CHR2244
RoHS COMPLIANT
5.8 GHz One Antenna Reflective Transponder for Tag
GaAs Monolithic Microwave IC
Description
The CHR2244 is a MMIC transponder dedicated to
short range communications at 5.8GHz. It includes all
the RF functions for bi-directional transmission and
CMOS compatible interfaces. Only one antenna is
necessary.
Three modes are implemented :
STANDBY
: ultra low current AM detector, with a
reduced bandwidth, providing a wake-up signal on
SB_out output. This signal is a DC voltage. This
output is active when and only when an AM
modulated RF signal is applied to the RF input.
DOWNLINK
: low current AM detector, with
optimized IF bandwidth, providing the demodulated
data at the CMOS compatible DATA_out output.
UPLINK
: multiplier based on a passive reflective
mixer.
This circuit is manufactured on a MESFET process. It
is supplied in plastic package (QFN-24).
T/R
MOD WK_in
RF
Det
DATA_out
SB_out
External components
Vcc
Transponder block diagram
Main Features
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5.8GHz ISM band operating frequency
CMOS compatible
Ultra low Standby current
Integrated wake-up circuit
High detection sensitivity for Downlink
Reflective multiplier for Uplink
Single bias voltage
Low cost & high performances plastic package
Lead-free, Matt Tin (Green) solder plating
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Main Characteristics
Tamb = +25°C; Vcc = 3.1V
Symbol
Vcc_sb_i
RF_sb_p
RF_dl_p
BW_dl
G_ul
BW_ul
Parameter
Standby DC current ( Without RF input
signal)
Minimum power for Standby mode
Minimum power for Downlink mode
AM demodulation frequency (Downlink)
Uplink multiplier gain (DSB)
Uplink IF multiplier frequency band
-39
-39
250
-6.5
0.1
-4
10
Min
Typ
8
-43
-43
500
Max
14
Unit
µA
dBm
dBm
kHz
dB
MHz
ESD Protections : Electrostatic discharge sensitive device observe handling precautions !
Ref. : DSCHR2244QDG5053 - 22 Feb 05
1/16
Specifications subject to change without notice
united monolithic semiconductors S.A.S.
Route Départementale 128 - B.P.46 - 91401 Orsay Cedex France
Tel. : +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
UMS [ UNITED MONOLITHIC SEMICONDUCTORS ]
