TS8388BMFS9NB1 E2V, TS8388BMFS9NB1 Datasheet - Page 16

• Manufacturer Part Number: TS8388BMFS9NB1
• Manufacturer: E2V

Specifications of TS8388BMFS9NB1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

0973D–BDC–02/09
Application Information
4.5
4.6
4-2
e2v semiconductors SAS 2009
ADC Gain Adjust
SMA Connectors
and Microstrip
Lines De-
embedding
Fixture
The V
level from -1.2V (V
LVDS output compatibility).
Each output voltage varies between -1.02V and -1.35V (respectively +1.38V and
+1.05V), leading to ±0.33V = 660 mV in differential, around -1.8V (respectively +1.21V)
common mode for V
The ADC gain is adjustable by the means of the pin (60) (pad input impedance is 1 MΩ
in parallel with 2 pF). A jumper denoted ST1 has been foreseen in order to have access
to the ADC gain adjust pin.
The P1 potentiometer is dedicated for adjusting the ADC gain from approximately 0.85
up to 1.15.
The gain adjust transfer function is given below.
Figure 4-1. ADC Gain Adjust
Attenuation in microstrip lines can be found by taking the difference in the log magni-
tudes of the S21 scattering parameters measured on two different lengths of
meandering transmission lines.
Such a difference measurement also removes common losses such as those due to
transitions and connectors.
The scattering parameter S21 corresponds to the amount of power transmitted through
a two-port network.
The characteristic impedance of the microstrip meander lines must be close to 50Ω to
minimize impedance mismatch with the 50Ω network analyzer test ports.
Impedance mismatch will cause ripple in the S21 parameter as a function of both the
degree of mismatch and the length of the line.
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
PLUSD
-600
positive supply voltage allows the adjustment of the output common mode
PLUSD
-400
PLUSD
= 0V for ECL output compatibility) to +1.2V (V
= 0V (respectively 2.4V).
-200
Vgain (command voltage) (mV)
TSEV8388B - Evaluation Board User Guide
0
200
400
PLUSD
= 2.4V for
600