Consumption of LTC6910

Question

Dear Analog Team, 
 I have some question on LTC6910, which were not clear to me from the datasheet: 
 
 What is the consumption of the LTC6910 for either +- 5 V supply or 0...+5 V supply and a load of 6.25 kOhm (ADC AD4134 input) or on a AD8422 input? 
 Does the consumption dependent on the gain/how do I calculate the consumption? (in the LTC6373 there is a conclusive guide to calculate the consumption) 
 What is the common mode impedance (Input pin towards ground)? 
 When looking for PGAs on Analog's product page, they did show the LTC6910 but not the very similar LTC6373. Why? 
 
 Thank you very much already for your greatly appreciated effort! 
 Have a good day, 
 Patrick

Kenneth11 · Accepted Answer

Hello Pre, 
 1. You can find the consumption of LTC6910 on page 5 of DS but the specs there is for RL = 10kohms. We can try to simulate on LT spice to check the approximate consumption if you have a load from AD4134 or AD8422 but it will be helpful if you have a schematic of your circuit. 
 2. The consumption will definitely depend on the gain(since internal input resistance and feedback resistance vary depending on the programmed gain). But internal feedback resistance was not specified on DS unlike LTC6373 which has known internal resistances. If you can provide a schematic of your circuit, we can try to check it and see if we can compute the consumption thru LT spice simulation. 
 3. Input resistance can be seen on page 3 - 4. Typical input resistance at unity gain is 10K and is decreasing as gain increases. 
 
 4. LTC6373 is under the instrumentation amplifier on Analog's portfolio. It is a Fully Differential PGA so maybe that's why it was separated on usual PGA's on product page. 
 
 Best Regards, Kenneth)

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Consumption of LTC6910