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Renesas ISL4089IBZ-T7
- Part No.:
- ISL4089IBZ-T7
- Manufacturer:
- Renesas
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL4089IBZ-T7.pdf
- Description:
- IC AMP GENERAL PURPOSE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
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Product details
Overview
ISL4089IBZ-T7 from Intersil is a monolithic DC-restored video amplifier IC designed for single +5V supply operation in composite video signal conditioning. It integrates a high-performance video amplifier (300MHz -3dB BW at AV=1) and a sample-and-hold restore circuit with programmable DC output level via VREF pin, enabling precise black-level clamping during sync tip or back porch intervals in broadcast-grade video equipment.
For engineers reviewing the ISL4089IBZ-T7 datasheet, ISL4089IBZ-T7 pinout, ISL4089IBZ-T7 application, or ISL4089IBZ-T7 equivalent, key selection criteria include differential gain/phase accuracy (0.03%/0.05°), 300V/µs slew rate, TTL/CMOS-compatible HOLD logic interface, and SOIC-8 package compatibility with legacy EL4089 designs under +5.5V supply constraints.
Technical Context
The ISL4089IBZ-T7 implements a two-stage analog sub-system: a voltage-feedback video amplifier (A1) with rail-to-rail output swing capability (to within 10mV of GND) and a dedicated nulling, sample-and-hold restore amplifier (A2) that sources/sinks ±300µA to charge/discharge the AC-coupling capacitor. The HOLD input controls loop closure: logic "0" enables active DC offset nulling during known black-level periods; logic "1" holds the correction voltage across the input coupling capacitor during active video.
Its DC restoration operates via Equation 2 (VOUT(DC) = VREF + 10mV) and Equation 3 (VIN+ = VOUT(DC) + 1.2V), ensuring stable output DC level programming across 0V to +4.5V VREF range while maintaining differential gain/phase linearity over 0.5V–3.25V output DC swing - critical for NTSC/PAL composite video fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +5V single supply; max 5.5V - enables direct replacement of EL4089 only when supply ≤+5.5V and output never goes below ground. |
| -3dB Bandwidth | 300MHz at AV=1; 150MHz at AV=2 - supports full NTSC/PAL baseband video bandwidth with margin. |
| Differential Gain/Phase | 0.03% / 0.05° - meets broadcast-grade video accuracy requirements per NTC-7 standard. |
| Slew Rate | 300V/µs - ensures distortion-free reproduction of fast video transients (e.g., sync pulses, color burst edges). |
| 0.1dB Gain Flatness | 80MHz at AV=2 - guarantees amplitude consistency across luminance and chrominance bands in composite signals. |
| Operating Temp | -40°C to +85°C - qualified for industrial and broadcast equipment environments. |
| HOLD Logic Thresholds | VHOLD(L) ≤0.8V, VHOLD(H) ≥2.0V - compatible with standard TTL/CMOS logic drivers without level shifting. |
Pinout & Package
ISL4089IBZ-T7 is housed in an 8-lead Pb-free SOIC package (MDP0027), measuring 4.9mm × 3.9mm × 1.45mm (D = 0.193", E1 = 0.154"), with standard JEDEC SO-8 footprint and RoHS-compliant matte tin termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN- | Inverting video amplifier input | Differential input node; biased ~1.2V above GND to maintain common-mode range under +5V supply. |
| 2 IN+ | Non-inverting video amplifier input | Main signal input; internal reference sets DC level for optimal AC coupling and dynamic range. |
| 3 VREF | Restore reference voltage input | Programs final DC output level per VOUT(DC) = VREF + 10mV; accepts 0V to +4.5V. |
| 4 HOLD | DC-restore control logic input | Logic "0" closes restore loop for offset nulling; logic "1" holds correction voltage on input coupling cap. |
| 5 GND | Analog ground reference | Common return for amplifier, restore circuit, and power supply; requires low-impedance PCB plane. |
| 6 NC | No internal connection | Unbonded pad; may be tied to -5V in EL4089-replacement layouts but unused in ISL4089IBZ-T7 operation. |
| 7 VOUT | Video amplifier output | Drives 75Ω or 150Ω loads; swings to within 10mV of GND and up to 3.5V under 1kΩ load. |
