Data Sheet

LC840PA
Datasheet
https://www.lairdconnect.com
22
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4 POWER CONSUMPTION
Data at VDD of 3.3 V with internal (to chipset) LDO ON or with internal (to chipset) DCDC ON (see Power Consumption
Note 1) and 25ºC.
4.1 Power Consumption
Table 9: Power consumption
Parameter
Min
Typ
Max
Unit
Active mode ‘peak’ current (Note 1)
(Advertising or Connection)
Tx only run peak current @ Txpwr = +18 dBm
Tx only run peak current @ Txpwr = +14 dBm
Tx only run peak current @ Txpwr = 6 dBm
Tx only run peak current @ Txpwr = 0 dBm
Tx only run peak current @ Txpwr = -6 dBm
Tx only run peak current @ Txpwr = -26 dBm
With DCDC [with LDO]
102.2 [112.7]
65.9 [77.0]
37.2 [44.4]
25.5 [30.5]
21.2 [25.3]
18.5 [21.8]
mA
mA
mA
mA
mA
mA
Active Mode
Rx only ‘peak’ current, Bluetooth LE 1 Mbps (Note 1)
10.9 [17.3]
mA
Ultra-Low Power Mode 1 (Note 2)
Standby Doze /System ON Idle, 256 k RAM retention
5.9
uA
Ultra-Low Power Mode 2 (Note 3)
Deep Sleep /System OFF (no RAM retention)
2.0
uA
Active Mode Average current (Note 4)
Advertising Average Current draw
Max, with advertising interval (min) 20 mS
Min, with advertising interval (max) 10240 mS
Connection Average Current draw
Max, with connection interval (min) 7.5 mS
Min, with connection interval (max) 4000 mS
Note4
Note4
Note4
Note4
uA
uA
uA
uA
Power Consumption Notes:
Note 1
This is for Peak Radio Current only, but there is additional current due to the MCU. The Normal Voltage mode
internal REG1 DCDC convertor or LDO is decided by the underlying Bluetooth LE stack.
Note 2
LC840PA modules Standby Doze (System ON Idle) is 5.9uA typical. When using smartBASIC firmware, Standby
Doze is entered automatically (when a waitevent statement is encountered within a smartBASIC application
script). In Standby Doze, all peripherals that are enabled stay on and may re-awaken the chip. Depending on
active peripherals, current consumption ranges from 5.9 μA to 370 uA (when UART is ON). See individual
peripherals current consumption data in the Peripheral Block Current Consumption section. smartBASIC firmware
has functionality to detect GPIO change with no current consumption cost, it is possible to close the UART and
get to the 5.9 uA current consumption regime and still be able to detect for incoming data and be woken up so
that the UART can be re-opened at expense of losing that first character.
The LC840PA Standby Doze current consists of the below nRF52840 blocks:
▪ nRF52 System ON IDLE current (no RAM retention) (0.97 uA) – This is the base current of the CPU