LTC1069-7 Linear Technology, LTC1069-7 Datasheet - Page 3

• Manufacturer Part Number: LTC1069-7
• Description: Linear Phase 8th Order Lowpass Filter
• Manufacturer: Linear Technology

f
fall time 1 s), R
PARAMETER
Gain at 5.0f
Gain at f
Phase at 0.5f
Phase at f
Passband Phase Deviation from
Linear Phase (Note 1)
Output DC Offset (Input at GND)
Output Voltage Swing
Power Supply Current
The
temperature range.
Note 1: Phase Deviation = 1/2(Phase at 0Hz – Phase at f
at 0Hz – Phase at 0.5f
TYPICAL PERFORMANCE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
CUTOFF
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
1.0
0.5
0
denotes specifications which apply over the full operating
1
Passband Gain vs Frequency
CUTOFF
Phase at 0Hz = 180 (guaranteed by design)
is the filter’s cutoff frequency and is equal to f
CUTOFF
3
CUTOFF
CUTOFF
5
(160kHz)
7
FREQUENCY (kHz)
L
CUTOFF
= 10k, T
9
11
)
13
A
V
f
f
V
= 25 C, unless otherwise specified. All AC gains are measured relative to the passband gain.
CLK
C
15
S
IN
= 20kHz
= 5V
W
= 2V
= 500kHz
LTC1069-7 • TPC01
17
RMS
19
U
21
CONDITIONS
V
f
V
f
V
f
V
f
V
V
V
V
V
V
V
TEST
TEST
TEST
TEST
S
S
S
S
S
S
S
S
S
S
S
= 4.75V, f
= 5V, f
= 5V, f
= 5V, f
= 5V, f
= 5V, f
= 4.75V, f
= 5V, I
= 4.75V, I
= 5V, f
= 4.75V, f
= 100kHz, V
= 160kHz, V
= 50kHz
= 100kHz
CUTOFF
–50
–10
–20
–30
–40
10
0
CLK
CLK
CLK
CLK
CLK
SOURCE
CLK
21
CLK
CLK
SOURCE
CLK
Transition Band Gain vs Frequency
CLK
) – (Phase
= 4MHz
= 2.5MHz
= 2.5MHz
= 500kHz
= 500kHz
= 500kHz
23
= 500kHz
= 400kHz
= 400kHz
IN
IN
/25. The f
/I
SINK
= 0.5V
= 1V
/I
25
SINK
27
RMS
FREQUENCY (kHz)
1mA, R
RMS
1mA, R
29
CLK
31
Example: An LTC1069-7 has Phase at 0.5f
f
Passband Phase Deviation from Linear Phase
CUTOFF
signal level is TTL or CMOS (max clock rise or
L
= 10k
L
33
= 10k
V
f
f
V
CLK
C
35
= – 235 .
S
IN
= 1/2[180 – (– 235 )] – [(180 – (– 30.5 )] = – 3
= 20kHz
= 5V
= 2V
= 500kHz
LTC1069-7 • TPC02
37
RMS
39
41
–40
–42
–44
–46
–48
–50
–52
–54
–56
–58
–60
41
Stopband Gain vs Frequency
45
– 240
MIN
– 70
– 35
3.5
2.6
49
CUTOFF
53
– 30.5
FREQUENCY (kHz)
– 235
– 2.1
– 3.0
TYP
–59
50
25
18
13
4.0
3.6
= – 30.5 and Phase at
57
LTC1069-7
61
– 230
MAX
16.5
– 55
– 25
125
26
29
15
65
V
f
f
V
CLK
C
69
S
IN
= 20kHz
= 5V
= 2V
= 500kHz
LTC1069-7 • TPC03
73
RMS
UNITS
77
3
V
Deg
Deg
Deg
mV
mV
mA
mA
mA
mA
P-P
dB
dB
81
V