Texas Instruments TAS3002 manual Input Multiplexer, DAC Interpolation Filter

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8.6 Input Multiplexer

8.6 Input Multiplexer

T	= 25°C, AV	= 3.3 V, DV = 3.3 V, f	S	= 48 kHz, 20-bit I2S mode
A	DD	DD	S
		PARAMETER			TEST CONDITIONS	MIN TYP MAX	UNIT

Input impedance						20	kΩ

Crosstalk						85	dB

Full-scale input voltage range						1.7	VPP

8.7 DAC Interpolation Filter

TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, fS = 48 kHz, 20-bit I2S mode

All terms characterized by frequency are scaled with the normal mode sampling frequency, fS. See Figure 8−5 and Figure 8−6 for performance curves of the DAC digital filter.

PARAMETER	TEST CONDITIONS	MIN TYP	MAX	UNIT

Pass band		0.0	20.0	kHz

Pass-band ripple		±0.005		dB

Stop band		24.1		kHz

Stop-band attenuation	28.8 kHz to 3 MHz	75		dB

Group delay		700		∝s

Amplitude − dB

0

R

−20

−40

−60

−80

−100

0	fs/2	1 fs	2 fs	3 fs	4 fs	5 fs
			f − Frequency − Hz

Figure 8−5. DAC Filter Overall Frequency Characteristics

	0.1
− dB	0.05
− dB
Amplitude	0
Amplitude	−0.05
	−0.05
	−0.1
	0	0.1 fs	0.2 fs	0.3 fs	0.4 fs	0.5 fs
			f − Frequency − Hz

Figure 8−6. DAC Digital Filter Pass-Band Ripple Characteristics

8−4

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Contents Data Manual TAS3002Digital Audio Processor With Codec 2001IMPORTANT NOTICE 1.2Features 1 Introduction1.1 Description 1.3Functional Block Diagram Figure 1−1. TAS3002 Block Diagram 1.4 Terminal Assignments 1.5 Terminal FunctionsFigure 1−2. TAS3002 Terminal Assignments Table 1−1. TAS3002 Terminal FunctionsTable 1−1. TAS3002 Terminal Functions Continued Page 2 Audio Data Formats 2.1 Serial Interface FormatsTable 2−1. Serial Interface Options … … … … 2.2 Digital Output Modes… … … … … … … …2.2.2I2S Serial-InterfaceFormat Figure 2−2. I 2S Serial-InterfaceFormat… … … … … … … …2.2.3MSB-Left-Justified, Serial-InterfaceFormat … … … …… … … … … … … …2.3 Switching Characteristics PARAMETERUNIT tcSCLK SCLK LRCLK tdSDOUT SDOUT1 SDOUT2 SDOUT0Page 3 Analog Input/Output 3.1 Analog Input3.2 Analog Output 3.2.1Direct Analog Output3.2.2Analog Output With Gain Figure 3−2. VCOM Decoupling NetworkFigure 3−3. Analog Output With External Amplifier 3.2.3Reference Voltage Filter TAS3002Figure 3−4. TAS3002 Reference Voltage Filter Page 4.1 Soft Volume Update 4 Audio Control/Enhancement Functions4.2 Software Soft Mute 4.3 Input Mixer Control4.4 Mono Mixer Control 4.5 Treble ControlFigure 4−1. TAS3002 Mixer Function 4.6 Bass Control 4.7 De-EmphasisMode DMFigure 4−2. De-EmphasisMode Frequency Response 4.8 Analog Control Register 40h Table 4−1. Analog Control Register Description4.9 Dynamic Loudness Contour 4.9.1Loudness Biquads4.9.2Loudness Gain 4.9.3Loudness Contour Operation4.10 Dynamic Range Compression/Expansion DRCE 4.11 AllPass Function4.12 Main Control Register 1 01h 4.13 Main Control Register 2 43hTable 4−2. Main Control Register 1 Description Table 4−3. Main Control Register 2 DescriptionPage Figure 5−1. Biquad Cascade Configuration 5 Filter Processor5.1 Biquad Block 5.1.1Filter CoefficientsPage 6 I2C Serial Control Interface 6.1 Introduction6.2 I2C Protocol Figure 6−1. Typical I 2C Data Transfer Sequence6.3 Operation 6.3.1Write Cycle ExampleTable 6−1. I 2C Protocol Definitions Table 6−2. I 2C Address Byte Table6.3.2TAS3002 I2C Readback Example 6.3.3I2C Wait States6.4 SMBus Operation 6.4.1Block Write Protocol6.4.2Write Byte Protocol Table 6−3. I 2C Wait States6.4.3Wait States 6.4.4TAS3002 SMBus ReadbackPage 7.2 Power-Up/Power-DownReset 7.2.1Power-UpSequence7.2.2Reset 7 Microcontroller Operation7.2.3Reset Circuit Figure 7−1. TAS3002 Reset Circuit7.2.4Fast Load Mode TAS30027.3 Power-DownMode 7.2.5Codec Reset7.3.1Power-DownTiming Sequence Figure 7−2. Power-DownTiming Sequence7.4 Test Mode 7.5 Internal Interface7.6.2GPI Architecture Table 7−1. GPI Terminal ProgrammingFigure 7−3. Internal Interface Flow Chart Restore Volume and MCRStart Power Up Initialize Default EEPROM Slave Write GPI Power Down7.7 External EEPROM Memory Maps Table 7−2. 512-ByteEEPROM Memory Map 2.0 ChannelsADDRESS BYTE NUMBERFUNCTION TAS3002TAS3002 ADDRESS NUMBERFUNCTION CATEGORYTAS3002 ADDRESS NUMBERFUNCTION CATEGORY8 Electrical Characteristics Static Digital Specifications8.2 Recommended Operating Conditions Figure 8−1. ADC Digital Filter Characteristics 8.4 ADC Digital FilterFigure 8−4. ADC High-PassFilter Characteristics 8.5 Analog-to-DigitalConverter8.6 Input Multiplexer 8.7 DAC Interpolation Filter8.8 Digital-to-AnalogConverter 8.9 DAC Output Performance Data8.10 I2C Serial Port Timing Characteristics Figure 8−7. I 2C Bus Timing9 System Diagrams Figure 9−1. Stereo ApplicationTAS3002 ClockTAS3001 Figure 9−2. TAS3002 Device, 2.1 ChannelsTAS3002 10 Mechanical Information PFB S-PQFP-G48PLASTIC QUAD FLATPACK 10−2