OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX7491CEE+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
MAX7490/MAX7491
Dual Universal Switched-Capacitor Filters
4 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
FILTER
Center Frequency Range f
O
Mode 1
0.001 to
40
kHz
Clock-to-Center Frequency
Accuracy
f
CLK
/f
O
Mode 1, R1 = R3 = 50kΩ , R2 = 10kΩ,
Q = 5, deviation from 100:1
±0.2 ±0.7 %
Q Accuracy
Mode 1, R1 = R3 = 50kΩ, R2 = 10kΩ,
Q = 5
±0.2 ±2%
f
O
Temperature Coefficient ±1 ppm/°C
Q Temperature Coefficient ±5 ppm/°C
DC Lowpass Gain Accuracy Mode 1, R1 = R2 = 10kΩ±0.1 ±0.5 %
V
OS1
DC offset of input inverter ±3 ±12.5
V
OS2
DC offset of 1st integrator ±4 ±15
DC Offset Voltage
(Figure 8)
V
OS3
DC offset of 2nd integrator ±4 ±25
mV
Crosstalk (Note 2) f
IN
= 10kHz -60 dB
Input: COM externally driven
V
DD
/2
- 0.1
V
DD
/2
V
DD
/2
+ 0.1
COM Voltage Range V
COM
Output: COM internally driven
V
DD
/2
- 0.1
V
DD
/2
V
DD
/2
+ 0.1
V
Input Resistance at COM R
COM
60 80 120 kΩ
Clock Feedthrough Up to 5th harmonic of f
CLK
200 μV
RMS
Noise (Note 3)
Mode 1, R1= R2 = R3 = 10kΩ,
LP output, Q = 1
60 μV
RMS
Output Voltage Swing 0.2 V
D D
- 0.2 V
Input Leakage Current at COM SHDN = GND, V
COM
= 0 to V
DD
±0.1 ±10 μA
CLOCK
Maximum Clock Frequency f
CLK
4 MHz
EXTCLK = GND, C
OSC
= 1000pF 95 135 175 kHz
Internal Oscillator Frequency
(Note 4)
f
OSC
EXTCLK = GND, C
OSC
= 100pF 1.35 MHz
Clock Input High V
DD
- 0.5 V
Clock Input Low 0.5 V
Clock Duty Cycle 50 ±5%
SHDN AND EXTCLK
Input High V
IH
V
DD
- 0.5 V
Input Low V
IL
0.5 V
Input Leakage Current V
INPUT
= 0 to V
DD
±0.4 ±10 μA
ELECTRICAL CHARACTERISTICS—MAX7491
(V
DD
= V
EXTCLK
= +3V; f
CLK
= 625kHz; 10kΩ || 50pF load to V
DD
/2 at LP_, BP_, and N_/HP_; V
SHDN
= V
DD
; 0.1µF from COM to
GND; 50% duty-cycle clock input; COM = V
DD
/2; T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.)
(Note 1)
MAX7490/MAX7491
Dual Universal Switched-Capacitor Filters
_______________________________________________________________________________________ 5
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER REQUIREMENTS
Supply Voltage V
DD
2.7 3.6 V
Power-Supply Current I
DD
No load, mode 1, R1 = R3 = 50kΩ,
R2 = 10kΩ, Q = 5
3.5 4.0 mA
Shutdown Current I
SHDN
SHDN = GND 1 μA
INTERNAL OP AMPS CHARACTERISTICS
Output Short-Circuit Current ±11 mA
DC Open-Loop Gain R
L
≥ 10kΩ, C
L
≤ 50pF 130 dB
Gain Bandwidth Product GBW R
L
≥ 10kΩ, C
L
≤ 50pF 7 MHz
Slew Rate SR R
L
≥ 10kΩ, C
L
≤ 50pF 6 V/μs
Note 1: Resistive loading of the N_/HP_, LP_, BP_ outputs includes the resistors used for the filter implementation.
Note 2: Crosstalk between internal filter sections is measured by applying a 1V
RMS
10kHz signal to one bandpass filter section input
and grounding the input of the other bandpass filter section. The crosstalk is the ratio between the output of the grounded
filter section and the 1V
RMS
input signal of the other section.
Note 3: Bandwidth of noise measurement is 80kHz.
Note 4: f
OSC
(kHz) = 135 x 10
3
/ C
OSC
(C
OSC
in pF)
ELECTRICAL CHARACTERISTICS—MAX7491 (continued)
(V
DD
= V
EXTCLK
= +3V; f
CLK
= 625kHz; 10kΩ || 50pF load to V
DD
/2 at LP_, BP_, and N_/HP_; V
SHDN
= V
DD
; 0.1µF from COM to
GND; 50% duty-cycle clock input; COM = V
DD
/2; T
A
= T
MIN
to T
MAX
. Typical values are at T
A
= +25°C, unless otherwise noted.)
