TDA5230 Infineon Technologies, TDA5230 Datasheet - Page 72

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TDA5230

Manufacturer Part Number
TDA5230
Description
IC RECEIVER ASK/FSK 28-TSSOP
Manufacturer
Infineon Technologies
Type
Receiverr
Datasheet

Specifications of TDA5230

Package / Case
28-TSSOP
Frequency
433MHz ~ 450MHz, 865MHz ~ 868MHz
Sensitivity
-111dBm
Data Rate - Maximum
20 kbps
Modulation Or Protocol
ASK, FSK
Applications
RKE, TPM, Security Systems
Current - Receiving
8mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
3 V ~ 3.6 V, 4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 105°C
Operating Frequency
870 MHz
Operating Supply Voltage
3.3 V, 5 V
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Memory Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
SP000076520
TDA5230
TDA5230INTR

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Figure 33
The true RSSI signal is calculated by the following rule:
The result of this calculation is about -1 for no input signal (=noise), and about +1 for
large input signals (e.g. -10 dBm).
The RSSI Signals are also sampled by an AD converter, with four differential input
signals for the RSSI and the RSSI voltage reference. The true RSSI is automatically
calculated, using the following formula and the result stretched to values from 0 to 255.
The digital output of the ADC is used for processing ASK modulated data, and for two
peak detectors, which are accessible via SFRs and are described in
RSSI Peak
important that the true RSSI level at noise is >-0.92, which means it is clearly inside the
ADC range. Otherwise, small input signals are not recognized and sensitivity is
decreased.
Data Sheet
2,50 V
2,00 V
0,50 V
1 ,50 V
1 ,00 V
Detector. The range of the ADC is smaller than the range of real RSSI. It is
Typical RSSI+ over Input Signal Power
-1 25
RSSI
-1 1 5
Typical RSSI+ over Input Signal Power
RSSI
=
-1 05
RSSI+
------------------------------------------------ -
REF+
=
-95
RSSI+
-------------------------------------------------
REF+
Input Signal Pow er [dBm]
-85
68
REF-
RSSI-
-75
REF-
RSSI-
+
-65
1
×
1
-- -
2
-55
×
255
Functional Description
-45
Version 4.0, 2007-06-01
Chapter 2.4.8.3
-35
trimmed
TDA523x
-25

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