Maxim provides a recommended PCB layout in the datasheet, but it's also important to follow general high-frequency PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using 50Ω transmission lines. Additionally, it's recommended to place the device near the connector to minimize signal degradation.
The DS2704G+T&R has a thermal pad on the bottom of the package, which should be connected to a solid ground plane on the PCB to dissipate heat. Additionally, it's recommended to use thermal vias to connect the thermal pad to the ground plane, and to use a heat sink or thermal interface material if necessary. The maximum junction temperature is 150°C, so it's essential to ensure the device stays within this limit.
The recommended input signal amplitude is 100mV to 1V peak-to-peak, and the frequency range is 100kHz to 1.5GHz. However, the device can operate with input signals up to 2GHz, but with reduced performance. It's essential to ensure the input signal is within the recommended range for optimal performance and to avoid damage to the device.
The DS2704G+T&R has a gain control pin (GAIN) that allows the user to set the gain to one of four settings: 12dB, 18dB, 24dB, or 30dB. The gain setting is determined by the voltage applied to the GAIN pin, which can be connected to a voltage source or a digital signal. The datasheet provides a table that shows the corresponding gain setting for each voltage level.
The DS2704G+T&R has a power-down mode that reduces the power consumption to less than 1mA. To enable power-down mode, the EN pin should be pulled low. In power-down mode, the device's output is high-impedance, and the input is disconnected from the output. The device will return to normal operation when the EN pin is pulled high again.
DS2704G+T&R datasheet
by Maxim Integrated Products
