U2741B
| Model | U2741B |
| Description | UHF ASK/FSK TRANSMITTER |
| PDF file | Total 9 pages (File size: 187K) |
| Chip Manufacturer | ATMEL |
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
P
tot
T
j
T
stg
T
amb
-55
-40
6
250
150
125
105
V
mW
°
C
°
C
°
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
IS
on
IS
transmit
P
Ref
P
Ref
D
P
Ref
D
P
Ref
D
P
Ref
0.35
4.7
10
1.5
-0.5
3
1
6.2
12.5
5
3
-1.5
-4.0
µA
mA
mA
dBm
dBm
dB
dB
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 k
W
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
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
f = 315 MHz
P
out
= P
Ref
+
D
P
Ref
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
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
Output power variation for the full
temperature range
-5.5
dB
Output power variation for
f = 315 MHz compared to
f = 433.92 MHz
D
P
Ref
1.5
dB
Maximum peak output
antenna voltage
V
outmax
V
S
- 0.7 V
V
(peak)
Spurious emission
Em
Em
-40
-58
dBC
dBC
6
U2741B
4733A–RKE–11/03
Related PDFs
| Model | Description | Manufacturer | Operation |
|---|---|---|---|
 U2741B-NFB
|
UHF ASK/FSK TRANSMITTER | ATMEL | Preview |
|
U2741B-NFBG3
|
UHF ASK/FSK TRANSMITTER | ATMEL | Preview |
