TDK5101 Infineon Technologies, TDK5101 Datasheet - Page 29

• Manufacturer Part Number: TDK5101
• Description: TRANSMITTER ASK/FSK SGL TSSOP16
• Manufacturer: Infineon Technologies
• Type: Transmitterr

Specifications of TDK5101

• Package / Case: 16-TSSOP
• Frequency: 315MHz
• Applications: Alarm Systems, Communication Systems
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 20 kbps
• Power - Output: 5dBm
• Current - Transmitting: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.1 V ~ 4 V
• Operating Temperature: -25°C ~ 85°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
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Product Depth (mm): 4.4mm
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000014558; SP000014559; TDK5101T

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, 700
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
0 *E
o [m W ]
O
I
L
C
, as shown in Figure 4-7.
~
~
7
6
5
4
3
2
1
0
R
V
Output power P
0
OPT
S
L
> R
o
4 - 10
LC
is reduced by operating in an “overcritical” mode
1 0 0 0
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
L
.
OPT
and P
is the optimum impedance for operation
2 0 0 0
OUT
at other supply voltages those
R L [O h m ]
Specification, October 2002
3 0 0 0
1 0 *E
P o
Applications
TDK 5101
Power_E_vs_RL.wmf
S
= 3 V.
L
.
o