User's Manual

4.6 Reflow Profile 4 ELECTRICAL CHARACTERISTICS
4.5.2 Transmit
Table 12: Transmit Characteristics - BLE
Parameter Conditions Min Typ Max Unit
RF transmit power - - +7.5 +10 dBm
RF power control range - - 25 - dB
Adjacent channel transmit power
F = F0 + 1 MHz - -14.6 - dBm
F = F0 - 1 MHz - -12.7 - dBm
F = F0 + 2 MHz - -44.3 - dBm
F = F0 - 2 MHz - -38.7 - dBm
F = F0 + 3 MHz - -49.2 - dBm
F = F0 - 3 MHz - -44.7 - dBm
F = F0 + > 3 MHz - -50 - dBm
F = F0 - > 3 MHz - -50 - dBm
∆ f1
avg
- - - 265 kHz
∆ f2
max
- 247 - - kHz
∆ f2
avg
/∆ f1
avg
- - -0.92 - -
ICFT - - -10 - kHz
Drift rate - - 0.7 - kHz/50 µs
Drift - - 2 - kHz
4.6 Reflow Profile
Table 13: Reflow Profile
Item Value
T
s
max to TL (Ramp-up Rate) 3°C/second max
Preheat
Temperature Min. (T
s
Min.) 150°C
Temperature Typ. (T
s
Typ.) 175°C
Temperature Min. (T
s
Max.) 200°C
Time (T
s
) 60 ~ 180 seconds
Ramp-up rate (T
L
to T
P
) 3°C/second max
Time maintained above: –Temperature (T
L
)/Time (T
L
) 217°C/60 ~ 150 seconds
Peak temperature (T
P
) 260°C max, for 10 seconds
Target peak temperature (T
P
Target) 260°C +0/-5°C
Time within 5°C of actual peak (t
P
) 20 ~ 40 seconds
T
S
max to T
L
(Ramp-down Rate) 6°C/second max
Tune 25°C to Peak Temperature (t) 8 minutes max
Note:
The 32 kHz crystal is internally connected to ESP32’s GPIO32 and GPIO33. To use ADC, Touch or GPIO functions of
IO32 and IO33, please remove the 32 kHz crystal and its capacitors — C13 and C17, and solder the 0ohm resistors —
R5 and R6.
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