6
LTC1164-6
11646fa
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
THD + Noise vs RMS Input for
Single 5V (Elliptic Response)
INPUT (V
RMS
)
THD + NOISE (dB)
1164-6 G18
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
0.1 1 2
A
B
A. GND = 2.5V
B. GND = 2V
(f
CLK
/f
C
) = 100:1 OR 50:1
f
IN
= 1kHz, T
A
= 25°C
THD + Noise vs RMS Input
(Elliptic Response)
INPUT (V
RMS
)
0.1
THD + NOISE (dB)
15
1164-6 G17
–40
–45
–50
–55
–60
–65
–70
–75
–80
–85
–90
V
S
= ±7.5V
V
S
= ±5V
(f
CLK
/f
C
) = 100:1 OR 50:1
f
IN
= 1kHz, T
A
= 25°C
Power Supply Current vs Power
Supply Voltage
POWER SUPPLY (V
+
OR V
–
)
0
CURRENT (mA)
12
11
10
9
8
7
6
5
4
3
2
1
0
13 68
1164-6 G19
1024579
–55°C
25°C
125°C
2V/DIV
1ms/DIV
1164-6 G21
V
S
= ±7.5V, V
IN
= ±3V 100Hz SQUARE WAVE
f
CLK
= 800kHz, (f
CLK
/f
C
) = 160:1, f
CUTOFF
= 5kHz
LINEAR PHASE RESPONSE
Transient Response
Transient Response
1164-6 G20
1ms/DIV
V
S
= ±7.5V, V
IN
= ±3V 100Hz SQUARE WAVE
f
CLK
= 500kHz, (f
CLK
/f
C
) = 100:1, f
CUTOFF
= 5kHz
ELLIPTIC RESPONSE
2V/DIV
at least a 1µF capacitor (Figure 2). For single 5V operation
at the highest f
CLK
of 1MHz, Pins 3 and 5 should be biased
at 2V. This minimizes passband gain and phase variations
(see Typical Performance Characteristics curves: Maxi-
mum Passband for Single 5V, 50:1; and THD + Noise vs
RMS Input for Single 5V, 50:1).
V
+
(Pins 4, 12):The V
+
(Pin 4) and the V
–
(Pin 12) should
be bypassed with a 0.1µF capacitor to an adequate analog
ground. The filter’s power supplies should be isolated
from other digital or high voltage analog supplies. A low
noise linear supply is recommended. Using a switching
power supply will lower the signal-to-noise ratio of the
filter. The supply during power-up should have a slew rate
less than 1V/µs. When V
+
is applied before V
–
and V
–
(14-Lead Dual-In-Line Package)
PI FU CTIO S
U
UU
NC (Pins 1, 8, 13): Pins 1, 8, and 13 are not connected to
any internal circuit point on the device and should prefer-
ably be tied to analog ground.
V
IN
(Pin 2): The input pin is connected internally through
a 50k resistor tied to the inverting input of an op amp.
GND (Pins 3, 5): The filter performance depends on the
quality of the analog signal ground. For either dual or
single supply operation, an analog ground plane sur-
rounding the package is recommended. The analog ground
plane should be connected to any digital ground at a single
point. For dual supply operation, Pins 3 and 5 should be
connected to the analog ground plane. For single supply
operation Pins 3 and 5 should be biased at 1/2 supply and
they should be bypassed to the analog ground plane with
