PCM2704CDB datasheet(32/53 Pages) TI2

32 / 53 page

PCM2704C, PCM2705C, PCM2706C, PCM2707C

SBFS036B – MAY 2015 – REVISED AUGUST 2015

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Typical Application (continued)

10.2.1.1 Design Requirements

For this design example, use the parameters listed in Table 10.

Table 10. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage range

4.35 V to 5.25 V (USB power)

Current

500 mA (Bus-Powered Max power)

Input clock frequency

11.994 MHz to 12.006 MHz

10.2.1.2 Detailed Design Procedure

The PCM2704C/5C/6C/7C is a simple design device that can connect directly to a USB port. Only a 3.3-V

external regulator is needed (in self-powered mode), and an external ROM for the descriptor programming

function (PCM2704C/6C). The switches connected to the HID ports must be normally open. TI recommends

placing an output filter such as the one shown in Figure 35. The PCM2704C/5C/6C/7C requires decoupling

capacitors on the voltage source pins.

10.2.1.3 Application Curves

For the application curves, see the graphs listed in Table 11.

Table 11. Table of Graphs

FIGURE

Frequency Response

Figure 6

DAC Digital Interpolation Filter

Frequency Response

Passband Ripple

Figure 7

Passband Characteristics

Figure 8

DAC Analog Low-Pass Filter

Frequency Response

Stop Band Characteristics

Figure 9

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Product Folder Links: PCM2704C PCM2705C PCM2706C PCM2707C

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