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參數(shù)資料
| 型號： | LA6503 |
| 元件分類： | 運動控制電子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 1 A, PQFP34 |
| 封裝： | HQFP-34 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大小： | 118K |
| 代理商： | LA6503 |
Notes on Gain Adjustment (Sled Motor Block)
Gain setting
The sled motor block gain is set using an external resistor as shown below.
For example, when the external resistor R is 22 k
, the gain will be 0 dB when seen as an independent output amplifier
and 6 dB when seen as a BTL circuit (between outputs). Referenced to this 22-k
resistor, the independent output
amplifier gain will be 22k/R (as a multiple) or 20 log(22k/R) dB. Similarly, the BTL gain will be 2
×22k/R
(as a multiple) or 20 log(22k/R) dB + 3 dB. The level shifting circuits used in current models perform both current and
voltage conversion, and thus have a different input type from normal operational amplifiers. The current that flows in
the external resistor, that is, the potential difference, becomes the input to AMP1 and AMP2.
Output offset voltage
The output offset voltage is 1/2 VM (typical). The VO
– and V
O
+ outputs are converted to outputs that are centered on
this voltage.
No. 5791-7/8
LA6503
(Input)
Resistor R
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