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STM32H747AI 데이터시트(PDF) 199 Page - STMicroelectronics

부품명 STM32H747AI
상세설명  Dual 32-bit Arm® Cortex®-M7 up to 480MHz and -M4 MCUs, up to 2MB Flash, 1MB RAM, 46 com. and analog interfaces, SMPS, DSI
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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STM32H747AI 데이터시트(HTML) 199 Page - STMicroelectronics

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DS12930 Rev 1
189/242
STM32H747xI/G
Electrical characteristics
221
Figure 48. 12-bit buffered /non-buffered DAC
1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external loads directly
without the use of an external operational amplifier. The buffer can be bypassed by configuring the BOFFx bit in the
DAC_CR register.
ENOB
Effective number of
bits
DAC output buffer ON,
CL ≤ 50 pF, RL ≥ 5 ㏀ , 1 kHz
-
10.9
-
bits
DAC output buffer OFF,
CL ≤ 50 pF, no RL, 1 kHz
-
10.9
-
1. Guaranteed by characterization.
2. Difference between two consecutive codes minus 1 LSB.
3. Difference between the value measured at Code i and the value measured at Code i on a line drawn between Code 0 and
last Code 4095.
4. Difference between the value measured at Code (0x001) and the ideal value.
5. Difference between the ideal slope of the transfer function and the measured slope computed from code 0x000 and 0xFFF
when the buffer is OFF, and from code giving 0.2 V and (VREF+ - 0.2 V) when the buffer is ON.
6. Signal is −0.5dBFS with Fsampling=1 MHz.
Table 102. DAC accuracy(1) (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
R L
C L
Buffered/Non-buffered DAC
DAC_OUTx
Buffer(1)
12-bit
digital to
analog
converter
ai17157V3



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