MAX3510 Datasheet | Maxim Integrated

19-1398; Rev 2; 8/99 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO Upstream CATV Amplifier Features o Ultra-Low Power-Up/Down Transients, 7mV Typical at 59dBmV Output o Single +5V Supply o Output Level Ranges from <8dBmV to 64dBmV o Gain Programmable in 1dB Steps o Low Transmit Output Noise Floor: -47dBmV (160kHz BW) o Low Transmit-Disable Output Noise: -70dBmV o Two Power-Down Modes General Description The MAX3510 is a programmable power amplifier for use in CATV upstream applications. The device outputs up to 64dBmV (continuous wave) through a 2:1 (voltage ratio) 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 frequency range of 5MHz to 65MHz. The MAX3510 offers a transmit-disable mode, which places the device in a high-isolation state for use between bursts in TDMA systems. In this mode the output stage is shut off, minimizing output noise. When entering and leaving transmit-disable mode, transients are kept to 7mV nominal at full gain. In addition, supply current is reduced to 25mA. Two power-down modes are available. Software-shutdown mode permits power-down of all analog circuitry while maintaining the programmed gain setting. Shutdown mode disables all circuitry and reduces current consumption to less than 10µA. The MAX3510 is available in a 20-pin QSOP package for the extended-industrial temperature range (-40°C to +85°C). MAX3510 Ordering Information PART MAX3510EEP TEMP. RANGE -40°C to +85°C PIN-PACKAGE 20 QSOP Applications Cable Modems CATV Set-Top Box Telephony over Cable CATV Status Monitor Pin Configuration appears at end of data sheet. Typical Operating Circuit 12 CONTROL LOGIC 0.001µF + SHDN 18 TXEN 5 VCC2 CEXT1 VIN+ VOUT+ INPUT ANTI-ALIAS...