Hello AAC,
I previously posted on AAC but only on the RF DESIGN section.
I am here because of a DAC BUFFER.
I am trying to drive a laser diode with :
a. 16 bits DAC
b. Inverting AOP as BUFFER
With the high output impedance of the DAC, I have replaced R45 and R49 with 200K resistor.
With the AOP TSB611, I got output at -0.8379VDC with input at +1.77VDC (with -2.5 VDC on the VCC- AOP pin).
With the AOP TSB712, I got output at -0.98VDC with input at +1.6VDC (with -2.63 VDC on the VCC- AOP pin).
My conclusion was that my differents AOPs wasn't big enough.
But when I look to the TSB712 datasheet, I see a typical Isink or Isource of 50mA at VCC = 5V / Tamb = +25 °C.
Anyone could explain to me the procedure to choose the right AOP?
POWER SUPPLIES
DAC & BUFFER (edition 0.0)
I previously posted on AAC but only on the RF DESIGN section.
I am here because of a DAC BUFFER.
I am trying to drive a laser diode with :
a. 16 bits DAC
b. Inverting AOP as BUFFER
With the high output impedance of the DAC, I have replaced R45 and R49 with 200K resistor.
With the AOP TSB611, I got output at -0.8379VDC with input at +1.77VDC (with -2.5 VDC on the VCC- AOP pin).
With the AOP TSB712, I got output at -0.98VDC with input at +1.6VDC (with -2.63 VDC on the VCC- AOP pin).
My conclusion was that my differents AOPs wasn't big enough.
But when I look to the TSB712 datasheet, I see a typical Isink or Isource of 50mA at VCC = 5V / Tamb = +25 °C.
Anyone could explain to me the procedure to choose the right AOP?
POWER SUPPLIES
DAC & BUFFER (edition 0.0)
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