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STB4395 Arkusz danych(PDF) 14 Page - STMicroelectronics

Numer części STB4395
Szczegółowy opis  CT2 RECEIVER/TRANSMITTER
PDF  16 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STB4395 Arkusz danych(HTML) 14 Page - STMicroelectronics

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8 - TRANSCEIVER SECTION (continued)
8.9 - Receiver-RSSI Output
The receiver output swings between VP and VN.The buffer output supplies a current to an on-chip resistor
connected to VN. The output has to be smoothed externally with a capacitor to VN.
Symbol
Description
Min.
Typ.
Max.
Unit
PMIN
Min RF Input Power Registered
-90
dBm
PMAX
Max RF Input Power Registered
-44
dBm
ROUT
Output Resistance (internally connected to VN)50
k
Ω
VMIN
Voltage for PMIN
VN+1.25
VN+2
V
VMAX
Voltage for PMAX
VN
VN+0.25
V
CF
conversion factor
-200
mV/decade
8.10 - Power Down Buffer, EN
Symbol
Description
Min.
Typ.
Max.
Unit
VIH
Upper Level Input Voltage
VP -0.3
VP +0.4
V
VIL
Lower Level Input Voltage
VN -0.4
VN +0.3
V
IIH
Input Current High
-350
µA
IIL
Input Current Low
10
µA
tON
Buffer Delay to LOCK HI (1)
10
ms
tOFF
Buffer Delay to min Supply Current (1)
10
ms
(1) assumes application circuit with 100nF on each regulator.
8.11 - Transmitter-Data Inputs
8.11.1 - I,Q,REFIQ (STB4395A)
Symbol
Description
Min.
Typ.
Max.
Units
REXT
External Input Resistance
6.5
6.8
7
k
Ω
RINT
Internal Input Resistance
32
40
50
k
Ω
RIM
RINT Matching Error
1
%
VDC
DC Bias to REXT
0.96VHS
1.04VHS
V
VDC match
VDC Matching Error to REXT
5mV
VS
Peak Voltage Swing to REXT
0.45
0.5
0.56
V
VS match
VS Matching Error to REXT
0.5
dB
Phase(I-Q)
88.5
90
91.5
degrees
VHS = (VP +VN)/2
8.11.2 - I,Q,NI,NQ (STB4395)
VHS = (VP+VN)/2 - VHR = (VP+VRD)/2
Symbol
Description
Min.
Typ.
Max.
Unit
REXT
External Input Resistance
2
k
Ω
RINT
Internal Input Resistance
32
40
50
k
Ω
RIM
RINT Matching Error
1
%
VDC
DC bias to REXT
VHS-0.7
VHR+0.7
V
VDC match
VDC Matching Error to REXT
12
mV
VS
Peak Voltage Swing to REXT
0.7
0.75
0.85
V
VS match
VS Matching Error to REXT
20
mV
Phase (I/Ibar and Q/Qbar)
88.5
90
91.5
degrees
Phase I to Ibar or Q to Qbar
0
degrees
STB4395
14/16



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