Datasheet

MAX7490/MAX7491
Dual Universal Switched-Capacitor Filters
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
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
POWER REQUIREMENTS
Supply Voltage V
DD
4.5 5.5 V
Power-Supply Current I
DD
No external 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 ±18 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 6.4 V/μs
ELECTRICAL CHARACTERISTICS—MAX7490 (continued)
(V
DD
= V
EXTCLK
= +5V; 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)