About AD1674 Reference Circuit

Question

Hi, 
 I have been using the AD573, but since it is a newly developed deprecated product, So I have been looking for an alternative, and the AD1674TDseems to work. 
 (I chose the AD1674TD because it must support a temperature range of -55&deg;C and &plusmn;5 V input.) 
 However, the AD1674 datasheet does not include a reference circuit. There is no evaluation board either. 
 Are there any reference circuits or documents that can be used as a reference for the design? 
 I posted the same thing in the Reference Designs column first, but I was advised to post it in the Precision AD Converter column. 
 Regards, 
 
 Kazu

andreialejandro · Accepted Answer

Hi Kazu, 
 I recommend using an analog front end which is the ADA4625-1 to shift the level from -5V - +5V to 0V - 5V to drive the AD7691 which is an 18-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, V DD , between 2.3 V and 5 V. 
 Here is the schematic below that will be connected to the driven ADC. 
 
 Regards, 
 Andrei)

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About AD1674 Reference Circuit