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| THS6212 Datasheet, PDF (33/48 Pages) Texas Instruments – Differential, Line-Driver Amplifier | |||
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Typical Applications (continued)
THS6212
SBOS758 â MAY 2016
RM
VPP
=
2
VLPP
n
VLPP
n
RM
RL
VLPP
Copyright © 2016, Texas Instruments Incorporated
Figure 85. Driver Peak Output Voltage
With the previous information available, a supply voltage and the turns ratio desired for the transformer can now
be selected, and the headroom for the THS6212 can be calculated.
The model shown in Figure 86 can be described with Equation 14 and Equation 15 as:
1. The available output swing:
VPP = VCC - (V1 + V2) - IP ´ (R1 + R2)
(14)
2. Or as the required supply voltage:
VCC = VPP + (V1 + V2) + IP ´ (R1 + R2)
(15)
The minimum supply voltage for power and load requirements is given by Equation 15.
V1, V2, R1, and R2 are given in Table 2 for the ±12-V operation.
VCC
R1
V1
VS
±12 V
TI Device
V2
R2
VOUT
IP
Copyright © 2016, Texas Instruments Incorporated
Figure 86. Line Driver Headroom Model
Table 2. Line Driver Headroom Model Values
V1
R1
V2
1V
0.6 Ω
1V
R2
1.2 Ω
Copyright © 2016, Texas Instruments Incorporated
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