feature

0.1dB gain flatness to 30MHz 0.07%/0.03° differential gain/phase error 210MHz full power - 3dB bandwidth at G=2 1100V/μs conversion rate 5mA output current (driving dual video loads) ±83mA output short circuit current output at either 3.6mA supply current per amplifier within 1.3V range of rail Minimum stable gain 3dB or 1.5V/V

application

Video Driver RGB Driver ADC Buffer S-Video Amplifier Active Filter

illustrate

The FHP3350 and FHP3450 are low cost, high performance, voltage feedback amplifiers designed for video applications. These triple and quad amplifiers consume only 3.6mA of supply current per channel and are capable of driving dual (75Ω) video loads while providing 0.1dB of gain flatness to 30MHz. Consumer video applications also benefit from a low gain of 0.07% differential gain and 0.03° differential phase error. The FHP3350 provides three outputs that can be entered in a high-impedance disabled state to allow video multiplexing or minimize power consumption. These amplifiers are designed to operate from 5V (±2.5V) to 12V (±6V) supplies. The output swings within 1.3V of either supply rails that accommodate the video signal on a single 5V supply. The FHP3350 and FHP3450 are designed in a complementary bipolar process. They offer a full power bandwidth of 210MHz and a slew rate of 1100V/µs at a supply voltage of ±5V. The combination of high performance, low power consumption and excellent video make these amplifiers ideal for use in many digital consumer video appliances as well as many general purpose , high-speed applications.

Absolute Maximum Ratings "Absolute Maximum Ratings" are values for which the safety of the device is not guaranteed. Equipment should not operate within these limits. Parameter values defined in the Electrical Characteristics table do not guarantee absolute maximum ratings. The "Recommended Operating Conditions" table defines the conditions for actual equipment operation.

Electrical Characteristics at +5V (continued) TA=25°C, VS=5V, RF=249Ω, RL=150Ω to VS/2, G=2; unless otherwise noted.

Electrical Characteristics at ±5V TA=25°C, VS=±5V, RF=249Ω, RL=150Ω to ground, G=2; unless otherwise noted.

Typical Performance Characteristics TA=25°C, VS=5V, RF=249Ω, RL=150Ω to VS/2, G=2; unless otherwise noted.

Application Information General Description

The FHP3350 and FHP3450 are low cost, high performance, voltage feedback amplifiers designed for video applications. These triple and quad amplifiers consume only 3.6mA of supply current per channel and are capable of driving dual (75Ω) video loads with 0.1dB gain flatness to 30MHz. Consumer video applications also benefit from a low differential gain of 0.07% and a differential phase error of 0.03°. The FHP3350 provides three outputs that can be entered into a high impedance disable state to allow video multiplexing or minimize power consumption. These amplifiers are designed to operate from 5V (±2.5V) to 12V (±6V) supplies. The output swings within 1.3V of either supply rails that accommodate the video signal on a single 5V supply. The FHP3350 and FHP3450 are designed in a complementary bipolar process. They offer a full power bandwidth of 210MHz and a slew rate of 1100V/µs at a supply voltage of ±5V. The combination of high performance, low power consumption, and excellent video performance make these amplifiers ideal for use in many digital consumer video equipment as well as many general-purpose, high-speed applications. Driving a capacitive load frequency response vs. CL, illustrating the response of the FHP3350 family. A small series resistor at the output of the amplifier, as shown in Figure 1, will improve stability and settling performance. Rs frequency value response vs. CL selection plot for maximum bandwidth with less than 1dB peak. For maximum flatness, use a larger Rs.

Power Dissipation: The maximum allowable internal power dissipation is straightforward. related to the maximum junction temperature. Device failure may occur if the maximum junction temperature exceeds 150°C for extended periods of time. FHP3350 and FHP3450 short circuit protection. However, this may not guarantee that the maximum junction temperature (±150°C) does not exceed all conditions. The rms power dissipation can be calculated using the following equation: is the supply current, Vs+ is the positive supply pin voltage, Vs- is the negative supply pin voltage, Vo(RMS) is the RMS output voltage, and IOUT(RMS) is the delivery to the load. Follow the maximum power derating curves shown in the figure below to ensure proper operation.

Overspeed recovery for amplifiers, when the output goes out of range and/or the input. Recovery times vary based on whether the input or output is too fast and how out of bounds. The FHP3350/3450 typically recovers from overdrive in less than 50 seconds. The picture shows the FHP3350 in overdrive state.

Layout Considerations: Overall floorplan and power supply bypassing have a significant impact on high frequency performance. Fairchild has evaluation boards that are characterized as a guide for high-frequency layout and auxiliary equipment testing. Follow these steps as the basis for a high frequency layout:

Includes 6.8µF and 0.01µF ceramic capacitors

Place the 6.8µF capacitor within 0.75" of the power pins

Place 0.01µF capacitors within 0.1" of the power pins

Remove ground planes under and around parts, especially near input and output pins to reduce parasitic capacitance

Minimize all trace lengths to reduce series inductance See the evaluation board layout below for more information. Evaluation Board Information The following evaluation boards are available to assist with testing and placement of these devices: