T5754-6APJ Atmel, T5754-6APJ Datasheet - Page 6

• Manufacturer Part Number: T5754-6APJ
• Description: RF Transmitter ASK/FSK Transmitter 429 - 439 MHz
• Manufacturer: Atmel
• Type: Transmitterr

Specifications of T5754-6APJ

• Package / Case: TSSOP-8
• Operating Frequency: 439 MHz
• Maximum Operating Temperature: 125 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.5 V, 3.3 V
• Operating Temperature (max): 125C
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.4
6
Application Circuit
T5754
Figure 4-2.
For the supply-voltage blocking capacitor C
4-3 on page 7
power amplifier where C
for C
the possibility to realize the Z
C
suppresses the 1
best suppression is achieved when C
ANT2.
The loop antenna should not exceed a width of 1.5 mm, otherwise the Q-factor of the loop
antenna is too high.
L
load resonance frequency of the crystal. Normally, a value of 12 pF results for a 15 pF
load-capacitance crystal.
1
1
([50 nH to 100 nH) can be printed on PCB. C
forms together with the pins of T5754 and the PCB board wires a series resonance loop that
2
two capacitors in series should be used to achieve a better tolerance value and to have
Output Power Measurement
and
st
Figure 4-4 on page
harmonic, hence the position of C
ANT1
ANT2
1
typically is 8.2 pF/NP0 and C
Load,opt
Z
Lopt
V
L
S
1
by using standard valued capacitors.
33 nH
2.2 pF
8). C
1
1 nF
is placed as close as possible to the pins ANT1 and
C
C
1
2
3
1
a value of 68 nF/X7R is recommended (see
and C
4
should be selected that the XTO runs on the
2
Z = 50
are used to match the loop antenna to the
1
2
on the PCB is important. Normally the
is 6 pF/NP0 (10 pF + 15 pF in series);
Power
meter
50
R
in
4511I–RKE–02/07
Figure