My name is Meir and I am DFAE at Phoenix technologies in Israel.
VAYYAR, one of my customers is interested in AD8132 for RF application. They have got a samples and evaluate the functionality.
They build a circuit as in Figure.56 in the datasheet: Vcc=3.3v,VSS=0.
They rty set the Vocm to 0.6V
At input they have 1MHz signal, 200mV-ptp, 0.5v-offset
- Very large gain difference between the two output ports
- Gains change in wide range when changing input signal offset level
- Total differential output level is about x0.5 vs. input ( expected G=1)
After changing Vocm voltage to ~1.6v - performance is better.
- When Vocm is at ~1.6v - then output common level is 1.6v
When Vocm-pin is at 0.8v - then output common level and gains are not stable
According to data sheet in test condition according to Table3, Output Voltage Swing is 1V from RAILS: VSS(0V) and VCC(5V).
Is it any limitations on Vocm in condition when: Vcc=3.3v, VSS=0?
In this condition the Output Voltage Swing is also 1V from RAILS?
In case of this component can not function with Vocm=0.8, please advice if there is any other solution for this application? (maybe AD8138, OR OTHER...?)