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STM32MP151A bảng dữ liệu(PDF) 199 Page - STMicroelectronics |
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STM32MP151A bảng dữ liệu(HTML) 199 Page - STMicroelectronics |
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199 / 245 page  DS12500 Rev 1 199/245 STM32MP151A Electrical characteristics 228 Figure 39. 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. SINAD Signal-to- noise and distortion ratio(6) DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz - 67.5 - dB ENOB Effective number of bits DAC output buffer ON, CL ≤ 50 pF, RL ≥ 5 kΩ, 1 kHz - 10.9 - bits 1. Guaranteed by characterization. 2. Difference between two consecutive codes minus 1 LSB. 3. Difference between measured the value 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 76. DAC accuracy (continued) Symbol Parameter Conditions Min Typ(1) 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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