TDA5210 Infineon Technologies, TDA5210 Datasheet - Page 29

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TDA5210

Manufacturer Part Number
TDA5210
Description
IC LP FSK/ASK SHR P-TSSOP-28
Manufacturer
Infineon Technologies
Type
Receiverr
Datasheet

Specifications of TDA5210

Package / Case
28-TSSOP
Frequency
810MHz ~ 870MHz, 400MHz ~ 440MHz
Sensitivity
-107dBm
Modulation Or Protocol
ASK, FSK
Applications
Alarm Systems, Communication Systems
Current - Receiving
4.8mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
4.6 V ~ 5.5 V
Operating Temperature
-40°C ~ 105°C
Operating Frequency
870 MHz
Operating Supply Voltage
5 V
Maximum Operating Temperature
+ 150 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Operating Temperature (min)
-40C
Operating Temperature Classification
Automotive
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
Lead free / RoHS Compliant
Features
-
Memory Size
-
Data Rate - Maximum
-
Lead Free Status / Rohs Status
Compliant
Other names
SP000016384
TDA5210INTR

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Wireless Components
4.6.1
4.6 ASK/FSK Switch Functional Description
The TDA5210 is containing an ASK/FSK switch which can be controlled via
Pin 15 (MSEL). This switch is actually consisting of 2 operational amplifiers that
are having a gain of 1 in case of the ASK amplifier and a gain of 11 in case of
the FSK amplifier in order to achieve an appropriate demodulation gain charac-
teristic. In order to compensate for the DC-offset generated especially in case
of the FSK PLL demodulator there is a feedback connection between the
threshold voltage of the bit slicer comparator (Pin 20) to the negative input of
the FSK switch amplifier. This is shown in the following figure.
Figure 4-7
FSK Mode
The FSK datapath has a bandpass characterisitc due to the feedback shown
above (highpass) and the data filter (lowpass). The lower cutoff frequency f2 is
determined by the external RC-combination. The upper cutoff frequency f3 is
determined by the data filter bandwidth.
The demodulation gain of the FSK PLL demodulator is 140µV/kHz. This gain is
increased by the gain v of the FSK switch, which is 11. Therefore the resulting
dynamic gain of this circuit is 2mV/kHz within the bandpass. The gain for the DC
content of FSK signal remains at 140µV/kHz. The cutoff frequencies of the
bandpass have to be chosen such that the spectrum of the data signal is influ-
enced in an acceptable amount.
In case that the user data is containing long sequences of logical zeroes the
effect of the drift-off of the bit slicer threshold voltage can be lowered if the offset
voltage inherent at the negative input of the slicer comparator (Pin20) is used.
The comparator has no hysteresis built in.
0.18 mV/kHz
1.5 V......2.5 V
typ. 2 V
FSK PLL Demodulator
ASK/FSK mode datapath
RSSI (ASK signal)
ASK mode : v=1
FSK mode : v=11
4 - 8
R
-
+
+
-
4
=30k
ASK
FSK
15
R
ASK/FSK Switch
3
=300k
MSEL
R
1
FFB
=100k
22
R
2
=100k
C
Data Filter
2
21
OPP
v = 1
C
1
SLP
19
Specification, May 2001
R
20
-
+
SLN
C
Applications
Comp
TDA 5210
ask_fsk_datapath.WMF
DATA Out
25

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