TDA5212 Infineon Technologies, TDA5212 Datasheet - Page 33

• Manufacturer Part Number: TDA5212
• Description: IC FSK/ASK RECEIVER P-TSSOP-28
• Manufacturer: Infineon Technologies
• Type: Receiverr

Specifications of TDA5212

• Package / Case: 28-TSSOP
• Frequency: 902MHz ~ 928MHz
• Sensitivity: -109dBm
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, Remote Control Systems
• Current - Receiving: 5.4mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 928 MHz
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Data Rate - Maximum: -
• Lead Free Status / Rohs Status: Compliant
• Other names: TDA5212INTR

Wireless Components
This circuit charges the capacitor C with an inrush current I
duration of T
age U
these voltages are equal or the duration T
disabled.
τ
as the sum of R1 and R2 is sufficiently large and thus can be neglected. T2 can
then be calculated according to the following formula:
The voltage transient during the charging of C2 is shown in the following figure:
Figure 4-11
The voltage appearing on the capacitor C connected to pin 20 is shown in the
following figure. It can be seen that due to the fact that it is charged by a con-
stant current source it exhibits is a linear increase in voltage which is limited to
2
is the time constant of the charging process of C which can be calculated as
s
2.4V
at the input of the data filter. This voltage is limited to 2.5V. As soon as
3V
U2
2
Voltage appearing on C2 during precharging process
until the voltage U
4 - 12
T
2
=
τ
2
c
ln
τ
2
appearing on the capacitor is equal to the volt-
2






≈
1
20
−
2
k ×
1
3
Ω
4 .
V
2
V
T2
is exceeded the precharge circuit is
C






2
≈
τ
2
⋅
Specification, December 2006
1
6 .
load
of 240µA for a
Applications
TDA 5212
e-fkt1.WMF