THS7376IPWR datasheet(39/61 Pages) TI

39 / 61 page

S+

External Input

and Output Pin

Internal

Circuitry

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 VPP 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 (VS+ – 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.

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.

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