TH7122ENE Melexis Inc, TH7122ENE Datasheet - Page 38

• 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

8
The operating frequency range of 300 MHz to 930 MHz can be covered without the use of an additional VCO
varactor diode. A frequency range extension down to 27 MHz can be realized by adding an external varactor
diode to the VCO tank.
Fig. 18: VCO tank circuit for
8.1
Note: The component values are optimized for the above listed settings of f
lation as explained in section 3.3.5 must be applied.
39010 07122
Rev. 010
CRX0
CTX4
CTX0
Part
LTX0
RPS
CB2
VD1
CF1
CF2
RB0
RF1
CB6
CB7
C01
R01
RF
C0
LO injection
L0
Extended Frequency Range
Board Component List (Fig. 18)
NR
NT
f
R
SOD-323
extended frequency range
Size
0805
0805
0603
0605
0605
0605
0605
0805
0805
0805
0805
0805
0805
0805
0805
0805
0805
Value @
27 MHz
25 kHz
330 pF
BBY65
220 nF
100 nF
1.2 µH
2.2 µH
1.8 kΩ
100 Ω
10 kΩ
15 kΩ
10 nF
10 nF
10 nF
1080
1508
22 Ω
high
1 nF
1 µF
NIP
NIP
Value @
40 MHz
25 kHz
330 nH
330 pF
BBY65
100 nF
100 nF
1.8 kΩ
1.0 µH
100 Ω
10 kΩ
15 kΩ
TX_OUT
33 pF
10 nF
10 nF
10 nF
1600
2028
22 Ω
1 nF
1 µF
high
NIP
RX_IN
Combining
network
Value @
80 MHz
LTX0
CF2
25 kHz
CTX0
CRX0
220 nH
220 nH
330 pF
100 nF
BB639
1.8 kΩ
100nF
100 Ω
10 kΩ
15 kΩ
68 pF
10 nF
10 nF
10 nF
3200
2772
18pF
CB2
NIP
1µF
low
0 Ω
Page 38 of 44
RPS
CTX4
25
26
27
28
29
OUT_PA
IN_LNA
VEE_LNA
OUT_LNA
GAIN_LNA
144 MHz
Value @
25 kHz
100 nH
100 nH
330 pF
BB833
100 nF
100 nF
2.7 kΩ
100pF
100 Ω
10 kΩ
22 kΩ
10 pF
5760
5332
1 nF
1 nF
1 nF
1µF
low
NIP
0 Ω
RF
TH7122
170 MHz
Value @
100 kHz
R01
VD1
100 nH
100 pF
330 pF
100 nF
220 pF
220 pF
100 nF
L0
BB535
8.2 pF
100 Ω
390 Ω
10 kΩ
33 kΩ
47 nH
C0
1700
1807
high
1 nF
FSK/FM/ASK Transceiver
NIP
1µF
0 Ω
C01
R
, NR and NT. Direct VCO modu-
varactor diode
protection resistor
VCO tank resistor
loop filter resistor
loop filter resistor
power-select resistor
VCO tank inductor
VCO tank capacitor
VCO tank capacitor
de-coupling capacitor
loop filter capacitor
loop filter capacitor
TX impedance matching capacitor
TX coupling capacitor
RX coupling capacitor
TX impedance matching inductor
de-coupling capacitor
de-coupling capacitor
detect
VCC_DIG
RE/SCLK
ASK/FSK
Lock
RB0
CB6
frequency resolution
16
15
14
13
Description
NR counter
NT counter
27 to 930MHz
SDEN
CB7
SDTA
SCLK
TH7122
3wire bus
Data Sheet
VCC
VCC
Feb/09