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PDF QHX220 Data sheet ( Hoja de datos )
| Número de pieza | QHX220 | |
| Descripción | Active Isolation Enhancer and Interference Canceller | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Active Isolation Enhancer and Interference Canceller
QHx220
Features
Electromagnetic Interference (EMI) is emerging as a
major concern in next generation wireless
communication systems. As wireless terminals now
support multiple services and features that utilize high
data rates simultaneously, removing interference within
wireless terminals like handsets has become a challenge.
Reducing the Electromagnetic Interference recovers
the receiver sensitivity, enabling simultaneous
operation of multiple radios, and improves the overall
quality of service of communication devices. Intersil’s
QHx220 is situated in a handset to sample the source
of the noise and emulate the RF coupling channel
between the noise source and victim receiver antenna.
In doing so, an anti-noise signal can be applied directly
to the victim receive path to cancel the EMI and
achieve the signal integrity benefits. This approach
makes it possible to cancel both in-band (within the
victim Rx band) or out-of-band aggressors. This is a
revolutionary approach since it is only possible to
cancel out of band noise using conventional Rx filters.
In addition QHx220 may be used to increase the
inherent isolation between antennas or inside duplexers
and switches, thus allowing to increase the transmit
power in repeaters or yielding higher sensitivity in the
receivers. Both measures finally resulting in a better
coverage, larger cell size, smaller antennas or lower
power of infrastructure components such as
basestations, pico-and Femtocells as well as repeaters.
The QHx220 integrates the sampler path LNA gain stages
as well as the DACs required to control the I and Q
control voltages (used to set the magnitude and phase of
www.tDhaetacSahneecte4lUla.ctioomn signal). Both the gain, and control
voltages are programmable using a SPI bus interface.
• Protocol agnostic. Designed for: GSM, CDMA, DVB-H,
ISDB-T, DMB
• Frequency Range 300MHz to 3GHz
• Integrated, programmable LNA gain stages in the
sampler path
• SPI bus controlled integrated DACs
• >20dB Noise Cancellation is possible
• 50dB typical Dynamic Range
• Low Power Consumption (<20mW typical, ~2µW
standby)
• Ultra Small ~ 1mm2 devices are available as tested
bumped die or 3x3mm2 QFN package
Applications
• Most any wireless device with a local aggressor:
- Cell phones
- Mobile TV devices
- Laptop Computers
- GPS terminals
- Pico- and Femtocells
• Improved Tx to Rx Isolation of devices (i.e. duplexer,
switches) or between neighboring antennae
• Basestations
• Linearization of PAs
Typical Application Circuit
Benefits
• Actively cancels unwanted local RF noise
• Improves BER, receiver sensitivity, C/N by canceling
noise generated from local aggressors
• Improves isolation between adjacent antennas
• Can be used to cancel in-band or out-of-band
interferers (i.e. spurs, harmonics, phase noise, or
other noise sources like IM products generated in a
PA)
• Enables simultaneous operation of multiple
co-located radios
• Improves overall quality of service
FIGURE 1. ACTIVE ISOLATION ENHANCER AND NOISE
CANCELLER
October 20, 2009
FN6986.0
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
QHx220
SPI Bus Characteristics
CLK
TC2BEB
TCP
TBEB2C
TCH
TCL
BUSENBAR
24BIT
DATA
MSB
LSB
TDH
TDS Data register lock
FIGURE 2. SPI BUS TIMING DIAGRAM
SPI BUS TIMING REQUIREMENT
SYMBOL
PARAMETER
tCP SPI clock period
tCL Clock pulse width low
tCH Clock pulse width high
www.DataSthBeEeBt24CU.com BUSENBAR Fall to CLK Rise Setup Time
tC2BEB
CLK Rise BUSENBAR Fall Delay
tDS Data Setup Time
tDH Data Hold Time
MIN
100ns
40ns
40ns
5ns
40ns
20ns
0ns
10BIT I-DAC
<23:14>
TABLE 1. SPI BUS DATA FORMAT
10BIT Q-DAC
<13:4>
FREQ RANGE
<3:2>
GAIN
<1>
TYP
MAX
SPARE
<0>
5 FN6986.0
October 20, 2009
5 Page 
QHx220
Typical Performance Characteristics (UHF-Band) (Continued)
Plots are exemplary only, to show typical performance and provide a frame of reference. Typical test conditions (TTC)
VDD = 1.8V, TA = +25°C, and PIN < -48dBm, unless otherwise noted. Extreme Characterization Conditions (ECC) are
VDD = 1.7V to 1.9V, TA = -40°C to +85°C.
-155
-157
-159
-161
-163
-165
-167
-169
-171
-173
-175
-177
MTV Noise Plot
-157--155
-159--157
-161--159
-163--161
-165--163
-167--165
-169--167
-171--169
-173--171
-175--173
1.2 -177--175
0.7
Control B (V)
0.0
Control A (V)
FIGURE 11. 3D NOISE FLOOR PLOT FOR GAIN AND
PHASE FAMILY OF CURVES @ 750MHz
11.0
10.5
1.0
SUPPLY CURRENT vs TEMPERATURE AT 770MHz
HG VDD = 1.9V
HG VDD = 1.7V
9.5 HG VDD = 1.8V
9.0
8.5
LG VDD = 1.7V
8.0 LG VDD = 1.9V
7.5
7.0 LG VDD = 1.8V
6.5
6.0
-40 -5 25 55 85
TEMPERATURE (°C)
FIGURE 12. SUPPLY CURRENT VARIATION UNDER ECC
Typical Performance Characteristics (L-Band)
Plots are exemplary only, to show typical performance and provide a frame of reference. Typical test conditions (TTC)
VDD = 1.8V, TA = +25°C, and PIN < -48dBm, unless otherwise noted. Extreme Characterization Conditions (ECC) are
VDD = 1.7V to 1.9V, TA = -40°C to +85°C.
www.DataSheet4U.com
VCTRLb
VCTRLa
FIGURE 13. 3D CONTOUR PLOT FOR GAIN AND PHASE
FAMILY OF CURVES IN HIGH GAIN MODE
FIGURE 14. 2D CONTOUR PLOT FOR GAIN AND PHASE
FAMILY OF CURVES IN HIGH BOOST MODE
(RED CIRCLE = UNITY GAIN)
11 FN6986.0
October 20, 2009
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet QHX220.PDF ] | |
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