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ASAHI KASEI
The AKD4127-A is an evaluation board for AK4127, the digital sample rate converter. The AKD4127-A
has the digital audio interface and can achieve the interface with digital audio system via opt-connector.
Ordering guide
AKD4127-A
---
• DIR/DIT with optical input/output
• 10pin Header for AKM AD/DA evaluation board
Opt In
AK4114
COAX
10pin
Header
DSP
Data
* Circuit diagram and PCB layout are attached at the end of this manual.
<KM085601>
AK4127 Evaluation Board Rev.0
GENERAL DESCRIPTION
AK4127 Evaluation Board
FUNCTION
5V
Regulator
AK4127
Figure 1. AKD4127-A Block Diagram
GND
- 1 -
[AKD4127-A]
AKD4127-A
AK4114
Opt Out
COAX
10pin
Header
DSP
Data
2006/11
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Summary of Contents for AKM AKD4127-A
- Page 1 AKD4127-A AK4127 Evaluation Board Rev.0 GENERAL DESCRIPTION The AKD4127-A is an evaluation board for AK4127, the digital sample rate converter. The AKD4127-A has the digital audio interface and can achieve the interface with digital audio system via opt-connector. Ordering guide...
- Page 2 ASAHI KASEI [AKD4127-A] Operation sequence 1) Set up the power supply lines. [VCC] (Red) = +5V (for regulator) [DGND] (Black) = 0V Each supply line should be distributed from the power supply unit. The regulator can be supplied 3.3V to all circuits.
- Page 3 ASAHI KASEI [AKD4127-A] (2) All clocks are fed through the 10pin port When using PORT2 (INPUT), nothing should be connected to J1 (COAX) and PORT1 (DIR). IBICK SDTI ILRCK • SW3 setting (See Table 2) Upper-side is “H” and lower-side is “L”.
- Page 4 ASAHI KASEI [AKD4127-A] Mode IDIF2 IDIF1 IDIF0 SDTI Format ILRCK IBICK IBICK Freq Master / Slave ≥ 32fsi 16bit, LSB justified ≥ 40fsi 20bit, LSB justified ≥ 48fsi 24/20bit, MSB justified Input Input Slave ≥ 48fsi or 24/16bit, I S Compatible 32fsi ≥...
- Page 5 ASAHI KASEI [AKD4127-A] (2) All clocks are fed through the 10pin port When using PORT3 (OUTPUT), nothing should be connected to J2 (TX) and PORT4 (DIT). OBICK OLRCK • SW4 setting (See Table 6) Upper-side is “H” and lower-side is “L”.
- Page 6 ASAHI KASEI [AKD4127-A] Other jumper pins set up 1. JP1 (RX) : Select of RX input COAX: COAX input. Optical input. <Default> 2. JP5 (CKSO) : AK4114 BICK and LRCK setting BICK: 2.048MHz ∼ 12.288MHz, LRCK: 32kHz ∼ 192kHz BICK: 2.048MHz ∼ 6.144MHz, LRCK: 32kHz ∼ 96kHz <Default>...
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Page 7: Measurement Results
ASAHI KASEI [AKD4127-A] MEASUREMENT RESULTS [Measurement condition] • Measurement unit : Audio Precision, System Two Cascade • Power Supply : AVDD = DVDD = 3.3V • Band width : 20Hz ∼ FSO/2 • Temperature : Room [Measurement Result] SRC Characteristics... - Page 8 ASAHI KASEI [AKD4127-A] [Plot] AK4127 FFT Plot (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], Input Level=0[dBFS], fin=1[KHz] -100 -110 -120 -130 -140 -150 -160 -170 -180 -190 -200 Fig 6. FFT Plot (Input Level= 0[dBFS]) AK4127 FFT Plot (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], Input Level=-60[dBFS], fin=1[KHz]...
- Page 9 ASAHI KASEI [AKD4127-A] AK4127 THD+N vs Input Level (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], fin=1[KHz] -100 -105 -110 -115 -120 -125 -130 -135 -140 -145 -150 -155 -160 -165 -170 -175 -180 -140 -130 -120 -110 -100 dBFS Fig 1. THD+N vs. Input Level AK4127 THD+N vs Input Frequency (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], Input Level=0[dBFS]...
- Page 10 ASAHI KASEI [AKD4127-A] AK4127 THD+N vs Input Frequency (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], Input Level=-60[dBFS] -100 -105 -110 -115 -120 -125 -130 -135 -140 -145 -150 -155 -160 -165 -170 -175 -180 Fig 3. THD+N vs. Input Frequency (Input Level= −60[dBFS]) AK4127 Linearity (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], fin=1[KHz]...
- Page 11 ASAHI KASEI [AKD4127-A] AK4127 Frequency Response (fsi=48[KHz], fso=44.1[KHz]) AVDD=DVDD=3.3[V], Input Level=0[dBFS] +0.5 -0.5 -1.5 -2.5 -3.5 -4.5 -5.5 -6.5 -7.5 Fig 5. Frequency Response AK4127 Frequency Response (fsi=44.1[KHz] (Yellow) / 48[KHz] (Blue) / 96[KHz] (Red) / 192[KHz] (Green), fso=44.1[KHz]) AVDD=DVDD=3.3[V], Input Level=0[dBFS] fsi=44.1kHz...
- Page 12 ASAHI KASEI [AKD4127-A] AK4127 Frequency Response (fsi=48[KHz] (Blue) / 96[KHz] (Red) / 192[KHz] (Green), fso=48[KHz]) AVDD=DVDD=3.3[V], Input Level=0[dBFS] fsi=192kHz fsi=96kHz fsi=48kHz Fig 8. Frequency Response <KM085601> 2006/11 - 12 -...
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Page 13: Important Notice
• It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of, or otherwise places the product with a third party to notify that party in advance of the above content and...
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