{"product_id":"current-sense-amplifier-with-dual-over-current-level-monitor-alert-output-1","title":"Current-Sense Amplifier with Dual Over Current Level Monitor \u0026 Alert Output","description":"\u003cp\u003eThis Module is a high common-mode \u003cstrong\u003ecurrent sense amplifier\u003c\/strong\u003e with two high-speed comparators to detect out-of-range current conditions. The comparators are configured to detect and respond to dual over current conditions. These devices feature an adjustable limit threshold range for each comparator set using an external limit-setting resistor. Limit 1 Resistor is R10 and Limit 2 Resistor is R11. The board measures differential voltage signals on common-mode voltages that can vary from \u003cstrong\u003e0 V up to +36 V\u003c\/strong\u003e, independent of the supply.\u003c\/p\u003e\n\u003cp\u003eThe project is built using\u003cstrong\u003e an INA302A1 \u003c\/strong\u003echip which has a gain of \u003cstrong\u003e20V\/V\u003c\/strong\u003e. The board can also be used with \u003cstrong\u003eINA302A2\u003c\/strong\u003e which has a gain of \u003cstrong\u003e50V\/V\u003c\/strong\u003e or \u003cstrong\u003eINA302A3\u003c\/strong\u003e with a gain of \u003cstrong\u003e100V\/V\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe open-drain alert outputs are configured to operate in either a transparent mode (output status follows the input state) or in a latched mode (alert output is cleared when the latch is reset). Jumpers J1 and J2 are provided to select this option. The alert response time for comparator 1 is under \u003cstrong\u003e1 µs\u003c\/strong\u003e, and the alert response for comparator 2 is set through an external capacitor ranging from \u003cstrong\u003e2 µs to 10 s\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLimit 1 = R10\u003c\/li\u003e\n\u003cli\u003eLimit 2 = R11\u003c\/li\u003e\n\u003cli\u003eCurrent Measurements Range (By changing Shunt resistor Value) or Chip INA302A1, INA302A2, INA302A3\u003c\/li\u003e\n\u003cli\u003eDelay Time for Alert 1 and Alert 2 using resistor R7 and C3\u003c\/li\u003e\n\u003cli\u003eBidirectional Current Sense, by applying a reference voltage to Pin 3 of CN2 or Installing Resistor R8 and R9\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupply 5V DC @ 20mA\u003c\/li\u003e\n\u003cli\u003eInput Signal Range 0 to 36V DC\u003c\/li\u003e\n\u003cli\u003eInput Current Range 0 to 2Amps\u003c\/li\u003e\n\u003cli\u003eAlert 1 and Alert 2 Dual Current Level TTL Outputs\u003c\/li\u003e\n\u003cli\u003eAlert 1 and Alert 2 Dual Current Level LED Indicator\u003c\/li\u003e\n\u003cli\u003eDelay Settings Between Alert 1 and Alert 2\u003c\/li\u003e\n\u003cli\u003eCurrent Sense Amplifier Voltage Output 0 to 4V\u003c\/li\u003e\n\u003cli\u003eLatch or Transparent Mode Selection Jumpers J1 and J2\u003c\/li\u003e\n\u003cli\u003eAlert2 LED On @ 200mA and Alert 1 LED On @ 2Amps Load\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 32.10 x 23.13 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConnector CN1\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePin1 + DC Input\u003c\/li\u003e\n\u003cli\u003ePin2 + DC Input\u003c\/li\u003e\n\u003cli\u003ePin3 GND\u003c\/li\u003e\n\u003cli\u003ePin4 GND\u003c\/li\u003e\n\u003cli\u003ePin5 Load +\u003c\/li\u003e\n\u003cli\u003ePin6 Load +\u003c\/li\u003e\n\u003cli\u003ePin7 GND\u003c\/li\u003e\n\u003cli\u003ePin8 GND\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConnector CN2\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePin1 VCC 5V Power Supply Input\u003c\/li\u003e\n\u003cli\u003ePin2 OP Current Sense Amplifier Voltage Output 0 to 4V\u003c\/li\u003e\n\u003cli\u003ePin3 Not in Use (Reference Voltage Input)\u003c\/li\u003e\n\u003cli\u003ePin4 Latch 2 No Use\u003c\/li\u003e\n\u003cli\u003ePin5 Latch 3 No Use\u003c\/li\u003e\n\u003cli\u003ePin6 Alert1 Normally High, Goes Low When Load Current = 2Amps\u003c\/li\u003e\n\u003cli\u003ePin7 Alert2 Normally High, Goes Low When Load Current = 200mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eLimit Inputs: – Limit 1 = R10, Limit 2 = R11\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe project includes onboard resistors that set the voltages at LIMIT1 and LIMIT2 to about 4 V and 400 mV, respectively.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLatch Inputs Latch 1 and Latch 2\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eJumpers J1 and J2 are provided to select the transparent mode or latched operation. Default transparent mode is selected, and latched operation can be enabled by closing Jumpers J1 and J2.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAmplifier Output (0 to 4V)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe output of the internal current sense amplifier is accessible through the VOUT (OP) Pin 2 of connector CN2\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eALERT1 and ALERT2 Outputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ALERT1 and ALERT2 pins are accessible through the Pin6 and Pin 7 of Connector CN2 labeled ALR1 and ALR2, respectively. For gross testing, users can also monitor the states of the ALERT pins using the corresponding LED-D1 and LED-D2 indicators provided on the PCB.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSignal Inputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInput Signal Range 0 to 36V and Current sensing Range 2Amps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDelay Input\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe DELAY pin of the INA302A1 is a high-impedance node and highly susceptible to noise pickup. For this reason, all routing to the DELAY pin has been kept as short as possible. Resistor R7 and C3 allow users to control the propagation delay of the ALERT2 signal. C3 is intended for installing a load capacitor to GND. Note that the ALERT2 delay increases with load capacitance on the DELAY pin, R7 is a pull-up load resistor to VCC and helps minimize the ALERT2 delay. Installing a 50-kΩ to 100-kΩ resistor at R7 is recommended for minimal delay. Using values below 50 kΩ increases the supply current without yielding any significant reduction in the ALERT2 delay.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47249464754348,"sku":"S145","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/S145.jpg?v=1789906072","url":"https:\/\/dotfry.com\/products\/current-sense-amplifier-with-dual-over-current-level-monitor-alert-output-1","provider":"dotfry","version":"1.0","type":"link"}