ST7540 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST7540 Datasheet PDF : 44 Pages
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Electrical characteristics
ST7540
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
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
XtalESR
XtalCL
XTAL Clock duty cycle External clock.
Crystal oscillator
frequency
fundamental
External oscillator esr
resistance
External oscillator
stabilization
capacitance
Figure 6
40
60
%
16
MHz
40
Ω
16
pF
Transmitter
ITX_OUT
VTX_OUT
VTX_OUTDC
HD2TX_OUT
HD3TX_OUT
G accuracy
GST
DRNG
CCL
VsenseTH
VsenseHYST
Output transmitting
current on TX_OUT
Max carrier output AC RCL = 1.4kΩ
voltage
Vsense = 0V
Output DC voltage on
TX_OUT
Second harmonic
VTX_OUT = 2VPP;
distortion on TX_OUT Fc = 86KHz, no load
Third harmonic
VTX_OUT = 2VPP;
distortion on TX_OUT Fc = 86KHz, no load
Accuracy on voltage
control loop active
RCL = 0Ω
ALC gain step control
loop gain step
ALC dynamic range
Input capacitance on
CL pin
Voltage control loop
reference threshold on Figure 17
Vsense pin
Hysteresis on voltage
loop reference
Figure 17
threshold
1 mArms
1.75 2.3 3.5 VPP
1.7
2.1 2.5
V
-42 dBc
-49 dBc
-1
+1 GST
0.6
1
1.4 dB
30
dB
80
pF
160 180 200 mVPK
±18
mV
10/44
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