2

Maxim Integrated

Digitally-Programmed, Dual

2nd-Order Continuous Lowpass Filter

MAX270/MAX271

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.

V+ to V- .................................................................-0.3V to +17V

V+ to GND............................................................-0.3V to +8.5V

V- to GND.............................................................. -0.3V to -8.5V

Input Voltage to GND, Any Input Pin ....(V- - 0.3V) to (V+ + 0.3V)

Duration of Output Short Circuit to GND...................Continuous

Continuous Power Dissipation (TA = +70NC)

MAX270

PDIP (derate 11.1mW/NC above +70NC) .....................889mW

SO (W) (derate 10mW/NC above +70NC......................800mW

MAX271

PDIP (derate 13.3mW/NC above +70NC) ...................1067mW

SO (W) (derate 11.7mW/NC above +70NC).................. 941mw

Operating Temperature Ranges:

MAX27_C_ _....................................................... 0NC to +70NC

MAX27_E_ _.................................................... -40NC to +85NC

Storage Temperature Range............................ -65NC to +165NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow)

Lead(Pb)-free...............................................................+260NC

Containing lead(Pb).....................................................+240NC

ELECTRICAL CHARACTERISTICS

(V+ = +5V, V- = -5V; TA = +25NC, unless otherwise noted.)

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

FILTER CHARACTERISTICS

Operating Frequency Range

(Note 1)

2

MHz

Programmed Cutoff Frequency (fC)

Range

1 to 25

kHz

Programmed Cutoff Frequency

Error

fC code = 53 (2.536kHz typ)

Q

2.9

%

fC code = 127 (25kHz typ)

Q

9.5

Filter Gain

fC code = 0 (1kHz typ),

TA = TMIN to TMAX

fIN = 1kHz

-3.6

-2.4

dB

fIN = 8kHz

-33

fC code = 127 (25kHz typ),

TA = TMIN to TMAX

fIN = 25kHz

-6

-0.5

fIN = 200kHz

-34

Maximum Gain (Peaking)

fC code = 0 (1kHz typ)

0.15

dB

fC code = 127 (25kHz typ)

0.15

Wideband Noise

50Hz to 50kHz bandwidth

fC code = 0

(1kHz typ)

12

F

VRMS

fC code = 127

(25kHz typ)

38

DC CHARACTERISTICS

DC Output Signal Swing

OUTA, OUTB, OP OUT (MAX270)

OUTA, OUTB, T/H OUT (MAX271)

RLOAD = 5kI, TA = TMIN to TMAX

-3

+3

V

Offset Voltage at Outputs

OUTA, OUTB, OP OUT (MAX270)

OUTA, OUTB, T/H OUT (MAX271)

-2

+2

mV

DC Input Leakage Current

INA, INB (MAX270)

INA, INB (MAX271)

TA = TMIN to TMAX

-1

+1

F

A