/blogs_/archives/b/precisionhub/posts/how-to-design-cost-sensitive-battery-monitoring-circuitsIn portable electronics designs, typical battery-monitoring systems measure battery voltage and battery current to detect when the battery needs charging or replacement. In this post, I&rsquo;ll demonstrate battery-voltage and current-monitoring circ...en-USTelligent Community 13https://e2e.ti.com/blogs_/archives/b/precisionhub/posts/how-to-design-cost-sensitive-battery-monitoring-circuitsWed, 03 Aug 2016 19:22:07 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2bd1a109-0334-46a1-bd51-4cb93a035816Collin Wells0<p>Hi Alex, &nbsp;If the input of your ADC includes a high input impedance buffer, then you do not need the op amp. &nbsp;However, most microcontroller ADC inputs are not buffered and the input current to the ADC will cause errors in the voltage divider. &nbsp;Adding a large capacitor at the input of the ADC will help provide transient currents, but will also negatively affect start-up time and transient response when combining with the large resistances used to limit the current. &nbsp;</p> <img src="https://e2e.ti.com/aggbug?PostID=668807&AppID=930&AppType=Weblog&ContentType=0" width="1" height="1">https://e2e.ti.com/blogs_/archives/b/precisionhub/posts/how-to-design-cost-sensitive-battery-monitoring-circuitsWed, 03 Aug 2016 12:01:16 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2bd1a109-0334-46a1-bd51-4cb93a035816Alexey Bagaev0<p>What is the purpose of Op-Amp in a Voltage Metering? Can&#39;t we simply put voltage data from resistor divider directly to ADC?</p> <img src="https://e2e.ti.com/aggbug?PostID=668807&AppID=930&AppType=Weblog&ContentType=0" width="1" height="1">