Rainbow Electronics U2741B - Manual (Page 6)

6
U2741B
4733A–RKE–11/03
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 V
S
6 V
Power dissipation P
tot
250 mW
Junction temperature T
j
150
°
C
Storage temperature T
stg
-55 125
°
C
Ambient temperature T
amb
-40 105
°
C
Thermal Resistance
Parameters Symbol Value Unit
Junction ambient R
thJA
180 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. Unit
Supply current (power down) V
ASK
, V
FSK
£ 0.3 V, V
S
< 3.6 V IS
off
0.35 µA
Supply current (power up, output OFF) V
ASK
= GND, V
FSK
= V
S
, V
s
= 3 V IS
on
4.7 6.2 mA
Supply current (power up, output ON) V
ASK
= V
S
, V
S
= 3 V, R
PWRSET
= 1.2 k W IS
transmit
10 12.5 mA
Output power
V
S
= 3 V, T
amb
= 25 ° C, f = 433.92 MHz
R
PWRSET
= 1.2 k W
R
PWRSET
= 1.8 k
W
P
Ref
P
Ref
1.5
-0.5
3
1 5
3 dBm
dBm
Output power variation for the full
temperature range
T
amb
= -40
°
C to +85
°
C, f = 433.92 MHz,
V
S
= 3.0 V
V
S
= 2.4 V
T
amb
= -20 ° C to +85 ° C, f = 433.92 MHz,
V
S
= 2.0 V
P
out
= P
Ref
+ D P
Ref
D P
Ref
D P
Ref
D P
Ref
-1.5
-4.0
-5.5
dB
dB
dB
Output power variation for
f = 315 MHz compared to
f = 433.92 MHz
f = 315 MHz
P
out
= P
Ref
+ D P
Ref
D P
Ref
1.5 dB
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
V
outmax
V
S
- 0.7 V V
(peak)
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
f < 230 MHz, f > 470 MHz Em
Em -40
-58 dBC
dBC