AD8280WASTZ Analog Devices Inc, AD8280WASTZ Datasheet
AD8280WASTZ
Specifications of AD8280WASTZ
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AD8280WASTZ Summary of contents
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FEATURES Wide supply voltage range: 6 30.0 V Multiple inputs can monitor cell voltages and 2 temperatures Adjustable threshold levels: overvoltage, undervoltage, overtemperature Alarm options: separate or shared alarms Extended temperature range performance −40°C ≤ ...
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AD8280 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Pin ...
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SPECIFICATIONS VTOP = 7 −40°C to +105°C, unless otherwise noted. A Table 1. Parameter TRIP POINT ERRORS Undervoltage Trip Point Error Overvoltage Trip Point Error Overtemperature Trip Point Error Hysteresis for Overvoltage, Undervoltage, and ...
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AD8280 Parameter Self-Test Completion Time Self-Test Valid Time, t STV Delay Time for Self-Test Start Delay Time for Data Valid Rise Time for Self-Test Pulse POWER SUPPLY Supply Voltage Range Quiescent Current ...
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ABSOLUTE MAXIMUM RATINGS Table 2. Parameter VTOP to VBOTx VIN0 to VBOTx VIN1 Through VIN6 Voltage to VBOTx VTx to VBOTx TESTI, ENBI to GNDx DGTx, SELx, NPTC to GNDx AVOUTxx to GNDx TOP, BOT to VBOTx Stresses above those ...
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AD8280 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VBOT2 VBOT2S VBOT1S VBOT1 VIN0 VIN1 VIN2 VIN3 VIN4 VIN5 VIN6 VTOP Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 VBOT2 Lowest Potential of Six-Cell Stack. 2 VBOT2S Lowest Potential of Six-Cell ...
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Pin No. Mnemonic Description 28 SEL1 Digital Select Pin 1. Used with SEL0 to select channels to be used (see Table 5). 29 SEL0 Digital Select Pin 0. Used with SEL1 to select channels to be used (see Table 5). ...
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AD8280 TYPICAL PERFORMANCE CHARACTERISTICS SAMPLE SIZE = 2726 1800 1500 UNDERVOLTAGE OVERVOLTAGE 1200 900 600 300 0 –30 –20 –10 0 TRIP POINT ERROR (mV) Figure 3. Overvoltage and Undervoltage Trip Point Error, Voltage Between VIN0 and VIN1 1600 SAMPLE ...
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SAMPLE SIZE = 2726 250 200 150 100 50 0 –5 –4 –3 –2 TRIP POINT ERROR (mV) Figure 9. Overtemperature Trip Point Error 240 SAMPLE SIZE = 2726 210 180 150 120 ...
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AD8280 25 VOLTAGE BETWEEN VIN1 TO VIN2 AND VIN5 TO VIN6 –5 –10 –15 –20 –25 –50 –30 – TEMPERATURE (°C) Figure 15. Overvoltage Error vs. Temperature 25 VOLTAGE BETWEEN 20 15 ...
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VOLTAGE BETWEEN 5 0 –5 –10 – STACK VOLTAGE (V) Figure 21. Overvoltage Trip Point Error vs. Stack Voltage (VIN6 – VIN0 VOLTAGE BETWEEN –5 –10 –15 –20 – ...
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AD8280 5.5 LDO 5.0 REF 4.5 4.0 3.5 3.0 2 SOURCE CURRENT (mA) Figure 27. LDO and Reference Voltage vs. LDO Source Current, Stack Voltage = 18 LDO REF ...
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OV 1 20ns/DIV Figure 33. Alarm Fall Time TESTI 4 20ms/DIV Figure 34. TESTI and AVOUTxx, Deglitch Time = 0.0 sec, Self-Test Passes TESTI 4 20ms/DIV Figure 35. ...
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AD8280 TESTI 400ms/DIV Figure 39. Alarm Condition Entering Self-Test, Part Passes Self-Test TESTI 4µs/DIV Figure 40. Alarm Condition Entering Self-Test, Part Passes Self-Test (Enlarged) 1 ENBI ...
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THEORY OF OPERATION Figure 44 shows a block diagram of the AD8280. The AD8280 is a threshold monitor that can be used to monitor up to six cell voltages and two temperature voltages. The part can also be used in ...
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AD8280 APPLICATIONS INFORMATION TYPICAL CONNECTIONS Figure block diagram of the AD8280 typical connections. CELL INPUTS The battery stack of six cells should be connected to VIN0 through VIN6, with the highest potential connected to VIN6 and the ...
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Also, if the resistor (R ) used in the top of the thermistor TOP bridge circuit is less than 10 kΩ, another resistor (R added in series to the input to the VTx pin (see Figure 46). The two resistors ...
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AD8280 TOP AND BOTTOM PART DESIGNATION When configured in a daisy chain, the AD8280 operates differ- ently, depending on where the chain: top part (highest potential), middle part, or bottom part (lowest potential). The TOP and BOT ...
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VTOPx 10kΩ 10nF VIN6 + VIN5 + VIN4 + NTC VIN3 + VIN2 + VIN1 + T2 VIN0 VT1 VT2 VBOTx VTOPx VIN6 + VIN5 + VIN4 + VIN3 + VIN2 ...
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AD8280 ENABLING AND DISABLING THE AD8280 The AD8280 can be disabled or put into a standby mode by bringing the ENBI pin to logic low, lowering the quiescent current of the AD8280 from a maximum of 2 1.0 ...
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NORMAL OPERATION UNALARMED AIOUTxx/AVOUTxx ALARMED AIOUTxx/AVOUTxx DURING SELF-TEST MODE TESTI AIOUTxx/AVOUTxx TEST OK AIOUTxx/AVOUTxx TEST FAILS AIOUTxx/AVOUTxx ALARMED TEST OK Self-Test and Alarm Conditions If an alarm occurs just prior to or just after the self-test pulse is initiated, the ...
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AD8280 1 TESTI 0 1 AVOUTxx SELF-TEST PASS 0 1 AVOUTxx SELF-TEST FAIL TESTI 0 1 AVOUTxx SELF-TEST PASS 0 1 AVOUTxx t SELF-TEST FAIL RE 0 NOTES THE TIME FROM THE RISING ...
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PROTECTION COMPONENTS AND PULL-UP/ PULL-DOWN RESISTORS As shown in Figure 45, several devices are added to provide protection in a high voltage environment. Zener Diode Z1 ensures that the six-cell stack voltage does not significantly exceed the maximum 30 V ...
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... COPLANARITY BSC LEAD PITCH COMPLIANT TO JEDEC STANDARDS MS-026-BBC Figure 53. 48-Lead Low Profile Quad Flat Package [LQFP] (ST-48) Dimensions shown in millimeters Package Description 48-Lead LQFP 48-Lead LQFP Evaluation Board with Two AD8280WASTZ Devices D08911-0-7/10(A) Rev Page 9.20 9. PIN 1 7.20 TOP VIEW 7 ...