Dear all,
I have a VERY power critical application where I use a LDC1614 ( possibly 1612 is sufficient ). I "only" need 100 measured values per second.
What is the best way do do that as power - efficient as possible ?
- Put LDC to "sleep" via config register in the "pauses " ?
- Use the SD pin to power down the entire thing? But Startup time is so long ( 2msec + register setup time ) that likely the "sleep" approach overall is more efficient.
- Can I just halt the clock input to save power ?
- Any advice for a low power clock source ? The usual crystal oscillators in the 20MHz-ish range all consume 7-9 milliwatts which is way too much. Using a 32kHz Xtal and a PLL ?
- Does the LDC power consumption scale with clock frequency ? Thus, does it save power to use the lowest possible clock frequency and set the clock dividers to 1 ?
- Is there a "single shot" mode to just do one measurement ?
- Is the I2C interface power requirement significantly depended on I2C speed ? ( I assume not, therefore faster is more efficient.. )
Thanks,
Wolfgang