ОБЩЕЕ ОПИСАНИЕ

The ADG752 is a low voltage SPDT (single pole, double throw) switch. It is constructed using switches in a T-switch configuration, which results in excellent Off Isolation while maintaining good frequency response in the ON condition. High off isolation and wide signal bandwidth make this part suitable for switching RF and video signals. Low power consumption and operating supply range of +1.8 V to +5.5 V make it ideal for battery powered, portable instruments. The ADG752 is designed on a submicron process that provides low power dissipation yet gives high switching speed and low on resistance. This part is a fully bidirectional switch and can handle signals up to and including the supply rails. Break-before-make switching action ensures the input signals are protected against momentary shorting when switching between channels. The ADG752 is available in 6-lead SOT-23 and 8-lead mSOIC packages.

 

ОСНОВНЫЕ ХАРАКТЕРИСТИКИ ПРОДУКЦИИ

1.High Off Isolation –80 dB at 30 MHz.

2.–3 dB Signal Bandwidth 250 MHz.

3.Low On Resistance (15 W).

4.Low Power Consumption, typically <0.01 mW.

5.Break-Before-Make Switching Action.

6.Tiny 6-lead SOT-23 and 8-lead mSOIC packages.

 

ОСОБЕННОСТИ

High Off Isolation –80 dB at 30 MHz–3 dB Signal Bandwidth 250 MHz

+1.8 V to +5.5 V Single Supply

Low On-Resistance (15 V Typically)

Low On-Resistance Flatness

Fast Switching Times

tON Typically 8 ns

tOFF Typically 3 ns

Typical Power Consumption < 0.01 mW

TTL/CMOS Compatible

 

ПРИЛОЖЕНИЯ

Audio and Video Switching

RF Switching

Networking Applications

Battery Powered Systems

Communication Systems

Relay Replacement

Sample-and-Hold Systems

 

LAYOUT CONSIDERATIONS

Where accurate high frequency operation is important, careful consideration should be given to the printed circuit board layout and to grounding. Wire wrap boards, prototype boards and sockets are not recommended because of their high parasitic inductance and capacitance. The part should be soldered directly to a printed circuit board. A ground plane should cover all unused areas of the component side of the board to provide a low impedance path to ground. Removing the ground planes from the area around the part reduces stray capacitance. Good decoupling is important in achieving optimum performance. VDD should be decoupled with a 0.1 mF surface mount capacitor to ground mounted as close as possible to the device itself.

 

ОБЩЕЕ ОПИСАНИЕ

The ADG752 is an SPDT switch constructed using switches in a T configuration to obtain high “OFF” isolation while maintaining good frequency response in the “ON” condition. While the switch is in the OFF state, the shunt switch is closed and the two series switches are open. The closed shunt switch provides a signal path to ground for any of the unwanted signals that find their way through the off capacitances of the series’ MOS devices. This results in more improved isolation between the input and output than with an ordinary series switch. When the switch is in the ON condition, the shunt switch is open and the signal path is through the two series switches which are now closed.

 

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADG752 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

 

REV. A

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