LT5538IDD#PBF

LT5538 is a 40MHz to 3800MHz monolithic logarithmic RF power detector, capable of measuring RF signals over a wide dynamic range, from -75dBm to 10dBm. The RF signal in an equivalent decibel-scaled value is precisely converted into DC voltage on a linear scale. The wide linear dynamic range is achieved by measuring the RF signal using cascaded RF limiters and RF detectors. Their outputs are summed to generate an accurate linear DC voltage proportional to the input RF signal in dBm. It delivers superior temperature stable output (within ±1dB over full temperature range) from 40MHz to 3.8GHz. The output is buffered with a low impedance driver. It is widely used in applications such as received signal strength indication (RSSI), RF power measurement and control, RF/IF power detection, receiver RF/IF gain control, envelope detection, ASK receiver etc.

• Exceptional accuracy over temperature
• Single-ended RF input
• Linear dynamic range is 75dB typical at (±1dB linearity error, TA = 25°C)
• Sensitivity is 72dB typical at (TA = 25°C, VCC = 5V)
• Supply voltage range from 3V to 5.25V
• Supply current is 29mA typ at (TA = 25°C, VCC = 5V)
• Shutdown current is 1μA typ at (TA = 25°C, VCC = 5V)
• Input resistance is 394ohm typical at (TA = 25°C, VCC = 5V)
• Operating temperature range from -40°C to 85°C
• Package style is 8-lead plastic DFN

Note

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party