TDA5210XT Infineon Technologies, TDA5210XT Datasheet - Page 17

• Manufacturer Part Number: TDA5210XT
• Manufacturer: Infineon Technologies

Specifications of TDA5210XT

• Operating Temperature (min): -40C
• Operating Temperature Classification: Automotive
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Compliant

Wireless Components
RF
TAGC
DGND
VCC
LNI
14
13
3
4
3.4.1
VCC AGND
LNA
2,7
3.3 Functional Block Diagram
3.4 Functional Blocks
5,10
LNO
VCC
6
Figure 3-2
Low Noise Amplifier (LNA)
The LNA is an on-chip cascode amplifier with a voltage gain of 15 to 20dB. The
gain figure is determined by the external matching networks situated ahead of
LNA and between the LNA output LNO (Pin 6) and the Mixer Inputs MI and MIX
(Pins 8 and 9). The noise figure of the LNA is approximately 3dB, the current
consumption is 500µA. The gain can be reduced by approximately 18dB. The
switching point of this AGC action can be determined externally by applying a
threshold voltage at the THRES pin (Pin 23). This voltage is compared internally
with the received signal (RSSI) level generated by the limiter circuitry. In case
that the RSSI level is higher than the threshold voltage the LNA gain is reduced
and vice versa. The threshold voltage can be generated by attaching a voltage
divider between the 3VOUT pin (Pin 24) which provides a temperature stable
3V output generated from the internal bandgap voltage and the THRES pin as
described in Section 4.1. The time constant of the AGC action can be deter-
MI
: 1 / 2
FSEL
8
11
MIX
9
12
IFO
VCO
Loop
Filter
OTA
Filter
IF
Main Block Diagram
LIM
: 128 / 64
CSEL
17
16
LIMX
18
LIMITER
DET
3 - 9
TDA 5210
TDA 5210
PLL Demod
TDA 5210
CRYSTAL
FSK
1
Crystal
OSC
MSEL
28
15
+
+
-
-
FSK
ASK
FFB
22
OPP
21
+
-
OP
Functional Description
U
REF
SLP
Specification, May 2001
19
Reference
Reference
Bandgap
PDWN
AGC
SLN
20
+
-
SLICER
DETECTOR
27
PEAK
TDA 5210
25
24
23
26
Function_5200.wmf
DATA
PDO
THRES
3VOUT