MAX7490 Maxim, MAX7490 Datasheet - Page 5

• Manufacturer Part Number: MAX7490
• Description: Dual Universal Switched-Capacitor Filters
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS—MAX7491 (continued)
(V
from COM to GND, 50% duty-cycle clock input, COM = V
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
Note 3: Bandwidth of noise measurement is 80kHz.
Note 4: f
(V
R2 = 10kΩ, Q = 5, T
POWER REQUIREMENTS
Supply Voltage
Power-Supply Current
Shutdown Current
Output Short-Circuit Current
DC Open-Loop Gain
Gain Bandwidth Product
Slew Rate
INTERNAL OP AMPS CHARACTERISTICS
DD
DD
-40
-50
-10
-20
-30
-60
= EXTCLK = +3V, f
10
= +5V for MAX7490, V
0
1
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
OSC
PARAMETER
2ND-ORDER BANDPASS FILTER
(kHz) = 135 x 10
FREQUENCY RESPONSE
Dual Universal Switched-Capacitor Filters
FREQUENCY (kHz)
A
_______________________________________________________________________________________
= +25°C, unless otherwise noted.)
10
CLK
DD
= 625kHz, T
3
= +3V for MAX7491, f
RMS
/ C
OSC
SYMBOL
input signal of the other section.
I
GBW
SHDN
V
(C
I
SR
100
DD
DD
A
OSC
= T
MIN
in pF)
No load, mode 1, R1 = R3 = 50kΩ,
R2 = 10kΩ, Q = 5
SHDN = GND
R
R
R
300
250
200
100
150
50
L
L
L
to T
0
CLK
≥ 10kΩ, C
≥ 10kΩ, C
≥ 10kΩ, C
1
V
f
Q = 5
MAX
CLK
DD
= 625kHz, SHDN = EXTCLK = V
DD
2ND-ORDER BANDPASS FILTER
= +5V
= 625kHz
, 10kΩ || 50pF load to V
/2. Typical values are at T
L
L
L
PHASE RESPONSE
CONDITIONS
≤ 50pF
≤ 50pF
≤ 50pF
FREQUENCY (kHz)
10
Typical Operating Characteristics
RMS
DD
10kHz signal to one bandpass filter section input
/2 at LP_, BP_, and N_/HP_, SHDN = V
100
A
= +25°C, unless otherwise noted.) (Note 1)
DD
, COM = V
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
0
100
MIN
2.7
DD
f
CLK
/2, Mode 1, R3 = R1 = 50kΩ,
/f
TYP
±11
130
O
3.5
7
6
DEVIATION vs. f
V
DD
f
CLK
1000
= 5V
V
(kHz)
DD
MAX
= 3V
3.6
4.0
1
CLK
DD
UNITS
, 0.1µF
MHz
V/µs
mA
mA
µA
dB
10,000
V
5