MAX293CWE ,8th-Order, Lowpass, Elliptic, Switched-Capacitor FiltersFeatures
. 8th-Order Lowpass Elliptic Filters
t Clock-Tunable Corner-Fre
ency Range:
u
..
MAX293EPA ,8th-Order, Lowpass, Elliptic, Switched-Capacitor FiltersELECTRICAL CHARACTERISTICS
(V+ = 5V, V- = -5V, filter output measured at OUT pin, 20m load resis ..
MAX293ESA+T ,8th-Order, Lowpass, Elliptic, Switched-Capacitor FiltersFeatures
. 8th-Order Lowpass Elliptic Filters
t CIock-Tunable Corner-Fre uency Range:
0.1 Hz ..
MAX293EWE ,8th-Order, Lowpass, Elliptic, Switched-Capacitor Filtersapplications that require filtering
signals in close proximity within the frequency domain.
The ..
MAX293EWE+ ,8th-Order, Lowpass, Elliptic, Switched-Capacitor FiltersGeneral Description
The MAX293/MAX294/MAX297 are easy-to-use, 8th-
order, lowpass, elliptic, sw ..
MAX293EWE+T ,8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters19-0020; Rev 2; 06/08
[VI llXI/I/I
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
..
MAX614CSA ,Dual-Slot PCMCIA Analog Power ControllersELECTRICAL CHARACTERISTICS(VCCIN = +5V, VPPIN = +12V, T = T to T , unless otherwise noted.)A MIN MA ..
MAX614ESA ,Dual-Slot PCMCIA Analog Power ControllersMAX613/MAX614 19-0188; Rev 0; 11/93Dual-Slot PCMCIAAnalog Power Controllers_______________
MAX6160ESA ,SOT23, Low-Cost, Low-Dropout, 3-Terminal Voltage ReferencesApplicationsMAX6150 are available in 3-pin SOT23 and 8-pin SO3V/5V Systemspackages. The MAX6160 is ..
MAX6160EUS-T ,SOT23, Low-Cost, Low-Dropout, 3-Terminal Voltage References
MAX6161AESA ,1.250 V, precision, micropower, low-dropout, high-output-current, SO-8 voltage referenceFeaturesThe MAX6161–MAX6168 are precision, low-dropout,
MAX293CPA-MAX293CWE-MAX293EPA-MAX293EWE-MAX294CPA-MAX294CWE-MAX294EPA-MAX294EWE-MAX297CPA-MAX297CWE-MAX297EPA-MAX297EWE
8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
19-0020; Re V (k 6/92
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
General Description
The MAX293/MAX294/MAX297 are easy-to-use, 8th-
order, lowpass, elliptic, switched-capacitor filters that
can be set up with corner frequencies from 0.1Hz to
25kHz (MAX293/MAX294) or from 0.1Hz to 50kHz
(MAX297).
The MAX293/MAX297's 1.5 transition ratio provides
sharp rolloff and -80dB of stopband rejection. The
MAX294's 1.2 transition ratio provides the steepest rolloff
and -58dB of stopband rejection. All three filters have
fixed responses, so the design task is limited to select-
ing the clock frequency that controls the filter's corner
frequency,
An external capacitor is used to generate a clock using
the internal oscillator, or an external clock signal can be
used, An uncommitted op amp (noninverting input
grounded) is provided for building a Continuous-time
lowpass filter for post-filtering or anti-aliasing. Steep
rolloff and high order make these filters ideal for anti-
aliasing applications that require maximum bandwidth,
and tor communication applications that require filtering
signals in close proximity within the frequency domain.
The MAX293/MAX294/MAX297 are available in 8-pin DIP
and 16-pin wide so packages, delivering aggressive
performance from a tiny area.
