SN6501-Q1

0.1 …F

10 …F

GND2

GND1

20 V

20 V

10 …F

0.1 …F

TPS7B6933-Q1

GND

GND1

0.1 …F

2.2 …F

GND2

VDD2

VDD1

AINP

AINN

MCE

AMC1035-Q1

VDD

GND

DOUT

CLKIN

û Modulator

GND1

DATA

CLK

GND1

VDD1

GND2

VDD2

0.1 …F

GND1

0.1 …F

IN

OUT

10 …F

D1

D2

VCC

GND

ISO7721-Q1

AINP

AINN

MCE

AMC1035-Q1

R3

R2

R1

VDD

GND

3.0 V to 3.6 V

C1

0.1 F

C2

2.2 F

SD-Cx

SD-Dx

TMS320F2837x

PWMx

DOUT

CLKIN

û Modulator

Phase X

optional

anti-aliasing filter

24

AMC1035-Q1

SBAS941A – MAY 2019 – REVISED NOVEMBER 2019

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9 Power Supply Recommendations

To decouple the power supply, place a 0.1-µF capacitor as close to the VDD pin of the AMC1035-Q1 as

possible, as shown in Figure 48, followed by an additional capacitor in the range of 1 µF to 10 µF.

Figure 48. Decoupling the AMC1035-Q1

Safety considerations or high common-mode voltage levels can require the AMC1035-Q1 to be galvanically

isolated from other parts of the system. Figure 49 shows an example of a circuit that uses the ISO7721-Q1 to

isolate the signal path and the SN6501-Q1 and a transformer are used to generate the required isolated power.

Figure 49. Galvanic Isolation of the AMC1035-Q1