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INA190 数据表(PDF) 9 Page - Texas Instruments |
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INA190 数据表(HTML) 9 Page - Texas Instruments |
9 / 20 page ADC RSENSE LOAD Microcontroller Bus Voltage1 ±0.1 V to +40 V ENABLE VS OUT REF GND IN+ IN± RSENSE LOAD 0.1 F Supply Voltage 1.7 V to 5.5 V Bus Voltage2 ±0.1 V to +40 V GPIO1 GPIO2 ENABLE VS OUT REF GND IN+ IN± 0.1 F Supply Voltage 1.7 V to 5.5 V INA190 INA190 Copyright © 2017, Texas Instruments Incorporated 9 INA190 www.ti.com SBOS863 – MARCH 2018 Product Folder Links: INA190 Submit Documentation Feedback Copyright © 2018, Texas Instruments Incorporated 7.4 Device Functional Modes 7.4.1 Normal Operation The INA190 is in normal operation when the following conditions are met: • The power-supply voltage (VVS) is between 1.7 V and 5.5 V. • The common-mode voltage (VCM) is within the specified range of –0.1 V to +40 V. • The maximum differential input signal times the gain plus VREF is less than VVS minus the output voltage swing to VVS. • The minimum differential input signal times the gain plus VREF is greater than the swing to GND (see the Rail- to-Rail Output Swing section). During normal operation, this device produces an output voltage that is the gained-up representation of the difference voltage from IN+ to IN– plus the reference voltage at VREF. 7.4.2 Shutdown The INA190 features an active high ENABLE pin that when pulled to a logic low signal shuts down the device. When shut down, the quiescent current is reduced to 10 nA (typ), and the output goes to a high-impedance state. The low quiescent current extends the battery lifetime when the current measurement is not needed. When the ENABLE pin is driven to a logic-high level, the device turns back on. The typical output setting time when enabled is 130 µs. The output of the INA190 goes to a high-impedance state when disabled; therefore, it is possible to connect multiple outputs of the INA190 together to a single ADC or measurement device, as shown in Figure 2. Figure 2. Multiplexing Multiple Devices With the ENABLE Pin When connected in this way, enable only one INA190 at a time and both devices must have the same supply voltage. |
类似零件编号 - INA190 |
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类似说明 - INA190 |
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