AK4545

Features:

AC' 97 Rev. 2.1 Compliant
S/PDIF output
18bit Resolution A/D and D/A
Exceeds PC99 Performance Requirements:AK4545 (@fs=48k)
             A/D...... 90dBA
             D/A...... 89dBA
             A-A...... 95dBA
Analog Inputs:
            4 Stereo Inputs: LINE, CD, VIDEO, AUX
            Speakerphone and PC BEEP Inputs
            2 Independent MIC Inputs
Variable Sampling Rate Support
            48k, 44.1k, 32k, 22.05k, 16k, 11.025k, 8k
Analog Output:
             Stereo LINE Output with volume control
             True Line Level with volume control
             Mono Output with volume control
3D Stereo Enhancement
POP Function & DAC Feed Back Control
EAPD(External Amplifier Powerdown) Support
Power Supplies: Analog 5.0V, Digital 3.3V
Low Power Consumption
           215mW(Analog:5V/Digital:3.3V) at full operation
48 Pin LQFP Package


Pinout




Specifications

AVss1, AVss2, DVss1, DVss2 =0V (Note 1)

Parameter	Symbol	min	max	Units
Power Supply: (Note 2) Analog(AVdd1 & AVdd2) Digital(DVdd1 & DVdd2)	VA VD	-0.3 -0.3	6.0 6.0	V V
Input Current (any pins except for supplies)	IIN	-	±10	mA
Analog Input Voltage	VINA	-0.3	VA+0.3	V
Digital Input Voltage	VIND	-0.3	VD+0.3	V
Ambient Temperature (Powered applied)	Ta	-10	70	°C
Storage Temperature	Tstg	-65	150	°C

Note 1: All voltages with respect to ground .
             AGND(AVss1, AVss2) and DGND(DVss1, DVss2) should be same voltage.
Note 2: Supplying Digital Power, Analog Power should be supplied.



Description

The AK4545 is a 18bit high performance codec which supports variable sampling rate conversion compliant with Audio Codec ' 97 Rev 2.1 requirements.It supports S/PDIF output that is digital audio transmitter of IEC958. Audio digital data in PC can be output by this S/PDIF out.The AK4545 provides two pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono inputs,along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs. In addition, the AK4545 has the POP feature suitable for 3D positioning and direct output from DAC for AD monitoring.

Sampling frequency is programmable through AC-link as 48k, 44.1k,32k, 22.05k, 16k, 11.025k, and 8kHz. This setting is done independent to ADC and DAC side while L/R channels are kept identical.The AK4545 provides excellent audio performance, meeting or exceeding PC99 requirements for a PCI audio solution. It has low power consumption, and flexible power-down modes for use in laptops as well as desktop PCs and aftermarket add-in boards.Like the earlier pin-compatible AK4541, AK4543 and AK4544A , the AK4545 is available in a compact 48-lead LQFP package.
Reference : Audio Codec ' 97 Revision 2.1