4

LTC1065

1065fb

INPUT FREQUENCY (kHz)

1

10

100

1065 G06

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

200

A

B

C

A. fCLK = 1MHz

B. fCLK = 2MHz

C. fCLK = 3MHz

D. fCLK = 4MHz

E. fCLK = 5MHz

VIN = 1.4VRMS

TA = 25°C

E

D

INPUT FREQUENCY (kHz)

1

10

100

1065 G05

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

200

A

B

C

D

A. fCLK = 1MHz

B. fCLK = 2MHz

C. fCLK = 3MHz

D. fCLK = 4MHz

VIN = 1.4VRMS

TA = 25°C

INPUT FREQUENCY (kHz)

1

10

100

1065 G04

B

C

VIN = 750mVRMS

TA = 25°C

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

200

A

A. fCLK = 0.5MHz

B. fCLK = 1MHz

C. fCLK = 2MHz

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

VS = ±7.5V

VS = ±5V

VS = ±2.5V

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

fOSC ≅ 1/RC

Gain vs Frequency; VS = ±7.5V

Gain vs Frequency; VS = ±2.5V

Gain vs Frequency; VS = ±5V

CC

HARA TERISTICS

A

TYPICALPERFOR

CE

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., TA ≤ 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)

50

45

40

35

30

25

20

15

10

5

0

1065 G02

10

110

210

A

B

A. TA = 25°C

B. TA = 85°C

VS = ±5V