LTC1164-7 Linear Technology, LTC1164-7 Datasheet - Page 3

• Manufacturer Part Number: LTC1164-7
• Description: Low Power/ Linear Phase 8th Order Lowpass Filter
• Manufacturer: Linear Technology

ELECTRICAL C
V
to passband gain, unless otherwise specified. (Maximum clock rise or fall time 1 s)
PARAMETER
Group Delay (t
t
(Note 2)
Group Delay Deviation
(Note 2)
Input Frequency Range (Table 9)
Maximum f
Clock Feedthrough (f = f
Wideband Noise
(1Hz f < f
Input Impedance
Output DC Voltage Swing (Note 4)
Output DC Offset
Output DC Offset TempCo
Power Supply Current
Power Supply Range
The
Note 1: Input frequencies, f, are linearly phase shifted through the filter as long as
f f
Figure 1 curve shows the typical phase response of an LTC1164-7 operating at
f
shift is described by: phase shift = 180 – F (f/f
F is arbitrarily called the “phase factor” expressed in degrees. The phase factor
together with the specified deviation from the ideal straight line allows the
calculation of the phase at a given frequency. Example: The phase shift at 7kHz of
the LTC1164-7 shown in Figure 1 is: phase shift = 180 – 434 (7kHz/10kHz)
nonlinearity = –123.8
Note 2: Group delay and group delay deviation are calculated from the measured
phase factor and phase deviation specifications.
Note 3: The filter cutoff frequency is abbreviated as f
Note 4: The AC swing is typically 11V
supply respectively. For more information refer to the THD + Noise vs Input graphs.
d
CLK
S
= (1/360)(f/f
= 7.5V, R
C
= 400kHz, f
; f
denotes specifications which apply over the full operating temperature range.
C
= cutoff frequency.
CLK
CLK
d
)
C
)
)
L
C
= 10k, T
= 8kHz and it closely matches an ideal straight line. The phase
CLK
1% or –123.9
A
)
= 25 C, f
HARA TERISTICS
P-P
CUTOFF
, 7V
C
1.24 .
P-P
C
= 8kHz or 4kHz, f
, 2.8V
); f f
CUTOFF
P-P
CONDITIONS
(f
50:1, V
(f
(f
(f
(f
(f
(f
(f
(f
(f
V
V
V
50:1, 5V, Input at GND
V
V
V
V
V
V
100:1, V
50:1, V
100:1, V
V
V
V
C
S
S
S
S
S
S
S
S
S
S
S
S
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
.
= Single 5V (Pins 3 and 5 at 2V)
= 5V
= 7.5V
= 2.5V
= 5V
= 7.5V
= 2.375V
= 5V
= 7.5V
= 2.375V, T
= 5V, T
= 7.5V, T
for 7.5V, 5V, 2.5V
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
C
C
C
C
C
C
C
C
C
C
or f
S
S
) = 50:1, f f
) = 100:1, f f
) = 50:1, f f
) = 100:1, f f
) = 50:1, f f
) = 100:1, f f
) = 50:1, f f
) = 100:1, f f
) = 50:1
) = 100:1
S
S
= 5V
= 5V
C
= 5V
= 5V
.
A
CLK
= 25 C
A
= 25 C
A
= 400kHz, TTL or CMOS level and all gain measurements are referenced
= 25 C
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
Figure 1. Phase Response in the Passband (Note 1)
–180
–270
–360
–90
180
90
0
0
1
2
3
149.3
293.8
FREQUENCY (kHz)
MIN
2.375
1.25
3.70
5.40
35
4
5
151.0 1
297.2 1
105 5%
115 5%
6
<f
95 5%
<f
f
(f
CLK
TYP
100
CLK
2.5
4.5
7.0
CLK
55
100
100
200
200
1.4
1.0
1.0
3.9
6.1
CLK
1
1
1
7
= 500kHz
/f
/2
C
8
) = 50:1
LTC1164-7
1164-7 F01
9
153.5
301.4
MAX
11.0
12.5
10
90
4.0
4.5
7.0
8.0
220
2.0
2.5
8
UNITS
V
V
V
V
3
MHz
MHz
MHz
V/ C
V/ C
RMS
RMS
RMS
RMS
kHz
kHz
mV
mV
mA
mA
mA
mA
mA
mA
k
%
%
%
%
V
V
V
V
s
s
s
s