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The difference between Bluetooth 4.0 chip NRF51802 and NRF51822

sohu | 13/05/2021
There is no difference in FLASH RAM capacity between NRF51822-QFAA and NRF51802-QFAA, and the two can be used directly instead;

The difference is that:

a. The receiving sensitivity of 51802 is -91dBm; 51822 is -93dBm. This difference leads to a difference in receiving distance;

b, Tx Power @ power saving mode 51822 is -35dBm, 51802 is -30dBm; this causes the power consumption of the chip to be different; 51822 has lower power consumption

c, OdBm @DC/DC power supply: 51822 emission current 9.7mA, 51802 emission current 10mA, the same emission power consumes different currents, 51822 is more power-saving;

d, the use of internal wake-up time is different, 51822 wake-up time is 4.4uS, and 51802 wake-up time is 7.7uS,

e. In IDLE mode, the current of 51822 is 2.6uA, and the current of 51802 is 3.0uA. The standby current is different

Comparison of pin diagrams: (the pins of the two are the same)

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NRF51802

NRF51822

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