STA1275 datasheet(49/109 Pages) STMICROELECTRONICS

49 / 109 page

DS12586 Rev 5

49/109

STA1295, STA1275

Package pinouts and signal description

106

ADC0_1_AVDD

—

M16

—

ADC0 and ADC1 analog 3.3 V

supply.

ADC0_1_AGND

—

N16

—

ADC0 and ADC1 analog 3.3 V

supply ground.

ADC0_1_VCM

—

K19

—

ADC0, ADC1 common voltage.

Connect 10nF and 10uF

capacitors connected to GND.

ADC0_1_VRFN

—

L16

—

ADC0 and ADC1 Vref negative.

Connect it to GND.

ADC0_1_VRFP

—

K20

—

ADC0 and ADC1 Vref positive.

Connect 10nF and 10uF

capacitors connected to GND.

MIC_BIAS

—

K21

—

Bias voltage for microphone.

2.5 V +/- 5% 4mA max.

DAC_IO_AGND

—

H19

—

DAC0, DAC1, DAC2 I/O analog

3.3 V supply.

—

K18

—

DAC_IO_AVDD

—

G18

—

DAC0, DAC1, DAC2 I/O analog

3.3 V supply ground.

—

J19

—

DAC_AVDD

—

J18

—

DAC0, DAC1, DAC2 analog

3.3 V supply.

DAC_AGND

—

H18

—

DAC0, DAC1, DAC2 analog

3.3 V supply ground.

DAC_VCOM

—

E22

—

DAC0, DAC1, DAC2 common

voltage.

Connect 10 nF and 10 uF

capacitors to DAC_AGND.

DAC_VHI

—

E23

—

DAC0, DAC1, DAC2 analog

positive reference.

Connect 10 nF and 10 uF

capacitors to DAC_AGND.

DAC_VLO

—

K17

—

DAC0, DAC1, DAC2 analog

negative reference.

Connect it to DAC_AGND.

ADC2_3_AVDD

—

G16

—

ADC2 (SAR) analog 3.3 V

supply.

—

H17

—

ADC2_3_AGND

—

G15

—

ADC2 (SAR) analog 3.3 V supply

ground.

ADC2_VREFN

—

J17

—

ADC2 (SAR) Vref negative.

Connect it to ADC2_3_AGND.

ADC2_VREFP

—

P19

—

ADC2 (SAR) Vref positive.

Table 25. Power signals (continued)

Name

GPIOs

BALLs DIR

Power

domain

Description

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