參數(shù)資料
型號(hào): μPD784035(A)
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位單片微控制器)
中文描述: 8 / 16位單片機(jī)微控制器(8 / 16位單片微控制器)
文件頁(yè)數(shù): 36/90頁(yè)
文件大小: 402K
代理商: ΜPD784035(A)
μ
PD784035(A), 784036(A)
36
7.7 D/A Converter
Two digital/analog (D/A) converter channels of voltage output type, having a resolution of 8 bits, are incorporated.
An R-2R resistor ladder system is used for conversion. By writing the value to be subject to D/A conversion in
the 8-bit D/A conversion value setting register (DACSn: n = 0, 1), the resulting analog value is output on ANOn
(n = 0, 1). The range of the output voltages is determined by the voltages applied to the AV
REF2
and AV
REF3
pins.
Because of its high output impedance, no current can be obtained from an output pin. When the load impedance
is low, insert a buffer amplifier between the load and the converter.
The impedance of the ANOn pin goes high while the RESET signal is low. DACSn is set to 0 after a reset
is released.
Figure 7-8. Block Diagram of D/A Converter
Selector
Internal bus
DACSn
DACEn
2R
2R
2R
2R
AV
REF3
AV
REF2
R
R
R
ANOn
Remark
n = 0, 1
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