LM7131ACMX datasheet(20/23 Pages) NSC

部件名	LM7131ACMX

功能描述	Tiny High Speed Single Supply Operational Amplifier

PDF	23 Pages

Scroll/Zoom	100%

制造商	NSC [National Semiconductor (TI)]

网页	http://www.national.com

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20 / 23 page

Using the LM7131 (Continued)

D/A Output Amplifier

The LM7131 can be used as an output amplifier for fast

digital-to-analog converters. When using the LM7131 with

converters with an output voltage range which may exceed

the differential input voltage limit of ±2V, it may be necessary

to add protection diodes to the inputs. See

Figure 15. For

high speed applications, it may be useful to consider low ca-

pacitance schottky diodes. Additional feedback capacitance

may be needed to control ringing due to the additional input

capacitance from the D/A and protection diodes. When used

with current output D/As, the input bias currents may pro-

duce a DC offset in the output. This offset may be canceled

by a resistor between the positive input and ground.

Spice Macromodel

A SPICE macromodel of the LM7131 and many other Na-

tional Semiconductor op amps is available at no charge from

your National Semiconductor representative.

DS012313-24

FIGURE 15. D/A Ouput Amplifier

LM7131ACMX 数据表(PDF) 20 Page - National Semiconductor (TI)