LTC1064-7M Linear Technology, LTC1064-7M Datasheet - Page 3

• Manufacturer Part Number: LTC1064-7M
• Description: Linear Phase/ 8th Order Lowpass Filter
• Manufacturer: Linear Technology

V
and all gain measurements are referenced to passband gain, unless otherwise specified.
ELECTRICAL C
PARAMETER
Group Delay (t
t
(Note 2)
Group Delay Deviation
(Notes 2, 3)
Input Frequency Range (Table 9)
Maximum f
Clock Feedthrough (f f
Wideband Noise
(1Hz f f
Input Impedance
Output DC Voltage Swing
(Note 5)
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 LTC1064-7 operating at f
1MHz, ratio = 50:1, f
shift is described by: phase shift = 180 – F (f/f
F is arbitrarily called the “phase factor” expressed in degrees. The phase factor allows
the calculation of the phase at a given frequency. Example: The phase shift at 14kHz of
the LTC1064-7 shown in Figure 1 is:
phase shift = 180 – 430 (14kHz/20kHz) nonlinearity = –121
Note 2: Group delay and group delay deviation are calculated from the measured phase
factor and phase deviation specifications.
Note 3: Phase deviation and group delay deviation for LTC1064-7MJ is 4%.
Note 4: The filter cutoff frequency is abbreviated as f
Note 5: The AC swing is typically 11V
Supply respectively. For more information refer to the THD + Noise vs Input graphs.
d
C
–121
S
; f
= ( F /360)(1/ f
= 7.5V, R
C
= cutoff frequency.
denotes specifications which apply over the full operating temperature range.
1.20 .
CLK
CLK
d
)
)
L
C
)
= 10k, T
C
= 20kHz and it closely matches an ideal straight line. The phase
CLK
A
)
= 25 C, f
HARA TERISTICS
P-P
CUTOFF
, 7V
C
P-P
= 10kHz or 20kHz, f
C
, 2.8V
); f f
CUTOFF
P-P
CONDITIONS
(f
(f
(f
(f
(f
(f
(f
(f
(f
(f
V
V
V
50:1
V
V
V
V
V
V
50:1, 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
.
, with 7.5V, 5V, 2.5V
= 5V (AGND = 2V)
= 5V
= 7.5V
= 2.5V
= 5V
= 7.5V
= 2.375V
= 5V
= 7.5V
= 2.375V, T
= 5V, T
= 7.5V, T
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
or f
C
C
C
C
C
C
C
C
C
C
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
1% or
= 25 C
A
CLK
= 25 C
A
= 25 C
= 1MHz, TTL or CMOS level (maximum clock rise and fall time 1 s)
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CUTOFF
CLK
=
Figure 1. Phase Response in the Passband (Note 1)
–180
–270
–360
–90
180
90
0
0
2
4
115.0
MIN
2.375
58.6
25
1.0
2.1
3.0
6
FREQUENCY (kHz)
8
117.0 1.0
10
105 5%
115 5%
59.7 0.5
<f
95 5%
117.0
<f
TYP
200
59.7
CLK
2.0
3.5
5.0
12
40
11
14
17
150
150
200
200
1.2
1.0
1.0
3.2
5.0
CLK
/2
14
f
RATIO = 50:1
CLK
LTC1064-7
16
= 1MHz
119.0
MAX
18
1164-7 F01
60.7
70
22
22
26
28
28
32
220
2.0
2.0
8
20
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