SBOSA86 March 2023 INA310A , INA310B
PRODUCTION DATA
The INA310x comparator input has a built-in circuit to protect the input devices in case of large input differential voltage. This circuit results in the input bias current (IBCMPIN) curve against input voltage (VCMPIN) as shown in Figure 7-3. The IBCMPIN reduces with VCMPIN from 0 V to 0.4 V, IBCMPIN is under 20 nA at 25°C for VCMPIN range from 0.4 V to 1.2 V, and IBCMPIN increases with VCMPIN from 1.8 V to 5.5 V. The nature of IBCMPIN does not contribute to the inaccuracy of the comparator alert threshold voltage (VTHRESHOLD) significantly because the IBCMPIN goes below 20 nA when the input voltage is close to the threshold voltage (0.6 V). Avoid using a high-value resistor for the divider network for better VTHRESHOLD accuracy. The sum of the two resistors in the divider network as shown in Section 7.4.1.1 is recommended to keep lower than 100 kΩ.