MAX7490-MAX7491 查看數據表（PDF） - Maxim Integrated
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MAX7490-MAX7491 Datasheet PDF : 18 Pages
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Dual Universal Switched-Capacitor Filters
ABSOLUTE MAXIMUM RATINGS
VDD to GND ..............................................................-0.3V to +6V
EXTCLK, SHDN to GND ...........................................-0.3V to +6V
INV_, LP_, BP_, N_/HP_, S_, COM,
CLK to GND............................................-0.3V to (VDD + 0.3V)
Maximum Current into Any Pin ...........................................50mA
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.30mW/°C above +70°C).........667mW
Operating Temperature Range
MAX749_CEE .....................................................0°C to +70°C
MAX749_EEE ...................................................-40°C to +85°C
Die Temperature ..............................................................+150°C
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS—MAX7490
(VDD = VEXTCLK = +5V; 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
Center Frequency Range
SYMBOL
fO
Mode 1
CONDITIONS
MIN TYP MAX UNITS
0.001 to
kHz
40
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
VOS1
VOS2
VOS3
VCOM
RCOM
Mode 1, R1 = R3 = 50kΩ, R2 = 10kΩ, Q = 5
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
VDD/2
- 0.5
VDD/2
- 0.2
140
0.2
±0.2
±2
%
±1
ppm/°C
±5
ppm/°C
±0.1 ±0.5
%
±3
±12.5
±4
±15
mV
±4
±30
-60
dB
VDD/2
VDD/2
250
200
VDD/2
+ 0.5
VDD/2
+ 0.2
325
V
kΩ
μVRMS
60
μVRMS
VDD - 0.2 V
±0.1
±10
μA
fCLK
fOSC
EXTCLK = GND, COSC = 1000pF
EXTCLK = GND, COSC = 100pF
4
MHz
95
135
175
kHz
1.35
MHz
VDD - 0.5
V
2 _______________________________________________________________________________________
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