TH71081EDC Melexis Inc, TH71081EDC Datasheet - Page 7

• Manufacturer Part Number: TH71081EDC
• Description: IC XMITTER/LO SOURCE 8-SOIC
• Manufacturer: Melexis Inc

Specifications of TH71081EDC

• Rohs Status: RoHS non-compliant
• Frequency: 800MHz ~ 930MHz
• Applications: Alarm and Security Systems, RKE
• Modulation Or Protocol: ASK
• Data Rate - Maximum: 40 kbps
• Power - Output: -15dBm ~ -1dBm
• Current - Transmitting: 6.2mA ~ 12.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Features: -
• Memory Size: -
• Other names: TH71081

Fig. 2: Test circuit for ASK
Test circuit component list to Fig. 2
3901071081
Rev. 004
Test Circuit
XTAL
Part
CF1
CF2
RF1
CX
C1
C2
C3
C4
C5
C6
R1
R2
L1
L2
L3
with 50 matching network
HC49/S
Size
0603
0603
0603
0603
0603
0805
0603
0603
0805
0603
0603
0603
0603
0603
0603
fundamental wave
See output power
See output power
selection table
selection table
27.1344 MHz
0.68 pF
330 pF
330 pF
Value
8.2 nH
1.0 k
4.7 nF
2.2 pF
15 nH
22 nH
56 pF
18 pF
33 pF
33 nF
30ppm temp.
Tolerance
calibration
30ppm
10%
10%
10%
10%
10%
10%
10%
10%
10%
5%
5%
5%
5%
5%
5%
Page 7 of 10
loop filter capacitor
loop filter capacitor
XOSC capacitor
impedance matching capacitor
impedance matching capacitor
impedance matching capacitor
blocking capacitor
blocking capacitor
blocking capacitor
impedance matching inductor
impedance matching inductor
impedance matching inductor
loop filter resistor
ASK power-select resistor, not requirement at CW mode
ASK or CW mode power-select resistor
crystal, C
R
m, max
OUT
= 40
ASK Transmitter / LO Source
load
= 12 pF to 15 pF, C
C3
CF2
Description
L3
RF1
CF1
C2
CX
L2
0, max
TH71081
XTAL
C1
1 2 3
= 7 pF,
868/915MHz
L1
R2
1 2
Data Sheet
R1
Dec. 2001
C4
C5
C6
1 2