TH7122ENE Melexis Inc, TH7122ENE Datasheet - Page 2

• Manufacturer Part Number: TH7122ENE
• Description: IC TXRX 930MHZ FSK/FM/ASK 32LQFP
• Manufacturer: Melexis Inc

Specifications of TH7122ENE

• Frequency: 300MHz ~ 930MHz
• Data Rate - Maximum: 115Kbps
• Modulation Or Protocol: ASK, FM, FSK
• Applications: Alarm and Security Systems, RKE, TPMS
• Power - Output: -10dBm ~ 11dBm
• Sensitivity: -105dBm
• Voltage - Supply: 2.2 V ~ 5.5 V
• Current - Receiving: 14mA
• Current - Transmitting: 23mA @ 10dBm
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Transmitting Current: 12mA
• Data Rate: 115Kbps
• Frequency Range: 300MHz To 930MHz
• Modulation Type: AM, FM, FSK
• Sensitivity Dbm: -105dBm
• Rf Ic Case Style: LQFP
• No. Of Pins: 32
• Supply Voltage: RoHS Compliant
• Output Power: 10dBm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TH7122.3; TH7122ENETR

Document Content
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39010 07122
Rev. 010
1.1
1.2
1.3
1.4
1.5
3.1
3.2
3.3
4.1
4.2
Theory of Operation ...................................................................................................4
Pin Definitions and Descriptions ..............................................................................6
Functional Description ............................................................................................10
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
3.1.8
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
Description of User Modes......................................................................................18
4.1.1
4.1.2
4.1.3
4.1.4
4.2.1
Register Description ................................................................................................20
General ............................................................................................................................. 4
Technical Data Overview.................................................................................................. 4
Note on ASK Modulation .................................................................................................. 4
Block Diagram .................................................................................................................. 5
User Mode Features ......................................................................................................... 5
PLL Frequency Synthesizer ........................................................................................... 10
Receiver Part .................................................................................................................. 13
Transmitter Part .............................................................................................................. 15
Stand-alone User Mode Operation ................................................................................. 18
Programmable User Mode Operation............................................................................. 19
Reference Oscillator (XOSC)..................................................................................................... 11
Reference Divider ...................................................................................................................... 11
Feedback Divider ....................................................................................................................... 11
Frequency Resolution and Operating Frequency ...................................................................... 11
Phase-Frequency Detector ........................................................................................................ 12
Lock Detector............................................................................................................................. 12
Voltage Controlled Oscillator with external Loop Filter.............................................................. 13
Loop Filter .................................................................................................................................. 13
LNA ............................................................................................................................................ 14
Mixer .......................................................................................................................................... 14
IF Amplifier ................................................................................................................................. 14
ASK Demodulator ...................................................................................................................... 14
FSK Demodulator ...................................................................................................................... 15
Power Amplifier.......................................................................................................................... 15
Output Power Adjustment .......................................................................................................... 16
Modulation Schemes ................................................................................................................. 16
ASK Modulation ......................................................................................................................... 16
FSK Modulation ......................................................................................................................... 17
Crystal Tuning............................................................................................................................ 17
Frequency Selection .................................................................................................................. 18
Operation Mode ......................................................................................................................... 18
Modulation Type ........................................................................................................................ 19
LNA Gain Mode ......................................................................................................................... 19
Serial Control Interface Description ........................................................................................... 19
Page 2 of 44
FSK/FM/ASK Transceiver
27 to 930MHz
TH7122
Data Sheet
Feb/09