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INA4180-Q1: If spec match DRV8718 current sensor amplifier.

Hale Tan
Expert 3390 points
Part Number: INA4180-Q1
Other Parts Discussed in Thread: INA4180, INA2180

Hi team,

I want to make sure if INA4180 can meet the spec requirements of DRV8718 current sensor amplifier as below. The customer want to find 2/4 channel auto current sensor amplifier. We propose this device and could you provide related schematic design and PCB layout with us?

  • 0
    TI__Mastermind 32025 points

    Hey Hale,

    Here is my comparison of the INAx180 and the DRV8718's internal current sense amplifier. Note the only thing that is not a direct value from the datasheet is the VLINEAR specification. Technically the only thing that is not the same value from INAx180 datasheet is the test condition of the gain error specification, which is from 0.5V to Vs-0.5V; however, this is very conservative test range and I always suggest that linearity can be achieved from Vout = 0.2V to 4.8V.

    DRV INA2180
    Spec TC Min Max Typ Min Max typ
    Vcom range   -2 Vdd+2   0 26  
    Gain 00b 9.75 10.25 10      
    01B 19.5 20.5 20 19.8 20.2 20
    10B 39 41 40 49.5 50.5 50
    11B 78 82 80 99 101 100
    tSET 10x     2.2us ~2-3us
    20x    
    40x    
    80x     3us
    tSLEW       2.5V/us 2V/us
    VLINEAR   0.25 Vref-0.25   0.2 Vs-0.2  
    VOFF=Vosi Vcm=0  +/-1mV    -0.15mV  +0.15mV 25uV
    VOFF_D=Vos_drift Vcm=0  +/-25uV/C 10uV/C  +/-1uV/C 0.2uV/C
    IBIAS Vcm=0   100uA       0.1uA
    Vcm=5V           50uA
    IBIAS_OFF    +/-1uA        +/-0.05uA
    CMRR 125C 72dB   90dB 84dB   100dB
    150C 69dB   90dB      
    20kHz     80dB     90dB
    PSRR DC     100dB 87.9588   101.9382
    20kHz     90dB     75dB
    400kHz     70dB     25dB

    DRV8718vsINA2180.xlsx

    Sincerely,

    Peter