MAX7490_09 查看數據表（PDF） - Maxim Integrated
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MAX7490_09 Datasheet PDF : 18 Pages
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Dual Universal Switched-Capacitor Filters
ELECTRICAL CHARACTERISTICS—MAX7491
(VDD = VEXTCLK = +3V; fCLK = 625kHz; 10kΩ || 50pF load to VDD/2 at LP_, BP_, and N_/HP_; VSHDN = VDD; 0.1µF from COM to
GND; 50% duty-cycle clock input; COM = VDD/2; TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.)
(Note 1)
PARAMETER
FILTER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Center Frequency Range
fO
Mode 1
0.001 to
40
kHz
Clock-to-Center Frequency
Accuracy
fCLK/fO
Mode 1, R1 = R3 = 50kΩ , R2 = 10kΩ,
Q = 5, deviation from 100:1
±0.2
±0.7
%
Q Accuracy
fO Temperature Coefficient
Q Temperature Coefficient
DC Lowpass Gain Accuracy
DC Offset Voltage
(Figure 8)
Crosstalk (Note 2)
COM Voltage Range
Input Resistance at COM
Clock Feedthrough
Noise (Note 3)
Output Voltage Swing
Input Leakage Current at COM
CLOCK
Maximum Clock Frequency
Internal Oscillator Frequency
(Note 4)
Clock Input High
Clock Input Low
Clock Duty Cycle
SHDN AND EXTCLK
Input High
Input Low
Input Leakage Current
Mode 1, R1 = R3 = 50kΩ, R2 = 10kΩ,
Q=5
VOS1
VOS2
VOS3
VCOM
RCOM
Mode 1, R1 = R2 = 10kΩ
DC offset of input inverter
DC offset of 1st integrator
DC offset of 2nd integrator
fIN = 10kHz
Input: COM externally driven
Output: COM internally driven
Up to 5th harmonic of fCLK
Mode 1, R1= R2 = R3 = 10kΩ,
LP output, Q = 1
SHDN = GND, VCOM = 0 to VDD
fCLK
fOSC
EXTCLK = GND, COSC = 1000pF
EXTCLK = GND, COSC = 100pF
VIH
VIL
VINPUT = 0 to VDD
±0.2
±2
%
VDD/2
- 0.1
VDD/2
- 0.1
60
±1
±5
±0.1
±3
±4
±4
-60
VDD/2
VDD/2
80
200
±0.5
±12.5
±15
±25
VDD/2
+ 0.1
VDD/2
+ 0.1
120
ppm/°C
ppm/°C
%
mV
dB
V
kΩ
μVRMS
60
μVRMS
0.2
VDD - 0.2 V
±0.1
±10
μA
4
MHz
95
135
175
kHz
1.35
MHz
VDD - 0.5
V
0.5
V
50 ±5
%
VDD - 0.5
V
0.5
V
±0.4
±10
μA
4 _______________________________________________________________________________________
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