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2.3
The Driving Circuit about LM8350
The input signal can be connected with the J1 header. R3 and R4 are used for the single-ended input
signal. R5, R6, R7, and R8 are used as the input resister and feedback resister, which determine the gain
of the circuit. These are all 1k ohm, so the gain is one. R1 and R2 consist of the voltage divider, to
determine the power mode of the LM8350 by connecting the EN pin. C17 is the bypass capacitor from
VOCM to ground. C8, C9, and C10 are the bypass capacitors of power supply.
Figure 4. The Driving Circuit about LM8350
2.4
The Interface between LM8350 and ADC161S626
The standard 100 mils header J2 is the interface between LM8350 and ADC161S626. Pin 1 and pin 5 are
the differential output of LM8350. The OUT+ and OUT- are test points to probe the LM8350 differential
output. Pin 2 and pin 4 are the differential input of ADC161S626. The user can select LM8350 to drive
ADC, just shorting pins 1-2 and pins 4-5. Otherwise the user could test the performance of the
ADC161S626 directly when pin 2 and pin 4 are connected with an input differential signal. Pin 3 is GND.
Figure 5. The Interface between LM8350 and ADC161S626
8
List of Tables
SNOU130A – July 2014 – Revised February 2015
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