Datasheet

Single Supply Operation
3-3
THS6043EVM Applications
3.2 Single Supply Operation
Many designs use single supply voltages, and the THS6043EVM allows single
supply operation. The THS6043EVM can be reconfigured for single supply
operation as shown in Figure 3−2. To convert to single supply operation:
- Connect ground from the power supply to both J5 (GND) and J4 (−V
CC
).
- Jumper pins 2 and 3 of JP1 together with a jumper plug. This enables
connection to a half supply voltage divider.
- Populate R4, R14, R20, and R21, with 4.99 kΩ 1% resistors. R20 and R21
create the half supply potential (virtual ground for the stage). R4 and R14
sum this potential into the noninverting inputs of the op amps.
The half-supply virtual ground potential is also present on the
output of the op amps. No provision has been made on the EVM for
output dc-blocking capacitors. When the outputs are monitored
with equipment that has 50-Ω inputs, 75 mW is dissipated through
R17, R18, and the input resistors of the measuring equipment.
- Remove the zero Ω jumpers located at Z1 and Z2 and replace them with
dc-blocking capacitors.
Figure 3−2. Single-Supply Operation
+V
TP3
R4
R18
>>> GND
+
−
U1A
THS6043
2
3
1
14
4
R5
R17
Z2
J5
GND
R7
210
W
J2
IN2
R14
FB1
1
+V
TP4
OUT2
Z1
J1
IN1
J6
OUT1
JP1
R20
R1
TP1
+
C9
R23
0
+V
J3
+VCC
R21
R24
0
J4
−VCC
C3
J7
OUT2
FB2
+
−
U1B
THS6043
12
11
13
R12
−V>>> GND
TP2
OUT1
R16
49.9 W
4.99 kW
4.99 kW
4.99 kW
0.1 mF
750 W
49.9 W
1 mF
4.99 kW
0.1 mF
49.9 W
750 W
1 mF
49.9 W