</a>放大器" title="放大器">放大器" title="放大器">放大器和LDO的24位立體聲CODEC,具有錄音功能,播放功能和視頻功能,主時(shí)鐘有PLL和外接時(shí)鐘兩種模式,MIC放大器具有+21dB/+18dB/+16dB/+14dB/+8dB/0dB增益,數(shù)字自動(dòng)音量控制(ALC),模擬電源(AVDD)2.8V-3.6V,數(shù)字電源(DVDD)1.6V-2.0V,適合于具有錄音/播放功能的手提設(shè)備.本文介紹了AK4957主要特性,框圖, 立體聲和單聲道數(shù)字MIC連接圖,以及評(píng)估板AKD4957-B功能,框圖,電路圖和PCB布局圖.
The AK4957 is a 24bit stereo CODEC with a microphone, speaker, video amplifiers and LDO. The input circuits include a microphone amplifier and the output circuits include a speaker amplifier. It is suitable for portable application with recording/playback function. A one channel composite In/Out video amplifier is also integrated. The AK4957 is available in a small 32pin QFN (4mm x 4mm, 0.4mm pitch), saving mounting area on the board.
AK4957主要特性:
1. Recording Functions
• Stereo Single-ended input with two Selectors
• MIC Amplifier (+21dB/+18dB/+16dB/+14dB/+8dB/0dB)
• Digital ALC (Automatic Level Control) (Setting Range: +36dB ∼ −54dB, 0.375dB Step)
• ADC Performance: S/(N+D): 83dB, DR, S/N: 88dB (MIC-Amp=+18dB)S/(N+D): 85dB, DR, S/N: 96dB (MIC-Amp=0dB)
• Microphone Sensitivity Compensation
• 5 Band Notch Filter
• Stereo Separation Emphasis Circuit
• Digital MIC Interface 2. Playback Functions
• Soft Mute
• Digital ALC (Automatic Level Control)(Setting Range: +36dB ~ −54dB, 0.375dB Step)
• Digital Volume Control (+12dB ~ −115dB, 0.5dB Step & Mute)
• Stereo Separation Emphasis Circuit
• Stereo Line Output
- Output Voltage: 1Vrms (AVDD= 3.3V)
- S/(N+D): 85dB
- S/N: 92dB
• Mono Mixing Output
• Mono Speaker-Amplifier
- S/(N+D): 65dB@150mW, 60dB@250mW,
- S/N: 90dB
- BTL Output
- Output Power: 400mW@8Ω (AVDD=3.3V)
• Analog Mixing: BEEP Input
3. Master Clock:
(1) PLL Mode
• Frequencies: 11.2896MHz, 12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)32fs or 64fs (BICK pin)(2) External Clock Mode
• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)Output Master Clock Frequency: 32fs/64fs/128fs/256fs
4. Sampling Frequencies
• PLL Slave Mode (MCKI pin):8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• PLL Master Mode:8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• EXT Master/Slave Mode:
7.35kHz ~ 48kHz (256fs), 7.35kHz ∼ 48kHz (512fs), 7.35kHz ∼ 13kHz (1024fs)
5. μP I/F: 3-wire Serial, I2C Bus (Ver 1.0, 400kHz Fast-Mode)
6. Master/Slave Mode
7. Audio Interface Format: MSB First, 2’s complement
• ADC: 24bit MSB justified, 16/24bit I2S
• DAC: 24bit MSB justified, 16bit LSB justified, 24bit LSB justified, 24bit I2S
8. Video Functions
• One Composite Signal Input
• Video Amplifier for Composite Signal Output Gain: +6 / +9 / +12 / +16.5dB
• Low Pass Filter
9. Ta = −30 ∼ 85℃
10. Power Supply:
• Analog Power Supply (AVDD): 2.8 ~ 3.6V
• Digital Power Supply (DVDD): 1.6 ~ 2.0V
• Digital I/O Power Supply (TVDD): 1.6 or DVDD – 0.2 ~ 3.6V
Package: 32pin QFN (4.0 x 4.0 mm, 0.4mm pitch)
圖1. AK4957框圖
圖2. AK4957立體聲數(shù)字MIC連接案例圖
圖3. AK4957單聲道數(shù)字MIC連接案例圖
圖4. AK4957系統(tǒng)連接圖
評(píng)估板AKD4957-B
The AKD4957-B is an evaluation board for AK4957, 24bit stereo CODEC with a microphone/ speaker/ video amplifiers, and LDO. The AKD4957-B can control various settings using the USB port, can be easily evaluated. Also features a USB Audio device, the audio signal can be input through the USB port from PC. The AKD4957-B has the Digital Audio I/F and can achieve the interface with digital audio systems via optical connector. AKD4957-B is equipped with Line output, Mic input and Headphone output terminals. Has also carried Flash ROM, a stand-alone operation is possible.
