TDA5231XT Infineon Technologies, TDA5231XT Datasheet - Page 70
TDA5231XT
Manufacturer Part Number
TDA5231XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5231XT.pdf
(186 pages)
Specifications of TDA5231XT
Operating Temperature (min)
-40C
Operating Temperature (max)
105C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Lead Free Status / Rohs Status
Compliant
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If bandwidth switching is required, the first IF Filter is wideband, and is used if the IF MUX
is switched to IFBUF-IN. The second IF Filter is narrowband, if the IF MUX is switched
to LIM-IN+, the narrow characteristic of this filter overrides the wide first IF Filter.
Figure 31
Dual:
ADDR:
2.4.8.2
The limiter is an AC coupled multistage amplifier with a wide bandpass characteristic
centered around 10.7 MHz. The limited IF signal is fed to the digital FSK Demodulator.
The limiter circuit also acts as a Receive Signal Strength Indicator (RSSI) generator that
produces a voltage signal proportional to the logarithm of the input signal level.
Data Sheet
Bit R/W Description
1
0
AIF0
W
W
0x3F
Limiter, RSSI
One-Filter application
Two-Filter application
Optional One-Filter
application
(2nd IF-filter disabled)
IFBUF: Enable IF Buffer amplifier
0: Buffer disabled, used for single IF filter
1: Buffer enabled, used for dual IF filter configuration
IFMUX: select IF-limiter input
0: use pin LIM-IN+ as input
1: use pin IFBUF-IN as input
and BIF0:
and
External IF Filter Configurations
0x60
Conf.A IF Buffer Amplifier Enable
IF-OUT
IFBUF-IN
66
IFBUF-OUT
Functional Description
Reset Value: 0x00
LIM-IN+
Version 4.0, 2007-06-01
TDA523x
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