Datasheet > LMF60

LMF60

更新时间： 2022-11-26 17:05:19

品牌	Logo	应用领域
美国国家半导体 - NSC		开关
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描述
LMF60 High Performance 6th-Order Switched Capacitor Butterworth Lowpass Filter

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LMF60 数据手册

May 1996

LMF60 High Performance

6th-Order Switched Capacitor

Butterworth Lowpass Filter

General Description

The LMF60 is a high performance, precision, 6th-order But-

terworth lowpass active filter. It is fabricated using Nation-

Features

Cutoff frequency range of 0.1 Hz to 30 kHz

Cutoff frequency accuracy of 1.0%, maximum

Low offset voltage 100 mV, maximum, 5V supply

al’s LMCMOS process, an improved silicon-gate CMOS pro-

cess specifically designed for analog products. Switched-

capacitor techniques eliminate external component require-

ments and allow a clock-tunable cutoff frequency. The ratio

of the clock frequency to the low-pass cutoff frequency is

internally set to 50:1 (LMF60-50) or 100:1 (LMF60-100). A

Schmitt trigger clock input stage allows two clocking op-

tions, either self-clocking (via an external resistor and ca-

pacitor) for stand-alone applications, or for tighter cutoff fre-

quency control, a TTL or CMOS logic compatible clock can

be directly applied. The maximally flat passband frequency

response together with a DC gain of 1V/V allows cascading

LMF60 sections for higher-order filtering. In addition to the

filter, two independent CMOS op amps are included on the

die and are useful for any general signal conditioning appli-

cations. The LMF60 is pin- and functionally-compatible with

the MF6, but provides improved performance.

Low clock feedthrough of 10 mV

Dynamic range of 88 dB, typical

, typical

p–p

Two uncommitted op amps available

No external components required

14-pin DIP or 14-pin wide-body S.O. package

Single/Dual Supply Operation:

4V to 14V ( 2V to 7V)

Cutoff frequency set by external or internal clock

Pin-compatible with the MF6

Applications

Communication systems

Audio filtering

Anti-alias filtering

Data acquisition noise filtering

Instrumentation

High-order tracking filters

Block and Connection Diagrams

All Packages

TL/H/9294–2

Top View

Order Number LMF60CMJ-50,

(5962-9096 701MCA or

LMF60CMJ50/883),

LMF60CMJ-100, or

(5962-9096 702MCA

or LMF60CMJ100/883)

See NS Package Number J14A

Order Number LMF60CIWM-50

or LMF60CIWM-100

See NS Package Number M14B

TL/H/9294–1

Order Number LMF60CIN-50

or LMF60CIN-100

See NS Package Number N14A

TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.

1996 National Semiconductor Corporation

TL/H/9294

RRD-B30M56/Printed in U. S. A.

12 3 4 5 6 7...20

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