TIDA-00374 vs TIDA-00484

Tony Waria

Other Parts Discussed in Thread: TIDA-00484, TIDA-00374, TPL5111, TPL5110

The reference designs TIDA-00374 and TIDA-00484 utilize BLE and sub-1GHz radios, respectively. The 484 design also uses additional boost converter and different system timer and load switch chips. Does anyone know the reason for the different selections? It looks like 484 has improved battery life and stability.

Thanks,

Tony

over 8 years ago

0 RachelP over 8 years ago

TI__Genius 12815 points

Hi Tony,

I've moved this question to the TI Designs Forum since your questions seem better suited to this forum.

0 clam over 8 years ago

TI__Expert 8785 points

Tony,

TIDA-00374 was developed first. From testing TIDA-00374, we found additional ways to improve battery life, so we applied it to TIDA-00484.

For example, the HDC device has a higher operating voltage (3.0V typical) compared to the wireless device (1.8V to 3.8V). When the coin cell battery voltage will go lower than the HDC operating range, the HDC will stop working. Therefore, a boost converter was added to regulate the coin cell voltage back to 3V, so more of the coin cell battery capacity can be used.

For system timer, the only difference between TPL5110 (on TIDA-00374) and TPL5111 (on TIDA-00484) is the polarity of the DRV pin. This is mainly to show there are two different system timers and either one can be used. The device you use in your final application depends on whether you want DRV pin to be active high or active low.

For load switch, the one on TIDA-00484 has a lower on resistance than the one on TIDA-00374.

--Christina