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000-0046140-111
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SLG46140
10.0 8-bit Digital-to-Analog Converter (DAC)
There are two DACs in the SLG46140 (DAC0 and DAC1), they are 8-bit Digital to Analog Converters which operate at a maximum
sampling speed of 100 ksps. The DAC's DNL is less than 1LSB and INL is less than 1LSB. DAC output to PIN resistance is 1 k
.
Load resistance is recommended to be no less than 10 k
; load capacitance is recommended to be no more than 100 pF.
User controlled inputs and outputs of the DAC are listed below:
DAC0 Inputs:
•
Registers
•
8LSBs SPI
•
FSM0<7:0>
•
FSM1<7:0>
DAC0 Outputs:
•
PIN3
•
PGA negative input (00: 0 V; FF: 1 V)
•
ACMP0 negative input
•
ACMP1 negative input
DAC1 Inputs:
•
Registers
•
8LSBs SPI
•
FSM0<7:0>
•
FSM1<7:0>
DAC1 Outputs:
•
ACMP0 negative input
•
ACMP1 negative input
If a DAC0 output is connected to external Pin3 of SLG46140's, it is necessary to enable this external pin as analog input/output.
reg <544>: 0 - DAC0 power off, 1 - DAC0 power on. reg <538>: 0 - DAC1 power off, 1 - DAC1 power on.
Please note that DAC1 is shared with ADC macrocell. Therefore it is impossible to use DAC1, when ADC is used. Also to activate
DAC1, DAC0 must be enabled (reg <544> = 1 and reg <538> = 1). In addition, DAC0 is used as a part of pseudo-differential
mode of PGA macrocell. Therefore DAC0 is not available when PGA is in pseudo-differential mode.
Содержание GreenPAK SLG46140
Страница 102: ...000 0046140 111 Page 101 of 169 SLG46140 14 1 Initial Polarity Operations Figure 54 DFF Polarity Operations ...
Страница 103: ...000 0046140 111 Page 102 of 169 SLG46140 Figure 55 DFF Polarity Operations with nReset ...
Страница 104: ...000 0046140 111 Page 103 of 169 SLG46140 Figure 56 DFF Polarity Operations with nSet ...