THS7315D

Overview

The THS7315D is a low-power, single-supply, 3-channel integrated video buffer fabricated using complementary silicon-germanium (SiGe) BiCom3 process. It operates on a supply voltage ranging from 2.85 V to 5.5 V with a typical quiescent current of 15.6 mA at 3.3 V. The device incorporates three independent channels, each featuring a fixed gain of 5.2 V/V (+14.3 dB) and a 5th-order Butterworth low-pass filter with an 8.5 MHz (-3 dB) bandwidth. It supports DC-coupled inputs with a 230 mV output level shift or AC-coupled inputs with a sync-tip clamp function. The output stage provides rail-to-rail swing within 100 mV of the rails and can drive two 75-ohm lines per channel.

Feature Summary

• Integrates three SDTV video amplifiers with built-in 5th-order low-pass filters for DAC reconstruction or ADC anti-aliasing applications.
• Features versatile input biasing options including DC coupling with internal level shifting and AC coupling with transparent sync-tip clamp.
• Provides rail-to-rail output capability allowing full dynamic range operation while supporting dual line driving per channel.

Applications

• Set-top box output video buffering
• PVR/DVD recorder output buffering
• USB-powered portable low-power video buffering

Procurement Notes

Verify the specific ordering suffix 'D' corresponds to the SOIC-8 tube package configuration rather than the 'DR' tape-and-reel variant. Confirm RoHS compliance and lead-free green manufacturing status as specified in the datasheet. Ensure handling precautions are observed due to moisture sensitivity and ESD susceptibility inherent to the SiGe BiCom3 process technology.

Selection Notes

Select this component when designing standard definition video output stages requiring integrated filtering and fixed gain. It is suitable for interfacing with DaVinci processors or other video encoders/decoders. Consider the 230 mV output shift for DC-coupled designs to prevent sync clipping. Verify that the 8.5 MHz filter bandwidth aligns with NTSC, PAL, or 480i/576i signal requirements.

Part Context

Part of the THS7315 family of 3-channel SDTV video amplifiers. Manufactured by Texas Instruments using high-speed SiGe BiCom3 process technology. Designed specifically for low-power video buffer applications in consumer electronics and professional AV equipment where space and power efficiency are critical constraints.

Replacement Considerations

THS7314D: Similar 3-channel SDTV amplifier but with different filter characteristics and gain specifications. THS7316D: 3-channel HDTV video amplifier with higher bandwidth requirements. Verify pin compatibility and electrical parameter alignment before substitution.