Datasheet
4
LTC1065
1065fb
INPUT FREQUENCY (kHz)
1
GAIN (dB)
10
100
1065 G06
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
200
A
B C
A. f
CLK
= 1MHz
B. f
CLK
= 2MHz
C. f
CLK
= 3MHz
D. f
CLK
= 4MHz
E. f
CLK
= 5MHz
V
IN
= 1.4V
RMS
T
A
= 25°C
E
D
INPUT FREQUENCY (kHz)
1
GAIN (dB)
10
100
1065 G05
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
200
A
B C
D
A. f
CLK
= 1MHz
B. f
CLK
= 2MHz
C. f
CLK
= 3MHz
D. f
CLK
= 4MHz
V
IN
= 1.4V
RMS
T
A
= 25°C
INPUT FREQUENCY (kHz)
1
GAIN (dB)
10
100
1065 G04
B C
V
IN
= 750mV
RMS
T
A
= 25°C
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
200
A
A. f
CLK
= 0.5MHz
B. f
CLK
= 1MHz
C. f
CLK
= 2MHz
E
LECTR
IC
AL C CHARA TERIST
ICS
Output Offset vs Clock,
Medium Clock RatesSelf-Clocking Frequency vs R
Output Offset vs Clock,
Low Clock Rates
EXTERNAL CLOCK FREQUENCY (kHz)
OUTPUT OFFSET (mV)
5
4
3
2
1
0
–1
–2
–3
–4
–5
1065 G03
500
1000
0
V
S
= ±7.5V
V
S
= ±5V
V
S
= ±2.5V
FREQUENCY (kHz)
R PINS 4 TO 5 (kΩ)
110
100
90
80
70
60
50
40
30
20
10
1065 G01
100 300
500
LTC1065
R
C
4
5
C = 200pF
f
OSC
≅ 1/RC
Gain vs Frequency; V
S
= ±7.5VGain vs Frequency; V
S
= ±2.5V Gain vs Frequency; V
S
= ±5V
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The maximum clock frequency is arbitrarily defined as the
frequency at which the filter AC response exhibits ≥ 1dB of gain peaking.
Note 3: At limited temperature ranges (i.e., T
A
≤ 50°C) the minimum clock
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.
Note 4: The wideband noise specification does not include the clock
feedthrough.
Note 5: 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 6: 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.
Note 7: The LTC1065C is guaranteed to meet the specified performance
from 0°C to 70°C and is designed, characterized and expected to meet
specified performance from –40°C to 85°C but is not tested or QA
sampled at these temperatures. The LTC1065I is guaranteed to meet
specified performance from –40°C to 85°C.
EXTERNAL CLOCK FREQUENCY (Hz)
OUTPUT OFFSET (mV)
50
45
40
35
30
25
20
15
10
5
0
1065 G02
10
110
210
A
B
A. T
A
= 25°C
B. T
A
= 85°C
V
S
= ±5V