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PDF RF3321PCBA Data sheet ( Hoja de datos )
| Número de pieza | RF3321PCBA | |
| Descripción | REVERSE PATH HIGH OUTPUT POWER PROGRAMMABLE GAIN AMPLIFIER | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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Preliminary
2
Typical Applications
• Euro-DOCSIS/DOCSIS Cable Modems
• CATV Set-Top Boxes
• Telephony Over Cable
RF3321
REVERSE PATH HIGH OUTPUT POWER
PROGRAMMABLE GAIN AMPLIFIER
• Home Networks
• Automotive/Mobile Multimedia
• Coaxial and Twisted Pair Line Driver
3
Product Description
The RF3321 is a variable gain amplifier for use in CATV
3.90
+ 0.10
reverse path (upstream) applications. It is designed to be
DOCSIS-compliant for use in cable modems. The gain
control covers a 56dB range and is serially programma-
4.90
+ 0.20
ble via three-wire digital bus for compatibility with stan-
dard baseband chipsets. Amplifier shutdown and transmit
disable modes are hardware-controlled. The device oper-
ates over the frequency band of 5MHz to 65MHz for use
6.00
+ 0.20
in current U.S. and European systems. The amplifier
delivers up to +69dBmV at the output of the balun. Gain
8° MAX
0° MIN
is controllable in accurate 1dB steps. The device is pro-
vided in a thermally enhanced, exposed die flag package.
0.60
+ 0.15
0.25
+ 0.05
0.65
1.40
+ 0.10
-A- 0.05
+ 0.05
Note 3
NOTES:
1. Shaded lead is pin 1.
2. Lead coplanarity - 0.10 with
respect to datum "A".
3. Lead standoff is specified from
the lowest point on the package
underside.
EXPOSED DIE
FLAG
3.302
0.24
0.20
2.286
Optimum Technology Matching® Applied
Si BJT
üSi Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
SHDNB 1
TX EN 2
NC 3
VIN 4
VINB 5
VCC1 6
VCC1 7
RAMP 8
Power
Control
Gain Control
and Serial Bus
16 GND
15 NC
14 NC
13 VOUT
12 VOUTB
11 SDA
10 CS
9 SCLK
Functional Block Diagram
Package Style: SSOP16 EDF Slug
Features
• Differential Input and Output
• 31dB Maximum Voltage Gain
• -25dB Minimum Voltage Gain
• 5MHz to 65MHz Operation
• Sophisticated Power Management
• DOCSIS 1.1 RF Compliant
Ordering Information
RF3321
RF3321 PCBA
Reverse Path High Output Power Programmable
Gain Amplifier
Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev A10 010516
2-1
1 page  
Preliminary
Table 1. Serial Interface Control Word Format
Bit Mnemonic
Description
MSB 6
5
4
3
2
1
LSB 0
D6 Sleep Mode (Software Shutdown)
D5 Gain Control, Bit MSB
D4 Gain Control, Bit 4
D3 Gain Control, Bit 3
D2 Gain Control, Bit 2
D1 Gain Control, Bit 1
D0 Gain Control, Bit LSB
Serial Bus Timing Diagram
TES
TDATAH,TDATAL
TDS TDH
CS
RF3321
TWH
TC
TEH
3
SCLK
SDA
(Data)
D0
D1 D2
D3 D4
D5
D6
Table 2. Timing Data
Parameter
SCLK Pulsewidth
SCLK Period
Setup Time, SDA versus S CLK
Setup Time, CS versus S CLK
Hold Time, SDA versus S CLK
Hold Time, CS versus S CLK
SCLK Pulsewidth, High
SCLK Pulsewidth, Low
Table 3. Programming State
Enter Sleep Mode
Exit Sleep Mode
Enter Shutdown
Exit Shutdown
TX Enable
TX Disable
Rev A10 010516
Symbol
TWH
TC
TDS
TES
TDH
TEH
TDATAH
TDATAL
Min
50
100
10
10
20
20
50
50
Typ
Max
Units
ns
ns
ns
ns
ns
ns
ns
ns
TX SHDND MSB6
XHL
H=High Voltage Logic
X H H*
L=Low Voltage Logic
XLX
X=Don’t Care
X H H* *Gain Control Data Must be Re-Sent
HXX
LXX
2-5
5 Page 
Preliminary
-1 dB Compression Point
at Gain Control Word = 56
72.0
Gain Control Word = 56
Trend
70.0
68.0
66.0
64.0
62.0
60.0
33.0 35.0 37.0 39.0 41.0 43.0 45.0
Power In (dBmV)
RF3321
-1 dB Compression Point
at Gain Control Word = 29
44.0
Gain Control Word = 29
43.0 Trend
42.0
41.0
40.0
39.0
38.0
37.0
36.0
35.0
38.0 39.0 40.0 41.0 42.0 43.0 44.0 45.0 46.0 47.0
Power In (dBmV)
3
Rev A10 010516
2-11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RF3321PCBA.PDF ] | |
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