4

LTC1065

ELECTRICAL C

C

HARA TERISTICS

Output Offset vs Clock,

Medium Clock Rates

Self-Clocking Frequency vs R

Output Offset vs Clock,

Low Clock Rates

EXTERNAL CLOCK FREQUENCY (kHz)

5

4

3

2

1

0

–1

–2

–3

–4

–5

1065 G03

500

1000

0

FREQUENCY (kHz)

110

100

90

80

70

60

50

40

30

20

10

1065 G01

100

300

500

LTC1065

R

C

4

5

C = 200pF

INPUT FREQUENCY (kHz)

1

10

100

1065 G04

B

C

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

200

A

INPUT FREQUENCY (kHz)

1

10

100

1065 G05

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

200

A

B

C

D

CC

HARA TERISTICS

A

TYPICALPERFOR

CE

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.

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 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.

INPUT FREQUENCY (kHz)

1

10

100

1065 G06

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

200

A

B

C

E

D

EXTERNAL CLOCK FREQUENCY (Hz)

50

45

40

35

30

25

20

15

10

5

0

1065 G02

10

110

210

A

B