Electrical characteristics (continued), Filter characteristics – Rainbow Electronics MAX7480 User Manual
Page 3
MAX7480
8th-Order, Lowpass, Butterworth,
Switched-Capacitor Filter
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +5V, filter output measured at OUT, 10k
Ω
|| 50pF load to GND at OUT, OS = COM, 0.1µF from COM to GND, SHDN =
V
DD
, f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MIN
TYP
MAX
SYMBOL
PARAMETER
Measured at DC
SHDN = GND, CLK driven from 0 to V
DD
Operating mode, no load, IN = OS = COM
0.5
V
SDL
SHDN Input Low
V
DD
- 0.5
V
SDH
SHDN Input High
60
PSRR
Power-Supply Rejection Ratio
0.2
1
I
SHDN
Shutdown Current
2.9
3.5
Supply Current
I
DD
4.5
5.5
V
DD
Supply Voltage
V
V
dB
µA
mA
V
UNITS
SHDN Input Leakage Current
V
SHDN
= 0 to V
DD
±0.1
±10
µA
POWER REQUIREMENTS
SHUTDOWN
FILTER CHARACTERISTICS
(V
DD
= +5V, filter output measured at OUT, 10k
Ω
||
50pF load to GND at OUT, SHDN = V
DD
, V
COM =
V
OS =
V
DD
/2
,
f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Note 1:
The maximum f
C
is defined as the clock frequency f
CLK
= 100
·
f
C
at which the peak SINAD drops to 68dB with a sinusoidal
input at 0.2f
C
.
Note 2:
DC insertion gain is defined as
∆
V
OUT
/
∆
V
IN
.
Note 3:
OS voltages above V
DD
- 1V saturate the input and result in a 75µA typical input leakage current.
Note 4:
f
OSC
(kHz)
≅
53
·
10
3
/ C
OSC
(pF).
f
IN
= 0.5f
C
-0.1
0.0
f
IN
= 2f
C
f
IN
= f
C
-3.5
-3.0
-2.5
Insertion Gain Relative to
DC Gain
-48
-43
f
IN
= 3f
C
dB
-76
-70
CONDITIONS
UNITS
MIN
TYP
MAX
PARAMETER