AK4122

Features:

1. SRC
         • Asynchronous Sample Rate Converter
         • Input Sample Rate Range (fsi) : 8kHz ∼ 96kHz
         • Output Sample Rate (fso) : 32kHz, 44.1kHz, 48kHz, 96kHz
         • Input to Output Sample Rate Ratio : 0.33 to 6
         • THD+N : −113dB
         • I/F format : MSB justified, LSB justified (16/24bit) and I2S compatible
         • Clock for Master mode : 256/384/512/768fs
         • SRC Bypass mode
         • Soft Mute Function
2. DIR
         • 4-Channel Inputs Selector & 1-Channel Through Output
         • AES3, IEC60958, S/PDIF, EIAJ CP1201 Compatible
         • Low Jitter Analog PLL
         • PLL Lock Range : 32kHz ∼ 96kHz
         • Auto detection
                  - Non-PCM Bit Stream
                  - DTS-CD Bit Stream
                  - Validity Flag
                  - Sampling Frequency (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz)
                  - Unlock & Parity Error
                  - DAT Start ID
         • 40-bit Channel Status Buffer
         • Burst Preamble bit Pc, Pd Buffer for Non-PCM bit streams
         • Q-subcode Buffer for CD bit streams
3. 4-wire Serial P Interface
4. Power Supply
         • AVDD: 3.0 ∼ 3.6V (typ. 3.3V)
         • DVDD: 3.0 ∼ 3.6V (typ. 3.3V)
5. Ta = −10 ∼ 70°C
6. Package : 48pin LQFP


Pinout




Specifications

(AVSS, BVSS, DVSS=0V; Note 1)

Parameter		Symbol	min	max	Units
Power Supplies:	Analog Digital |BVSS − DVSS| (Note 2)	AVDD DVDD GND	−0.3 −0.3 -	4.6 4.6 0.3	V V V
Input Current, Any Pin Except Supplies		IIN	-	±10	mA
Digital Input Voltage 1 (Except RX1-4 pins)		VIND1	-0.3	DVDD+0.3	V
Digital Input Voltage (RX1-4 pins)		VIND2	-0.3	AVDD+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.
Note 2. AVSS, BVSS and DVSS must be connected to the same ground.


Description

The AK4122 is a digital sample rate converter (SRC) with the digital audio receiver (DIR). The input sample rate ranges from 8kHz to 96kHz. The output sample rate is 32kHz, 44.1kHz, 48kHz or 96kHz. By using the product, the system can take very simple configuration because the AK4122 has an internal PLL and does not need any master clock at slave mode. Then it is suitable for the application interfacing to different sample rates like Car Audio, DVD recorder, etc.