(Note 1)
Typical Operating Characteristics
(V
DD
= +5V for MAX7490, V
DD
= +3V for MAX7491, f
CLK
= 625kHz, V
SHDN
= V
EXTCLK
= V
DD
, COM = V
DD
/2, Mode 1, R3 = R1 = 50kΩ,
R2 = 10kΩ, Q = 5, T
A
= +25°C, unless otherwise noted.)
10
-60
1 10 100
2ND-ORDER BANDPASS FILTER
FREQUENCY RESPONSE
-50
MAX7490-01
FREQUENCY (kHz)
GAIN (dB)
-30
-40
-10
-20
0
300
0
110100
2ND-ORDER BANDPASS FILTER
PHASE RESPONSE
50
MAX7490-02
FREQUENCY (kHz)
PHASE (%)
100
200
150
250
V
DD
= +5V
f
CLK
= 625kHz
Q
= 5
0
-0.8
100 1000 10,000
CLOCK-TO-CENTER FREQUENCY
DEVIATION vs. CLOCK FREQUENCY
-0.7
MAX7490-03
f
CLK
(kHz)
f
CLK
/f
O
DEVIATION (%)
-0.6
-0.2
-0.3
-0.4
-0.5
-0.1
V
DD
= 5V
V
DD
= 3V
MAX7490/MAX7491
Dual Universal Switched-Capacitor Filters
6 _______________________________________________________________________________________
-0.6
-0.4
-0.5
-0.3
-0.2
-0.1
0
0.1
0.2
04020 60 80 100
CLOCK-TO-CENTER FREQUENCY
DEVIATION vs. Q
MAX7490-04
Q
f
CLK
/f
O
DEVIATION (%)
V
DD
= 5V
V
DD
= 3V
-0.7
-0.3
-0.4
-0.6
-0.2
-0.5
-0.1
0
0.1
0.3
0.2
0.4
0.5
0.6
0.7
-40 10-15 35 60 85
CLOCK-TO-CENTER FREQUENCY
DEVIATION vs. TEMPERATURE
MAX7490-05
TEMPERATURE (
°
C)
f
CLK
/f
O
DEVIATION (%)
1
-6
100 1000 10,000
Q DEVIATION vs. CLOCK FREQUENCY
-5
MAX7490-06
f
CLK
(kHz)
Q DEVIATION (%)
-4
-1
-2
-3
0
V
DD
= 3V
V
DD
= 5V
-2.0
-1.0
-1.5
-0.5
0
0.5
1.0
1.5
2.0
-40 10-15 35 60 85
Q DEVIATION vs. TEMPERATURE
MAX7490-07
TEMPERATURE (°C)
Q DEVIATION (%)
0
150
100
50
200
250
300
350
400
450
500
04020 60 80 100
NOISE vs. Q
MAX7490-08
Q
NOISE (µV
RMS
)
3.0
3.2
3.1
3.4
3.3
3.6
3.5
3.7
-40 10-15 356085
SUPPLY CURRENT vs. TEMPERATURE
MAX7490-09
TEMPERATURE (°C)
I
DD
(mA)
V
DD
= 5V
V
DD
= 3V
3.0
3.3
3.2
3.1
3.4
3.5
3.6
3.7
3.8
3.9
4.0
3.0 4.03.5 4.5 5.0 5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX7490-10
V
DD
(V)
I
DD
(mA)
f
CLK
= 3MHz
f
CLK
= 625kHz
f
CLK
= 2kHz
3.32
3.34
3.33
3.37
3.36
3.35
3.40
3.39
3.38
3.41
3.0 4.03.5 4.5 5.0 5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX7490-11
V
DD
(V)
I
DD
(mA)
-40°C
+25°C
+85°C
-20
-120
1k 10k
MAX7491
THD + NOISE vs. FREQUENCY
MAX7490-12
INPUT FREQUENCY (Hz)
THD + NOISE (dB)
-30
-40
-50
-60
-70
-80
-90
-100
-110
A
B
A = MODE 1
B = MODE 3
Typical Operating Characteristics (continued)
(V
DD
= +5V for MAX7490, V
DD
= +3V for MAX7491, f
CLK
= 625kHz, V
SHDN
= V
EXTCLK
= V
DD
, COM = V
DD
/2, Mode 1, R3 = R1 = 50kΩ,
R2 = 10kΩ, Q = 5, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX7491CEE+

Mfr. #:
Buy MAX7491CEE+
Manufacturer:
Maxim Integrated
Description:
Active Filter Dual Universal Switched-Cap
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet