u2741b ATMEL Corporation, u2741b Datasheet - Page 7

• Manufacturer Part Number: u2741b
• Description: Uhf Ask/fsk Transmitter U2741b
• Manufacturer: ATMEL Corporation

6. 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.
7. Thermal Resistance
8. Electrical Characteristics
All parameters are referred to GND (pin 5). The possible operating ranges refer to different circuit conditions:
V
4733B–RKE–09/05
Parameters
Supply current (power down)
Supply current (power up, output OFF) V
Supply current (power up, output ON) V
Output power
Output power variation for the full
temperature range
Output power variation for
f = 315 MHz compared to
f = 433.92 MHz
Maximum peak output
antenna voltage
Spurious emission
Parameters
Supply voltage
Power dissipation
Junction temperature
Storage temperature
Ambient temperature
Parameters
Junction ambient
S
= 2.0V to 5.5V at T
amb
= –20°C to +70°C, V
Test Conditions
V
V
R
R
T
V
V
T
V
P
f = 315 MHz
P
at P
the load impedance must be selected to
meet the V
the supply current is not dependent on
the load impedance tolerance
at T
f
Load capacitance at CLK 3 pF
f = 230 MHz to 470 MHz
f < 230 MHz, f > 470 MHz
o
amb
amb
ASK
ASK
ASK
S
S
S
S
out
out
PWRSET
PWRSET
±(n
= 3V, T
= 3.0V
= 2.4V
= 2.0V
amb
out
= P
= P
, V
= –40°C to +85°C, f = 433.92 MHz,
= –20°C to +85°C, f = 433.92 MHz,
= GND, V
= V
S
= 2.0 mW,
FSK
= 25°C
= 2.2V to 5.5V at T
Ref
Ref
f
S
PC
= 1.2 k
= 1.8 k
, V
amb
+ P
+ P
out
) where f
S
0.3V, V
maximum requirement
= 25°C, f = 433.92 MHz
= 3V, R
FSK
Ref
Ref
Symbol
Symbol
R
= V
T
T
P
V
S
PC
amb
T
thJA
stg
tot
S
j
< 3.6V
PWRSET
S
= 6.78 MHz
, V
s
amb
= 3V
= 1.2 k
= –40°C to +85°C (typically 25°C, 3V)
Min.
–55
–40
Symbol
IS
V
IS
IS
P
P
outmax
transmit
Em
Em
P
P
P
P
Ref
Ref
off
on
Ref
Ref
Ref
Ref
Value
180
Min.
–0.5
1.5
Max.
250
150
125
105
6
V
S
Typ.
– 0.7V
4.7
1.5
10
3
1
Max.
0.35
12.5
–1.5
–4.0
–5.5
U2741B
–40
–58
6.2
5
3
Unit
Unit
K/W
mW
°C
°C
°C
V
V
dBm
dBm
Unit
dBC
dBC
mA
mA
(peak)
µA
dB
dB
dB
dB
7