| 8 V+ | Positive supply rail | +5V nominal; absolute max 5.5V; supply current 17–23mA depending on HOLD state. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-restore subsystem | Eliminates external op-amps, switches, and timing logic - reduces BOM count and layout complexity in video front-ends. |
| Single +5V operation | Removes need for dual supplies or charge pumps in portable/battery-powered video gear and embedded systems. |
| Programmable DC output level | VREF pin allows precise black-level positioning (e.g., 0V sync-tip clamp or +1V back-porch clamp) without resistor networks. |
| High-speed restore loop | 40ns enable / 20ns disable time ensures accurate sampling within horizontal blanking intervals (≤62µs hold time). |
| Broadcast-grade video fidelity | 0.03% dG / 0.05° dP performance meets SMPTE/EBU standards for professional video routing and distribution. |
Applications
| Composite Video Input Amplifier | Sync-Tip DC Restorer |
|---|---|
Use Scenario: Amplifying and conditioning composite video signals from CCTV cameras or analog set-top boxes before digitization or transmission. IC Role / Device Role / Timing Role: Primary video gain stage with integrated DC restoration; HOLD synchronized to composite sync output of EL1883 sync separator. Use Value: Maintains consistent black level and color burst amplitude across varying source levels, preventing picture lift/drop and hue shifts in downstream ADCs or encoders. | Use Scenario: Clamping the sync tip of NTSC composite video to 0V DC in broadcast studio routers and distribution amplifiers. IC Role / Device Role / Timing Role: DC-restore amplifier operating in sync-tip sampling mode; HOLD driven by EL1883 composite sync output. Use Value: Ensures active video sits at +600mV and color burst at +300mV relative to 0V sync tip - meeting SMPTE RP-168 compliance for interfacility signal exchange. |
| Back-Porch DC Restorer | Video Mixer DC Level Stabilizer |
Use Scenario: Stabilizing DC level of composite video in multi-source switchers where sync tip level is unstable or undefined. IC Role / Device Role / Timing Role: DC-restore amplifier using back-porch clamp output of EL1883; VREF set to +1V to define black level reference. Use Value: Enables reliable black-level alignment across diverse inputs (e.g., DVD players, game consoles) without requiring source-specific sync detection logic. | Use Scenario: Maintaining consistent DC offset across mixed video sources in analog video mixers and effects processors. IC Role / Device Role / Timing Role: Input-stage DC restorer for each channel; HOLD timed to horizontal blanking to avoid interference with active video. Use Value: Prevents vertical banding and brightness jumps during crossfades by eliminating DC drift between sources with different black-level references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-restored video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EL4089IWZ-T7 | Dual-supply operation (±5V); no VREF pin; fixed 0V DC restore; higher quiescent current (25mA) | Requires negative rail; not suitable for +5V-only systems; lacks programmable black-level control | Select only if existing design uses dual supplies and does not require VREF-based level adjustment. |
| LMH6732MF/NOPB | Wideband current-feedback amplifier (850MHz GBW); no integrated restore circuit; requires external S/H and logic | Higher bandwidth but adds 4+ external components; no built-in HOLD logic or VREF interface | Choose when >300MHz bandwidth is required and board space allows discrete restore implementation. |
Compared with EL4089IWZ-T7, ISL4089IBZ-T7 eliminates negative supply dependency and adds VREF programmability; compared with LMH6732MF/NOPB, it reduces component count and layout risk by integrating restore functionality - making it optimal for cost-sensitive, space-constrained +5V video front-ends.
Availability
ISL4089IBZ-T7 is available at Aetrix Electronics and suitable for composite video amplification, sync-tip clamping, back-porch restoration, and video mixer DC stabilization requiring stable component supply and long-term industrial availability.
