Rainbow-electronics MAX7425 Bedienungsanleitung PDF herunterladen

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

General Description

The MAX7418–MAX7425 5th-order, low-pass, switched-

capacitor filters (SCFs) operate from a single +5V

(MAX7418–MAX7421) or +3V (MAX7422–MAX7425)

supply. These devices draw only 3mA of supply current

and allow corner frequencies from 1Hz to 45kHz, mak-

ing them ideal for low-power post-DAC filtering and anti-

aliasing applications. They feature a shutdown mode

that reduces supply current to 0.2µA.

Two clocking options are available: self-clocking

(through the use of an external capacitor), or external

clocking for tighter corner-frequency control. An offset

adjust pin allows for adjustment of the DC output level.

The MAX7418/MAX7422 deliver 53dB of stopband

rejection and a sharp rolloff with a 1.6 transition ratio.

The MAX7421/MAX7425 achieve a sharper rolloff with a

1.25 transition ratio while still providing 37dB of stop-

band rejection. The MAX7419/MAX7423 Bessel filters

provide low overshoot and fast settling, and the

MAX7420/MAX7424 Butterworth filters provide a maxi-

mally flat passband response. Their fixed response sim-

plifies the design task of selecting a clock frequency.

Applications

ADC Anti-Aliasing CT2 Base Stations

DAC Postfiltering Speech Processing

Features

♦ 5th-Order, Lowpass Filters

Elliptic Response (MAX7418/MAX7421/

MAX7422/MAX7425)

Bessel Response (MAX7419/MAX7423)

Butterworth Response (MAX7420/MAX7424)

♦ Clock-Turnable Corner Frequency (1Hz to 45kHz)

♦ Single-Supply Operation

+5V (MAX7418–MAX7421)

+3V (MAX7422–MAX7425)

♦ Low Power

3mA (Operating Mode)

0.2µA (Shutdown Mode)

♦ Available in 8-Pin µMAX Package

♦ Low Output Offset: ±4mV

MAX7418–MAX7425

5th-Order, Lowpass,

Switched-Capacitor Filters

________________________________________________________________ Maxim Integrated Products 1

OUTV

CLK

SHDNIN

GND

COM

µMAX

TOP VIEW

MAX7418–

MAX7425

CLK

OUT

GND

INPUT

0.1µF

CLOCK

SHDN

OUTPUT

SUPPLY

COM

MAX7418–

MAX7425

Typical Operating Circuit

19-1821; Rev 0; 11/00

Pin Configuration

Ordering Information

Selector Guide

PART

MAX7418EUA -40°C to +85°C

TEMP. RANGE PIN-PACKAGE

8 µMAX

Selector Guide continued at end of data sheet.

Ordering Information continued at end of data sheet.

MAX7418CUA

0°C to +70°C 8 µMAX

MAX7419CUA

0°C to +70°C 8 µMAX

MAX7419EUA -40°C to +85°C 8 µMAX

MAX7420CUA

0°C to +70°C 8 µMAX

MAX7420EUA -40°C to +85°C 8 µMAX

MAX7421CUA

0°C to +70°C 8 µMAX

MAX7421EUA -40°C to +85°C 8 µMAX

PART FILTER RESPONSE

OPERATING

VOLTAGE (V)

MAX7418 r = 1.6 +5

MAX7419 Bessel +5

MAX7420 Butterworth +5

MAX7421 r = 1.25 +5

1 2 3 4 5 6 ... 13 14

Inhaltsverzeichnis

Seite 1 - Switched-Capacitor Filters

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,or visit Maxim’s website at www.maxim-ic.com.General Des

Seite 2

MAX7418–MAX74255th-Order, Lowpass,Switched-Capacitor Filters10 ______________________________________________________________________________________A

Seite 3

MAX7418–MAX74255th-Order, Lowpass, Switched-Capacitor Filters______________________________________________________________________________________ 11

Seite 4

MAX7418–MAX74255th-Order, Lowpass,Switched-Capacitor Filters12 ______________________________________________________________________________________a

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MAX7418–MAX74255th-Order, Lowpass, Switched-Capacitor Filters______________________________________________________________________________________ 13

Seite 6

MAX7418–MAX74255th-Order, Lowpass,Switched-Capacitor FiltersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely

Seite 7

MAX7418–MAX74255th-Order, Lowpass,Switched-Capacitor Filters2 _______________________________________________________________________________________A

Seite 8

MAX7418–MAX74255th-Order, Lowpass, Switched-Capacitor Filters_______________________________________________________________________________________ 3

Seite 9

MAX7418–MAX74255th-Order, Lowpass,Switched-Capacitor Filters4 _______________________________________________________________________________________F

Seite 10

MAX7418–MAX74255th-Order, Lowpass, Switched-Capacitor Filters_______________________________________________________________________________________ 5

Seite 11

____________________________Typical Operating Characteristics (continued)(VDD= +5V for MAX7418–MAX7421, VDD= +3V for MAX7422–MAX7425, fCLK= 2.2MHz, SH

Seite 12

____________________________Typical Operating Characteristics (continued)(VDD= +5V for MAX7418–MAX7421, VDD= +3V for MAX7422–MAX7425, fCLK= 2.2MHz, SH

Seite 13

____________________________Typical Operating Characteristics (continued)(VDD= +5V for MAX7418–MAX7421, VDD= +3V for MAX7422–MAX7425, fCLK= 2.2MHz, SH

Seite 14

MAX7418–MAX74255th-Order, Lowpass, Switched-Capacitor Filters_______________________________________________________________________________________ 9

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Rainbow-electronics MAX7425 Bedienungsanleitung

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