評(píng)估板AKD4957-B功能:
• DIR/DIT with optical input/output
• With USB-Audio device
• Equipped with three digital audio interface
- Optical Input / Output
- USB Input
- 10-pin header for external interfaces
• USB port for board control
圖5.評(píng)估板AKD4957-B框圖
圖6.評(píng)估板AKD4957-B電路圖(1)
圖7.評(píng)估板AKD4957-B電路圖(2)
圖8.評(píng)估板AKD4957-B電路圖(3)
圖9.評(píng)估板AKD4957-B電路圖(4)
圖10.評(píng)估板AKD4957-B電路圖(5)
圖11.評(píng)估板AKD4957-B電路圖(6)
圖12.評(píng)估板AKD4957-B布局圖(1)
圖13.評(píng)估板AKD4957-B布局圖(2)
圖14.評(píng)估板AKD4957-B布局圖(3)
圖15.評(píng)估板AKD4957-B布局圖(4)
圖16.評(píng)估板AKD4957-B布局圖(5)
圖17.評(píng)估板AKD4957-B布局圖(6)
圖18.評(píng)估板AKD4957-B布局圖(7)
詳情請(qǐng)見(jiàn):
http://www.asahi-kasei.co.jp/akm/en/product/ak4957/ak4957_f00e.pdf
和
http://www.asahi-kasei.co.jp/akm/en/product/ak4957/akd4957-b0-00e.pdf
The AK4957 is a 24bit stereo CODEC with a microphone, speaker, video amplifiers and LDO. The input circuits include a microphone amplifier and the output circuits include a speaker amplifier. It is suitable for portable application with recording/playback function. A one channel composite In/Out video amplifier is also integrated. The AK4957 is available in a small 32pin QFN (4mm x 4mm, 0.4mm pitch), saving mounting area on the board.
AK4957主要特性:
1. Recording Functions
• Stereo Single-ended input with two Selectors
• MIC Amplifier (+21dB/+18dB/+16dB/+14dB/+8dB/0dB)
• Digital ALC (Automatic Level Control) (Setting Range: +36dB ∼ −54dB, 0.375dB Step)
• ADC Performance: S/(N+D): 83dB, DR, S/N: 88dB (MIC-Amp=+18dB)S/(N+D): 85dB, DR, S/N: 96dB (MIC-Amp=0dB)
• Microphone Sensitivity Compensation
• 5 Band Notch Filter
• Stereo Separation Emphasis Circuit
• Digital MIC Interface 2. Playback Functions
• Soft Mute
• Digital ALC (Automatic Level Control)(Setting Range: +36dB ~ −54dB, 0.375dB Step)
• Digital Volume Control (+12dB ~ −115dB, 0.5dB Step & Mute)
• Stereo Separation Emphasis Circuit
• Stereo Line Output
- Output Voltage: 1Vrms (AVDD= 3.3V)
- S/(N+D): 85dB
- S/N: 92dB
• Mono Mixing Output
• Mono Speaker-Amplifier
- S/(N+D): 65dB@150mW, 60dB@250mW,
- S/N: 90dB
- BTL Output
- Output Power: 400mW@8Ω (AVDD=3.3V)
• Analog Mixing: BEEP Input
3. Master Clock:
(1) PLL Mode
• Frequencies: 11.2896MHz, 12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)32fs or 64fs (BICK pin)(2) External Clock Mode
• Frequencies: 256fs, 512fs or 1024fs (MCKI pin)Output Master Clock Frequency: 32fs/64fs/128fs/256fs
