TDK5101 Infineon Technologies, TDK5101 Datasheet - Page 30

• 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
As Figure 4-8 shows, detuning beyond the bandwidth of the matching circuit
results in a significant increase of collector current of the power amplifier and in
some loss of output power. This diagram shows the data for the circuit of the
test board at the frequency of 315 MHz. The effective load resistance of this
circuit is R
will lead to a dip of the collector current of approx. 40%.
Figure 4-8
C3, L2-C2 and C8 are the main matching components which are used to
transform the 50
PA-output (700
frequency but should not become too small in order to keep its losses low.
The transformed impedance of 700+j0
with a network analyzer using the following measurement procedure:
1. Calibrate your network analyzer.
2. Connect some short, low-loss 50
3. Use the „Port Extension“ feature of your network analyzer to shift the refer-
4. Connect the center-conductor of the cable to the solder pad of the pin „PA“
5. Screw a 50
6. Be sure that your network analyzer is AC-coupled and turn on the power
7. Measure the S-parameter S11
open end on one side. Semirigid cable works best.
ence plane of your network analyzer to the open end of the cable.
of the IC. The outer conductor has to be grounded. Very short connections
have to be used. Do not remove the IC or any part of the matching-compo-
nents!
supply of the IC. The TDK5101 must not be in Transmit-Mode.
L
6
5
4
3
2
1
0
= 700 , which is the optimum impedance for operation at 3 V. This
4 2 0
Output power and collector current vs. frequency
Ic [mA ]
Po [d B m]
dummy-load on the RF-I/O-SMA-connector
@ 3 V). L1 can be used for some finetuning of the resonant
load at the SMA-RF-connector to a higher impedance at the
4 - 11
4 3 0
f [M H z ]
cable to your network analyzer with an
at the PA-output-pin can be verified
4 4 0
Specification, October 2002
4 5 0
Applications
TDK 5101
pout_vs_frequ.wmf