TDA5212 Infineon Technologies, TDA5212 Datasheet
TDA5212
Specifications of TDA5212
Available stocks
Related parts for TDA5212
TDA5212 Summary of contents
Page 1
Wireless Components ASK/FSK 915MHz Single Conversion Receiver TDA 5212 Version 1.3 Specification December 2006 ...
Page 2
... Components used in life-support devices or systems must be expressly authorized for such purpose! 1 Critical components of the Infineon Technologies AG, may only be used in life-support devices or systems Infineon Technologies AG critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the failure of that life- support device or system affect its safety or effectiveness of that device or system ...
Page 3
Product Info General Description The very low power consump- tion single chip FSK/ASK Superhet- erodyne Receiver (SHR) for the re- ceive frequency range between 902 and 928 MHz that is pin compatible to the ASK Receiver TDA5202. ...
Page 4
Table of Contents 1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 5
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 6
Product Description Contents of this Chapter 2.1 Overview ...
Page 7
Overview The very low power consumption single chip FSK/ASK Superheterodyne Receiver (SHR) for receive frequencies between 902 and 928 MHz that is pin compatible to the ASK Receiver TDA5202. The IC offers a high level of ...
Page 8
Package Outlines Figure 2-1 Wireless Components PG-TSSOP-28 package outlines TDA 5212 Product Description P_TSSOP_28.EPS Specification, December 2006 ...
Page 9
Functional Description Contents of this Chapter 3.1 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 10
Pin Configuration Figure 3-1 Wireless Components CRST1 1 VCC 2 LNI 3 TAGC 4 AGND 5 LNO 6 VCC 7 TDA 5212 MI 8 MIX 9 AGND 10 FSEL 11 IFO 12 DGND 13 VDD 14 IC Pin Configuration ...
Page 11
Pin Definition and Function Table 3-1 Pin Definition and Function Pin No. Symbol 1 CRST1 2 VCC 3 LNI Wireless Components Equivalent I/O-Schematic 4.15V 1 50uA 57uA 3 500uA TDA 5212 Functional Description Function ...
Page 12
TAGC 4 5 AGND 6 LNO 7 VCC MIX 8 10 AGND 11 BUF Wireless Components 4.3V 4.2uA 1k 1.5uA 1. 400uA TDA 5212 Functional ...
Page 13
IFO 12 13 DGND 14 VDD 15 MSEL CSEL 16 Wireless Components 10.7 MHz IF Mixer Output 300uA 2.2V 60 4.5k Digital Ground Return 300uA 5V Supply (PLL Counter Cir- cuitry) 2.2V ASK/FSK Modulation Format Selector ...
Page 14
LIM 17 18 LIMX 18 19 SLP 19 20 SLN 20 Wireless Components 2.4V 15k 75uA 330 15k 15uA 100 3k 80µA 5uA 10k TDA 5212 Functional Description Limiter Input Complementary Limiter Input Data Slicer Positive ...
Page 15
OPP 21 22 FFB 22 23 THRES 23 24 3VOUT 24 Wireless Components 5uA 200 5uA 100k 5uA 10k 20kΩ 3. TDA 5212 Functional Description OpAmp Noninverting Input Data Filter Feedback Pin AGC Threshold Input 3V ...
Page 16
DATA 26 PDO 27 PDWN 27 28 CRST2 28 Wireless Components 500 25 40k 200 26 220k 220k 4.15V 50uA TDA 5212 Functional Description Data Output Peak Detector Output Power Down Input External Crystal Connector 2 ...
Page 17
Functional Block Diagram VCC LNO MI MIX LNI 3 RF LNA 4 TAGC BUF VCC 14 DGND 13 11 2,7 5,10 VCC AGND BUF Figure 3-2 Wireless Components IF Filter MSEL IFO LIM LIMX 12 17 ...
Page 18
Functional Blocks 3.4.1 Low Noise Amplifier (LNA) The LNA is an on-chip cascode amplifier with a voltage gain 20dB. The gain figure is determined by the external matching networks situated ahead of LNA and between the ...
Page 19
But please note that using high side injetion of the L0 yields a sign inversion of the demodulated data signal in case of FSK. See also Section 4.4. 3.4.4 Crystal Oscillator The on-chip crystal ...
Page 20
This gain was chosen to facilitate detection in the subsequent circuits. Table 3-3 MSEL Pin Operating States MSEL Open Shorted to ground The DC gain order not to ...
Page 21
Bandgap Reference Circuitry A Bandgap Reference Circuit provides a temperature stable reference voltage for the device. A power down mode is available to switch off all subcircuits which is controlled by the PWDN pin (Pin 27) as shown in ...
Page 22
Applications Contents of this Chapter 4.1 Choice of LNA Threshold Voltage and Time Constant . . . . . . . . . . . . 4-2 4.2 Data Filter Design . . . . . . . . ...
Page 23
Choice of LNA Threshold Voltage and Time Constant In the following figure the internal circuitry of the LNA automatic gain control is shown. Figure 4-1 The LNA automatic gain control circuitry consists of an operational transimpe- dance amplifier that ...
Page 24
Figure 4-2 The switching point should be chosen according to the intended operating sce- nario. The determination of the optimum point is described in the accompanying Application Note, a threshold voltage level ...
Page 25
Data Filter Design Utilising the on-board voltage follower and the two 100kΩ on-chip resistors a 2nd order Sallen-Key low pass data filter can be constructed by adding 2 exter- nal capacitors between pins 19 (SLP) and 22 (FFB) and ...
