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TDC1000 TOF measurement

Bojan Lazarevski
Prodigy 10 points
Other Parts Discussed in Thread: TDC1000-Q1, TDC1000

I want to use TDC1000-Q1 for fluid level measurment, with piezo SMD10T2R111 that is glued on the bottom of a plastic reservoir. I am experiencing some problems, as it is always sending a stop impulse after 14us, no matter what the height of the water in the tank is. I could really use some instructions and help on solving this problem.

  • 0
    TI__Expert 4725 points

    Bojan,

    Could you please share what your application is?

    How is the transducer mounted?  Please refer to the following applications note  about transducer mounting procedures. (www.ti.com/.../snaa266)

    Please refer to the following applications note about configuring the TDC1000 for level monitoring  (www.ti.com/.../snaa270).

    Make sure to pay attention to the section on "ringdown".

    You can try the following file as its configured for level applications. 

    Best regards,

    Fullscreen TDC1000_7200_level_saleskit_reg.txt Download 
    TDC1000_Config0                         43
TDC1000_Config1                         41
TDC1000_Config2                         00
TDC1000_Config3                         04
TDC1000_Config4                         5F
TDC1000_TOF-1                           03
TDC1000_TOF-0                           FF
TDC1000_Error_Flags                     00
TDC1000_Timeout                         23
TDC1000_Clock_Rate                      00
TDC1000_Conts_Trigger                   01
TDC7200_Config1                         02
TDC7200_Config2                         40
TDC7200_Interrupt_Status                07
TDC7200_Interrupt_Mask                  07
TDC7200_Coarse_Cntr_Ov_H                FF
TDC7200_Coarse_Cntr_Ov_L                FF
TDC7200_Clock_Cntr_Ov_H                 FF
TDC7200_Clock_Cntr_Ov_L                 FF
TDC7200_Clock_Cntr_Stop_Mask_H          00
TDC7200_Clock_Cntr_Stop_Mask_L          00
TRIGGER_UPDATE_FREQ                     0004
TDC_AVG/STDEV_NUM_ELEMS                 0032
SAVE_GRAPH_DATA_TO_FILE                 00
FLOW_MODE_SELECT                        00
Y-SCALE_CENTER                          0000
X-SCALE_RANGE                           0032
MEASURE_RTD1                            00
SAVE_RESULT_REGR_TO_FILE                00
GRAPH_MULTI_STOPS                       00
TDC_SELECT                              00
TEMP_RTD_SELECT                         00
TEMP_RTD_MODE                           01
TEMP_AVG/STDEV_NUM_ELEMS                000A
SAVE_TEMP_DATA                          00
GRAPH_YMAX_DATA                         0000000000029810
GRAPH_YMIN_DATA                         0000000000004E20
TDC1000-HV_DRV_EN1                      00
TDC1000-HV_DRV_EN2                      00
HV_DRV_EN1_Period                       001E
HV_DRV_EN2_Period                       001E
ENABLE_POWER_CYCLE                      00
CLK_FREQ_(1-16MHz)                      8.000000
CLK_SOURCE_SEL                          00
CPU_CLK_FREQ                            05
CPU_CLK_EN                              00
TDC1000-HV_BST_PWR_EN                   00
HV_BST_PWR_EN_Period                    000F
FWD2REV_FLOW_DELAY                      0000
TDC1000-IMPE_MATCH_EN                   00