U2741B Datasheet, PDF (6/9 Pages) ATMEL Corporation – UHF ASK/FSK TRANSMITTER

Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Min.
Max.
Unit
Supply voltage
Power dissipation
Junction temperature
Storage temperature
Ambient temperature
V_S
6
V
P_tot
250
mW
T_j
150
°C
T_stg
-55
125
°C
T_amb
-40
105
°C
Thermal Resistance
Parameters
Junction ambient
Symbol
R_thJA
Value
180
Unit
K/W
Electrical Characteristics
All parameters are refered to GND (pin 5). The possible operating ranges refer to different circuit conditions:
V_S = 2.0 V to 5.5 V at T_amb = -20°C to +70°C, V_S = 2.2 V to 5.5 V at T_amb = -40°C to +85°C (typically 25°C, 3 V)
Parameters
Test Conditions
Symbol Min.
Typ.
Max.
Supply current (power down)
V_ASK, V_FSK £ 0.3 V, V_S < 3.6 V
Supply current (power up, output OFF) V_ASK = GND, V_FSK = V_S, V_s = 3 V
Supply current (power up, output ON) V_ASK = V_S, V_S = 3 V, R_PWRSET = 1.2 kW
Output power
V_S = 3 V, T_amb = 25°C, f = 433.92 MHz
R_PWRSET = 1.2 kW
R_PWRSET = 1.8 kW
Output power variation for the full
T_amb = -40°C to +85°C, f = 433.92 MHz,
V_S = 3.0 V
V_S = 2.4 V
temperature range
T_amb = -20°C to +85°C, f = 433.92 MHz,
V_S = 2.0 V
P_out = P_Ref + DP_Ref
Output power variation for
f = 315 MHz compared to
f = 315 MHz
f = 433.92 MHz
P_out = P_Ref + DP_Ref
Maximum peak output
antenna voltage
at P_out = 2.0 mW,
the load impedance must be selected to
meet the V_out maximum requirement
the supply current is not dependent on
the load impedance tolerance
IS_off
IS_on
IS_transmit
P_Ref
P_Ref
DP_Ref
DP_Ref
DP_Ref
DP_Ref
V_outmax
0.35
4.7
6.2
10
12.5
1.5
3
5
-0.5
1
3
-1.5
-4.0
-5.5
1.5
V_S - 0.7 V
Spurious emission
at T_amb = 25°C
f_o ±(n ´ f_PC) where f_PC = 6.78 MHz
Load capacitance at CLK £ 3 pF
f = 230 MHz to 470 MHz
Em
-40
f < 230 MHz, f > 470 MHz
Em
-58
Unit
µA
mA
mA
dBm
dBm
dB
dB
dB
dB
V_(peak)
dBC
dBC
6 U2741B
4733A–RKE–11/03