MAX291CPA ,8th-Order, Lowpass, Switched-Capacitor FiltersFeatures
. 8th-Order Lowpass Filters:
Butterworth (MAX291/MAX295)
Bessel (MAX292IMAX296)
. ..
MAX291CPA ,8th-Order, Lowpass, Switched-Capacitor FiltersApplications
ADC Anti-Aliasing Filter
Noise Analysis
DAC Post-Filtering
50Hz/60Hz Line- ..
MAX291CPA+ ,8th-Order, Lowpass, Switched-Capacitor FiltersELECTRICAL CHARACTERISTICS
V+ = 5V, V- ' -5V. Wer output measured at OUT pm, 2tyd2 lyad resistor ..
MAX291CSA ,8th-Order, Lowpass, Switched-Capacitor FiltersFeatures
. 8th-Order Lowpass Filters:
Butterworth (MAX291/MAX295)
Bessel (MAX292IMAX296)
. ..
MAX291CSA+T ,8th-Order, Lowpass, Switched-Capacitor FiltersWuan-eDem.
19-4526, Rev J; 12/96
MLABLE “‘1
AV CMGE
gym 50 PA
MAX291CWE ,8th-Order, Lowpass, Switched-Capacitor FiltersGeneral Description
The MAX291/MAX292/MAX295/MAX296 are easy-to-use,
8th-order, Iowpass, switch ..
MAX6126B50 ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceGeneral Description Beneits and
MAX6129AEUK25+ ,Ultra-Low-Power Series Voltage ReferenceELECTRICAL CHARACTERISTICS—MAX6129_21 (V = 2.048V)OUT(V = 2.5V, I = 0, T = T to T , unless otherwis ..
MAX6129AEUK25+T ,Ultra-Low-Power Series Voltage ReferenceFeatures♦ Ultra-Low 5.25µA (max) Supply CurrentThe MAX6129 micropower, low-dropout bandgap volt-age ..
MAX6129AEUK30+T ,Ultra-Low-Power Series Voltage ReferenceApplicationsM AX 6129AC /D30 -40°C to +85°C Dice 3.000Battery-Powered SystemsM AX 6129_E U K33-T -4 ..
MAX6129AEUK33 ,Ultra-Low-Power Series Voltage Referenceapplications. Additionally, an internal com-Ordering Informationpensation capacitor eliminates the ..
MAX6129BEUK30-T ,3.000 V, ultra-low-power, series voltage referenceApplicationsMAX6129_EUK25-T -40°C to +85°C 5 SOT23-5 2.500Battery-Powered SystemsMAX6129_EUK30-T -4 ..
MAX291CPA-MAX291CSA-MAX291CWE-MAX291EPA-MAX291ESA-MAX291EWE-MAX295CPA-MAX295CWE-MAX295EWE-MAX296CPA-MAX296CWE-MAX296EPA
8th-Order, Lowpass, Switched-Capacitor Filters
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y 8th-Order, Lowpass,
Switched-capacitor Filters
General Description Features
The MAX291/MAX292/MAX295/MAX296 are easy-to-use, . 8th-Order Lowpass Filters:
8ttvorder, lowpass, switched-capacitor filters that can be Butterworth (MAX291/MAX295)
set up with corner frequencies from 0.1Hz to 25kHz Bessel (MAX292IMAX296)
(MAX291/MAX292) or 0.1Hz to 50kHz (MAX295/MAX296). . Clock-Tunable Corner-Frequency Range:
The MAX291/MAX295 Butterworth filters provide maxi- 0.1Hz to 25kHz (MAX291IMAx292)
mally flat passband response, and the MAX292/MAX296 0.1Hz to 50kHz (MAX295IMAX296)
Bessel filters provide low overshoot and fast settling. All . No External Reslstors or Capacitors Required
four filters have fixed responses, so the design task IS ' Internal or E xternal Clock
limited to selecting the clock frequency that controls the
filter's corner frequency. . Clock to Corner-Frequency Ratio:
An external capacitor is used to generate a clock using 'rt', (llfd'eljl'fd22'l2]
the internal oscillator, or an external clock signal can be .
used. An uncommitted operational amplifier (noninverting . Low Nttlattt '70d3 THD + Nolse (T yp)
input grounded) is provided for building a continuous- t Operate wlth a Single +5V Supply or
time Iowpass filter for post-filtering or anti-aliasing. Dual :SV Supplies
Produced in an 8-pin DlP/SO and a 16-pin wide SO ' Uncommlted Op Amp for Antl-Aliasing or Clock-
package, and requiring a minimum of external compo- Noise Filtering
nents, the MAX291 series delivers very aggressive per- ' 8-Pln DIP and so Packages
formance from a tiny area.
