MAX280CWE ,5th Order, Zero DC Error, Lowpass FilterELECTRICAL CHARACTERISTICS
(V* = +5V, V' = -6V, TA = 25°C. unless otherwise specified, AC output m ..
MAX280CWE+ ,5th-Order, Zero-Error, Butterworth, Switched-Capacitor Lowpass FilterGeneral Description
The MAX280/MXL1062 are 5th
MAX280EPA ,5th Order, Zero DC Error, Lowpass FilterApplications
Anti-Aliasing Filter
Data Loggers
Digital Voltmeters
Weigh Scales
Strain Gauges
..
MAX280EPA+ ,5th-Order, Zero-Error, Butterworth, Switched-Capacitor Lowpass FilterELECTRICAL CHARACTERISTICS
(V' = +5V. V' = AN, TA -- 25°C. unless otherwise specified, AC output ..
MAX281ACPA+ ,5th Order, Zero Error, Bessel, Switched Capacitor Lowpass FilterELECTRICAL CHARACTERISTICS
(V+ = HN, V- = -5V, TA = +25° C. unless otherwise noted, AC output meas ..
MAX281ACWE ,Zero-Error, Bessel Lowpass FilterPin Description
NAME FUNCTION NAME FUNCTION
FB External capacitor couples to the chip COSC Clock ..
MAX6068AEUR+T ,Precision, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage ReferencesApplicationsMAX6062BEUR-T -40°C to +85°C 3 SOT23-3 FZFZAnalog-to-Digital Converters (ADCs)MAX6063AE ..
MAX606ESA ,Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA CardsApplicationsPCMCIA CardsMemory CardsTypical Operating CircuitSingle PCMCIA Slot ProgrammingDigital ..
MAX606ESA+ ,Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converter for Flash Memory PCMCIA CardsFeaturesThe MAX606/MAX607 are the smallest CMOS, step-up♦ Lowest-Height Circuit (1.35mm max)DC-DC c ..
MAX606EUA ,Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA CardsMAX606/MAX60719-0459; Rev 1; 1/99Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Fl ..
MAX606EUA ,Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA CardsFeaturesThe MAX606/MAX607 are the smallest CMOS, step-up' Lowest-Height Circuit (1.35mm max)DC-DC c ..
MAX606EUA ,Low-Profile, 5V/12V or Adjustable, Step-Up DC-DC Converters for Flash Memory/PCMCIA CardsFeaturesThe MAX606/MAX607 are the smallest CMOS, step-up' Lowest-Height Circuit (1.35mm max)DC-DC c ..
MAX280CWE-MAX280EPA
5th Order, Zero DC Error, Lowpass Filter
19-0873; Rev 3; 8/95
2fbiLai)ahAyil
Sth Order, Zero 56 Error, Lemmas Filter
General Description
The MAX280/MXL1082 are 5th-order ail-pole instrumen-
tation lowpass filters with no DC error. The filter uses an
external resistor and capacitor tojsolate the integrated
circuit from the DC signal path, thus providing excellent
DC accuracy.
The resistor and capacitor, along with the on-chip 4th-
order switched capacitor filter, form a 5th-order low-
pass filter. Two MAX280/MXL1062s can be cascaded
to form a 10th-order lowpass filter,
The filter cutoff frequency is set by an internal clock
which can be externally driven. The clock to cutoff-
frequency ratio is 100:1, allowing clock ripple to be
easily removed.
The MAX280 is an enhanced version of the MXL1062.
