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PDF HFA3766IN Data sheet ( Hoja de datos )
| Número de pieza | HFA3766IN | |
| Descripción | 400MHz AGC Quadrature IF Modulator/Demodulator | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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PRELIMINARY
HFA3766
January 1999
File Number 4328.1
400MHz AGC Quadrature IF
Modulator/Demodulator
™ The HFA3766 is a highly integrated
baseband converter for quadrature
modulation applications. It features all
the necessary blocks for baseband
modulation and demodulation of I and
Q signals. It has a two stage integrated AGC IF amplifier with
82dB of voltage gain and 76dB of gain control range.
Baseband antialiasing is integrated into the design. Four
filter bandwidths are programmable via a two bit digital
control interface. In addition, these filters are continuously
tunable over a ±20% frequency range via one external
resistor. For baseband modulation digital I and Q data are
delivered to the transmit section. To achieve broadband
operation, the Local Oscillator frequency input is required
to be twice the desired frequency of modulation and
demodulation. A selectable buffered divide by 2 LO output
and a stable reference voltage are provided for convenience
of the user. The device is housed in a thin 80 lead TQFP
package well suited for PCMCIA board applications.
Simplified
Features
• Integrates all IF Transmit and AGC Receive Functions
• Broad Frequency Range . . . . . . . . . . 10MHz to 400MHz
• I/Q Amplitude and Phase Balance . . . . 0.2dB, 2 Degrees
• 5th Order Programmable
Low Pass Filter . . . . . . . . . . . . . . . . . . 2.2MHz to 17.6MHz
• 400MHz AGC Gain Strip . . . . . . . . . . . . . . . . . . . . . 82dB
• AGC Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75dB
• Low LO Drive Level . . . . . . . . . . . . . . . . . . . . . . . -15dBm
• Fast AGC Switching . . . . . . . . . . . . . . . . . . . . . . . . . . 1µs
• Fast Transmit-Receive Switching . . . . . . . . . . . . . . . . . . . 1µs
• Power Management/Standby Mode
• Single Supply 3.0V Operation
• Wireless Local Loop
• Wireless Local Area Networks
• PCMCIA Wireless Transceivers
• ISM Systems
• CDMA Radios
• PCS/Wireless PBX
Ordering Information
PART NUMBER
HFA3766IN
HFA3766IN96
TEMP.
RANGE (oC) PACKAGE
-40 to 85 80 Ld TQFP
-40 to 85 Tape and Reel
PKG. NO.
Q80.14x14
AGC_SEl
AGC1_IN
AGC1_VAGC
AGC2_VAGC
LO_IN
LO_OUT
LO_GND
MOD_TX_IF_OUT
I
MM
÷2 0o/90o
U
X
U
X
∑
2V REF
Q
LPF_RXI_OUT
LPF_RXQ _OUT
LPF_TXI_IN
LPF_TXQ_IN
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
PRISM and PRISM logo are trademarks of Intersil Corporation.
www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
1 page  
HFA3766
Pin Descriptions (Continued)
PIN SYMBOL
DESCRIPTION
28 LPF_RXQ+ Low pass filter non inverting input of the receive quadrature channel. AC coupling is required. This input is
normally coupled to the positive output of the quadrature demodulator (Mod_RXQ+), pin 35.
29 LPF_RXI- Low pass filter inverting input of the receive in phase channel. AC coupling is required. This input is normally
coupled to the negative output of the in phase demodulator (Mod_RXI-), pin 34.
30 LPF_RXI+ Low pass filter non inverting input of the receive in phase channel. AC coupling is required. This input is normally
coupled to the positive output of the in phase demodulator (DEMOD_RXI-), pin 33.
31, 32
GND
Ground. Connect to a solid ground plane.
33 DEMOD_RXI+ In phase demodulator positive output. AC coupling is required. Normally connects to the non inverting input of
the Low pass filter (LPF_RXI+), pin 30.
34 DEMOD_RXI- In phase demodulator negative output. AC coupling is required. Normally connects to the inverting input of the
Low pass filter (LPF_RXI-), pin 29.
35 DEMOD_RXQ+ Quadrature demodulator positive output. AC coupling is required. Normally connects to the non inverting input
of the Low pass filter (LPF_RXQ+), pin 28.
