TDA7210 Infineon Technologies, TDA7210 Datasheet - Page 30

• Manufacturer Part Number: TDA7210
• Description: IC RECEIVER FSK/ASK 28-TSSOP
• Manufacturer: Infineon Technologies
• Type: ASK/FSK Single Conversion Receiverr

Specifications of TDA7210

• Package / Case: 28-TSSOP
• Frequency: 810MHz ~ 870MHz, 400MHz ~ 440MHz
• Sensitivity: -110dBm
• Data Rate - Maximum: 100 kbps
• Modulation Or Protocol: ASK, FSK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 5.9mA
• 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 Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Current: 7.7 mA
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SP000524274; TDA7210; TDA7210INTR

Wireless Components
This offset voltage is generated by the bias current of the negative input of the
comparator (i.e. 20nA) running over the external resistor R1. This voltage raises
the voltage appearing at pin 20 (e.g. 1mV with R1 = 100k Ω ). In order to obtain
benefit of this asymmetrical offset for the demodulation of long zeros the lower
of the two FSK frequencies should be chosen in the transmitter as the zero-
symbol frequency.
In the following figure the shape of the above mentioned bandpass is shown.
Figure 4-8
The cutoff frequencies are calculated with the following formulas:
f
Example:
R1 = 100k Ω, C13 = 47nF
This leads tof
3
is the 3dB cutoff frequency of the data filter - see Section 4.2.
Frequency characterstic in case of FSK mode
v -3dB
1
gain (pin19)
0dB
3dB
= 44Hzandf
v
DC
0.18m V/k Hz
4 - 9
f1
f
1
20dB/dec
2
=
= 485Hz
2
f
π
2
=
R
R
f
1
v
3
f2
1
=
⋅
+
⋅
2m V/k Hz
f
330
1
330
f
=
3
1
dB
11 f
k
k
Ω
⋅
Ω
1
⋅
C
13
Data Sheet, December 2008
f3
-40dB/dec
Applications
TDA7210
frequenzgang.WMF
f