary reference/feedback inputs (pins 1, 8) enable DC offset adjustment and precise gain setting via external resistor networks. Its internal biasing supports stable operation across ±2.375V to ±8V supplies.
Gain is configured as (RFB + RG)/RG, optimized for ≥10; lower gains require feedback zero compensation. The shutdown function (pin 5) forces true high-impedance output (~20kΩ || RFB) with 15mW dissipation, enabling time-multiplexed driving of shared coaxial cables without signal contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 35MHz at AV = 10 - supports NTSC/PAL video baseband and fast transient response in instrumentation amplifiers. |
| Slew Rate | 220V/µs - enables clean 10MHz sine-wave reproduction with <0.75° differential phase error. |
| Output Current | ±20mA - drives 75Ω coaxial cables directly without external buffers in loop-through configurations. |
| CMRR | 80–105dB (DC–10MHz) - rejects common-mode noise in high-voltage instrumentation front-ends (e.g., 120VP-P line interference). |
| Supply Current | 13mA typical - achieves low power consumption while maintaining 35MHz bandwidth and 220V/µs slew rate. |
| Shutdown Current | ≤1.5mA - reduces system power by >90% during inactive channel periods in MUX applications. |
| Input Offset Voltage | 1.0–3.0mV - ensures <0.6% gain error at AV = 10 with 1kΩ load, critical for precision video gain blocks. |
Pinout & Package
LT1189CS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package with JEDEC MS-012AC footprint, 150°C/W junction-to-ambient thermal resistance, and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+/REF) | Reference/Non-inverting Input Control | Accepts DC reference voltage or connects to input for single-ended operation; sets common-mode level for differential mode. |
| 2 (–IN) | Inverting Input | High-impedance (30kΩ diff) terminal for differential signal subtraction; max ±170mV differential input range. |
| 3 (+IN) | Non-inverting Input | High-impedance (30kΩ diff) terminal for differential signal addition; used with pin 2 for true difference amplification. |
| 4 (V–) | Negative Supply Rail | Connects to –5V (bipolar) or ground (single-supply); pin 5 shutdown logic referenced to this node. |
| 5 (S/D) | Shutdown Control | Active-low enable: pulled to V– disables output (high-Z), draws ≤25µA; turn-off time ≤600ns. |
| 6 (OUT) | Amplified Output | Class-AB output stage delivers ±3.8V swing into 1kΩ at ±5V supply; drives 75Ω cables directly with minimal distortion. |
| 7 (V+) | Positive Supply Rail | Connects to +5V (bipolar) or +5V (single-supply); bypass with 0.1µF ceramic + 4.7µF tantalum for optimal settling. |
| 8 (–/FB) | Inverting Feedback Input | Configures closed-loop gain via RFB/RG; internal correction forces balance between input stages to minimize offset. |
Key Features
| Feature | Design Value |
|---|---|
| Differential or Single-Ended Gain Block | Configurable via pin 1 connection: differential (pins 2,3), non-inverting (pin 3 to pin 1), or inverting (pin 2 to pin 1) modes. |
| Gain-Stable Architecture | Optimized for AV ≥10; avoids instability at high frequencies without external compensation in standard configurations. |
| Cable Driver Capability | ±20mA output current and 35MHz bandwidth enable direct 75Ω coaxial cable driving without buffer stages. |
| Output Shutdown with High-Z State | Pin 5 control places output in ~20kΩ parallel impedance state, preventing bus contention in multi-amplifier cable MUX systems. |
| Low Distortion Video Performance | 0.6% differential gain / 0.75° differential phase error at 3.58MHz (NTSC) ensures broadcast-grade color fidelity. |
Applications
| Video Line Receiver | Instrumentation Amplifier Front-End |
|---|---|
Use Scenario: Receiving composite video signals over 75Ω coaxial cable in broadcast equipment or medical imaging displays. IC Role / Device Role / Timing Role: Difference amplifier converting differential camera output to single-ended baseband signal with DC restoration. Use Value: 35MHz bandwidth preserves luminance detail; 48dB worst-case CMRR suppresses 120VP-P power-line interference riding on signal. | Use Scenario: Amplifying low-level transducer outputs (e.g., strain gauges, thermocouples) in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Precision difference amplifier with adjustable gain and DC offset correction for sensor signal conditioning. Use Value: 1.0–3.0mV input offset voltage and 80–105dB CMRR ensure µV-level resolution despite high common-mode noise. |
| Cable Loop-Through Distribution | Multi-Channel Video MUX System |
Use Scenario: Distributing one video source to multiple monitors while preserving signal integrity through daisy-chained BNC connections. IC Role / Device Role / Timing Role: Cable sense amplifier providing gain-adjustable loop-through path with DC level shifting. Use Value: Output shutdown (pin 5) allows dynamic channel selection without physical relays; ±20mA drive sustains signal over 100m cable runs. | Use Scenario: Time-division multiplexing of four camera feeds onto a single coaxial backbone in security DVR systems. IC Role / Device Role / Timing Role: Synchronized video difference amplifier with fast (<600ns) shutdown enabling glitch-free channel switching. Use Value: 15mW shutdown power minimizes thermal load; 220V/µs slew rate prevents edge smearing during 1MHz square wave gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1193CS8#TRPBF | Higher supply current (16mA), wider bandwidth (50MHz), no shutdown pin; pin-compatible but not functionally identical. | Used where maximum speed is prioritized over power savings; unsuitable for MUX/cable-sharing architectures requiring shutdown. | Select LT1193CS8#TRPBF only if 50MHz bandwidth is required and shutdown functionality is unnecessary. |
| AD8132ARZ | 350MHz bandwidth, 1200V/µs slew rate, differential output; requires external resistors for gain setting and lacks integrated shutdown. | Targeted at high-speed ADC drivers and RF IF stages-not optimized for 75Ω video cable driving or low-power loop-through. | Choose AD8132ARZ for >100MHz signal chains; avoid for legacy video infrastructure where LT1189CS8#TRPBF's cable drive and shutdown are essential. |
Compared with LT1193CS8#TRPBF and AD8132ARZ, the LT1189CS8#TRPBF uniquely balances 35MHz video bandwidth, ±20mA cable drive, and integrated shutdown-making it the only option among the three qualified for low-power, multiplexed coaxial distribution without external logic or buffers.
