One of my customers has been using MAT04 transistor for their Log amplifier.
Recently, their MAT04 stock become decrease and it is pressing them to start replacement design by MAT14.
For estimating the impact on their Log Amplifier performance, design engineer would like to have the following data which are not shown in the data sheet of MAT14.
1. Regarding Figure 5 in MAT14 Data Sheet, Base Emitter-On-Voltage, they need the graph to Ic=1pA.
2. They need the Collector-to-Substrate Leakage vs. Temperature graph. They especially interested in the leakage at around 0V to 5V of collector-to-Substrate voltage.
3. Figure 14 of MAT14 Data Sheet shows Collector-to-Collector Leakage vs., Temperature. They would like to see the same graph of MAT04 for the comparison purpose.
4. The information of structural difference between MAT04 and MAT14, such as p/n area size, transistor size, insulation size etc.
I'll be asking your queries to the Applications Engineer of these parts. I'll update you as soon as I receive feedback from him.
Could you suggest me when I can receive your answer?
My customer asked it to me.
Thank you for your help.
Sorry for the delay. Please refer to the answers below from the Applications Engineer of MAT04 and MAT14.
We have the data down to Ic = 100pA and Vbe ≈ 0.14V when we gathered data during characterization.
The Collector-to-Substrate Leakage vs. Temperature was not measured during characterization and it was not specified in the datasheet for both MAT04 and MAT14.
Same thing here. We do not have the data for MAT04 Collector-to-Collector Leakage vs. Temperature graph. MAT14 data was added in later.
MAT04 and MAT14 are equivalent in device size, technology and process.
Thank you for your reply.
I will pass it to my customer.
Thank you again for your help.
I have received another question from the customer.
His question is difference between two graphs of Base-Emitter-On-Voltage vs. Collector Current,
There is big difference of two graphs in the area of Ic is 0.5mA and above, as shown in attached sheet.
What is the cause of this difference?