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STM32L151VBT6DTR 数据表(PDF) 91 Page - STMicroelectronics |
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STM32L151VBT6DTR 数据表(HTML) 91 Page - STMicroelectronics |
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91 / 121 page ![]() STM32L151x6/8/B, STM32L152x6/8/B Electrical characteristics Doc ID 17659 Rev 8 91/121 tS Sampling time Direct channels 2.4 V ≤ VDDA ≤ 3.6 V 0.25 µs Multiplexed channels 2.4 V ≤ VDDA ≤ 3.6 V 0.56 Direct channels 1.8 V ≤ VDDA ≤ 2.4 V 0.56 Multiplexed channels 1.8 V ≤ VDDA ≤ 2.4 V 1 4 384 1/fADC tCONV Total conversion time (including sampling time) fADC = 16 MHz 1 24.75 µs 4 to 384 (sampling phase) +12 (successive approximation) 1/fADC CADC Internal sample and hold capacitor Direct channels 16 pF Multiplexed channels fTRIG External trigger frequency Regular sequencer 12-bit conversions Tconv+1 1/fADC 6/8/10-bit conversions Tconv 1/fADC fTRIG External trigger frequency Injected sequencer 12-bit conversions Tconv+2 1/fADC 6/8/10-bit conversions Tconv+1 1/fADC RAIN External input impedance 50 k Ω tlat Injection trigger conversion latency fADC = 16 MHz 219 281 ns 3.5 4.5 1/fADC tlatr Regular trigger conversion latency fADC = 16 MHz 156 219 ns 2.5 3.5 1/fADC tSTAB Power-up time 3.5 µs 1. The Vref+ input can be grounded iif neither the ADC nor the DAC are used (this allows to shut down an external voltage reference). 2. The current consumption through VREF is composed of two parameters: - one constant (max 300 µA) - one variable (max 400 µA), only during sampling time + 2 first conversion pulses. So, peak consumption is 300+400 = 700 µA and average consumption is 300 + [(4 sampling + 2) /16] x 400 = 450 µA at 1Msps 3. VREF+ can be internally connected to VDDA and VREF- can be internally connected to VSSA, depending on the package. Refer to Section 4: Pin descriptions for further details. 4. VSSA or VREF- must be tied to ground. Table 54. ADC characteristics (continued) Symbol Parameter Conditions Min Typ Max Unit |
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