U3745BM Datasheet, PDF (23/29 Pages) ATMEL Corporation – UHF ASK RECEIVER IC

U3745BM
Absolute Maximum Ratings
Parameters
Supply voltage
Power dissipation
Junction temperature
Storage temperature
Ambient temperature
Maximum input level, input matched to 50 W
Symbol
V_S
P_tot
T_j
T_stg
T_amb
P_{in_max}
Min.
-55
-40
Max.
6
450
150
+125
+85
10
Unit
V
mW
°C
°C
°C
dBm
Thermal Resistance
Parameters
Junction ambient
Symbol
R_thJA
Value
100
Unit
K/W
Electrical Characteristics
All parameters refer to GND, V_S = 5 V, T_amb = 25°C, f₀ = 433.92 MHz and f₀ = 315 MHz, unless otherwise specified. The
possible operating range refer to different circuit conditions: V_S = 4.5 V to 5.5 V, T_amb = -40°C to +85°C
Parameters
Test Conditions
Symbol
Min.
Typ.
Max. Unit
Current consumption
Sleep mode
(XTO and polling logic active)
IS_off
IC active
(startup-, bit check-, receiving mode)
IS_on
Pin DATA = H
190
350
µA
7.0
8.6
mA
LNA Mixer
Third-order intercept point
LNA/mixer/IF amplifier
input matched according to Figure 4
IIP3
-28
dBm
LO spurious emission at RF_In
Input matched according to Figure 4,
required according to I-ETS 300220
IS_LORF
-73
-57
dBm
Noise figure LNA and mixer (DSB) Input matching according to Figure 4
NF
7
dB
LNA_IN input impedance
at 433.92 MHz
at 315 MHz
Zi_{LNA_IN}
1.0 || 1.56
1.3 || 1.0
kW || pF
kW || pF
1 dB compression point (LNA, mixer,
IF amplifier)
Maximum input level
Input matched according to Figure 4,
referred to RF_in
Input matched according to Figure 4,
BER £ 10^-3,
ASK mode
IP_1db
P_{in_max}
-40
dBm
-23
dBm
Local Oscillator
Operating frequency range VCO
Loop bandwidth of the PLL
For best LO noise
(design parameter)
R1 = 820 W
C9 = 4.7 nF
C10 = 1 nF
f_VCO
B_Loop
309
439
MHz
100
kHz
Capacitive load at Pin LF
The capacitive load at pin LF is limited
if bit check is used. The limitation
therefore also applies to self polling.
C_{LF_tot}
10
nF
23
4663A–RKE–06/03