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STM32U545NET3QTR Datasheet(PDF) 227 Page - STMicroelectronics |
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STM32U545NET3QTR Datasheet(HTML) 227 Page - STMicroelectronics |
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227 / 283 page  DS14216 Rev 1 227/283 STM32U545xx Electrical characteristics 258 See Figure 37: ADC accuracy characteristics, Figure 38: Typical connection diagram when using the ADC with FT/TT pins featuring analog switch function and General PCB design guidelines. 6 bits (cont’d) 470 49 3.5 3.5 680 61 1000 79 7.5 1500 106 7.5 2200 146 12.5 3300 207 4700 286 12.5 19.5 6800 404 19.5 39.5 10000 584 39.5 22000 1250 79.5 79.5 33000 1853 814.5 47000 2607 814.5 1. Specified by design. Not tested in production. 2. BOOSTEN and ANASWVDD configured properly according to VDD and VDDA values. 3. Values without external capacitor. Table 107. Maximum RAIN for 12-bit ADC4(1)(2)(3) (continued) Resolution RAIN max (Ω) Sampling time [ns] Sampling cycle at 35 MHz Sampling cycle at 55 MHz Table 108. 12-bit ADC4 accuracy(1)(2) (3) Symbol Parameter Conditions Min Typ Max Unit ET Total unadjusted error - - ±3 ±7.5 LSB EO Offset error - - ±2 ±5.5 EG Gain error - - ±2 ±6.5 ED Differential linearity error - - -0.9/+1 -0.9/+1.5 EL Integral linearity error - - ±2 ±3.5 ENOB Effective number of bits - 9.9 10.9 - bits SINAD Signal-to-noise and distortion ratio - 61.4 67.4 - dB SNR Signal-to-noise ratio - 61.6 67.5 - THD Total harmonic distortion - - -74 -70 1. Evaluated by characterization for BGA packages. Not tested in production. The values for LQFP packages may differ. 2. ADC DC accuracy values are measured after the internal calibration. 3. The I/O analog switch voltage booster is enabled when VDDA < 2.4 V (BOOSTEN = 1 in SYSCFG_CFGR1 when VDDA < 2.4 V). This switch is disabled when VDDA ≥ 2.4 V. Resolution = 12 bits, no oversampling. |
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