HMC728LC3C

Analog switches are devices used for connecting, or switching, one signal to another signal path. The HMC728LC3C is a digital and analog switch from Analog Devices that can be used for switching, connecting, and generating signal paths in various applications. It is an ideal switch for high-performance applications requiring ultra-low wideband distortion and excellent RF performance.

The Applications

The HMC728LC3C has a wide range of applications in the mobile communications and baseband switching markets. These applications include:

• Multiband Cellular Handpicks – The HMC728LC3C is suitable for use with multiple band transceivers and cellular-infrastructure receivers.
• Lower Power Communication – The HMC728LC3C’s ultra-low standby power mode ensures enhanced battery performance in mobile devices.
• Wideband Switches for Signal Routing – The HMC728LC3C can be used for routing signals from, for example, baseband to RF.
• Broadcast Receivers and Transmitters – The HMC728LC3C offers enhanced switching performance with low distortion, high linearity and excellent switched-state return loss.
• Mid- to Long-Range Fixed Wireless Links – The HMC728LC3C supports high order modulations, such as 16QAM, 64QAM and 256QAM for increased range.

Working Principle

Analog switches are commonly used to control the flow of signals from one path to another. Most analog switches have an input port, an output port and a control line. The HMC728LC3C has two input ports, two output ports and two control lines and is therefore a dual-pole, dual-throw (DPDT) switch. The switch can be controlled via the Single Data clock (SDC) pins using a voltage level, typically TTL. When the SDC pin is high, the switch closes and when it is low, the switch opens. In order to switch between the two inputs, the SDC pins must be quickly switched between high and low states.

The HMC728LC3C also has an output enable pin, which is used to enable or disable the output. When the output enable pin is low, the switch is open and the output port is in high impedance state. When the pin is high, the switch is closed, connecting the input and output ports.

The advantage of the HMC728LC3C is that it has ultra-low wideband distortion, low power consumption and excellent RF performance. It also has a low power transition time of 10ns, which makes it suitable for use in high-speed applications. Additionally, the device has an adjustable bias current allowing it to be optimized for different applications.

Conclusion

The HMC728LC3C is a digital and analog switch from Analog Devices that is suitable for various communication and switching applications. It features ultra-low wideband distortion, low power consumption, excellent RF performance and an adjustable bias current. It is an ideal switch for high-performance applications requiring ultra-low wideband distortion and excellent RF performance.