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This EVM supports the following features:
The AMC1333 is a 1-bit modulator with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO2) isolation barrier. The isolation barrier provides galvanic isolation of up to 8000 VPEAK. When used in combination with a digital filter, the AMC1333 can be used to achieve 16-bit, analog-to-digital (A/D) conversion with no missing codes.
For use in high-resolution measurement applications, an effective accuracy of 14 bits can be obtained with a digital filter bandwidth of 20 kHz at a modulator rate of 10 MHz.
Table 1-1 lists the related documents available through the Texas Instruments web site at www.ti.com.
Document | Literature Number |
---|---|
AMC1333 data sheet | https://www.ti.com/lit/pdf/SBASA71 |
Comparing
Isolated Amplifiers and Isolated Modulators technical white paper |
https://www.ti.com/lit/pdf/SBAA359 |
The analog input to the AMC1333EVM is routed from a three-wire screw terminal screw at J1. This screw terminal provides access to the inverting and noninverting inputs of the AMC1333.
The analog input to the AMC1333EVM board allows connection to AINP and AINN through an R/C filter with 10-Ω resistors (R5 and R6) and a 10-nF capacitor (C2). If filtering is not required, the C2 capacitor can be removed and the R5 and R6 resistors can be replaced with 0-Ω resistors.
The user optional resistor divider network that consists of R1, R2, and R3 is not populated by default. Populating this resistor divider network allows the user to select values of R1, R2, and R3 to generate a voltage across R3 for voltage sensing. Figure 2-1 shows an input circuit schematic for the AMC1333EVM and Table 2-1 lists the screw terminal connections.
Pin Number | Signal | Description |
---|---|---|
J1.1 | AINP | Noninverting analog input to the AMC1333 |
J1.2 | AINN | Inverting input to the AMC1333 |
J1.3 | AGND | Analog ground reference |
The AMC1333EVM digital input/output is a simple three-terminal screw connector located at J4. J4.2 is the output data from the modulator installed in location U1. As shown in Figure 3-1, pin 7 of U1 is the modulator clock output. The clock output can be monitored at J4.3 relative to J4.1. Figure 3-1 shows the digital I/O circuitry for the AMC1333EVM. Table 3-1 lists the digital output signals relative to J4.
Pin Number | Signal | Description |
---|---|---|
J4.1 | DGND | Digital ground reference |
J4.2 | DOUT | Modulator bit stream data output |
J4.3 | CLOCK | Modulator clock |