TAT8857A1H-PCB24V Просмотр технического описания (PDF) - TriQuint Semiconductor
Номер в каталоге
Компоненты Описание
производитель
TAT8857A1H-PCB24V Datasheet PDF : 12 Pages
| |||
TAT8857A1H
CATV Doubler – Hybrid RFIC
Detailed Device Description
The TAT8857A1H is similar to other parts offered on the market; it contains two separate amplifiers. A major difference
is the TAT8857A1H allows much flexibility to set gain and bias to cover multiple applications without an additional
stage. This makes it ideal for green designs. It uses a cost effective high voltage MESFET technology (designed for
CATV) and a pHEMT process (developed for high-volume applications). On-chip linearization is also utilized.
Bias Current Adjustment
R7 180 L9 82nH C9 82pF
Bias current is determined by 2 settings:
1. Size of DC feedback resistors -
decreasing R1 & R2 will increase IDD
2. Tail resistors - decreasing R21 will
increase IDD, but lead to wider
variations
Active biasing schemes are possible but not
necessary for most applications.
Best performance is with IDD = 350mA
R3
C7 .01uF
390
R1 27k
R9 100 C11 0.01u
L5
15nH
C27 0.7pF
1
R5 8.09k2
R21 5.1
5.1
3
L7 600
4
1
2
5
1
2
L8 600 6
LIN ADJ A
16
BIAS 2A
UPPER A
15
14
LOWER A
BIAS 1A
U1
13
GATE A
TAT888587D 57F3
12
BIAS 1B
GATE B
LOWER B
11
C13
L1
47
R11
R12
L6
15nH
R4
390
R6 8.09k 7
8
LIN ADJ B
10
UPPER B
9
BIAS 2B
C28 0.7pF
R2 27k
L1
47
R10 100 C12 0.01u
C8 .01uF
C14
Voltage Biasing: 24V and 12V
R8 180 L10 82nH C10 82pF
The TAT8857A1H has two amplifiers which can be configured to split a 24 V supply (and share the same current) or
both amplifiers can be biased from a 12V supply and draw current independently.
24 V Biasing (Bias Recycling)
+24 V
12 V Biasing
+12 V
RF
Input
PreAmp
Data Sheet: Rev. B 06/30/13
© 2013 TriQuint
RF
Output
RF
Input
RF
Output
PostAmp
- 9 of 12 -
PreAmp
PostAmp
Disclaimer: Subject to change without notice
www.triquint.com
Share Link: 