RF-WM-3220B1
Shenzhen RF-star Technology Co., Ltd.
Page 16 of 37
3 Specifications
3.1 Absolute Maximum Ratings
All measurements are referenced at the device pins, unless otherwise indicated. All specifications are over process and
voltage, unless otherwise indicated.
Table 4. Absolute Maximum Ratings
Parameters
Condition
Min.
Typ.
Max.
Unit
Supply Voltage
V
BAT
and V
IO
（
Chip pin: 37, 39, 44
）
2.7
3.3
3.6
V
V
IO
~ V
BAT
(differential)
（
Chip pin:
10, 54
）
0.0
V
Digital Inputs
/
-0.5
V
IO
+ 0.5
V
RF Pins
/
-0.5
2.1
V
Analog Pins (XTAL)
/
-0.5
2.1
V
Operating Temperature
/
-30
+25
+85
℃
Storage Temperature
/
-55
+25
+125
℃
3.2 Recommended Operating Conditions
Over operating free-air temperature range (unless otherwise noted)
(1) (2)
Table 5. Recommended Operating Conditions of RF-WM-3220B1 Series
Items
Condition
(3) (4)
Min.
Typ.
Max.
Unit
V
BAT
, V
IO
(shorted to V
BAT
) (Chip
Pin: 10, 37, 39, 44, 54)
Direct battery connection
2.1
3.3
3.6
V
Ambient Thermal Slew
/
-20
/
20
℃
Human Body Model
HBM
±2000
V
Moisture Sensitivity Level
2
Charged Device Model
±500
V
Notes
：
(1) When operating at an ambient temperature of over 75 °C, the transmit duty cycle must remain below 50% to avoid
the auto-protect feature of the power amplifier. If the auto-protect feature triggers, the device takes a maximum of 60
seconds to restart the transmission.
(2) To ensure WLAN performance, ripple on the 2.7 V to 3.3 V supply must be less than ±300 mV.
