LTC1065 Linear Technology, LTC1065 Datasheet - Page 4

• Manufacturer Part Number: LTC1065
• Description: DC Accurate/ Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter
• Manufacturer: Linear Technology

LTC1065
The
temperature range.
Note 1: The maximum clock frequency is arbitrarily defined as: the
frequency at which the filter AC response exhibits 1dB of gain peaking.
Note 2: At limited temperature ranges (i.e., T
frequency can be as low as 10Hz. The typical minimum clock frequency is
arbitrarily defined as: the clock frequency at which the output DC offset
changes by more than 1mV.
4
ELECTRICAL C
TYPICAL PERFOR
–10
–20
–30
–40
–50
–60
–70
–80
–90
110
100
10
90
80
70
60
50
40
30
20
10
0
1
denotes specifications which apply over the full operating
Self-Clocking Frequency vs R
Gain vs Frequency; V
A. f
B. f
C. f
V
T
100
A
IN
= 25°C
CLK
CLK
CLK
= 750mV
= 0.5MHz
= 1MHz
= 2MHz
INPUT FREQUENCY (kHz)
FREQUENCY (kHz)
RMS
10
300
A
C = 200pF
f
OSC
4
HARA TERISTICS
S
B
LTC1065
1/RC
= 2.5V
R
C
W
5
100
500
A
1065 G04
C
1065 G01
C
200
U
A
CE
50 C) the minimum clock
C
–10
–20
–30
–40
–50
–60
–70
–80
–90
HARA TERISTICS
10
50
45
40
35
30
25
20
15
10
0
5
0
10
Gain vs Frequency; V
1
Output Offset vs Clock,
Low Clock Rates
A
A. f
B. f
C. f
D. f
V
T
V
A. T
B. T
A
IN
S
= 25°C
CLK
CLK
CLK
CLK
EXTERNAL CLOCK FREQUENCY (Hz)
= ±5V
= 1.4V
A
A
B
= 25°C
= 85°C
= 1MHz
= 2MHz
= 3MHz
= 4MHz
C
INPUT FREQUENCY (kHz)
RMS
10
110
Note 3: The wideband noise specification does not include the clock
feedthrough.
Note 4: To properly evaluate the filter’s harmonic distortion an inverting
output buffer is recommended. An output buffer (although recommended)
is not necessarily needed when measuring output DC offset or wideband
noise (see Figure 3).
Note 5: The output DC offset is optimized for 5V supply. The output DC
offset shifts when the power supplies change; however this phenomenon
is repeatable and predictable.
S
A
= 5V
B C
100
1065 G05
1065 G02
D
200
210
–20
–30
–40
–50
–60
–70
–80
–90
–10
10
–1
–2
–3
–4
–5
0
5
4
3
2
1
0
1
0
Output Offset vs Clock,
Medium Clock Rates
Gain vs Frequency; V
A. f
B. f
C. f
D. f
E.f
V
T
IN
A
V
V
V
CLK
= 25°C
CLK
CLK
CLK
CLK
EXTERNAL CLOCK FREQUENCY (kHz)
= 1.4V
S
S
S
= ±7.5V
= ±5V
= ±2.5V
= 1MHz
= 2MHz
= 3MHz
= 5MHz
= 4MHz
INPUT FREQUENCY (kHz)
RMS
10
500
A
S
B C
= 7.5V
100
1065 G06
1065 G03
D
E
200
1000