Rainbow-electronics MAX7407 Bedienungsanleitung PDF herunterladen

General Description

The MAX7400/MAX7403/MAX7404/MAX7407 8th-order,

lowpass, elliptic, switched-capacitor filters (SCFs) oper-

ate from a single +5V (MAX7400/MAX7403) or +3V

(MAX7404/MAX7407) supply. These devices draw 2mA

of supply current and allow corner frequencies from

1Hz to 10kHz, making them ideal for low-power anti-

aliasing and post-DAC filtering applications. They fea-

ture a shutdown mode that reduces the supply current

to 0.2µA.

Two clocking options are available: self-clocking

(through the use of an external capacitor) or external

clocking for tighter cutoff-frequency control. In addition,

an offset adjustment pin (OS) allows for the adjustment

of the DC output level.

The MAX7400/MAX7404 provide 82dB of stopband

rejection and a sharp rolloff with a transition ratio of 1.5.

The MAX7403/MAX7407 provide a sharper rolloff with a

transition ratio of 1.2, while still delivering 60dB of stop-

band rejection. The fixed response of these devices

simplifies the design task to corner-frequency selection

by setting a clock frequency. The MAX7400/

MAX7403/MAX7404/MAX7407 are available in 8-pin SO

and DIP packages.

Applications

ADC Anti-Aliasing Speech Processing

Post-DAC Filtering Air-Bag Electronics

CT2 Base Stations

Features

♦ 8th-Order Lowpass Elliptic Filter

♦ Low Noise and Distortion

-82dB THD + Noise (MAX7400)

♦ Clock-Tunable Corner Frequency (1Hz to 10kHz)

♦ 100:1 Clock-to-Corner Ratio

♦ Single-Supply Operation

+5V (MAX7400/MAX7403)

+3V (MAX7404/MAX7407)

♦ Low Power

2mA (Operating Mode)

0.2µA (Shutdown Mode)

♦ Available in 8-Pin SO and DIP Packages

♦ Low Output Offset: ±5mV

MAX7400/MAX7403/MAX7404/MAX7407

8th-Order, Lowpass, Elliptic,

Switched-Capacitor Filters

________________________________________________________________

Maxim Integrated Products

CLK

OUT

GND

INPUT

0.1µF

CLOCK

SHDN

OUTPUT

SUPPLY

COM

MAX7400

MAX7403

MAX7404

MAX7407

OUTV

CLK

SHDNIN

GND

COM

SO/DIP

TOP VIEW

MAX7400

MAX7403

MAX7404

MAX7407

Typical Operating Circuit

19-4764; Rev 2; 6/99

Ordering Information continued at end of data sheet.

Pin Configuration

Ordering Information

Selector Guide

MAX7407 Elliptic (r = 1.2) +3

PART FILTER RESPONSE

OPERATING

VOLTAGE (V)

MAX7403

MAX7400 Elliptic (r = 1.5) +5

Elliptic (r = 1.2) +5

MAX7404 Elliptic (r = 1.5) +3

PART

MAX7400CSA

MAX7400CPA

MAX7400ESA -40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

8 SO

8 Plastic DIP

8 SO

MAX7400EPA -40°C to +85°C 8 Plastic DIP

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

1 2 3 4 5 6 ... 11 12

Switched-Capacitor Filters 1

Inhaltsverzeichnis

Seite 1 - Switched-Capacitor Filters

General DescriptionThe MAX7400/MAX7403/MAX7404/MAX7407 8th-order,lowpass, elliptic, switched-capacitor filters (SCFs) oper-ate from a single +5V (MAX7

Seite 2

VDDVSUPPLYINCLKGNDINPUTOUTPUT50k50k50kOUT0.1µF0.1µF0.1µFCLOCKSHDNCOMOSMAX7400MAX7403MAX7404MAX7407Figure 4. Offset Adjustment CircuitMAX7400/MAX7403/

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MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters_______________________________________________________________

Seite 4

MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor FiltersPackage InformationSOICN.EPSTRANSISTOR COUNT: 1116Ordering Info

Seite 5

MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters2 _____________________________________________________________

Seite 6

MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters_______________________________________________________________

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MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters4 _____________________________________________________________

Seite 8

8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters_______________________________________________________________________________________ 5Note

Seite 9

MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters6 _____________________________________________________________

Seite 10

MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters_______________________________________________________________

Seite 11

Pin DescriptionPINCommon Input. Biased internally at midsupply. Bypass externally to GND with a 0.1µF capacitor. To over-ride internal biasing, drive

Seite 12

MAX7400/MAX7403/MAX7404/MAX74078th-Order, Lowpass, Elliptic, Switched-Capacitor Filters_______________________________________________________________

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