HFA3765 Datasheet, PDF (1/6 Pages) Intersil Corporation – AGC and Quadrature IF Demodulator

®
HFA3765
PRELIMINARY
February 1998
AGC and Quadrature IF Demodulator
Features
Description
DescriptionIF Operation10MHz to 250MHz
• I/Q Amplitude and Phase Balance . . 0.5dB, 2 Degrees
• Voltage Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>60dB
• AGC Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90dB
• Output P1dB With 20pF Load . . . . . . . . . . . . . . . 2.5V_PP
• Low LO Drive Level . . . . . . . . . . . . . . . . . . . . . . -10dBm
• Power Enable/Disable Control
• Single Supply Battery Operation . . . . . . . . . 2.7 to 3.3V
The HFA3765 is a monolithic quadra-
ture demodulator and a gain control
amplifier stage with 90dB of dynamic
range for CDMA/AMPS cellular applications. Two amplifier
inputs are provided for interfacing different IF input filters. A
local oscillator input requires low drive levels and a divide by
two phase shifter with duty cycle compensation achieves
excellent phase and amplitude balance properties. The
HFA3765 is one of the four chips in the PRISM™ chip set
and is housed in a 28 lead SSOP package ideally suited to
cellular handset applications.
Ordering Information
Applications
• IS-95A CDMA/AMPS Dual Mode Handsets
• Wideband CDMA Handsets
• Full Duplex Transceivers
• CDMA/TDMA Packet Protocol Radios
TEMP.
PART NUMBER RANGE (^oC) PACKAGE
PKG. NO.
HFA3765IA
-40 to 85 28 Ld SSOP M28.15
HFA3765IA96
-40 to 85 Tape and Reel
Pinout
HFA3765
(SSOP)
TOP VIEW
BYP+ 1
IF_CDMA+ 2
IF_CDMA- 3
GND 4
IF_FM+ 5
IF_FM- 6
BYP- 7
AGC_CTRL 8
SEL 9
RX_PE 10
GND 11
GND_LO 12
V+_LO 13
LO_IN 14
28 V+_AGC
27 IF_OUT+
26 IF_OUT-
25 GND
24 _{GND_AGC}
23 DEMOD-
22 DEMOD+
21 V+_AMP
20 QOUT+
19 QOUT-
18 GND
17 IOUT+
16 IOUT-
15 GND_AMP
PRISM™ and the PRISM™ logo are trademarks of Intersil Corporation.
Simplified Block Diagram
SEL
SW
÷2 0^o/ 90^o
BIAS
NETWORK
AGC_CTRL
LO_IN
RX_PE
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 registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
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File Number 4300.3