User Manual Q&AAnswer
Jan 25, 2025 - 05:04 AM
To determine the power requirements for the ANALOG DEVICES LT3471, you need to consider the supply voltage, supply current, and power supply rejection ratio (PSRR) of the various components used in the signal chain.
1. Supply Voltage: The LT3471 requires a supply voltage of +15V and -15V for the PMU DAC & ADC stages, +5V for the amplifier stage, and +15V and -15V for the V+ and V- pins.
2. Supply Current: The maximum quiescent current of the supply rails is 36mA for the PMU DAC & ADC stages, -36mA for the PMU DAC & ADC stages, 1.5mA for the amplifier stage, 0.6mA for the V+ pin, and -0.6mA for the V- pin. These values represent the maximum current consumption of each stage.
3. Power Supply Rejection Ratio (PSRR): The PSRR indicates the ability of the device to reject variations in the power supply voltage. For the LT3471, the PSRR is 45dB at 100kHz for the PMU DAC & ADC stages, 50dB at 100kHz for the amplifier stage, 80dB at 100kHz for the V+ pin, and 50dB at 100kHz for the V- pin.
It is important to note that these values are typical for the LT3471 and may vary depending on the specific application. For more detailed information on power dissipation and specific power requirements, it is recommended to consult the corresponding datasheets of the signal chain components.
Please refer to the manual for further information and details on power requirements and specifications.
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