Datasheet AK7604 (Asahi Kasei Microdevices)
| Manufacturer | Asahi Kasei Microdevices |
| Description | Audio DSP with 2chADC + 6chDAC + 8chSRC |
| Pages / Page | 37 / 1 — [AK7604] AK7604. Audio DSP with 2chADC + 6chDAC + 8chSRC. 1. General … |
| File Format / Size | PDF / 805 Kb |
| Document Language | English |
[AK7604] AK7604. Audio DSP with 2chADC + 6chDAC + 8chSRC. 1. General Description
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[AK7604] AK7604
Audio DSP with 2chADC + 6chDAC + 8chSRC
1. General Description
The AK7604 is a highly integrated digital signal processor, including a 24-bit stereo ADC with input
selector, three 24-bit stereo DACs, four stereo sampling rate convertors supporting the sampling
frequency up to 192kHz and an Audio DSP. The Audio DSP has 2560step/fs (when fs=48kHz) parallel
processing power and freely programmable for user requirements. The AK7604 is available in a 48-pin
LQFP package.
2. Features □ Audio DSP:
-Word length:
28-bit (Simple floating point supported)
-Instruction cycle:
Max. 8.1ns (2560fs at fs=48kHz)
-Multiplier:
24 x 24 → 48-bit (Double precision arithmetic available)
-Divider:
24 / 24 → 24-bit (Floating point normalization function)
-ALU:
64-bit Arithmetic Operation (with 16bits overflow margin)
-Program RAM:
1024-word x 36-bit
-Coefficient RAM:
1024-word x 24-bit
-Data RAM:
6144-word x 28-bit
□ ADC: 24-bit Stereo ADC with Input Selector
-Sampling Frequency: fs = 8kHz ~ 96kHz
-Input Selector: Differential Stereo Input or Single-end Input or Pseudo Differential Input
with Analog Gain Amplifiers x 1, Single-ended Stereo Input x 2
-Channel Independent Analog Gain Amplifiers (0~18dB(2dB Step), 18~36dB(3dB Step)
-ADC Characteristics
S/N: 106dB (fs=48kHz, Differential Input, Analog Gain=0dB)
-Channel Independent Digital Volume Control (24dB ~ -103dB, 0.5dB Step, Mute)
-Digital HPF for DC Offset Cancelling
-1Vrms Input Full Scale
-Low Noise MIC Power Output x 2
□ DAC: 24-bit DAC
-2ch x 3
-Sampling Frequency: fs = 8kHz ~ 96kHz
-Single-ended Output
-1Vrms Output
-DAC Characteristics
S/N: 108dB (fs=48kHz)
-Channel Independent Digital Volume Control (12dB ~ -115dB, 0.5dB Step, Mute)
□ SRC:
-2ch x 4
-FSI = 8kHz ~ 192kHz, FSO = 8kHz ~ 192kHz (FSO/FSI = 0.167 ~ 6.0)
□ Digital Interfaces
-Digital Input Port x 4 (TDM Support: 1 Port)
-Digital Output Port x 3 (TDM Support: 1 Port)
-Independent LRCK/BICK port x 3
-Data Format: MSB 32, 24bit / LSB 24, 20, 16bit / I2S / PCM Short Frame / PCM Long Frame
-TDM Input/Output Mode (Max: 8ch/256fs, fs=96kHz) 018011601-E-00-PB 2018/09
-1-
Audio DSP with 2chADC + 6chDAC + 8chSRC
1. General Description
The AK7604 is a highly integrated digital signal processor, including a 24-bit stereo ADC with input
selector, three 24-bit stereo DACs, four stereo sampling rate convertors supporting the sampling
frequency up to 192kHz and an Audio DSP. The Audio DSP has 2560step/fs (when fs=48kHz) parallel
processing power and freely programmable for user requirements. The AK7604 is available in a 48-pin
LQFP package.
2. Features □ Audio DSP:
-Word length:
28-bit (Simple floating point supported)
-Instruction cycle:
Max. 8.1ns (2560fs at fs=48kHz)
-Multiplier:
24 x 24 → 48-bit (Double precision arithmetic available)
-Divider:
24 / 24 → 24-bit (Floating point normalization function)
-ALU:
64-bit Arithmetic Operation (with 16bits overflow margin)
-Program RAM:
1024-word x 36-bit
-Coefficient RAM:
1024-word x 24-bit
-Data RAM:
6144-word x 28-bit
□ ADC: 24-bit Stereo ADC with Input Selector
-Sampling Frequency: fs = 8kHz ~ 96kHz
-Input Selector: Differential Stereo Input or Single-end Input or Pseudo Differential Input
with Analog Gain Amplifiers x 1, Single-ended Stereo Input x 2
-Channel Independent Analog Gain Amplifiers (0~18dB(2dB Step), 18~36dB(3dB Step)
-ADC Characteristics
S/N: 106dB (fs=48kHz, Differential Input, Analog Gain=0dB)
-Channel Independent Digital Volume Control (24dB ~ -103dB, 0.5dB Step, Mute)
-Digital HPF for DC Offset Cancelling
-1Vrms Input Full Scale
-Low Noise MIC Power Output x 2
□ DAC: 24-bit DAC
-2ch x 3
-Sampling Frequency: fs = 8kHz ~ 96kHz
-Single-ended Output
-1Vrms Output
-DAC Characteristics
S/N: 108dB (fs=48kHz)
-Channel Independent Digital Volume Control (12dB ~ -115dB, 0.5dB Step, Mute)
□ SRC:
-2ch x 4
-FSI = 8kHz ~ 192kHz, FSO = 8kHz ~ 192kHz (FSO/FSI = 0.167 ~ 6.0)
□ Digital Interfaces
-Digital Input Port x 4 (TDM Support: 1 Port)
-Digital Output Port x 3 (TDM Support: 1 Port)
-Independent LRCK/BICK port x 3
-Data Format: MSB 32, 24bit / LSB 24, 20, 16bit / I2S / PCM Short Frame / PCM Long Frame
-TDM Input/Output Mode (Max: 8ch/256fs, fs=96kHz) 018011601-E-00-PB 2018/09
-1-
