Analog Input Configurations, Mixing and Muxing of TAx5x1x-Q1 Devices

Abstract

The TAx5x1x-Q1 (TAC5412-Q1, TAC5311-Q1, TAC5312-Q1, TAC5411-Q1, TAA5412-Q1) family of devices have single or dual-channel analog-to-digital converters which supports highly configurable inputs for audio applications. This application note looks at the different input configurations, the input swing, the input coupling mode as well as the mixing and muxing option that are supported in this TAx5x1x-Q1 device family. TAC5412-Q1, a stereo device is used in this application note with audio source provided at the LINE input. Microphone inputs or a mono version of this device can be configured in the similar manner.

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1 Introduction

TAC5412-Q1 is a CODEC with dual-channel analog-to-digital converters whose input pins (IN1P/M and IN2P/M) are configurable as differential inputs, single-ended inputs or single-ended mux inputs in AC or DC coupling. The type of input is configured through ADC_CH1_INSRC and the AC or DC coupling mode is configured through ADC_CH1_CM_TOL [00] or ADC_CH1_CM_TOL [01].

Table 1-1 Input Configuration Selection

Input Configuration Setting	B0_P0_R80 (ADC_CH1_CFG0) [7:6]	Input Channel Configuration
0	ADC_CH1_INSRC=[00]	Analog differential input
1	ADC_CH1_INSRC=[01]	Analog single-ended input
2	ADC_CH1_INSRC=[10]	Analog single-ended mux INP1 input
3	ADC_CH1_INSRC=[11]	Analog single-ended mux INM1 input