THS7376 Datasheet, PDF (39/61 Pages) Texas Instruments – 4-Channel Video Amplifier with One SD and Three HD 8th-Order Filters with 6-dB Gain

THS7376
www.ti.com
SBOS692 – JUNE 2013
OPERATING VOLTAGE
The THS7376 is designed to operate from 3 V to 5 V over the –40°C to +85°C temperature range. The impact on
performance over the entire temperature range is negligible as a result of the implementation of thin film resistors
and high-quality, low-temperature coefficient capacitors. The design of the THS7376 allows operation down to
2.85 V, but TI recommends using at least a 3-V supply to ensure that no issues arise with headroom or clipping
with 100% color-saturated CVBS signals. If only 75% color-saturated CVBS is supported, then the output voltage
requirements are reduced to 2 V_PP on the output, allowing a 2.85-V supply to be used without issue.
A 0.1-μF to 0.01-μF capacitor should be placed as close as possible to the power-supply pins. Failure to do so
may result in the THS7376 outputs ringing or oscillating. Additionally, a large capacitor (such as 22 μF to 100 μF)
should be placed on the power-supply line to minimize interference with 50- and 60-Hz line frequencies.
INPUT VOLTAGE
The device input range allows for an input signal range from –0.05 V to approximately (V_S+ – 1.5 V). However,
because of the internal fixed gain of 2 V/V (+6 dB) and the internal input level shift of 105 mV (typical), the output
is generally the limiting factor for the allowable linear input range. For example, with a 5-V supply, the linear input
range is from –0.05 V to 3.5 V. However, because of the gain and level shift, the linear output range limits the
allowable linear input range to approximately –0.05 V to 2.3 V.
INPUT OVERVOLTAGE PROTECTION
The device is built using a very high-speed, complementary, BiCMOS process. The internal junction breakdown
voltages are relatively low for these very small geometry devices. These breakdowns are reflected in the
Absolute Maximum Ratings table. All input and output device pins are protected with internal ESD protection
diodes to the power supplies, as shown in Figure 129.
V_S+
External Input
and Output Pin
Internal
Circuitry
Figure 129. Internal ESD Protection
These diodes provide moderate protection to input overdrive voltages above and below the supplies as well. The
protection diodes can typically support 30 mA of continuous current when overdriven.
Copyright © 2013, Texas Instruments Incorporated
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