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STM32L151VD 数据表(PDF) 119 Page - STMicroelectronics |
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STM32L151VD 数据表(HTML) 119 Page - STMicroelectronics |
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119 / 140 page  STM32L151xD STM32L152xD Electrical characteristics Doc ID 022027 Rev 6 119/140 Figure 40. 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. 6.3.21 Operational amplifier characteristics 6. Difference between the value measured at Code (0x001) and the ideal value. 7. Difference between ideal slope of the transfer function and measured slope computed from code 0x000 and 0xFFF when buffer is OFF, and from code giving 0.2 V and (VDDA – 0.2) V when buffer is ON. 8. In buffered mode, the output can overshoot above the final value for low input code (starting from min value). R LOAD C LOAD Buffered/Non-buffered DAC DAC_OUTx Buffer(1) 12-bit digital to analog converter ai17157V2 Table 68. Operational amplifier characteristics Symbol Parameter Condition(1) Min(2) Typ Max(2) Unit CMIR Common mode input range 0 - VDD VIOFFSET Input offset voltage Maximum calibration range -- ±15 mV After offset calibration -- ±1.5 ΔVIOFFSET Input offset voltage drift Normal mode - - ±40 µV/°C Low power mode - - ±80 IIB Input current bias Dedicated input 75 °C -- 1 nA General purpose input -- 10 ILOAD Drive current Normal mode - - 500 µA Low power mode - - 100 IDD Consumption Normal mode No load, quiescent mode - 100 220 µA Low power mode - 30 60 CMRR Common mode rejection ration Normal mode - -85 - dB Low power mode - -90 - PSRR Power supply rejection ratio Normal mode DC --85 - dB Low power mode - -90 - |
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