Availability
LT1189CS8#TRPBF is available at Aetrix Electronics and suitable for video line receivers, instrumentation amplifier front-ends, cable loop-through distribution, and multi-channel video MUX systems requiring stable component supply across industrial temperature ranges (0°C to 70°C).
Supply support for LT1189CS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT1189 product line was designed specifically for precision video difference amplification and high-voltage instrumentation front-ends, emphasizing gain stability, cable drive capability, and low-power shutdown in ±5V and single 5V systems.
FAQ
What is the minimum recommended closed-loop gain for stable operation of the LT1189CS8#TRPBF?
The LT1189CS8#TRPBF is optimized for closed-loop gains ≥10. Operating below this gain risks instability unless compensated with a feedback capacitor (CFB) across RFB. At AV = 10, the device achieves 35MHz bandwidth and 220V/µs slew rate without external compensation. For AV = 4, CFB = 5pF is required per the datasheet's AI05/AI08 figures. The LT1189CS8#TRPBF's internal compensation is tailored to maintain phase margin above 65° only when gain ≥10.
How does the shutdown feature of the LT1189CS8#TRPBF behave electrically during active and inactive states?
When pin 5 (S/D) is pulled to V–, the LT1189CS8#TRPBF enters shutdown: output impedance rises to ~20kΩ in parallel with external feedback resistors, supply current drops to ≤1.5mA, and power dissipation falls to 15mW. During normal operation (pin 5 open or at ≥0.6V above V–), the output delivers ±20mA into 1kΩ with 35MHz bandwidth. Turn-off time is ≤600ns; turn-on time is ≤500ns. The LT1189CS8#TRPBF maintains this behavior across 0°C to 70°C ambient.
Can the LT1189CS8#TRPBF operate from a single 5V supply, and what are the input/output voltage limitations in that configuration?
Yes, the LT1189CS8#TRPBF supports single 5V operation (VS+ = 5V, VS– = 0V). In this mode, the input common-mode range is 2.0V to 3.5V, output swing is 0.15V to 4.0V (RL = 300Ω), and gain error remains ≤3.5% at AV = 10. Pin 1 (+/REF) must be biased to 2.5V (e.g., via resistor divider), and RFB2 connects to VREF instead of ground. The LT1189CS8#TRPBF's rail-to-rail input stage enables full utilization of the 5V supply while maintaining 30MHz small-signal bandwidth.
What is the maximum differential input voltage the LT1189CS8#TRPBF can handle before output saturation or damage?
The absolute maximum differential input voltage (VIN LIM) for the LT1189CS8#TRPBF is ±170mV-exceeding this causes output clipping but not damage. This limit applies to the voltage between pins 2 (–IN) and 3 (+IN). The input voltage range relative to supplies is ±VS, meaning inputs may swing from –2.5V to 3.5V in ±5V operation. Differential signals beyond ±170mV will compress the output linearly; the LT1189CS8#TRPBF does not include input clamping diodes, so external protection is required for overvoltage transients.
How does the LT1189CS8#TRPBF achieve high CMRR in high-voltage instrumentation applications?
The LT1189CS8#TRPBF achieves 80–105dB CMRR through matched input transistor pairs and laser-trimmed resistors in its differential input stage. In high-voltage applications (e.g., 120VP-P common-mode), external attenuation resistors (100:1 ratio) reduce the input common-mode signal before it reaches the LT1189CS8#TRPBF, while the internal CMRR rejects residual imbalance. The LT1189CS8#TRPBF's topology allows this attenuation without sacrificing bandwidth-verified in AI03 where worst-case CMRR remains 48dB after 100:1 attenuation. This enables accurate measurement of mV-level differential signals atop kV-level common-mode voltages.
LT1189CS8#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
- Applications:
- Differential
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- 35 MHz
- Slew Rate:
- 220V/µs
- Current - Supply:
- 13 mA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply, Single/Dual (±):
- 4.75V ~ 16V, ±2.38V ~ 8V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SO
LT1189CS8#TRPBF FAQ
1.How can I place an order for LT1189CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1189CS8#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 LT1189CS8#TRPBF reliable?
The price and inventory of LT1189CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1189CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1189CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1189CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1189CS8#TRPBF?
LT1189CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1189CS8#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 LT1189CS8#TRPBF?
For technical support, including LT1189CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1189CS8#TRPBF requirements.
6.How does Aetrix verify that LT1189CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1189CS8#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 LT1189CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1189CS8#TRPBF?
All LT1189CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1189CS8#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 LT1189CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1189CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1189CS8#TRPBF 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…
