SA1920 Datasheet, PDF (2/36 Pages) NXP Semiconductors – Dual-band RF front-end

Philips Semiconductors
Dual-band RF front-end
Product specification
SA1920
DESCRIPTION
The SA1920 is an integrated dual-band RF front-end that operates
at both cellular (AMPS, GSM and TDMA) and PCS/DCS (TDMA and
GSM) frequencies, and is designed in a 13 GHz f_T BiCMOS
process—QUBiC1. The low-band is a combined low-noise amplifier
(LNA) and mixer. The LNA has a 1.7 dB noise figure at 881 MHz
with 17.5 dB of gain and an IIP3 of –5 dBm. The wide-dynamic
range mixer has a 10 dB noise figure at 881 MHz with 9.5 dB of gain
and an IIP3 of +5 dBm.
The high-band contains a receiver front-end, doubler and a high
frequency transmit mixer intended for closed loop transmitters. One
advantage of the high-band architecture is an image-rejection mixer
with over 30 dB of image rejection; thus, eliminating external filter
cost while saving board space. The system noise figure is 4.2 dB at
1960 MHz with a power gain of 23.5 dB and an IIP3 of –12.5 dB.
PIN CONFIGURATION
FEATURES
• Low current consumption
• Outstanding low- and high-band noise figure
• Excellent gain stability versus temperature and supply
• Image reject high-band mixer with over 30 dB of rejection
• Increased low-band LNA gain compression during analog
transmission
• LO input and output buffers
• Frequency doubler
• On chip logic for network selection and power down
• Very small outline package
APPLICATIONS
• 800 to 1000 MHz analog and digital receivers
• 1800 to 2000 MHz digital receivers
• Portable radios
• Digital mobile communications equipment
24 23 22 21 20 19 18 17 16 15 14 13
VCC ²⁵
Tx ON ²⁶
V _CC ²⁷
HIGH BAND IMAGE SET I 28
GND ²⁹
HIGH BAND LO INPUT ³⁰
LOW BAND LO INPUT ³¹
GND 32
HIGH BAND IMAGE SET Q ³³
GND 34
X2 ON 35
N/C ₃₆
37 38 39 40 41 42 43 44 45 46 47 48
12 N/C
11 GND
10 Tx B
9 Tx A
8 ^GND
7 ^VCC
6 GND
5 MIX IN
4 ^GND
3 ^{Tx IF B}
2 ^{Tx IF A}
1 N/C
ORDERING INFORMATION
TYPE NUMBER
NAME
SA1920
LQFP48
1999 Mar 02
Figure 1. Pin Configuration
SR01435
PACKAGE
DESCRIPTION
Plastic low profile quad flat package; 48 leads; body 7x7x1.4 mm
VERSION
SOT313-2
2
853–2057 20918