36 DEMOD_RXQ- Quadrature demodulator negative output. AC coupling is required. Normally connects to the inverting input of
the Low pass filter (LPF_RXQ+), pin 27.
37 MOD_TXI+ In phase modulator non inverting input. AC coupling is required. This input is normally coupled to the Low pass
filter positive output (LPF_TXI+), pin 26.
38 MOD_TXI- In phase modulator inverting input. AC coupling is required. This input is normally coupled to the Low pass filter
negative output (LPF_TXI-), pin 25.
39 MOD_TXQ+ Quadrature modulator non inverting input. AC coupling is required. This input is normally coupled to the Low
pass filter positive output (LPF_TXQ+), pin 24.
40 MOD_TXQ- Quadrature modulator inverting input. AC coupling is required. This input is normally coupled to the Low pass
filter negative output (LPF_TXQ-), pin 23.
41 MOD_TX_PE Digital input control to enable the Modulator section. Enable logic level is High for transmit.
42 MOD_TX_IF Modulator open collector output, single ended. Termination resistor to VCC with a typical value of 316Ω.
_OUT
43 DEMOD_RX Digital input control to enable the demodulator section. Enable logic level is High.
_PE
44
LO_In
Single ended local oscillator current input. Frequency of input signal must be twice the required demodulator LO
(2XLO)
frequency. Input current is optimum at 200µARMS. Input matching networks and filters can be designed for a
wide range of power and impedances at this port. Typical input impedance is 130Ω. This pin requires AC
coupling.
NOTE: High second harmonic content input waveforms may degrade I/Q phase accuracy.
45 MOD_VCC Supply pin for the Demodulator. Use high quality decoupling capacitors right at the pin.
46
LO_Out
Divide by 2 buffered output reference from “DEMOD_LO_in” input. Used for external applications where the de-
modulating carrier reference frequency is required. 50Ω single end driving capability. This output can be disabled
by use of pin 50. AC coupling is required.
47 MOD_VCC Supply pin for the Demodulator. Use high quality decoupling capacitors right at the pin.
48 DEMOD_IFIN+ Demodulator, non-inverting input. Requires AC coupling.
49 DEMOD_IFIN- Demodulator, inverting input. Requires AC coupling.
50
LO_GND
When grounded, this pin enables the LO buffer (DEMOD_LO_Out). When open (NC) it disables the LO buffer.
51, 52, 53
GND
Ground. Connect to a solid ground plane.
54 AGC2_VCC Supply pin for the AGC amplifier 2. Use high quality decoupling capacitors right at the pin.
5
5 Page 
HFA3766
TABLE 1. LOW PASS FILTER PROGRAMING AND TUNING INFORMATION
MODE
BW0
LPF SEL1
0
LPF SEL0
0
f3dB
(NOMINAL RTUNE)
2.2MHz
BW1
0
1
4.4MHz
BW2
1
0
8.8MHz
BW3
1
1 17.6MHz
fTUNED3dB = -f--3----d----B----N----R-O---T--M---U---I-N-N----E-A----L----∗----7---8---7--
+20%
-20%
-30 -25 -20 -15 -10 -5 0 +5 +10 +15 +20 +25 +30
[(787 - RTUNE)/RTUNE] * 100%
FREQUENCY
20% Low
Nominal
20% High
RTUNE
984Ω
787Ω
656Ω
FIGURE 1. TYPICAL f3dB vs RTUNE
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
Sales Office Headquarters
NORTH AMERICA
Intersil Corporation
P. O. Box 883, Mail Stop 53-204
Melbourne, FL 32902
TEL: (407) 724-7000
FAX: (407) 724-7240
EUROPE
Intersil SA
Mercure Center
100, Rue de la Fusee
1130 Brussels, Belgium
TEL: (32) 2.724.2111
FAX: (32) 2.724.22.05
ASIA
Intersil (Taiwan) Ltd.
7F-6, No. 101 Fu Hsing North Road
Taipei, Taiwan
Republic of China
TEL: (886) 2 2716 9310
FAX: (886) 2 2715 3029
11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet HFA3766IN.PDF ] | |
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