SD16_A electric current consumption

Other Parts Discussed in Thread: MSP430F47176

I am checking the electric current consumption. I connected the Ammeter in sequence of the GND of MSP430 to the GND of power generator (KX-100L) to know how much the MSP consumes.

I am interested in the current consumption while MSP uses ADC module (SD16_A). The current I measures was around 2.2mA (2200 microA).

Is this typical current consumption while using ADC ISR continuously? Or are there any way to reduce this consumption less than 1.1mA?

I also appreciate if someone suggest me which part I should refer in the User's Guide. I use MSP430F47176.

The bottom is the code I use for measuring the ADC ISR current consumption.

By the way, the current consumption of MSP430 LPM3 mode was 0.05mA. I think I do not make large mistake in the connection of Ammeter.

======================================================

#include  <msp430x471x6.h>

void main(void)
{
    volatile unsigned int i;
   
    WDTCTL = WDTPW+WDTHOLD;                  
       
    FLL_CTL0 |= XCAP14PF;                     
   
    do
    {
        IFG1 &= ~OFIFG;                        
        for (i = 0x47FF; i > 0; i--);           
    }
    while ((IFG1 & OFIFG));                  
    SD16CTL = SD16REFON;
   
    for (i = 0; i < 10000; i++);             
   
    FLL_CTL0 |= XCAP14PF;                  
    for (i = 0; i < 10000; i++);             

    SD16CTL = SD16REFON + SD16SSEL0;            
    SD16CCTL0 |= SD16GRP + SD16OSR_128;                    
    SD16CCTL1 |= SD16GRP;                     
    SD16CCTL2 |= SD16GRP;                     
    SD16CCTL3 |= SD16GRP;                     
    SD16CCTL4 |= SD16GRP;                     
    SD16CCTL5 |= SD16SNGL;                     
   
    SD16INCTL0 = SD16INTDLY_0;    

    for (i = 0; i < 0x3600; i++);             

    do
    {
        IFG1 &= ~OFIFG;                         
        for (i = 0x47FF; i > 0; i--);           
    }
    while ((IFG1 & OFIFG));                  
   
    SD16CCTL5 |= SD16SC;             
    SD16CCTL5 |= SD16IE; 
           
    while(1) {
        _BIS_SR(LPM3_bits + GIE);        
    }   
}

#pragma vector=SD16A_VECTOR
__interrupt void SD16ISR(void)
{
   
    unsigned int tmp;
                
    switch (SD16IV)
    {
    case 2:                                   
        break;
    case 4:                                      
      break;
    case 6:                                   
      break;
    case 8:                                   
      break;
    case 10:                                  
      break;
    case 12:                                  
      break;
    case 14:                                        
        tmp = SD16MEM0; // dummy reading
        tmp = SD16MEM1;             
        tmp = SD16MEM2;
        tmp = SD16MEM3;
        tmp = SD16MEM4;
        tmp = SD16MEM5;

        SD16CCTL5 |= SD16SC;                   
        break;
    }
    __bic_SR_register_on_exit(LPM3_bits);
   
}