This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi Team,
I am looking for the Integrated Amplifier with latched output comparator. With below mentioned specification.
Input Voltage = 2.5V to 36V
Gain =5 or less then 5
slew rate= 30V/uS
Automotive Qualified AEC-Q100 or AEC-Q101
SMD Part
Kindly, suggest part that will be helpful ASAP.
Thank You,
Suma
Hi Suma,
have you already searched here:
https://www.ti.com/amplifier-circuit/current-sense/products.html
A slew rate of 30V/µs is rather high for a current sense amplifier. Have you thought about separating the comparator from the amplifier and to use separate chips?
Kai
Suma,
Input swing is 33.5V and gain is 5 ; that makes a 168V output swing. Is this correct?
What is the supply voltage?
Hi Ron Michallick,
I am looking for input voltage of 5V and gain less than 5. With slew rate 10V/uS to 15V/uS. Automotive qualified part. SMD part.
Suma,
Here is search URL for 5V supply 15V/us slew, 15MHz, and automotive. https://www.ti.com/amplifier-circuit/op-amps/products.html#p22typ=15;8000&p23typ=15;8000&p1498=Automotive&p1261max=5;180&p1261min=0.9;5
You could use second amp as a comp/latch but it will be slower response than an actual comparator.
Here is a list of single channel automotive comparators sorted by speed. https://www.ti.com/amplifier-circuit/comparators/products.html#p480=1;1&p1498=Automotive&sort=p83;asc
Hi Ron Michallick,
Thank you for part suggestion. I am looking for less cost latched comparator output or Integrated amplifier with latched output Comparator.
With below mentioned specification:
Input Voltage= 5V
Slew rate of op-Amp=10 to 15V/uS
Gain less then 5
Latched output
Regards,
Suma
Suma,
I'm not aware of any high speed op amp and comparator in same package.
Hi Suma,
the only OPAmp / comparator combination I know is the LM392-N. But this is only a low speed OPAmp (1MHz) and a low speed comparator (1.3µs). Implementing a much faster OPAmp and a much faster comparator on the same die would not make much sense because of unwanted cross coupling effects between both parts at high frequencies. One would need to spend the OPAmp and comparator individual supply voltage bond wires and package pins to allow individual and seperate power supply decoupling caps and to prevent a cross coupling across the common ground bond wire. Then it is way simpler and makes much more sense to use an OPAmp and a comparator in individual and seperate packages.
It's a bit like using the CD4046: In sensitive circuits you take two seperate CD4046 and use the phase comparator of the one and the VCO of the other
Kai