Applications
Data-Acquisition Systems
Anti-Aliasing
DAC Post-Filtering
Voice/Data Signal Filtering
Typical Operating Circuit
INPUT ___8 IN OUT 5 OUTPUT
MAXIM 0P OUT ,_3
MAX293
1 MAX294 l
CLOCK - - CLK MAX297 OPIN- _4_ I
GND V-
PIN CONFIGURATION IS 8-PIN DIP,
2fllA] s,ArjbaLAlA]
Features
. 8th-Order Lowpass Elliptlc Filters
. CIock-Tunable fiairArgh"irrg. Range:
0.1 Hz to 25kHz (MAX293/ AX294)
0.1Hz to 50kHz (MAX297)
. No External Resistors or Capacitors Required
. Internal or External Clock
. Clock to Corner Frequency Ratio:
100:1 (MAX293/294)
50:1 (MAX297)
. Operate wlth a Single o5V Supply or Dual tsv
Supplies
. Uncommltted Op Amp tor AntI-Aliaslng or
Clock-Nolse Filtering
t 8-Pin DIP and 16-Pin Wide so Packages
Ordering Information
f'ART, -TEytfpr_e -rhriTsAcru%i7
_e1clr93cirA 0°C to tlyc a Plastic DIP - 1
MAX2930WE_ _0'C£ +10°C_ 16 Wide so _
- M_A_)f_912/f2 - 0''C to +70”C Tc -----
MAX293EPA Ucc% -7rd" 8 Plastic DIP
(M-Ax-am-ve- 147C to ar- "us-wit-ses-c)- l
magma; "_-ss-sic-resell-rss" -n, CERDIP" -, A
MszgTCPA OT) to T7oac" TssnasTe Dwa" -
MEMCWE 0°C to not 16 wide-s-o -
l M2x29Eio, -- Ttfc-Ft-Fi/Esc- - J
Ordering Information continued on last page.
. Contact factory for dice specifications.
.. Contact factory for availability and processing to M)L-STD-883,
Pin Configurations
TOPVIEW
ClK m 8 m
- MAXIM -
i MAX293 7 V‘
OPOUT Ff MAX294 6 GND
OPlN- T, MAX297 5 out
Wide so on last page
IV! A "A I IVI
Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.
AGZXVW/I’VfizXVW/EGZXVW
MAX293/MAX294/MAX297
8th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
ABSOLUTE MAXIMUM RATINGS
Supply Voltage(V+ to V-) ' . '
....... 12V
Input Voltage at Any Pin ....... (V- - 0.3V) s: VIN S (V+ + (13V)
Continuous Power Dissipation
8-Pin Plastic DIP (derate 9.09mWf'C above +70''C) _ . .727mW
16-Pin Wide so (derate 9.52mW/'C above +70°C) . . .762mW
8-Pin CERDIP (derate 8.00mW/“C above +70”C) ..... 640mW
Operating Temperature Ranges:
MAX29_C_ __V__r_..-_-t-_ JC to +70°C
MAX29_E_ _____._._lr--- -40°C to +85°C
MAX29_MJA ......................... -55''C to +125°C
Storage Temperature Range .............. -65”C to +160°C
Lead Temperature (soldering, 10 sec) .............. +300'C
Stresses beyond those listed under "A0solute Maximum Ratings"may cause permanent damage to the dewce. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational secnons 0( the specifications is not implied Exposure to
absolute maximum rating conditions for extended periods may affect device reliability,
ELECTRICAL CHARACTERISTICS
(V+ = w, V- = -5V, filter output measured at OUT pin, 20m load resistor to ground at OUT, fCLK = 100kHz (MAX293/MAX294) or
fCLK = 50kHz (MAX297) TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER I 7 CONDITIONS I MIN TYP MAX 1 UNITS
FILTER CHARACTERISTICS
Corner-Frequency Range MAX293/MAX294 0.1-25k Hz
MAX297 0.1-50k
Clock to Corner MAX293/MAX294 100:1
Frequency Ratio M AX297 50:1
MAX293 8
9923:33122500 mm 7 pprr/C
MAX297 4
m = 0.381Fo 0.12 0.10 0.17
m = 0.594FO 0.12 (102 _ 0.17
m = 0.759Fo J12 0.11 0.17
1m = 0.866Fo 0.12 0.03 0.17
m = 0.9ng0 0,1_2 0.11 0.17
MAX293 m = 0.993F0 0.12 0.04 0.17
m = 1.000Fo 0.12 0.01 0.17
m = 1.500Fo -75 -78
Insertion Gain Relative to W = 1.610Fo -80 -87
DC Gain (Note 1) 1w = 2O20Fo 00 04
le =4.020Fo 00 04 dB
m = 0.425FO 0.10 0.11 0.17
fo = 0.644Fo 0.10 0.02 0.17
fIN = 0.802Fo 0.10 -0.10 0.17
m = 0.895Fo 0.10 .003 0.17
{IN = 0.946Fo 0.10 -0.07 0 17
MAX294 m = 0.994FO 0.26 0.16 0.17
m =1.000FO 0.26 0.13 0.17
f|N = 1.200Fo -51 -54
hr, = 1.270Fo -57 02
1m = 1.530F0 -57 00
1w = 2.840Fo -57 00 -
