STA529 datasheet(23/58 Pages) STMICROELECTRONICS

部件名	STA529

功能描述	2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX

PDF	58 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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STA529

ADC

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6.1.2

High-pass filter characteristics

6.1.3

Programmable gain amplifier

The programmable gain amplifier (PGA) is available in mic-in mode only. It is possible to

amplify the input signal from 0 to 42 db in steps of 6 db. The setting is done through PGA

bits of the ADCCFG register (see ADCCFG on page 49 for details).

See Table 9 on page 14 for performance values.

6.2

Application scheme

Figure 6 shows the filter circuit.

Figure 6.

Block diagram

Table 14.

High-pass filter characteristics

Parameter

Typical

Unit

Frequency response:

-3 dB

-0.08 dB

Phase deviation at 20 Hz

19.35

degree

Passband ripple

0.08

AC coupled

DC coupled

AC coupled

1.8 V supply

VSSA

INL

INR

AVDD

AGND

VHI

VLO

VCM

VBIAS

C1, C2, C3, C4 = 10 nF

(These capacitors must be

placed very close to their

respective pins)

C5, C6, C7 = 33 µF

(Low ESR and ESL

capacitors are

recommended)

VSSA plane must be

different from other

ground plane

3V, 3A must be a

low-noise supply and

separate from

other supplies

R1 = 500

Ω

C8 = 10 µF

C9, C0 = 1 µF

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