Applications Ordering Information
ADC Anti-Aliasing Filter PART TEMP. RANGE PIN-PACKAGE
Noise Analysis MAX291 CPA 0°C to +70°C 8 Plastic DIP
DAC Post-Filtering MAX291CSA 0°C to +70°C 8 SO
. . . . MAX291CWE 0°C to +70% 16 Wide so
50Hz/60Hz Line-Noise Filtering MAX291C/D ty' C to +7ty' C Dice"
MAX291EPA -40°C to +85°C a Plastic DIP
MAX291ESA .4ty'C to +85°C a so
MAX291EWE -40°C to +85°C 16 Wide so
MAX291MJA -55°c to +125°c e CERDIP"
Typical Operating Circuit Ordering Information continued on last page.
. Contact factory for dice specWalions.
Mill " Contact factory for availability and processing to MIL-STD-883.
r Pin configurations
INPUT 8 IN ' OUT 5 OUTPUT TOP VIEW
MAXIM 0 our 3 . V
1 8 IN
MAWL M E MAXIM El
CLOCK l thlt 4 Vi E iuxa, El V,
e v- 0P OUT E E] GND
__L 2 OPIN- E El OUT
-W DlP/SO
Pin Configuration is B-pin D/P/SO. 16-pin Mde so on last page.
MAXIM l Maxim Integrated Product; 1
& the latest literature: http://www.maxlm-ic.com,
QGZWW/SEZXVW/ZEZWW/fl- GZWW
Sith-Order, Lowpass,
SwNethedMtapaelltor Filters
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V+ to V-) ....................................................... 12V
Input Voltage at Any Pin ............. V- + (-0.3V) s VIN s V+ + (0.3V)
Continuous Power Dissipation
8-Pin Plastic DIP (derate 9.09mWf'C above +70°C) ...727mw
8-Pin SO (derate 5.88mWeC above +70°C) ................ 471mW
16-Pin Wide SO (derate 9.52mWf'C above +70°C) ....762mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C) ........ 640mW
Operating Temperature Ranges
MAX29_C__ _.........-......-..--.----..-. tPC to +70°C
..-40°C to +65°O
-55°C to +125°C
65°C to +160°C
Lead Temperature (soldering, msec) ............................ +300°C
Stresses be and those listed under 'Absoluie Maximum Ratings' may cause permanent damage to the device, These are stress ratings only. and functional
operation a the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not inplied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability,
ELECTRICAL CHARACTERISTICS
V+ = 5V, V- = -5V, filter outputmeasured at OUT pin, 20m load resistor to ground at OUT and OP OUT, fCLK = 100kHz
MAX291/MAX292) or fax = 50kHz (MAX295/MAX296). TA = TMIN to TMAX, unless otherwise noted.)
MAX291/MAX292/EWAX295/MAX296
PARAMETER I CONDITIONS MIN TYP MAX UNITS
FILTER CHARACTERISTICS
C MAX291/MAX292 0.1-25k
orner-Frequency Range Hz
MAX295/MAX296 0.1-50k
Clock to Corner MAX291/MAX292 100:1
Frequency Ratio MAX295/MAX296 50:1
MAX291 10
Clock to Corner MAX292 40 C
Frequency Tempco M AX295 5 ppml‘
MAX296 60
tIN = 0.50 Fo -0.02 All
MAX291 m = 1.00 Fo -2.2 -2.7 -3.2
m = 2.00 Fo Mao -48.0
m = 3.00 Fo -70.0 -76.0
m = 0.25 Fo 0.1 -0.2 -0.3
hr: = 0.50 Fe AJ.6 -0.8 -1.0
MAX292 M = 1.00 Fo 27 -3.0 -3.3
fm = 2.00 Fe -11.0 -13.0 45.0
Insertiqn Gain Relative to fIN = 3-00 Fo -30.0 -34.0 dB
an fIN = 4.00 Fo -47.0 -51.0
m = 6.00 Fo -74.0 -78.0
M = 0.50 Fo -o.02 0.1
MAX295 m = 1.00 Fo -2.2 -2.7 -3.2
m = 2.00 Fo M3.0 M8.0
le = 3.00 Fo -70.0 -76.0
tIN = 0.25 Fo Ahl -0.2 AL
fIN = 0.50 Fo 06 A18 -1.0
MAX296 tIN = 1.00 Fo -2.7 -3.0 -3.3
hr; = 2.00 Fo -11.0 -13.0 45.0
hr; = 3.00 Fo -30.0 -34.0
le = 4.00 Fe -47.0 -51.0
m = 6.00 Fo -74.0 -78.0
