A good PCB layout for the MAX44265EWT+T involves keeping the input and output traces separate, using a solid ground plane, and placing the device close to the power supply. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane to minimize noise and ensure optimal performance.
The MAX44265EWT+T requires a single 2.7V to 5.5V power supply. It's recommended to power the device with a clean and stable voltage source, and to ensure that the power supply is stable before applying any input signals. The power sequencing requirements are not critical, but it's recommended to power the device after the input signals are stable.
The MAX44265EWT+T can handle input signal amplitudes up to 5Vpp and frequencies up to 100kHz. However, the device is optimized for audio applications and is typically used with input signals in the range of 1Vpp to 3Vpp and frequencies up to 20kHz.
The gain of the MAX44265EWT+T can be adjusted by using an external resistor (Rg) connected between the gain pin (GAIN) and ground. The maximum gain available is 40dB, which is achieved with Rg = 0Ω. The gain can be calculated using the formula: Gain (dB) = 40 - (20 * log10(Rg/1kΩ)).
The output impedance of the MAX44265EWT+T is typically around 100Ω. This means that the device can drive loads with impedance as low as 1kΩ, but the output voltage will be affected by the load impedance. It's recommended to use a buffer stage or an amplifier with a lower output impedance if the load impedance is lower than 1kΩ.
MAX44265EWT+T datasheet
by Maxim Integrated Products