Supply support for ISL4089IBZ-T7 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and mixed-signal semiconductor company specializing in high-performance power management, precision analog, and video interface solutions.
The ISL4089 product line was developed specifically for broadcast- and industrial-grade analog video signal conditioning, emphasizing DC accuracy, differential gain/phase linearity, and single-supply operability in legacy and new video infrastructure designs.
FAQ
What is the maximum supply voltage rating for the ISL4089IBZ-T7?
The ISL4089IBZ-T7 has an absolute maximum supply voltage of 5.5V. Operation above this level risks permanent damage. For direct replacement of EL4089, the supply must not exceed +5.5V and the output must never go below ground - conditions verified in the ISL4089IBZ-T7 datasheet Absolute Maximum Ratings table on page 2.
Can the ISL4089IBZ-T7 operate from a single +3.3V supply?
No. The ISL4089IBZ-T7 is specified only for +5V operation (typical) with 5.5V absolute maximum. Its internal biasing, output swing, and restore amplifier current drive are optimized for +5V; operation at +3.3V is not characterized and will result in degraded performance or failure to meet datasheet specifications such as 300V/µs slew rate or 0.03% differential gain.
How does the VREF pin affect the DC output level of the ISL4089IBZ-T7?
The VREF pin directly programs the DC output level per Equation 2 in the ISL4089IBZ-T7 datasheet: VOUT(DC) = VREF + 10mV. Applying 0V to VREF yields ~10mV DC output; applying +1V yields ~1.01V. This enables precise black-level positioning for sync-tip (0V) or back-porch (+1V) clamping without external resistive dividers - a core design feature confirmed on page 6.
Is the ISL4089IBZ-T7 pin-compatible with the EL4089?
The ISL4089IBZ-T7 shares identical pinout and SOIC-8 footprint with the EL4089, but pin 6 (NC) is unconnected in ISL4089IBZ-T7 whereas EL4089 uses it for -5V. Direct replacement requires verifying that the -5V net is either unused or safely tied to GND/V+, as stated on page 1 of the ISL4089IBZ-T7 datasheet.
What is the recommended value for the input coupling capacitor (CX1) in ISL4089IBZ-T7 applications?
The ISL4089IBZ-T7 datasheet recommends 4.7µF for standard horizontal sync-driven DC restoration (page 7, Figure 13). Smaller values (e.g., 0.01µF–0.1µF) increase correction speed but raise droop; larger values reduce droop but slow response. Selection depends on hold time (e.g., 62µs for NTSC) and allowable drift - detailed in the "Charge Storage Capacitor vs Droop" table on page 6.
ISL4089IBZ-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- General Purpose
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- 300 MHz
- Slew Rate:
- 300V/µs
- Current - Supply:
- 20 mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply, Single/Dual (±):
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
ISL4089IBZ-T7 FAQ
1.How can I place an order for ISL4089IBZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL4089IBZ-T7 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 ISL4089IBZ-T7 reliable?
The price and inventory of ISL4089IBZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL4089IBZ-T7 is usually 5 days.
3.What payment methods are accepted for ISL4089IBZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL4089IBZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL4089IBZ-T7?
ISL4089IBZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL4089IBZ-T7 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 ISL4089IBZ-T7?
For technical support, including ISL4089IBZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL4089IBZ-T7 requirements.
6.How does Aetrix verify that ISL4089IBZ-T7 is sourced from the original manufacturer or authorized distributors?
All ISL4089IBZ-T7 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 ISL4089IBZ-T7 meets industry standards.
7.What is the process for return or replacement of ISL4089IBZ-T7?
All ISL4089IBZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with ISL4089IBZ-T7, 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 ISL4089IBZ-T7 part is unused and in its original packaging.
Return procedure for ISL4089IBZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL4089IBZ-T7 Tags
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