[AK5704]
019000890-J-00 2019/02
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3. 目 次
1. 概 要 ................................................................................................................................................... 1
2. 特 長 ................................................................................................................................................... 1
3. 目 次 ................................................................................................................................................... 2
4. ブロック図 ............................................................................................................................................ 4
5. ピン配置と機能説明 .............................................................................................................................. 5
5.1. ピン配置................................................................................................................................... 5
5.2. 機能説明................................................................................................................................... 6
5.3. システム上使用しないピンの処理について ............................................................................ 7
5.4. パワーダウン時のピン状態 ..................................................................................................... 8
6. 絶対最大定格......................................................................................................................................... 9
7. 推奨動作条件......................................................................................................................................... 9
8. 電気的特性 .......................................................................................................................................... 10
8.1. マイク & ADC アナログ特性 (AVDD=3.3V: AVDDL bit = “0”) .............................................. 10
8.2. マイク & ADC アナログ特性 (AVDD=1.8V: AVDDL bit = “1”) .............................................. 12
8.3. 消費電流................................................................................................................................. 14
8.4. モード別の消費電力 .............................................................................................................. 14
8.5. ADC1/2 ショートディレイシャープロールオフフィルタ (ADVF bit = “0”) .......................... 15
8.6. ADC1/2 ボイス用デジタルフィルタ (ADVF bit = “1”) ........................................................... 16
8.7. DC 特性.................................................................................................................................. 17
8.8. スイッチング特性 .................................................................................................................. 18
9. 機能説明 .............................................................................................................................................. 28
9.1. プルダウン内蔵ピン .............................................................................................................. 28
9.2. LDO回路 ................................................................................................................................ 28
9.3. システムクロック .................................................................................................................. 29
9.4. PLL ......................................................................................................................................... 30
9.5. オーディオインタフェースフォーマット ............................................................................. 38
9.6. オーディオシステムとの同期 (SYNCDET) ........................................................................... 46
9.7. マイク/ライン入力 .............................................................................................................. 47
9.8. マイク用ゲインアンプ ........................................................................................................... 49
9.9. マイクパワー ......................................................................................................................... 50
9.10. MIC入力ピンのスタートアップ時間 ..................................................................................... 51
9.11. ADC1/2 初期化サイクル ........................................................................................................ 51
9.12. モノラル/ステレオ切り替え ................................................................................................ 52
9.13. デジタルマイク ...................................................................................................................... 53
9.14. デジタルブロック .................................................................................................................. 55
9.14.1. 位相調整機能 ................................................................................................................... 56
9.14.2. High Pass Filter (ADC) .................................................................................................... 57
9.14.3. ADC1/2 デジタルフィルタ .............................................................................................. 57
9.14.4. マイク感度補正機能 ........................................................................................................ 58
9.14.5. モノラル(MIX)切り替え ................................................................................................... 58
9.14.6. High Pass Filter (HPF1/2) ............................................................................................... 59
9.14.7. Low Pass Filter (LPF1/2) ................................................................................................. 59
9.14.8. ALC動作 .......................................................................................................................... 60
9.14.9. 入力デジタルボリューム (マニュアルモード時) ............................................................ 65
9.14.10. ALC 4ch Link Mode シーケンス ...................................................................................... 66
9.15. 音声検知機能 ......................................................................................................................... 67
9.15.1. VDLY ............................................................................................................................... 68
9.15.2. HPF, LPF ......................................................................................................................... 68
9.15.3. ABS .................................................................................................................................. 69
9.15.4. NLD (Noise Level Detector) ............................................................................................ 70