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TDA5102 Datasheet(PDF) 10 Page - Infineon Technologies AG

Part No. TDA5102
Description  ASK/FSK Transmitter 915 MHz
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Maker  INFINEON [Infineon Technologies AG]
Homepage  http://www.infineon.com
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 10 page
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Functional Description
3 - 3
TDA 5102
Wireless Components
Specification, October 2001
3.2 Pin Definitions and Functions
Table 3-2
Pin
No.
Symbol
Interface Schematic
Function
1
PDWN
Disable pin for the complete transmitter cir-
cuit.
A logic low (PDWN < 0.7 V) turns off all
transmitter functions.
A logic high (PDWN > 1.5 V) gives access to
all transmitter functions.
PDWN input will be pulled up by 40 µA inter-
nally by either setting FSKDTA or ASKDTA
to a logic high-state.
2
LPD
This pin provides an output indicating the
low-voltage state of the supply voltage VS.
VS < 2.15 V will set LPD to the low-state.
An internal pull-up current of 40 µA gives the
output a high-state at supply voltages above
2.15 V.
3
VS
This pin is the positive supply of the trans-
mitter electronics.
An RF bypass capacitor should be con-
nected directly to this pin and returned to
GND (pin 5) as short as possible.
1
V
S
150 k
5 k
250 k
"ON"
40
µA ∗ (ASKDTA+FSKDTA)
V
S
300
2
40 µA




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