AD8230 Bandwitdh

Question

Hi, 
 I am planning to use AD8230 in my new design. I would like to know what is the bandwithd it supports for. 
 Regards, 
 ChiranjeeviM

EZAdministrator · Accepted Answer

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EZ Admin

KJBob · Answer

Hello, 
 The AD8230 is recommended for amplifying the outputs of thermocouple and mechanical sensors -- generally low-bandwidth signals. Although bandwidth does not appear in the "headline" specs of its data sheet, graphs on pages 8 and 9 provide the frequency response. For programmed gains of 100 or less, the part is flat up to 1KHz, and about 3dB down at 2KHz: 
 
 The repetitive nulls at 6KHz and above are from the part's internal 6KHz sampling frequency. Sampling theory (same as for DSP) suggests that in any case, usage be limited to below fs/2 = 3KHz. Also due to the sampling, any resistances feeding the inputs should be below 10K ohms and well-matched. 
 Best regards, 
 Bob

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AD8230 Bandwitdh