TQ3631 Datasheet, PDF (1/10 Pages) TriQuint Semiconductor – 3V PCS Band CDMA LNA IC

WIRELESS COMMUNICATIONS DIVISION
Control
Logic ^C2
GND
C2
L1
VDD
GND
TQ3631
DATA SHEET
3V PCS Band CDMA
LNA IC
RF
RF 50 ohm
IN
OUT RF Out
LNA
gnd
C3
Control
Logic
Product Description
The TQ3631 is a 3V, RF LNA IC designed specifically for PCS band CDMA
applications. It’s RF performance meets the requirements of products designed to
the IS-95 specifications. The TQ3631 is designed to be used with the TQ5631
(CDMA mixer) which provides a complete CDMA receiver for 1900MHz phones.
The LNA incorporates on-chip switches which determine high, low and bypass mode
select. When used with the TQ5631 (CDMA RFA/mixer), four gain steps are
available for use which provide low current/high IP3 and gain. The RF output port is
internally matched to 50 Ω, greatly simplifying the design and minimizing the number
of external components. The TQ3631 achieves excellent RF performance with low
current consumption, supporting long standby and talk times in portable applications.
Coupled with the very small SOT23-8 package, the part is ideally suited for PCS
band mobile phones.
Electrical Specifications¹
Features
Small size: SOT23-8
Single 3V operation
Low-current operation
Gain Select
High IP3 performance
Few external components
Applications
IS-95 CDMA PCS Mobile Phones
Parameter
Frequency
Min
Typ
Max
Units
1960
MHz
Gain
13.0
dB
Noise Figure
1.5
dB
Input 3^rd Order Intercept
10.0
dBm
DC supply Current
11.0
mA
Note 1: Test Conditions: Vdd=2.8V, RF=1960MHz, Tc=25C, CDMA High Gain state.
For additional information and latest specifications, see our website: www.triquint.com
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