AMC1303E0510 Datasheet, PDF (25/40 Pages) Texas Instruments – Small, High-Precision, Reinforced Isolated Delta-Sigma Modulators with Internal Clock

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AMC1303E0510, AMC1303M0510, AMC1303E0520, AMC1303M0520
AMC1303E2510, AMC1303M2510, AMC1303E2520, AMC1303M2520
SBAS771 – JUNE 2017
Typical Applications (continued)
Figure 47 shows how the Manchester coded bitstream output of the AMC1303Ex minimizes the wiring efforts of
the connection between the power and the control board. This bitstream output also allows the clock to be
generated locally on the power board without the having to adjust the propagation delay time of each DOUT
connection to fulfill the setup and hold time requirements of the microcontroller.
DC link
Motor
RSHUNT
L1
RSHUNT
L3
RSHUNT
L2
3.3 V _AMC1303Ex 3.3 V
AVDD DVDD
AINP
DOUT
AINN CLKOUT
AGND DGND
3.3 V _AMC1303Ex 3.3 V
AVDD DVDD
AINP
DOUT
AINN CLKOUT
3.3 V _AMC1303Ex 3.3 V
AGND DGND
AVDD DVDD
AINP
DOUT
AINN CLKOUT
3.3 V _AMC1303Ex 3.3 V
AGND DGND
AVDD DVDD
AINP
DOUT
AINN CLKOUT
AGND DGND
TMS320F28x7x
SD-D1
SD-D2
SD-D3
SD-D4
Power Board
Control Board
Copyright © 2017, Texas Instruments Incorporated
Figure 47. Simplified Diagram of the AMC1303Ex in a Frequency Inverter Application
In both examples shown previously, an additional fourth AMC1303 is used to support isolated voltage sensing of
the dc link. This high voltage is reduced using a resistive divider and is sensed by the device across a smaller
resistor. The value of this resistor can degrade the performance of the measurement, as described in the Isolated
Voltage Sensing section.
9.2.1.1 Design Requirements
Table 1 lists the parameters for the typical application in the Frequency Inverter Application section.
Table 1. Design Requirements
PARAMETER
High-side supply voltage
Low-side supply voltage
Voltage drop across the shunt for a linear response
VALUE
3.3 V or 5 V
3.3 V or 5 V
AMC1303x25x: ±250 mV (maximum)
AMC1303x05x: ±50 mV (maximum)
Copyright © 2017, Texas Instruments Incorporated
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