THS7315D - 3-Channel SDTV Video Amplifier | Texas Instruments
MPN： THS7315D ✓ 啟用中THS7315D 概覽
A video amplifier is an analog signal-conditioning IC that increases the amplitude of composite or component video signals while controlling bandwidth, attenuation, and unwanted spectral content. Within the broader semiconductor hierarchy, the THS7315D is a video amplifier, a type of analog amplifier, and ultimately an integrated circuit used within display, broadcast, set-top-box, and video-conversion systems.
The THS7315D integrates three independent SDTV video amplifier channels and fifth-order filters into one package. Its fixed gain of 5.2 V/V is useful when a source produces a relatively small video amplitude and the downstream circuitry requires additional signal swing. The fifth-order filters provide frequency-dependent noise and interference attenuation, while the single-supply architecture simplifies power planning in 3 V and 5 V systems. Texas Instruments fabricated the device using its complementary silicon-germanium BiCom3 process.
This integration reduces the number of discrete amplification and filtering stages required in a multi-channel analog video path. Because the amplifier includes filters rather than functioning only as a wideband buffer, board-level signal integrity depends on correct source and load impedances, adequate bypass capacitance, short output routing, and proper grounding. The supplied data does not provide detailed output impedance, bandwidth, settling-time, noise, or stability-versus-capacitance figures, so those characteristics must be confirmed in the manufacturer datasheet before final circuit sign-off.
Typical uses include SDTV video buffering, Y/Cb/Cr component-video distribution, CVBS and S-Video processing, RGB amplification, and DAC reconstruction filtering. The integrated three-channel arrangement is particularly useful when red, green, and blue or Y, Pb, and Pr channels must receive matched amplification and filtering. It can also support protected or industrial video equipment where reducing the number of active stages simplifies signal routing and maintenance.
A primary design consideration is ensuring that the source impedance, termination, and downstream load remain compatible with the integrated filter network. The manufacturer's datasheet and typical application information should be used to select input and output coupling or termination components. PCB layout should keep the device and its bypass capacitors close together, maintain short analog traces, provide an uninterrupted ground reference, and isolate sensitive video paths from switching and high-current return paths.
This product page consolidates the verified manufacturer and distributor information, distinguishes documented THS7315D characteristics from missing technical data, identifies verified same-package replacements, and adds practical application and layout guidance for engineers evaluating the THS7315D in SDTV video signal chains.
直接替換替代品，適用於 THS7315D — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品THS7315D 最大額定值與電氣特性
| Product Type | 3-channel SDTV video amplifier with integrated fifth-order filters |
| Number of Channels | 3 channels |
| Voltage Gain | 5.2 V/V |
| Filter Order | 5th order |
| Supply Voltage Range | 3 V to 5 V |
| Power Architecture | Single supply |
| Process Technology | Complementary silicon-germanium BiCom3 |
| Supported Video Signals | CVBS, S-Video, YPBPR 480i/576i, YUV, and GBR/RGB |
| Package Type | 8-SOIC |
| 腳位數 | 8 pins |
| 安裝類型 | Surface mount |
| 工作溫度範圍 | -40 °C to +85 °C |
| Device Type | 1 buffer |
| RoHS 狀態 | Compliant |
THS7315D 8-soic 腳位配置指南
THS7315D（8-soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： THS7315D.
請參閱 資料表 以查看完整腳位配置。
典型應用
THS7315D 適用於 6 應用s: SDTV Component Video Buffering, RGB Video Amplification, CVBS and Composite Video Conditioning, S-Video Signal Conditioning, DAC Video Reconstruction Filtering, Set-Top Box Video Output Conditioning.
SDTV Component Video Buffering
The THS7315D fits SDTV component-video buffering because it combines three channels with fixed 5.2 V/V gain and integrated fifth-order filters in one 8-SOIC package. A designer can route Y, Pb, and Pr signals through the three amplifier channels when the source requires level restoration and bandwidth control. The verified manufacturer information specifically identifies YPBPR 480i/576i as a supported format. Before release, verify the signal amplitude, source impedance, downstream load, and required bandwidth against the manufacturer datasheet, because those details determine whether the fixed gain is suitable.
RGB Video Amplification
The THS7315D can condition parallel RGB video signals because Texas Instruments identifies GBR or RGB among the device's supported formats. Its three integrated channels provide a symmetrical 5.2 V/V voltage gain for red, green, and blue paths, while the fifth-order filters limit unwanted high-frequency content. This integration can reduce the number of separate amplifier stages in a display or video-conversion board. The design must still provide appropriate source termination, clean routing, and verified output loading, and it must confirm that the required pixel or video bandwidth and signal swing remain within device limits.
