TAT8857

CATV Doubler

– Hybrid RFIC

Data Sheet: Rev C 06-05-12

- 6 of 8 -

Disclaimer: Subject to change without notice

© 2012 TriQuint Semiconductor, Inc.

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put on Vgate; this prevents a turn-on over-voltage condition from damaging the output FET.

2 to 1

BALUN

IN

GND

OUT1

OUT2

PRI

SEC

1

2

3

4

1

2

1

2

1

2

LOWER B

LOWER A

8857D

UPPER B

UPPER A

BIAS 1A

BIAS 1B

LIN ADJ A

LIN ADJ B

BIAS 2A

BIAS 2B

GATE A

GATE B

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

2

3

1

2

3

4

U1

TAT8857F3

L7

600

L8

600

R11 18

R12 18

L19 600

R5 8.09k

R6

8.09k

L11

470nH

C13 0.01uF

R20

33

C15

2.2pF

L13

27nH

R13

1.3k

L17

8.2nH

R9

100

C11 0.01u

R7

180

L9

82nH

C9

82pF

C7

.01uF

C5

1.8pF

C3

.01uF

R1

27k

L12

470nH

C14 0.01uF

R21

33

L16

9nH

C16

2.2pF

L14

27nH

R14

1.3k

L18

8.2nH

R10 100

C12 0.01u

R8

180

L10 82nH

C10 82pF

C8

.01uF

C6

1.8pF

C4

.01uF

R2

27k

.01uF

C2

C22

.01uF

+24v

C24

.033uF

C25

.033uF

L20 910nH

R19

2K

R18

2.7K

Vgate

Vgate

Vbias

Vbias

T1

MABACT0051

T2

MABA-007681

GND

J1

C28

0.7pF

C27

0.7pF

5.1

R21

R3

390

L5

15nH

R4

390

L6

15nH

-CT2010

RF

IN

RF

OUT

L15

9nH

43

43

0.5pF

0.5pF

3.9nH

C17

C18

R15

R16

L30

5.1

Additional information can be requested from TriQuint Applications Engineering, sjcapplications.engineering@tqs.com.

Voltage divider should be done with same or

lower resistor values to prevent gate leakage

currents in the output FET from affecting