Data Sheet

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5. Electrical Specifications
5.3. Wi-Fi Radio Characteristics
The following data are from tests conducted at room temperature with 3.3V and 1.1V
power supplies.
📖 Notes:
① Modem-sleep mode is used in the applications that require the CPU to be working, as in PWM or
I2S applications. According to 802.11 standards (like U-APSD), it shuts down the Wi-Fi Modem
circuit while maintaining a Wi-Fi connection with no data transmission to optimize power
consumption. E.g. in DTIM3, maintaining a sleep of 300 ms with a wakeup of 3 ms cycle to
receive AP’s Beacon packages at interval requires about 15 mA current.
② During Light-sleep mode, the CPU may be suspended in applications like Wi-Fi switch. Without
data transmission, the Wi-Fi Modem circuit can be turned off and CPU suspended to save power
consumption according to the 802.11 standards (U-APSD). E.g. in DTIM3, maintaining a sleep of
300 ms with a wakeup of 3ms to receive AP’s Beacon packages at interval requires about 0.9 mA
current.
③ During Deep-sleep mode, Wi-Fi is turned off. For applications with long time lags between data
transmission, e.g. a temperature sensor that detects the temperature every 100s, sleeps for 300s
and wakes up to connect to the AP (taking about 0.3 ~ 1s), the overall average current is less
than 1mA. The current of 20 μA is acquired at the voltage of 2.5V.
Table 5-3. Wi-Fi Radio Characteristics
Parameters
Min
Typical
Max
Unit
Input frequency
2412
-
2484
MHz
Output impedance
-
39+j6
-
Ω
Input reflection
-
-
-10
dB
Output power of PA for 72.2 Mbps
15.5
16.5
17.5
dBm
Output power of PA for 11b mode
19.5
20.5
21.5
dBm
Sensitivity
DSSS, 1 Mbps
-
-98
-
dBm
CCK, 11 Mbps
-
-91
-
dBm
6 Mbps (1/2 BPSK)
-
-93
-
dBm
54 Mbps (3/4 64-QAM)
-
-75
-
dBm
HT20, MCS7 (65 Mbps, 72.2 Mbps)
-
-72
-
dBm
Adjacent Channel Rejection
OFDM, 6 Mbps
-
37
-
dB
OFDM, 54 Mbps
-
21
-
dB
HT20, MCS0
-
37
-
dB
HT20, MCS7
-
20
-
dB
Espressif
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2017.04