TDA5102NT Infineon Technologies, TDA5102NT Datasheet - Page 16

• Manufacturer Part Number: TDA5102NT
• Manufacturer: Infineon Technologies

Specifications of TDA5102NT

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Product Depth (mm): 4.4mm
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Lead Free Status / Rohs Status: Not Compliant

Wireless Components
To achieve FSK transmission, the oscillator frequency can be detuned by a
fixed amount by switching an external capacitor via FSKOUT (pin 11).
The condition of the switch is controlled by the signal at FSKDTA (pin 7).
3.4.3 Power Amplifier
For operation at 915 MHz, the power amplifier is fed directly from the voltage
controlled oscillator. It is possible to feed the power amplifier with the VCO fre-
quency divided by 2. This is controlled by FSEL (pin 15) as described in the
table below.
The Power Amplifier can be switched on and off
by the signal at ASKDTA (pin 6).
The Power Amplifier has an Open Collector output at PAOUT (pin 14) and
requires an external pull-up coil to provide bias. The coil is part of the tuning and
matching LC circuitry to get best performance with the external loop antenna.
To achieve the best power amplifier efficiency, the high frequency voltage swing
at PAOUT (pin 14) should be twice the supply voltage.
The power amplifier has its own ground pin PAGND (pin 13) in order to reduce
the amount of coupling to the other circuits.
Table 3-5
Table 3-6
Table 3-7
1) Low:
2) Open:
3) High:
1) Low:
2) Open:
1) Low:
2) Open:
3) High:
ASKDTA (pin 6)
FSKDTA (pin7)
Open
Open
FSEL (pin 15)
Open
Low
Low
Low
Voltage at pin < 0.5 V
Pin open
Voltage at pin > 1.5 V
Voltage at pin < 0.5 V
Pin open
Voltage at pin < 0.5 V
Pin open
Voltage at pin > 1.5 V
2)
2)
, High
, High
1)
1)
1)
2)
3 - 9
3)
3)
Radiated Frequency Band
Power Amplifier
FSK Switch
Specification, October 2001
Functional Description
CLOSED
457 MHz
915 MHz
OPEN
OFF
ON
TDA 5102