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PDF HFA3683A Data sheet ( Hoja de datos )
| Número de pieza | HFA3683A | |
| Descripción | 2.4GHz RF/IF Converter and Synthesizer | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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TM
Data Sheet
HFA3683A
June 2000 File Number 4634.5
2.4GHz RF/IF Converter and Synthesizer
The HFA3683A is a monolithic SiGe
half-duplex RF/IF transceiver designed
to operate in the 2.4GHz ISM band.
The receive chain features a low noise,
gain selectable amplifier (LNA) followed
by a down-converter mixer. An up-converter mixer and a
high performance preamplifier compose the transmit chain.
The remaining circuitry comprises a high frequency Phase
Locked Loop (PLL) synthesizer with a three wire
programmable interface for local oscillator applications.
A reduced filter count is realized by multiplexing the receive
and transmit IF paths and by sharing a common differential
matching network. Furthermore, both transmit and receive
RF amplifiers can be directly connected to mixers. The
inherent image rejection of both the transmit and receive
functions allow this economic advantage.
The HFA3683A is housed in a 64 lead TQFP package well
suited for PCMCIA board applications.
Ordering Information
PART
NUMBER
HFA3683AIN
HFA3683AIN96
TEMP. RANGE
(oC) PACKAGE PKG. NO.
-40 to 85 64 Ld TQFP Q64.10x10
-40 to 85 Tape and Reel
Simplified Block Diagram
RX_IN
CP_DO
INTERFACE
REF_IN
TXA_OUT
PLL
MODULE
RX_MX_OUT
LO_IN
TX_MX_IN
Features
• Highly Integrated
• Multiplexed RX/TX IF Path Utilizes Single IF Filter
• Programmable Synthesizer
• Gain Selectable LNA
• Power Management/Standby Mode
• Single Supply 2.7V to 3.3V Operation
Cascaded LNA/Mixer (High Gain)
• Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25dB
• SSB Noise Figure. . . . . . . . . . . . . . . . . . . . . . . . . . . 3.7dB
• Input IP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -13dBm
• IF Frequency . . . . . . . . . . . . . . . . . . . 280MHz to 600MHz
Cascaded LNA/Mixer (Low Gain)
• Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5dB
• Input P1dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5dBm
• IF Frequency . . . . . . . . . . . . . . . . . . . 280MHz to 600MHz
Cascaded Mixer/Preamplifier
• Transmit Cascaded Mixer/Preamplifier Gain . . . . . . .25dB
• SSB Noise Figure. . . . . . . . . . . . . . . . . . . . . . . . . . . .10dB
• Output P1dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4dBm
• IF Frequency . . . . . . . . . . . . . . . . . . . 280MHz to 600MHz
Applications
• IEEE802.11 1MBPS and 2MBPS Standard
• Systems Targeting IEEE802.11, 11MBPS Standard
• Wireless Local Area Networks
• PCMCIA Wireless Transceivers
• ISM Systems
• TDMA Packet Protocol Radios
2-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000
PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.
1 page  
HFA3683A
Cascaded LNA/Mixer AC Electrical Specifications Assumes a direct connection between the LNA and Mixer, IF = 374MHz,
LO = 2075MHz at -6dBm, VCC = 2.7 Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
TEMP.
(oC)
MIN
TYP
MAX
UNITS
Power/Voltage Gain
Low Gain Mode
Full -9 -5 -1 dB
Noise Figure
25 - 25 - dB
Output IM3 at -4dBm Input Tones
Full -42 -40.5 -40 dBc
Input P1dB
Full -1 +2.5 - dBm
LNA Input 50Ω VSWR
High Gain Mode
25 1.28 1.65:1 2.0:1
-
Low Gain Mode
25
1.1:1
1.3:1
2.0:1
-
LO 50Ω VSWR
LO = Single End
25
1.4:1
1.4:1
2.0:1
-
Differential IF Output Load
Shared with TX
25 - 200 - Ω
IF Output Capacitance (Single Ended)
25 - 1.2 - pF
IF Output Resistance (Single Ended)
25 - 5.5 - kΩ
LO to Mixer RF Feedthrough (Uncascaded)
25 - -50 -20 dBm
LO to LNA Input Feedthrough (Cascaded, no filter)
25 -69 -60 -50 dBm
Gain Switching Speed at Full Scale - High to Low
±1dB settling
Full
-
0.03 0.1
µs
Gain Switching Speed at Full Scale - Low to High
±1dB settling
Full
-
0.25 0.3
µs
Image Rejection
With Matching Network
25 - 14 - dB
Cascaded Transmit Mixer AC Electrical Specifications Assumes a direct connection between the Mixer and Preamplifier,
F = 374MHz, LO = 2075MHz at -6dBm, VCC = 2.7 Unless Otherwise
Specified.
PARAMETER
TEMP.
TEST CONDITIONS
(oC)
MIN
TYP
MAX
UNITS
RF Frequency Range
Full 2400
-
2500
MHz
IF Frequency Range
Full 280 374 600 MHz
LO Frequency Range
Full 1800
-
2220
MHz
Power Conversion Gain
200Ω In, 50Ω Out
Full
21
25
29
dB
SSB Noise Figure
Full -
10 15 dB
Output IP3
Full +12 +14 +20 dBm
Output P1dB
Full +2 +4 +9 dBm
LO Input Drive Level
Same as RX
Full -10
-6
0 dBm
LO to Transmit Mixer RF Feedthrough (Uncascaded)
25 - -37 -20 dBm
LO to Transmit Amp. Output Feedthrough
(Uncascaded)
25 - -45 -30 dBm
LO to Transmit Amp. Output Feedthrough
(Cascaded, no filter)
25 - -15 -5 dBm
Preamplifier Output 50Ω VSWR
25
-
2.3:1
3.0:1
-
LO 50Ω VSWR
LO = Single End
25
-
1.4:1
2.0:1
-
Differential IF Input Load
Shared with RX
25 - 200 -
Ω
IF Input Capacitance (Single Ended)
25 - 1.1 - pF
IF Input Resistance (Single Ended)
25 - 0.7 - kΩ
2-5
5 Page 
HFA3683A
Typical Evaluation Board Application (Continued)
C27 R36
3.3pF 0
IF_IN/OUT
T1
C31 3.3pF R9 0
C37 220pF
TX_MIX_OUT
C63
C34
0.01µF
4.7µF
(NO FIT)
C52
U4
4 OUT
IN
C51
4.7µF
MAX8867
SHDN
GND BP
2
0.1µF
3
C49
1 0.1µF
5
C50
0.01µF
C48
4.7µF
VCC_IN
D1 GP5
C58
VCC2
C46 C47
0.1µF
10pF
U3 UPC2745TB
C55
10pF
2 35
4
6
1
C56 10pF
1000pF
U2
ENFVZ5F81
2
VCC
RF 1
3 VCONT
GROUND
4 5A 5B 5C 5D
R33
82
R34
91
R35
82
VCC2
EXT_VCO
R17
560
R19
56
C43
2700pF
R20
C44 3.48K
0.027µF
C45
R21
1.74K
300pF
FILTER VALUES
BW 1KHz
C43 0.068µF
C44 0.68µF
R20 1.5K
R21 649
C45 0.01µF
(10KHz
DEFAULT)
10kHz
2700pF
0.027µF
3.48K
1.74K
330pF
VCC2
C62
4.7µF
C61
0.1µF
U5
4
OUT
3
IN
MAX8867 1
SHDN 5
BP
GND
2
C60
C57
0.01µF
0.1µF
C59
4.7µF
2-11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet HFA3683A.PDF ] | |
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