tga4802-epu TriQuint Semiconductor, tga4802-epu Datasheet - Page 8

• Manufacturer Part Number: tga4802-epu
• Description: 12.5gb/s Irz Modulator Driver
• Manufacturer: TriQuint Semiconductor

TriQuint Semiconductor Texas Phone: [phone] Fax: [phone] Email: [e-mail] Web: www.triquint.com
Note: Devices designated as EPU are typically early in their characterization process prior to finalizing all electrical and process
specifications. Specifications are subject to change without notice
Notes:
1. Assure Vctrl never exceeds Vd during Bias ON and Bias OFF sequences and during normal operation.
Bias ON
1. Disable the RF source (PPG)
2. Set VdT=0V Vctrl=0V and Vg=0V
3. Set Vg=-1.5V
4. Increase VdT to 7V observing Id.
5. Set Vctrl=+1.0V
6. Make Vg more positive until Idd=170mA.
7. Measure V
8. Adjust Vg such that Idd=170mA.
9. Enable the RF source (PPG)
10. Output Swing Adjust: Adjust Vctrl slightly positive to increase output swing or
adjust Vctrl slightly negative to decrease the output swing.
11. Crossover Adjust: Adjust: Vg slightly positive to push the crossover down or adjust
Vg slightly negative to push the crossover up.
- Assure Id=0mA
- Id should still be 0mA
- Typical value for
- This will set Vd(RFout) to approximately 6V.
- Idd will increase slightly
- Set Vin=2V
- Typical value for
- Typical value for
+
, adjust VdT such that V
Bias Procedure for 7V Output
Vg is -0.2V
Vctrl is +1.0V
Vg is -0.2V
to center crossover with Vo=7V.
for Vo=7V.
+
is 6V.
Advance Product Information
Bias OFF
1. Disable the output of the PPG
2. Set Vctrl=0V
3. Set VdT=0V
4. Set Vg=0V
TGA4802EPU
July 22, 2004
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