MAX7421 datasheet(2/14 Pages) MAXIM

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5th-Order, Lowpass,

Switched-Capacitor Filters

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX7418–MAX7421

(VDD = +5V, filter output measured at OUT, 10k

Ω || 50pF load to GND at OUT, OS = COM, 0.1µF capacitor from COM to GND,

SHDN = VDD, fCLK = 2.2MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VDD to GND ..............................................................-0.3V to +6V

IN, OUT, COM, OS, CLK, SHDN ................-0.3V to (VDD + 0.3V)

OUT Short-Circuit Duration.......................................................1s

Continuous Power Dissipation (TA = +70°C)

8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW

Operating Temperature Ranges

MAX74 _ _C_A ...................................................0°C to +70°C

MAX74 _ _E_A ................................................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10s) .................................+300°C

CLOCK

FILTER CHARACTERISTICS

110

135

±50

±75

MAX7419/MAX7420

MAX7418/MAX7421

MAX7419/MAX7420

MAX7418/MAX7421

-0.2

+0.2

MAX7419/MAX7420

MAX7418/MAX7421

0.001 to 30

VIN = 4Vp-p (Note 1)

Input Voltage Range at OS

2.0

2.5

3.0

COM Voltage Range

Maximum Capacitive Output

Load Drive

UNITS

kHz

ppm/°C

V/V

Ω

mVp-p

Ω

µA

kHz

µA

Clock Output Current

(Internal Oscillator Mode)

ICLK

±40

±60

Clock Input High

VIH

4.5

Clock Input Low

VIL

0.5

VCLK = 0 or 5V

PARAMETER

SYMBOL

MIN

TYP

MAX

DC Insertion Gain with

Output Offset Removed

0.2

0.4

Output Offset Voltage

VOFFSET

±4

±25

Output Voltage Range

0.25

VDD - 0.25

Clock-to-Corner Tempco

Offset Voltage Gain

AOS

VCOM

Corner Frequency

Clock-to-Corner Ratio

fCLK /fC

100:1

2.3

2.5

2.7

VOS

VCOM ±0.1

Input Resistance at COM

RCOM

100

140

Clock Feedthrough

Resistive Output Load Drive

500

Input Leakage Current at COM

±0.1

±10

Input Leakage Current at OS

±0.1

±10

Internal Oscillator Frequency

fOSC

106

CONDITIONS

Output, COM unconnected

VCOM = VDD / 2

(Note 2)

VIN = VCOM = VDD / 2

Input, OS externally driven

OS to OUT

Input, COM externally driven

SHDN = GND, VCOM = 0 to VDD

VOS = 0 to VDD

COSC = 1000pF

(Note 3)

-78

MAX7419

MAX7418

-76

-78

MAX7421

MAX7420

Total Harmonic Distortion

plus Noise

THD+N

-67

fIN = 2kHz,

VIN = 4Vp-p,

measurement

bandwidth = 80kHz

FILTER CHARACTERISTICS

CLOCK

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