STB4395 Datasheet, PDF (14/16 Pages) STMicroelectronics – CT2 RECEIVER/TRANSMITTER

STB4395
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 V_N. The output has to be smoothed externally with a capacitor to V_N.
Symbol
Description
Min.
Typ.
Max.
Unit
PMIN
Min RF Input Power Registered
-90
dBm
PMAX
Max RF Input Power Registered
-44
dBm
R_OUT
Output Resistance (internally connected to V_N)
50
kΩ
V_MIN
Voltage for P_MIN
V_N+1.25 V_N+2
V
VMAX
Voltage for PMAX
VN
VN+0.25
V
CF
conversion factor
-200
mV/decade
8.10 - Power Down Buffer, EN
Symbol
VIH
V_IL
IIH
IIL
tON
tOFF
Description
Upper Level Input Voltage
Lower Level Input Voltage
Input Current High
Input Current Low
Buffer Delay to LOCK HI (1)
Buffer Delay to min Supply Current (1)
(1) assumes application circuit with 100nF on each regulator.
8.11 - Transmitter-Data Inputs
8.11.1 - I,Q,REFIQ (STB4395A)
Symbol
REXT
R_INT
R_IM
VDC
V_{DC match}
V_S
VS match
Description
External Input Resistance
Internal Input Resistance
R_INT Matching Error
DC Bias to REXT
V_DC Matching Error to R_EXT
Peak Voltage Swing to R_EXT
VS Matching Error to REXT
Phase(I-Q)
VHS = (VP + VN)/2
8.11.2 - I,Q,NI,NQ (STB4395)
VHS = (VP+VN)/2 - VHR = (VP+VRD)/2
Symbol
Description
REXT
External Input Resistance
R_INT
R_IM
Internal Input Resistance
R_INT Matching Error
VDC
DC bias to REXT
V_{DC match}
V_S
V_DC Matching Error to R_EXT
Peak Voltage Swing to R_EXT
VS match VS Matching Error to REXT
Phase (I/Ibar and Q/Qbar)
Phase I to Ibar or Q to Qbar
Min .
VP -0.3
V_N -0.4
-350
Typ.
Max. Unit
VP +0.4 V
V_N +0.3 V
µA
10
µA
10
ms
10
ms
Min.
6.5
32
0.96VHS
0.45
88.5
Typ.
6.8
40
0.5
90
Max. Units
7
kΩ
50
kΩ
1
%
1.04VHS V
5
mV
0.56
V
0.5
dB
91.5 degrees
Min.
32
VHS-0.7
0.7
88.5
Typ.
2
40
0.75
90
0
Max.
Unit
kΩ
50
kΩ
1
%
VHR+0.7 V
12
mV
0.85
V
20
mV
91.5 degrees
degrees
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