Pin Description

PIN

Common Input. Biased internally at midsupply. Bypass externally to GND with a 0.1µF capacitor. To over-

ride internal biasing, drive with an external supply.

COM

1

FUNCTION

NAME

Filter Input

IN

2

Positive Supply Input: +5V for MAX7400/MAX7403, +3V for MAX7404/MAX7407

4

Ground

GND

3

Offset Adjust Input. To adjust output offset, bias OS externally. Connect OS to COM if no offset adjustment is

needed. Refer to

Offset and Common-Mode Input Adjustment section.

OS

6

Clock Input. To override the internal oscillator, connect to an external clock; otherwise, connect an external

CLK

8

SHDN

7

Filter Output

OUT

5

8th-Order, Lowpass, Elliptic,

Switched-Capacitor Filters

8

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Typical Operating Characteristics (continued)

0.96

0.98

0.97

1.00

0.99

1.03

1.02

1.01

1.04

-40

0

-20

20

40

60

80

100

NORMALIZED OSCILLATOR FREQUENCY

vs. TEMPERATURE

TEMPERATURE (°C)

MAX7400

MAX7403

MAX7404

MAX7407

0.80

0.85

0.90

0.95

1.00

1.05

1.10

1.15

1.20

2.5

3.5

3.0

4.0

4.5

5.0

5.5

NORMALIZED OSCILLATOR FREQUENCY

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

MAX7400

MAX7403

MAX7404

MAX7407

0.1

1

100

10

1000

10,000

0.01

1

0.1

10

100

1000

INTERNAL OSCILLATOR FREQUENCY