HFA3766 Datasheet, PDF (1/11 Pages) Intersil Corporation – 400MHz AGC Quadrature IF Modulator/Demodulator

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
M
M
÷2 0^o/90^o
U
X
U
X
Q
∑
2V REF
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.
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