TDK5111 Infineon Technologies, TDK5111 Datasheet - Page 29

• Manufacturer Part Number: TDK5111
• Description: TRANSMITTER ASK/FSK SGL TSSOP16
• Manufacturer: Infineon Technologies
• Type: Transmitterr

Specifications of TDK5111

• Package / Case: 16-TSSOP
• Frequency: 314MHz ~ 317MHz
• Applications: Alarm Systems, Communication Systems
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 20 kbps
• Power - Output: 10dBm
• Current - Transmitting: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.1 V ~ 4 V
• Operating Temperature: -40°C ~ 125°C
• Operating Frequency: 317 MHz
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: SP000014016; SP000014017; TDK5111T

Wireless Components
The output power P
characterised by R
The power efficiency (and the bandwidth) increase when operating at a slightly
higher R
The collector efficiency E is defined as
The diagram of Figure 4-7 was measured directly at the PA-output at V
Losses in the matching circuitry decrease the output power by about 1.5 dB. As
can be seen from the diagram, 250
at 3 V. For an approximation of R
2 formulas can be used:
and
Figure 4-7
The DC collector current I
vary with the load resistor R
amplifiers. The collector current will show a characteristic dip at the resonance
frequency for this type of “overcritical” operation. The depth of this dip will
increase with higher values of R
E
P
R
V
OUT
OPT
P
S
O
I
L
C
, as shown in Figure 4-7.
~
~
R
18
16
14
12
10
V
8
6
4
2
0
Output power P
OPT
0
S
L
> R
100
o
4 - 10
LC
is reduced by operating in an “overcritical” mode
c
.
o
of the power amplifier and the RF output power P
L
(mW) and collector efficiency E vs. load resistor R
. This is typical for overcritical operation of class C
200
RL [Ohm]
L
.
OPT
300
and P
is the optimum impedance for operation
OUT
400
at other supply voltages those
500
Specification, October 2002
Pout [mW]
10*Ec
Applications
TDK 5111
Power_E_vs_RL.wmf
S
= 3 V.
L
.
o