TAT8857

CATV Doubler

– Hybrid RFIC

Data Sheet: Rev C 06-05-12

- 1 of 8 -

Disclaimer: Subject to change without notice

© 2012 TriQuint Semiconductor, Inc.

Connecting the Digital World to the Global Network

®

Applications

SOIC-16 Wide Package



CATV Line Amplifiers



CATV System Amplifiers



Distribution Nodes



Green Applications

Product Features

Functional Block Diagram



75 Ω, 40 – 1000 MHz Bandwidth



GaAs pHEMT & MESFET Technology



21 – 27 dB configurable gain



Integrated linearization



Flexible bias voltage and current for optimum

efficiency



SOIC-16 Wide Package

General Description

Pin Configuration

The TAT8857 is a cost effective 75 Ω RFIC Amplifier

designed for use in Doubler CATV applications up to 1000

MHz.

It works with readily available SMT baluns and

transformers to provide a highly flexible low cost

replacement for traditional hybrids.

Gain of the TAT8857 may be easily adjusted by varying

external components, allowing for a family of Doubler

solutions to be developed from a single RFIC.

The TAT8857 provides integrated linearization to improve

the 3

The TAT8857 may be protected against transient surges

with the TQP200002 and an output high pass filter

network. Consult TriQuint for discussion.

The TAT8857 supports traditional 24 V and 12 V supply

voltages. Bias current may be adjusted to suit particular

requirements with standard or active biasing approaches.

Consult TriQuint for further discussion.

Pin #

Symbol

Pin #

Symbol

1

OUT 1A

10

IN 2B

2

LIN ADJ A

11

OUT 2B

3

IN 1A

12

GATE B

4

BIAS 1A

13

GATE A

5

BIAS 1B

14

OUT 2A

6

IN 1B

15

IN 2A

7

LIN ADJ B

16

BIAS 2A

8

OUT 1B

17

GND

9

BIAS 2B

Ordering Information

Part No.

Description

TAT8857

RFIC

TAT8857-EB

evaluation board

Standard T/R size = 1000 pieces on a 7” reel.