o Lowpam Fitter with No Dc Error
0 Low Passband Noise
0 DC to 20m: Gutott Frequency
. 5th Order All Polo Filter
. lniemal or Extomal Clock
0 Guadable tor Higher Order Rolktff
o Buffered Output Available
0 8-Pln DIP or 16-Pin SOIC
Ordering Information
Enchancements include tighter specifications on the PART TEMP. RANGE P'N'PACMGE
internal clock oscillator frequency and the buffer ampli- MAX280CPA 0°C to +70%: 8 Lead Plastic DIP
fier offset voltage. MAX280CWE 0°C to +70°C 16 Lead-Wide so
Appmtttthtntt MAX280EPA -40°c to +85°C 8 Lead Plastic DIP
Anti-Aliasing Filter MAX280EWE -40°C to +85°C 16 Lead Wide SO
Data Loggers MAX280MJA 65°C to +1290 8 Lead CERDIP
. . MXL1062CN8 40°C to +85°C 8 Lead Plastic DIP
1iilitf VOItmeters MXL1062CJ8 410°C to +85T 8 Lead CERDIP
Weigh Scales MXLI062CS -4(Y'C to +85°C 16 Lead Wide so
Strain Gauges MXL1062MJ8 -55°C to +125°C 8 Lead CERDiP
lecal Operating Circuit Pin Configurations
Top View
DC ACCURATE
INPUT W» OUTPUT
1 FB OUT F-
BUFFERED
OUTPUT
BOUT ---
MAX280
lt' +5V
-5V - IC Cosc -
Lowpass Filter
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B-Pin 0.300''DIP
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16-Pin 0.300" SO
Maxim Integrated Products 1
& the latest literature: http://www.maxIm-ic.com,
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MAX280/MXIL 1 062
Sth Order, Eero De Error, Lowpass Filter
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V+ to V-) ....Fr._____._....._...m._....Ftt.F..r$ww..... 18V
Input Voltage at Any Pin ...................... V- -0.3V s VIN s V+ +0.3V
Operating Temperature
MAX280CXX/MXL10620 ..................................... 0°C to +70°C
MAXZBOEXX F.$__...F.F..._tt.. ..-40°C to +85°C
MAX280MXX/MXL1062M .............................. -55°C to +125°C
Storage Temperature Range ............................. -65''C to +160°C
Lead Temperature Range (Soldering, 10sec) ............... +300°C
Power Dissipation
Plastic DIP (derate 6.25mWPC above 70°C) ............... SOOmW
CERDIP (derate 8.00mW/“C above 70°C) ... ..640mW
SO (derate 9.52mWPC above 70°C) ..._'...FFt._._.......r.$r. 762mW
Stresses above those listed under "Absolute Maximum leg/i' may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other can
Itions above those indicated in the operational sections of the spetrifltration is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V' = HN, Ir = -5V, T. = 25°C. unless otherwise specified, AC output measured at pin 7, Figure 1.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage
Dual Supply A2.375 18.0 V
Single Supply 4.75 16.0
Cosc (Pin 5 to W) = 100pF
Power Supply Current TA = 25°C 5.0 7.0 mA
TA = Tum to TMAX 5.0 10.0
Input Frequency Range 0-20 kHz
Filter Gain at tom = 100kHz, Pin 4 at V'
C = 0.01PF, R = 25.7mm
fm = 0 0
fm = 0.5tc (Note 1) -0.02 -0.3
fm = to TA = TMIN to TMAX -2 -3 dB
tm = 2fc TA = Tum to TMAX -28 -30
fm = 4ft: TA = Tum to TMAX -54 -60
Clock to Cutoff Frequency Ratio tcck = 100kHz, Pin 4 at V' 100 * 1
fCLK/fc C = 0.01pF, R = 25.78ktt
Filter Gain at fm = 16kHz chK = 400kHz, Pin 4 at V"
C = 0.01PF, R = 6.5k0 M6 -52 dB
TA = TMIN to TMAX
ttxx/te Tempco Same as above 10 ppm/°C
. . . Pin 7 buttered with an ext op
Filter Output (Pin 7) DC Swing amp TA = TWN to TMAX $3.5 A3.8 V
Clock Feedthrough 10 mvpp
INTERNAL BUFFER
Bias Current TA = 25''C 2 50 PA
TA = TMIN to TMAX 170 1000
Offset Voltage " "t C'PA_Fw assgiy . mV
MXL1062 2 20
Voltage Swing R1 = 20kn; TA = Tur: to' TMAx 13.5 $3.8 V
Short Circuit Current Source/Sink 30/2 mA
CLOCK (NOTE 2)
Cost; (Pin 5 to "Y 3m;
. IC) = 100pF MXL1062 I 25 35 50
Internal Oscillator Frequency "m " kHz
Jtoi3'tttTo'"x vac»
050 n to
W) = 100pF MXL1062 15 35 65
Max Clock Frequency 4 MHz
Cosc Input Sink/Source Current TA = Tsm to me 25 80 ttA
Note 1: to is the frequency where the gain is -3d8 with respect to the input signal.
Note 2: The external or driven clock frequency is divided by either 1, 2, or 4 depending upon the voltage at pin 4. When pin 4 =
V', tcut/ft: = 100; when pin 4 = GND, tcut/ft: = 200; pin 4 = t tCLK/fc = 400.
”III Xl/Vl
