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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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STM32F429NET6TR Arkusz danych(PDF) 162 Page - STMicroelectronics |
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STM32F429NET6TR Arkusz danych(HTML) 162 Page - STMicroelectronics |
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162 / 231 page  Electrical characteristics STM32F427xx STM32F429xx 162/231 DocID024030 Rev 6 Figure 54. 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. tSETTLING(4) Settling time (full scale: for a 10-bit input code transition between the lowest and the highest input codes when DAC_OUT reaches final value ±4LSB -3 6 µs CLOAD ≤ 50 pF, RLOAD ≥ 5 kΩ THD(4) Total Harmonic Distortion Buffer ON -- - dB CLOAD ≤ 50 pF, RLOAD ≥ 5 kΩ Update rate(2) Max frequency for a correct DAC_OUT change when small variation in the input code (from code i to i+1LSB) -- 1 MS/s CLOAD ≤ 50 pF, RLOAD ≥ 5 kΩ tWAKEUP(4) Wakeup time from off state (Setting the ENx bit in the DAC Control register) -6.5 10 µs CLOAD ≤ 50 pF, RLOAD ≥ 5 kΩ input code between lowest and highest possible ones. PSRR+ (2) Power supply rejection ratio (to VDDA) (static DC measurement) - –67 –40 dB No RLOAD, CLOAD = 50 pF 1. VDDA minimum value of 1.7 V is obtained with the use of an external power supply supervisor (refer to Section 3.17.2: Internal reset OFF). 2. Guaranteed by design. 3. The quiescent mode corresponds to a state where the DAC maintains a stable output level to ensure that no dynamic consumption occurs. 4. Guaranteed by characterization. Table 85. DAC characteristics (continued) Symbol Parameter Min Typ Max Unit Comments |
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