4. Sampling Frequencies
• PLL Slave Mode (MCKI pin):8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• PLL Master Mode:8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
• EXT Master/Slave Mode:
7.35kHz ~ 48kHz (256fs), 7.35kHz ∼ 48kHz (512fs), 7.35kHz ∼ 13kHz (1024fs)
5. μP I/F: 3-wire Serial, I2C Bus (Ver 1.0, 400kHz Fast-Mode)
6. Master/Slave Mode
7. Audio Interface Format: MSB First, 2’s complement
• ADC: 24bit MSB justified, 16/24bit I2S
• DAC: 24bit MSB justified, 16bit LSB justified, 24bit LSB justified, 24bit I2S
8. Video Functions
• One Composite Signal Input
• Video Amplifier for Composite Signal Output Gain: +6 / +9 / +12 / +16.5dB
• Low Pass Filter
9. Ta = −30 ∼ 85℃
10. Power Supply:
• Analog Power Supply (AVDD): 2.8 ~ 3.6V
• Digital Power Supply (DVDD): 1.6 ~ 2.0V
• Digital I/O Power Supply (TVDD): 1.6 or DVDD – 0.2 ~ 3.6V
Package: 32pin QFN (4.0 x 4.0 mm, 0.4mm pitch)
圖1. AK4957框圖
圖2. AK4957立體聲數(shù)字MIC連接案例圖
圖3. AK4957單聲道數(shù)字MIC連接案例圖
圖4. AK4957系統(tǒng)連接圖
評(píng)估板AKD4957-B
The AKD4957-B is an evaluation board for AK4957, 24bit stereo CODEC with a microphone/ speaker/ video amplifiers, and LDO. The AKD4957-B can control various settings using the USB port, can be easily evaluated. Also features a USB Audio device, the audio signal can be input through the USB port from PC. The AKD4957-B has the Digital Audio I/F and can achieve the interface with digital audio systems via optical connector. AKD4957-B is equipped with Line output, Mic input and Headphone output terminals. Has also carried Flash ROM, a stand-alone operation is possible.
評(píng)估板AKD4957-B功能:
• DIR/DIT with optical input/output
• With USB-Audio device
• Equipped with three digital audio interface
- Optical Input / Output
- USB Input
- 10-pin header for external interfaces
• USB port for board control
圖5.評(píng)估板AKD4957-B框圖
圖6.評(píng)估板AKD4957-B電路圖(1)
圖7.評(píng)估板AKD4957-B電路圖(2)
圖8.評(píng)估板AKD4957-B電路圖(3)
圖9.評(píng)估板AKD4957-B電路圖(4)
圖10.評(píng)估板AKD4957-B電路圖(5)
圖11.評(píng)估板AKD4957-B電路圖(6)
圖12.評(píng)估板AKD4957-B布局圖(1)
圖13.評(píng)估板AKD4957-B布局圖(2)
圖14.評(píng)估板AKD4957-B布局圖(3)
圖15.評(píng)估板AKD4957-B布局圖(4)
圖16.評(píng)估板AKD4957-B布局圖(5)
圖17.評(píng)估板AKD4957-B布局圖(6)
圖18.評(píng)估板AKD4957-B布局圖(7)
詳情請(qǐng)見(jiàn):
http://www.asahi-kasei.co.jp/akm/en/product/ak4957/ak4957_f00e.pdf
和
http://www.asahi-kasei.co.jp/akm/en/product/ak4957/akd4957-b0-00e.pdf
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