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ST7540 bảng dữ liệu(PDF) 10 Page - STMicroelectronics

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Electrical characteristics
ST7540
10/44
VOH
High logic level output
voltage
IOH= -2mA
VDD -
0.75
V
VOL
Low logic level output
voltage
IOL= 2mA
GND
+ 0.4
V
Oscillator
External Clock X2 voltage swing
External clock. Figure 4
5
Vpp
External Clock X2 DC voltage level
External clock. Figure 4
2.5
V
DC
XTAL Clock duty cycle
External clock.
40
60
%
Xtal
Crystal oscillator
frequency
fundamental
16
MHz
XtalESR
External oscillator esr
resistance
40
XtalCL
External oscillator
stabilization
capacitance
Figure 6
16
pF
Transmitter
ITX_OUT
Output transmitting
current on TX_OUT
1mArms
VTX_OUT
Max carrier output AC
voltage
RCL = 1.4kΩ
Vsense = 0V
1.75
2.3
3.5
VPP
VTX_OUTDC
Output DC voltage on
TX_OUT
1.7
2.1
2.5
V
HD2TX_OUT
Second harmonic
distortion on TX_OUT
VTX_OUT = 2VPP;
Fc = 86KHz, no load
-42
dBc
HD3TX_OUT
Third harmonic
distortion on TX_OUT
VTX_OUT = 2VPP;
Fc = 86KHz, no load
-49
dBc
G accuracy
Accuracy on voltage
control loop active
RCL = 0Ω
-1
+1
GST
GST
ALC gain step control
loop gain step
0.6
1
1.4
dB
DRNG
ALC dynamic range
30
dB
CCL
Input capacitance on
CL pin
80
pF
VsenseTH
Voltage control loop
reference threshold on
Vsense pin
Figure 17
160
180
200
mVPK
VsenseHYST
Hysteresis on voltage
loop reference
threshold
Figure 17
±18
mV
Table 5. Electrical characteristics (continued)
( VDD = +5V, VCC =+9 V, VSS = SVSS = GND = 0V,-40°C ≤TA ≤85°C, TJ < 125°C,
unless otherwise specified)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit


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