MAX9480 Datasheet PDF | Maxim Integrated

Maxim Integrated MAX9480

The MAX9480 includes a hybrid network and two lownoise, fixed-gain-of-4.6V/V receive amplifiers. The part is designed to recover the receive signal to the same level as that of a conventional line interface circuit that incorporates a 1:2 transformer and standard back-matched hybrid, without degrading signal-to-noise ratio (SNR) or line-impedance sensitivity. The MAX9481 provides only the preamplifiers and buffers without the hybrid or receivers.

Part No.	MAX9480
Datasheet	MAX9480 Download
Manufacturer	Maxim Integrated
Description	Low-Power / Low-Distortion / Central-Office ADSL Drivers and Integrated Drivers/Receivers
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GENERAL DESCRIPTION

The MAX9480/MAX9481/MAX9482 low-power, low-distortion, class-G, high-current asymmetric digital subscriber line (ADSL) drivers offer Rail-to-Rail® output and are ideal for ADSL in central-office applications. Operating from ±5V and ±2.5V supplies, the drivers incorporate two high-speed current-feedback preamplifiers driving two fixed-gain class-G buffers. The buffers can deliver 20.4dBm average line power with a signal crest factor of 5.3, and are designed to be directly DC or AC bridged across a 1:2.5 transformer. The MAX9480/MAX9481/MAX9482 employ an active line termination scheme for incoming signals that eliminates the need for back-match resistors, reducing line-card power consumption at full rate to less than half of that required by conventional class-AB line-driver circuits. The MAX9482 provides preamplifiers, buffers, and uncommitted receive amplifiers. All devices have a low-output-impedance shutdown function for saving power when not transmitting. At full-rate 20.4dBm discrete multitone data transmission (DMT), the total dynamic power dissipation is only 680mW (MAX9480/MAX9482) or 655mW (MAX9481).