LTC1064-4

8

10644fb

Figure 3. Level Shifting the Input T2L Clock

for Single Supply Operation ≥6V.

Figure 4. Buffering the Filter Output. The Buffer Op Amp

Should Not Share the LTC1064-4 Power Lines.

Figure 5. Adding an Output Buffer-Filter to Eliminate Any Clock Feedthrough.

Passband Error of Output Buffer is ±0.1dB to 50kHz, –3dB at 94kHz.

LTC1064-4

1

2

3

4

5

6

7

14

13

12

11

10

9

8

V+

1064-4 F03

0.1µF

5k

2.2k

5k

5k

1µF

T2L

LEVEL

V+

1N5817

COMP2*

V–

fCLK

50/100

VOUT

NC

INV C

VIN

AGND

V+

AGND

COMP1*

INV A

R(h, I)

VIN

VOUT

LTC1064-4

1

2

3

4

5

6

7

14

13

12

11

10

9

8

0.1µF

0.1µF

0.1µF

0.1µF

VOUT

–

+

V–

V+

POWER SOURCE

10k

10k

1064-4 F04

RECOMMENDED OP AMPS:

LT1022, LT318, LT1056

V+/V–

8

4

COMP2*

V–

fCLK

50/100

VOUT

NC

INV C

VIN

AGND

V+

AGND

COMP1*

INV A

R(h, I)

VIN

LTC1064-4

1

2

3

4

5

6

7

14

13

12

11

10

9

8

V+

V+/V–

V–

1064-4 F05

0.1µF

0.1µF

VOUT

–

+

LT1056

200pF

430pF

10k

4.99k

4.99k

50Ω

0.027µF

R(h, I)

COMP2*

V–

fCLK

50/100

VOUT

NC

INV C

VIN

AGND

V+

AGND

COMP1*

INV A

VIN

Figure 1. Using Schottky Diodes to Protect

the IC from Power Supply Spikes

Figure 2. Single Supply Operation. If Fast Power Up or Down

Transients are Expected, Use a 1N5817 Schottky Diode

Between Pin 4 and Pin 5.

LTC1064-4

1

2

3

4

5

6

7

14

13

12

11

10

9

8

V+

V–

1064-4 F01

0.1µF

0.1µF

1N5817

1N5817

V+/V–

COMP2*

V–

fCLK

50/100

VOUT

NC

INV C

VIN

AGND

V+

AGND

COMP1*

INV A

R(h, I)

VIN

VOUT

LTC1064-4

1

2

3

4

5

6

7

14

13

12

11

10

9

8

V+= 15V

1064-4 F02

0.1µF

0.1µF

5k

5k

V+/2

1N5817

0V TO 10V

COMP2*

V–

fCLK

50/100

VOUT

NC

INV C

VIN

AGND

V+

AGND

COMP1*

INV A

R(h, I)

VIN

VOUT

TYPICAL APPLICATIO S