TGA4953-SL View Datasheet(PDF) - TriQuint Semiconductor
Part Name
Description
MFG CO.
'TGA4953-SL' PDF : 19 Pages View PDF
Product Datasheet
Jan 4, 2012
TGA4953-SL
Demonstration Board - Bias ON/OFF Procedure
Vdd=5V, Vo=6Vamp, CPC=50%
(Hot Pluggable)
Bias ON
Bias OFF
1. Disable the output of the PPG
1. Disable the output of the PPG
2. Set Vdd=0V Vctrl1=0V Vctrl2=0 Vg1=0V
2. Set Vctrl2=0V
and Vg2=0V
3. Set Vdd=0V
3. Set Vg1=-1.5V Vg2=-1.5V Vctrl1=-0.2V
4. Set Vctrl1=0V
4. Increase Vdd to 5V observing Idd.
5. Set Vg2=0V
- Assure Idd=0mA
6. Set Vg1=0V
5. Set Vctrl2=+0.2V
- Idd should still be 0mA
6. Make Vg1 more positive until Idd=65mA.
- This is Id1 (current into the first stage)
- Typical value for Vg1 is -0.65V
7. Make Vg2 more positive until Idd=180 – 220 mA.
- This sets Id2T to 115 -155 mA.
- Typical value for Vg2 is -0.55V
8. Enable the output of the PPG.
- Set Vin=500mV
9. Output Swing Adjust: Adjust Vctrl2 slightly positive to increase output swing or adjust
Vctrl slightly negative to decrease the output swing.
- Typical value for Vctrl2 is +0.22V for
Vo=6V.
10. Crossover Adjust: Adjust Vg2 slightly positive to push the crossover down or adjust
Vg2 slightly negative to push the crossover up.
- Typical value for Vg2 is -0.57V to center
crossover with Vo=6V.
TriQuint Semiconductor: www. triquint.com (972)994-8465 Fax (972)994-8504 info-networks@tqs.com 13
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