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U3741BM Datasheet, PDF (20/25 Pages) ATMEL Corporation – UHF ASK RECEIVER IC | |||
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U3741BM
Electrical Characteristics (continued)
All parameters refer to GND, Tamb = â40°C to +105°C, VS = 4.5 V to 5.5 V, f0 = 433.92 MHz and f0 = 315 MHz,
unless otherwise specified. (VS = 5 V, Tamb = 25°C)
Parameters
Test Conditions / Pins
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Current consumption
Sleep mode
(XTO and polling logic active)
IC active
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ (startup-, bitcheck-, receiving
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ mode) Pin DATA = H
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ LNA mixer
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Third-order intercept point
LNA/ mixer/ IF amplifier
input matched according to
figure 6
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ LO spurious emission
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ @ RFIn
Input matched according to
figure 6, required according to
IâETS 300220
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Noise figure LNA and mixer Input matching according to
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ (DSB)
figure 6
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ LNA_IN input impedance
@ 433.92 MHz
@ 315 MHz
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 1 dB compression point
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ (LNA, mixer, IF amplifier)
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Maximum input level
Input matched according to
figure 6, referred to RFin
Input matched according to
figure 6, BER ⤠10â3,
FSK mode
ASK mode
Local oscillator
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Operating frequency range
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ VCO
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Phase noise VCO / LO
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Spurious of the VCO
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ VCO gain
fosc = 432.92 MHz
@ 1 MHz
@ 10 MHz
@ ± fXTO
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Loop bandwidth of the PLL
For best LO noise
W (design parameter)
R1 = 820
C9 = 4.7 nF
C10 = 1 nF
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Capacitive load at Pin LF
The capccitive load at Pin LF is
limited if bitcheck is used. The
limitation therefore also applies
to self polling.
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ XTO operating frequency
XTO crystal frequency,
appropriate load capacitance
must be connected to XTAL
6.764375 MHz
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ 4.90625 MHz
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Series resonance resistor of
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ the crystal
Static capacitance of the
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ crystal
fXTO = 6.764 MHz
4.906 MHz
Symbol
ISoff
ISon
IIP3
ISLORF
NF
ZiLNA_IN
IP1db
Pin_max
fVCO
L (fm)
KVCO
BLoop
CLF_tot
fXTO
RS
C0
Min.
299
6.764375
â30 ppm
4.90625
â30 ppm
Typ.
190
7.0
â28
â73
7
1.0 || 1.56
1.3 || 1.0
â40
â93
â113
â55
190
100
6.764375
4.90625
Max.
Unit
276
µA
8.6
mA
dBm
â57
dBm
dB
k⦠|| pF
k⦠|| pF
dBm
â28
dBm
â20
dBm
449
MHz
â90 dBC/Hz
â110 dBC/Hz
â47
dBC
MHz/V
kHz
10
nF
6.764375
+30 ppm
4.90625
+30 ppm
150
220
4
MHz
MHz
WW
pF
20 (25)
Preliminary Information
Rev. A1, 15-Oct-98
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