TI公司的TPS3860x0系列是四路電壓監(jiān)視器,具有可編程延遲(1.4ms到10s)和看門狗定時器,監(jiān)視電壓大于0.4V,閾值精度0.25%,非常低的靜態(tài)電流(12uA),主要用在模擬加序,所有的DSP和MCU應用,所有的FPGA/ASIC應用.本文介紹了TPS3860x0系列主要特性,方框圖,典型應用電路,以及TPS386000和TPS386040的評估模塊主要特性,電路圖和所用材料清單.QuadSupplyVoltageSupervisorswithProgrammableDelayandWatchdogTimerTheTPS3860x0familyofvoltagesup
TI公司的TPS3860x0
系列是四路電壓監(jiān)視器,具有可編程延遲(1.4
ms到10s)和看門狗
定時器, 監(jiān)視電壓大于0.4V,閾值精度0.25%,非常低的靜態(tài)
電流(
12uA),主要用在模擬加序,所有的
DSP和
MCU應用, 所有的FPGA/
ASIC應用.本文介紹了TPS3860x0系列主要特性,方框圖, 典型應用電路,以及TPS386000 和TPS3860
40的評估
模塊主要特性,電路圖和所用材料清單.
Quad Supply Voltage Supervisors with Programmable Delay and Watchdog Timer
The TPS3860x0 family of voltage supervisors can m
onitor four power rails that are greater than 0.4V with a 0.25% (
typical) threshold accuracy. Each of the four supervisory circuits (
SVS-n) assert a RE
SETn or RESETn output signal when the SENSEm input voltage drops below the programmed threshold. With external resistors, the threshold of each SVS-n can be programmed (where n = 1, 2, 3, 4 and m = 1, 2, 3, 4L, 4H).
Each SVS-n has a programmable delay before releasing RESETn or RESETn, and the delay time can be set from 1.4ms to 10s through the CTn
pinconnection. Only SVS-1 has an active-low manual reset (MR) input; a logic-low input to MR asserts RESET1 or RESET1.
SVS-4 monitors the threshold window using two comparators. The extra comparator can be configured as a fifth SVS to monitor negative voltage with voltage reference output VREF.
The TPS3860x0 has a very low quiescent current of 12&
amp;mciro;A (typical) and is available in a small, 4mm x 4mm, QFN-20 package.
