General Description
The MAX3509 is a programmable power amplifier for use in CATV upstream applications. The device outputs up to 66dBmV QPSK through a 1:1 transformer. It features variable gain controlled by a 3-wire digital serial bus. Gain control is available in 1dB steps. The device operates over a 5MHz to 65MHz frequency range.

FEATUREs
♦ Ultra-Low Power-Up/Down Transients,
   25mV (typ) at 66dBmV Output
♦ Single-Supply Operation
♦ Output Level Ranges from <12dBmV to 67dBmV
   (QPSK)
♦ Gain Programmable in 1dB Steps
♦ Low Transmit Output Noise Floor: -41dBmV
   (160kHz BW)
♦ Low Transmit-Disable Output Noise: -70dBmV
♦ Shutdown Mode

APPLICATIONs
   Telephony-Over-Cable
   CATV Status Monitors
   OPENCATV Set-Top Boxes
   CATV Infrastructures
   Cable Modems