ODHKGL4126FA-03
KGL4126FA
1
Electronic Components
APPLICATION NOTES
1. EXTERNAL BLOCKING CAPACITORS ARE REQUIRED FOR THE DATA INPUTS (IN/INB).
TERMINATION CAPACITORS ARE REQUIRED BETWEEN THE CONTROL VOLTAGES
(VB1/VB2) AND GROUND.
2. To minimize the dependence of the “X-Point” on the supply voltage VS
a. Use an external voltage source of –3.8V for “VB2”, or
b. Control the voltage of “VB1”, so that the voltage difference “VB1–VB2” is constant.
3. To minimize the dependence of “Output amplitude” on the supply voltage VS
a. It is recommended to set “VC1” to a fixed value between VS+0.7V and VS+1.0V. Control the
voltage of “VC1”, so that the voltage difference “VC1–VS” is constant.
b. The Output Amplitude can be tuned by adjusting VD; VD is supplied at the Output Port using an
External Bias-T.
4. Power-up/shut-down sequence
a. For manual power-up, turn on supply control voltages (VB1, VB2, VC1) at first, next
VS, then VD. For shutdown, turn off VD first, then VS, then control voltages. The
sequence for the control voltages (VB1, VB2, VC1) is not critical.
b. For simultaneous start up it is recommended that the delay between the supply
control voltages (VB1, VB2, VC1) and VS be minimized, or that all voltages be
applied at the same time.
11/14
OKI [ OKI ELECTRONIC COMPONETS ]