Page 26
... Wireless Components C S Input Crystal impedance Z 1-28 Determination of Series Capacitance Value for the Crystal Oscillator = the load capacitance (refer to the crystal specification). L =500 Ω =1050 Ω TDA 5212 Applications Pin 28 TDA5212 Pin 1 Quartz_load_5212.wmf 1 π 9 5 Specification, December 2006 S ...
Page 27
Crystal Frequency Calculation As mentioned in Section 3.4.3 the local oscillator (UHF PLL) signal has to be high-side injected for a RF below 921MHz and low-side injected for a RF above 921MHz into the downconverting mixer. Thus the crystal ...
Page 28
Data Slicer Threshold Generation The threshold of the data slicer can be generated in two ways, depending on the signal coding scheme used. In case of a signal coding scheme without DC content such as Manchester coding the threshold ...
Page 29
ASK/FSK Switch Functional Description The TDA5211 is containing an ASK/FSK switch which can be controlled via Pin 15 (MSEL). This switch is actually consisting of 2 operational amplifiers that are having a gain case of the ...
Page 30
DC content of FSK signal remains at 200µV/kHz. The cutoff fre- quencies of the bandpass have to be chosen such that the spectrum of the data signal is influenced in an acceptable amount. In case that the ...
Page 31
Section 4.2. 3 Example 100k Ω 47nF This leads to f and 4.6.2 ASK Mode In case the receiver is operated in ASK mode ...
Page 32
Principle of the Precharge Circuit In case the data slicer threshold shall be generated with an external RC network as described in Section 4 necessary to use large values for the capacitor C attached to the SLN ...
Page 33
This circuit charges the capacitor C with an inrush current I duration of T age U these voltages are equal or the duration T disabled. τ is the time constant of the charging process of C which can be calculated ...
Page 34
U Smax input. The time constant appearing in this case can be denoted as T3, which can be calculated with Figure 4- example the choice 20nF and C = 47nF yields τ = 0.4ms 2 ...
Page 35
Reference Contents of this Chapter 5.1 Electrical Data ...
Page 36
Electrical Data 5.1.1 Absolute Maximum Ratings WARNING The maximum ratings may not be exceeded under any circumstances, not even momentarily and individually, as permanent damage to the IC may result. Table 5-1 Absolute Maximum Ratings, Ambient temperature T # ...
Page 37
Operating Range Within the operating range the IC operates as explained in the circuit descrip- tion. The AC/DC characteristic limits are not guaranteed. Supply voltage: VCC = 4.5V .. 5.5V Table 5-2 Operating Range, Ambient temperature T # Parameter ...
Page 38
AC/DC Characteristics AC/DC characteristics involve the spread of values guaranteed within the spec- ified voltage and ambient temperature range. Typical characteristics are the median of the production. The device performance parameters marked with are not part of the production ...
Page 39
Table 5-3 AC/DC Characteristics with T # Parameter 3 Voltage Gain Antenna to IFO f = 915 MHz RF Signal Input LNI GND, low gain mode THRES 1 Input impedance 915 MHz RF 2 Input ...
Page 40
Table 5-3 AC/DC Characteristics with T Parameter Signal Output IFO (PIN 12) 1 Output impedance 2 Conversion Voltage Gain f =915 MHz RF LIMITER Signal Input LIM/X (PINS 17/18) 1 Input Impedance 2 RSSI dynamic range 3 RSSI linearity LIN ...
Page 41
Table 5-3 AC/DC Characteristics with T Parameter Symbol CRYSTAL OSCILLATOR Signals CRSTL1, CRISTL 2, (PINS 1/28) 1 Operating frequency 2 Input Impedance ~ @ 7.2MHz 3 Input Impedance ~ @ 14.5MHz 4 Serial Capacity 7.2MHz 5 Serial ...
Page 42
Table 5-3 AC/DC Characteristics with T Parameter Symbol 2 f range 14.xxMHz CRSTL 3 Input bias current CSEL Not part of the production test - either verified by design or measured in an Infineon Evalboard as described in Section 5.2. ...
Page 43
Test Circuit The device performance parameters marked with in Section 5.1.3 were either verified by design or measured on an Infineon evaluation board. Figure 5-1 Wireless Components Schematic of the Evaluation Board TDA 5212 Reference Test_circuit.wmf ...
Page 44
Test Board Layouts Figure 5-2 Figure 5-3 Wireless Components Top Side of the Evaluation Board Bottom Side of the Evaluation Board TDA 5212 Reference Specification, December 2006 ...
Page 45
Figure 5-4 Wireless Components Component Placement on the Evaluation Board TDA 5212 Reference Specification, December 2006 ...
Page 46
... Bill of Materials The following components are necessary for evaluation of the TDA5212 at 915 MHz without use of a Microchip HCS515 decoder. Table 5-4 Bill of Materials Ref Value R1 100kΩ R2 100kΩ R3 820kΩ R4 240kΩ R5 360kΩ R6 10kΩ L1 3.3nH L2 3.9nH C1 1pF C2 3 ...
Page 47
... The following components are necessary in addition to the above mentioned ones for evaluation of the TDA5212 in conjunction with a Microchip HCS512 decoder. Table 5-5 Bill of Materials Addendum Ref Value R21 22kΩ R22 10kΩ R23 22kΩ R24 820kΩ R25 560kΩ ...
Page 48
List of Figures Figure 2-1 PG-TSSOP-28 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 49
List of Tables Table 3-1 Pin Definition and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...