Texas Instruments THS7313PWR

Overview

THS7313PWR from Texas Instruments is a 3-channel low-power SDTV video amplifier with I²C control, 6-dB fixed gain, SAG correction, 2:1 input MUX per channel, and selectable input bias modes (AC-sync-tip clamp, AC-bias, DC, or DC+135 mV). It operates from 2.7 V to 5 V, delivers rail-to-rail output swing within 100 mV of rails, supports 75 Ω video line driving, and targets CVBS/S-Video/Y'P'BP'R 480i/576i buffering in set-top boxes and portable video systems.

For engineers reviewing the THS7313PWR datasheet, THS7313PWR pinout, THS7313PWR application, or THS7313PWR equivalent, key selection considerations include its 8-MHz 5th-order Butterworth filter for DAC reconstruction/ADC anti-aliasing, differential gain/phase of 0.07%/0.12° (NTSC), I²C-addressable per-channel configuration, 16.6 mA total quiescent current at 3.3 V, and TSSOP-20 RoHS-compliant packaging.

Technical Context

The THS7313PWR integrates three independent video channels, each with a 2:1 analog multiplexer, programmable input bias mode (AC sync-tip clamp, AC bias, DC, or DC+135 mV shift), and dedicated SAG correction pin. Its 5th-order 8-MHz Butterworth low-pass filter is optimized for SDTV signals including composite (CVBS), S-Video, Y'U'V', G'B'R', and Y'P'BP'R 480i/576i.

Each channel features I²C-configurable mute, disable (<1 µA), and bias mode selection. The rail-to-rail output stage enables both AC- and DC-coupled outputs while driving up to two 75 Ω video lines simultaneously. Power supply rejection is 59 dB at 100 kHz, and group delay variation across channels is ≤0.5 ns at 5.1 MHz.

Key Specifications

Pinout & Package

The THS7313PWR is housed in a lead-free, RoHS-compliant TSSOP-20 package (4.4 mm × 6.5 mm, 0.65 mm pitch), optimized for high-density PCB layouts in space-constrained consumer video equipment.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video amplifier applications.

Compared with THS7314PWR and LMH6738MA/NOPB, the THS7313PWR uniquely balances SDTV-optimized filtering, per-channel I²C configurability, and ultra-low power consumption - making it the most efficient solution for 3-channel consumer video buffering where board space, component count, and power efficiency are prioritized.

Availability

THS7313PWR is available at Aetrix Electronics and suitable for set-top box output buffering, PVR/DVDR playback interfaces, and USB-powered portable video systems requiring stable component supply, long-term industrial availability, and RoHS-compliant packaging.

Supply support for THS7313PWR 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies, with leadership in high-performance signal chain and power management ICs.

The THS7313PWR belongs to TI's precision video amplifier product line, designed specifically for low-power, high-fidelity SDTV signal conditioning in consumer electronics - emphasizing integration, video-specific performance, and ease of system-level configuration.

FAQ

What is the maximum operating temperature range for the THS7313PWR?

The THS7313PWR is rated for continuous operation from –40°C to +85°C ambient temperature. Its performance parameters-including differential gain/phase, bandwidth, and offset voltage-are specified across this full industrial temperature range, and the device uses thin-film resistors and low-temperature-coefficient capacitors to minimize drift. The absolute maximum junction temperature is 125°C for long-term reliability.

Does the THS7313PWR support DC-coupled video outputs?

Yes, the THS7313PWR supports DC-coupled outputs via its selectable input bias modes, including "DC" and "DC + 135 mV" configurations. When used with DC coupling, the rail-to-rail output stage delivers full swing from near-GND to within 100 mV of Vs+, enabling sync-on-green (R'G'sB') or other embedded-sync video formats without AC coupling capacitors or clamping circuitry.

How does the SAG correction feature work on the THS7313PWR?

The THS7313PWR implements SAG correction through dedicated SAG pins (pins 14, 16, 18) per channel. When externally connected to the corresponding OUTPUT pin (e.g., CH. 1 SAG to CH. 1 OUTPUT), the internal feedback loop automatically compensates for low-frequency droop in AC-coupled video signals-eliminating the need for external SAG correction networks and preserving vertical brightness uniformity in CVBS or Y' outputs.

Can the THS7313PWR drive 75 Ω loads directly?

Yes, the THS7313PWR is explicitly characterized to drive two 75 Ω video lines simultaneously (RL = 75 Ω to GND or midrail), delivering high output voltage swing (e.g., 2.9 V min at 3.3 V supply) and low output impedance (0.75 Ω at 10 MHz). This capability enables direct connection to standard video connectors without external series resistors or buffer amplifiers.

What I²C address options are available for the THS7313PWR?

The THS7313PWR has a base I²C address of 01011 (5-bit), with two programmable bits (I2C-A1 and I2C-A0) allowing four unique addresses: 0x5A (A1=0, A0=0), 0x5B (A1=0, A0=1), 0x5C (A1=1, A0=0), and 0x5D (A1=1, A0=1). These pins are hardwired to GND or Vs+ during PCB layout to avoid bus conflicts in multi-device systems.