[AK2403]
018011679-J-03 2019/09
- 2 -
4. 目 次
1. 概 要 .................................................................................................................................................. 1
2. 特 長 .................................................................................................................................................. 1
3. アプリケーション ............................................................................................................................... 1
4. 目 次 .................................................................................................................................................. 2
5. ブロック図と機能説明 ........................................................................................................................ 4
5.1. ブロック図 ...................................................................................................................................... 4
5.2. 機能説明 .......................................................................................................................................... 4
6. ピン配置と機能説明 ............................................................................................................................ 5
6.1. ピン配置 .......................................................................................................................................... 5
6.2. 機能説明 .......................................................................................................................................... 6
6.3. 未使用ピンの処理 ........................................................................................................................... 8
7. 絶対最大定格 ....................................................................................................................................... 9
8. 推奨動作条件 ....................................................................................................................................... 9
9. 電気的特性 ........................................................................................................................................ 10
9.1. デジタルDC特性 ........................................................................................................................... 10
9.2. デジタルAC特性 ........................................................................................................................... 10
9.2.1. システムリセット .................................................................................................................. 10
9.2.2. レジスタアクセス用シリアルインターフェース ................................................................... 10
9.2.3. DACデータ書き込み用シリアルインターフェース ................................................................ 12
9.3. パワーアップシーケンス .............................................................................................................. 13
9.4. シンセサイザ特性 ......................................................................................................................... 15
9.5. フォワードパス特性 ..................................................................................................................... 17
9.6. フィードバックパス特性 .............................................................................................................. 18
9.7. DAC+SMF特性 .............................................................................................................................. 19
9.8. IDET特性 ....................................................................................................................................... 20
9.9. 消費電流 ........................................................................................................................................ 20
10. 機能説明 ............................................................................................................................................ 22
10.1. パワー制御 .................................................................................................................................. 22
10.2. PLL ............................................................................................................................................... 23
10.2.1. シンセサイザ立ち上げシーケンス ....................................................................................... 23
10.2.2. 周波数設定 ........................................................................................................................... 25
10.2.3. Multiplier & R Divider ............................................................................................................ 25
10.2.4. Charge Pump & Loop Filter .................................................................................................. 26
10.2.5. ファーストロックアップモード ........................................................................................... 27
10.2.6. Lock Detect ........................................................................................................................... 27
10.2.7. VCO ...................................................................................................................................... 28
10.3. DIFFAMP ..................................................................................................................................... 29
10.4. MOD ............................................................................................................................................. 31
10.5. Phase Shifter ............................................................................................................................... 31
10.6. DC Offset Calibration ................................................................................................................... 31
10.7. IDET ............................................................................................................................................. 32
10.8. Loop Switch ................................................................................................................................. 33
11. レジスタマップ ................................................................................................................................. 34
11.1. レジスタマップ ........................................................................................................................... 34
12. レジスタ説明 ..................................................................................................................................... 37
12.1. <0x01~0x03>FRAC ..................................................................................................................... 37
12.2. <0x04~0x06>MOD ...................................................................................................................... 37
12.3. <0x07~0x08>INT ......................................................................................................................... 37
12.4. <0x09>RDIV ................................................................................................................................ 37
12.5. <0x0A~0x0B>CP ......................................................................................................................... 38