ZL40167

Data Sheet

2

Zarlink Semiconductor Inc.

Description

The ZL40167 is a low cost voltage feedback opamp capable of driving signals to within 1V of the power supply rails.

It features low noise and low distortion accompanied by a high output current which makes it ideally suited for the

application as an xDSL line driver. The dual opamp can be connected as a differential line driver delivering signals

up to 18.8Vpp swing into a 25

Ω load, fully supporting the peak upstream power levels for upstream full-rate ADSL

(Asymmetrical Digital Subscriber Line).

The wide bandwidth, high power output and low differential gain and phase figures make the ZL40167 ideally suited

for a wide variety of video driver applications.

Application Notes

The ZL40167 is a high speed, high output current, dual operational amplifier with a high slew rate and low

distortion. The device uses conventional voltage feedback for ease of use and more flexibility. These characteristics

make the ZL40167 ideal for applications where driving low impedances of 25 to 100

Ω such as xDSL and active

filters.

The figure below shows a typical ADSL application utilising a 1:2 transformer, the feedback path provides a

Gain = +2.

Figure 2 - A Typical ADSL Application

A class AB output stage allows the ZL40167 to deliver high currents to low impedance loads with low distortion

while consuming low quiescent current.

Note: the high ESD immunity figure of 4kV may mean that in some designs fewer additional EMC protection

components are needed thus reducing total system costs.

The ZL40167 is not limited to ADSL applications and can be used as a general purpose opamp configured with

either inverting or non-inverting feedback. The figure below shows non-inverting feedback arrangement that has

typically been used to obtain the data sheet specifications.

100R

Rg

Rf1

Rf2

12R5

12R5