CC2642R: DAC consumption

I am expecting low current consumption after DAC_close() but no luck.

Voltage reference source set with sysconfig to VDDS. Output pin is not connected to any external.

Here is my sample code:

    static DAC_Handle         dacHandle0;
    DAC_Params             dacParams;

    DAC_init();

    DAC_Params_init(&dacParams);
    Task_sleep(15000 * (1000/Clock_tickPeriod));
    //Current = Approx. 6 microAmps

    while(1){

    dacHandle0 = DAC_open(CONFIG_DAC_PRESSURE_REF, &dacParams);
    DAC_enable(dacHandle0);

    DAC_setVoltage(dacHandle0, 500000);

    Task_sleep(10000 * (1000/Clock_tickPeriod));
    //Current = Approx. 650 microAmps

    DAC_disable(dacHandle0);
    DAC_close(dacHandle0);
    Task_sleep(10000 * (1000/Clock_tickPeriod));
    // Current = Approx. 550 microAmps. Why not 6 microAmps? Any suggestions to find out?

    }