TH71111 Datasheet, PDF (8/22 Pages) Melexis Microelectronic Systems – 868/915MHz FSK/FM/ASK Receiver

TH71111
868/915MHz
FSK/FM/ASK Receiver
Pin No. Name
21 RSSI
I/O Type
analog
output
Functional Schematic
RSSI
21
I (Pi)
50Ω
36k
22 VEE_BIAS ground
23 OUTP
analog
output
OUTP
OUTN
50Ω
24 OUTN
analog
23
output
24
20µA
20µA
25 VEE_RO ground
26 RO
analog
input
50k
RO
26
30p
30p
27 VCC_PLL supply
28 ENRX
digital
input
ENRX
1.5k
28
Description
RSSI output, for RSSI and
ASK detection, approx.
36kΩ output impedance
ground of general
bias system and OA
FSK/FM positive output,
output impedance of
100kΩ to 300kΩ
FSK/FM negative output,
output impedance of
100kΩ to 300kΩ
ground of DIV, PFD, RO
and charge pump
RO input, Colpitts type
oscillator with internal feed-
back capacitors
positive supply of DIV, PFD,
RO and charge pump
mode control input,
CMOS-compatible with
internal pull-down circuit
29 LF
analog I/O
LF
29
30 VEE_LNA ground
32 VCC_LNA supply
200Ω
400Ω
4p
charge pump output and
VCO1 control input
ground of LNA biasing
positive supply of
LNA biasing
39010 71111
Rev. 013
Page 8 of 22
Data Sheet
June/07