MAX11068
Key Features
- This highly integrated battery sensor incorporates a simple state machine and a high-speed I2C bus for SMBusK-laddered serial munication
- The MAX11068 analog front-end bines a 12-channel voltage measurement data-acquisition system with a highvoltage switch bank input
- All measurements are done differentially across each cell
- The full-scale measurement range is from 0 to 5.0V, with full stated accuracy guaranteed from 0.5V to 4.7V
- The input mux/switch bank allows for differential measurement of each cell in a series stack
- A high-speed, 12-bit successive approximation (SAR) A/D converter is used to digitize the cell voltages
- All 12 cells can be measured in less than 107Fs
- The MAX11068 uses a two-scan approach for collecting cell measurements and correcting them for errors
- The first phase of the scan is the acquisition phase where the voltages of all 12 cells are acquired
- The second phase is the error-cancellation phase where the ADC input is chopped to remove errors
