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TLV4021 Folha de dados(PDF) 21 Page - Texas Instruments |
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TLV4021 Folha de dados(HTML) 21 Page - Texas Instruments |
21 / 38 page VMON IN OUT V+ s5 Supply VPULLUP RPULLUP (up to 5.5V) VMON Supply IN OUT V+ s5 REF TLV40x1 21 TLV4021, TLV4031, TLV4041, TLV4051 www.ti.com SNVSB04B – MARCH 2019 – REVISED JUNE 2020 Product Folder Links: TLV4021 TLV4031 TLV4041 TLV4051 Submit Documentation Feedback Copyright © 2019–2020, Texas Instruments Incorporated Application Information (continued) 8.1.2 Monitoring a Voltage Other than (V+) Some applications monitor rails other than the one that is powering the comparator. In these applications the resistor divider used to set the desired threshold is connected to the rail that is being monitored. Figure 42. Monitoring a Voltage Other than the Supply The TLV40x1Ry can monitor a voltage greater than the maximum (V+) with the use of an external resistor divider network. Likewise, the TLV40x1 can monitor voltages as low as the internal reference voltage (0.2 V, 0.5 V, or 1.2 V). The TLV40x1Ry also has the advantage of being able to monitor high impedance sources since the input bias current of the input (IN) is low. This provides an advantage over voltage supervisors that can only monitor the voltage rail that is powering them. Supervisors configured in this fashion have limitations in source impedance and minimum sensing voltage. 8.1.3 VPULLUP to a Voltage Other than (V+) For applications where the output of the comparator needs to interface with a reset/enable pin that operates from a different supply voltage, the open-drain comparators (TLV4021/4031) should be selected. In these usage cases, the output can be pulled up to any voltage that is lower than 5.5V (independent of (V+)). This technique is commonly referred to as "level-shifting." Figure 43. Level-Shifting |
Nº de peça semelhante - TLV4021_V03 |
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Descrição semelhante - TLV4021_V03 |
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