Rather than trying to shift the ADC supply voltages which may not be entirely successful, why not use a fully differential amplifier such as the ADA4945 to shift the input voltage of your signal into the range compatible with the ADC.
Thanks for your help.
I bought a amplifier in ADI, which is ADA4945-1CP-EBZ, this amplifier can provide a common mode voltage with good quality.
+VClamp and -Vclamp can be driven by either a voltage divider network or by an external power supply. However, when you chose to drive via voltage divider network always consider it's internal resistance for accurate voltage clamping. In the…
Here is a list of ADI fully differential amplifiers sorted for low distortion (< -100dB), and low noise (<3nV) as a first pass at zeroing in on suitable drivers for the AD7380 (16 bit, SAR, diff input ADC):
ADA4945-1 LTC6363 LTC6363-0.5…
I have a simple question.
I think an offset voltage drift of OP-amps has positive or negative tenpareture coefficiency, but that is not written in data sheets such as OP1117, AD829, and AD8099.
On the other hand, a sign of +/- is written i…
Dear Forum members.
Could you please comment on the following?
I really like the output voltage clamp feature o the new ADA4945-1 ADC driver.
Is there however another device with higher bandwidth option planned for future release?
Especial one with improved…
In LTC2380-24 datasheet,
Which setting is used in LTC2380? (How ns is acquisition time?)
With Precision ADC Driver Tool,
・ADC Driver is LTC6363（short circuit current is near LTC6362）.
・fin=2kHz Rext=35.7Ω Cext=6.8nF Sample Rate =2MSPS Vref=5V…
In DN1032, the inverting amplifier U3, acts merely to keep the common mode voltage within the required Vref/2 +/-100mV. As long as it does this, its absolute accuracy is not necessary. The circuit of DN1032 is designed primarily for DC applications. If…
The simplest way to do this would be to use a differential amplifier like ADA4945 or ADA4940. These fully differential amplifiers have a pin which can be used to adjust the common mode voltage.
Or you could also set AVSS to -2.5V and reference all…