參數(shù)資料
型號: M3826AMFA-XXXGP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, LQFP-100
文件頁數(shù): 86/95頁
文件大?。?/td> 1006K
代理商: M3826AMFA-XXXGP
Rev.2.00
May. 24, 2006
page 85 of 90
REJ03B0028-0200
3826 Group (A version)
3.3.10 Notes on D/A converter
(1)
Pin states at reset
The P56/DA1 pin and the P57/ADT/DA2 pin go to high impedance state at reset.
(2)
Connecting low-impedance device
The DAi output pin have no buffer, so connect an external buffer when driving a low-impedance
load.
(3)
Reference voltage input pin VREF
When the P56/DA1 pin and the P57/ADT/DA2 pin are used as DAi output pins, the Vcc level is
recommended for the applied voltage to the VREF pin. When the voltage below Vcc level is
applied, the D/A conversion accuracy may be worse.
Connect an approximately 1000 pF capacitor across the AVss pin and the VREF pin. Besides,
connect the capacitor across the VREF pin and the AVss pin at equal length as close as possible.
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