Component level Testing of ADS7841 serial adc

Hello Sameers,

Figure (3) on p10 shows one typical way to trigger conversion on the device using 24 CLKs per conversion.  The first eight clock cycles are for the command byte.   After this, the device enters conversion mode.  The next 12 clocks perform the conversion, and the LSB is read on the 13th clock after the command byte.    The control bits in the control byte (to select channel and mode of operation) are defined on page 11.   Table VI and VII define the required timing.   Please let me know if you have questions.

Thank you and Best Regards,

Luis

Hello Sameera,

You will need to interface the ADC with a controller (i.e. DSP TMS320Cxxxx processor, MSP430 microcontroller,etc) or a digital I/O card of your choice.  Unfortunately, the ADS7841 is an older device; and there is no kit available that you can readily interface with your PC.

Alternatively, you could also consider other devices that have evaluation kits readily available.  Depending on your input range/configuration, and sampling rate requirements you could consider other devices:

ADS7953 (4-ch muxed 12-Bit SAR ADC); Eval kit: ADS7953EVM-PDK

ADS8684 (SAR ADC with 16 bits, 4 channels, 500 kSPS, and bipolar inputs off +5V supply). Eval kit: ADS8688EVM-PDK

ADS8638 (12-bit, 8-Channel, Bipolar SAR with software selectable input ranges). Eval Kit; ADS8638EVM-PDK

ADS7253 (12-bit, 2-channel simultaneous sampling; single-ended inputs)  Eval kit: ADS7853EVM-PDK

ADS7254 (12-bit, 2-channel simultaneous sampling; fully-differential input)  Eval kit: ADS7854EVM-PDK

Best Regards,

Luis

.