ITM2520 Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – Cellular/GPS Image-Reject Receiver RF Front-end IC

Wisdom
Semiconductor Inc.
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ITM2520
Cellular/GPS Image-Reject Receiver RF Front-end IC
Product Description :
The ITM2520 is an optimized LNA/Mixer IC for dual-band tri-mode applications. It provides a receiver front-end for cellular
CDMA/AMPS and GPS functions on a single chip. The LNAs/Mixers for both bands are designed for high gain, high linearity, and
low noise figure with flexible optimization of performance. The device offers an easy control of linearity and current, using one
external resistor, as well as a gain control to minimize intermodulation and cross-modulation due to strong jammers. The image-reject
mixer(IRM) has high image-reject ratio at low current consumption, eliminating external RF SAW filter on GPS signal path. This
feature saves the foot-print space and manufacturing cost simultaneously. The ITM2520 includes an internal LO frequency divider
which allows the use of a single VCO for both bands.
The ITM2520 is fabricated on an advanced SiGe BiCMOS process, and is available in a small 24-pin Leadless Plastic Chip Carrier
(LPCC) package.
Product Features :
•Operating frequency :
•Cellular: 869 ~ 894 MHz
•GPS: 1540 ~ 1600 MHz
•Easily adjustable Gain, NF, and IIP3
•Two step LNA gain control
•GPS image-reject mixer eliminating RF SAW filter
•40dB Gain, 2.2dB NF for GPS signal path
•Internal LO divider for use of single VCO
•On-chip Tx-LO buffer
•Small 24-pin LPCC package : 4.0mm × 4.0mm × 0.9mm
Applications :
•Cellular CDMA/AMPS Mobile Phone
(@ IS-95A/B/C, CDMA2000, CDMA20001X)
•800 MHz CDMA and TDMA Receivers
•GPS Receiver for E911 and Traveler Assistance
•Portable Radio Handset and Equipments
Functional Block Diagram
18
CLNA_IN 19
CLNA_E 20
GLNA_IN ₂₁
17 16 15 14
ITM2520
Bias_control
13
12
11
10
CMIX_IN
FM_IF
CDMA_IFP
GLNA_OUT 22
9 CDMA_IFN
VCC_LNA 23
GMIX_IN 24
8 GPS_IF
/2
7 ^LOD
123456
This document is a general product description and is subject to change without notice for improvement
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