Part Number:CC2640
Hello Experts,
I have tested current consumption of BLE Tag (CC2640 based) using Oscilloscope and observed current consumption and transmission time (please see table below)
| CC2640 BLE Tag | ||
| Power (db) | Instantaneous average current during transmission time (mA) | Transmission Time (ms) |
| 5 | 2.54 | 6.09 |
| 0 | 1.72 | 6.12 |
| -3 | 1.45 | 6.04 |
| -9 | 1.17 | 6.07 |
| -12 | 1.13 | 6.07 |
| -15 | 1.09 | 6.07 |
| -18 | 1.06 | 6.07 |
| -21 | 1.01 | 6.07 |
Advertisement time: 24 Hours
Battery Capacity:4800 mAh
Transmission Interval : 200 msec
On the above calculation basis i calculated the Tag battery life as follows
| Power (dB) | Battery Life |
| 5 dB | 5 years 1 months |
| 0 dB | 6 years 8 months |
| -3 dB | 7 years 6 months |
Please see the calculation below, I want to ask if the calculation is correct, please let me know if i miss anything in calculation
| Battery Life Calculator | |
| Select transmission power (dB) | 0 dB |
| Instantaneous current durring transmission time (mA) | 1.72 mA |
| transmission time (ms) | 6.12 ms |
| Transmission interval (ms) | 200 ms |
| Average current draw accounting for sleep [mA] | 0.08152926 mA |
| Battery Capacity (mAh) | 4800 mAh |
| Battery Life (years) | 6 years 8 months |
Regards,
Sumair