CVBS and Composite Video Conditioning
The THS7315D is applicable to CVBS and composite-video conditioning because it provides integrated video amplification and fifth-order filtering for supported standard-definition signals. The 5.2 V/V gain can raise a relatively small composite-video amplitude before it reaches a downstream receiver or converter, while the filter stage attenuates selected unwanted spectral content. A practical implementation must maintain a continuous ground reference, use the filtering network specified by the manufacturer, and avoid long unprotected analog traces. Cable and source impedance should be checked because incorrect termination can alter gain and frequency response.
S-Video Signal Conditioning
The THS7315D supports S-Video because its verified feature set includes the composite video format commonly used for S-Video and supports the same 3 V to 5 V single-supply architecture found in compact consumer and industrial video equipment. The integrated fifth-order filters can condition the signal in a multi-stage video path, while the fixed 5.2 V/V gain provides a defined level increase. For a practical S-Video board, the designer should confirm connector and source impedance requirements, verify supported bandwidth, and route both video conductors away from noisy switching nodes to minimize differential pickup and visible artifacts.
DAC Video Reconstruction Filtering
The THS7315D's integrated fifth-order filters make it relevant to video reconstruction paths following digital-to-analog conversion, where unwanted imaging and high-frequency components must be controlled. The device adds 5.2 V/V voltage gain while filtering the three amplified channels, potentially reducing the number of separate gain and filter stages. Actual suitability depends on the DAC output amplitude, source impedance, required channel matching, and video bandwidth. Engineers should use the manufacturer datasheet to determine whether the fixed gain and filter characteristics meet the target system rather than treating every fifth-order video filter as interchangeable.
Set-Top Box Video Output Conditioning
The THS7315D is suitable for the analog video output section of a set-top box or broadcast receiver because it combines three conditioned channels in a single 8-SOIC package and operates from a 3 V to 5 V supply. CVBS, S-Video, YPbPR, YUV, and RGB support allows common video-conditioning functions to be consolidated around one device family. Board-level implementation should include close supply bypassing, short video traces, solid ground-plane continuity, and protection appropriate to externally connected video signals. The final amplifier choice must be confirmed against connector leakage, ESD strategy, channel bandwidth, and output swing requirements.
工程參考資料，適用於 THS7315D — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 8-SOIC |
| Brand | Texas Instruments |
| Channel Count | 3 channels |
| Voltage Gain | 5.2 V/V |
| Filter Order | 5th order |
| Supply Voltage Range | 3 V to 5 V |
| Supported Video Formats | CVBS, S-Video, YPBPR 480i/576i, YUV, GBR/RGB |
| Operating Temperature Range | -40 °C to +85 °C |
主要差異化特點
- Integrated three-channel SDTV conditioning (對比Discrete video-buffer approach)
- Single low-voltage supply operation (對比Multi-rail discrete video amplifier design)
- Broad standard-definition format support (對比Single-format CVBS-only buffer)
設計說明
Place the THS7315D close to the source and destination of the three analog video channels, and locate its supply-bypass components immediately beside the relevant power pins. Keep the video traces short, avoid routing them beneath digital clocks or switching-regulator nodes, and maintain a low-impedance ground path under the device. The supplied data confirms an 8-SOIC package and single 3 V to 5 V supply but does not provide exact capacitor values or layout guidance, so use the manufacturer datasheet and its application example for final component placement.
The THS7315D combines 5.2 V/V gain with fifth-order filtering, so source impedance and load impedance directly affect the usable frequency response. Do not substitute arbitrary termination networks: confirm the recommended source and load values from the manufacturer datasheet, keep each channel's return path continuous, and avoid long parallel runs that can increase capacitive loading and crosstalk. Verify the final channel gain, bandwidth, and output swing with the intended source and cable or board load instead of relying only on nominal no-load device specifications.
Do not confuse the THS7315D's integrated fifth-order filtering with a generic wideband video buffer or assume every THS73xx device is interchangeable. THS7315 is specifically described as a three-channel 5.2 V/V amplifier, while the supplied comparison references THS7314 and THS7313 family members with potentially different filter or supply characteristics. Verify the exact orderable MPN, channel configuration, supply range, filter response, and pinout in the current manufacturer datasheet before making a board-level substitution.
合規資訊
The verified IC-Components result identifies the THS7315D as RoHS compliant. The supplied data does not verify REACH, lead-free status, halogen-free status, conflict-minerals status, or automotive qualification.
