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STM32U545NET3QTR 数据表(PDF) 239 Page - STMicroelectronics |
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STM32U545NET3QTR 数据表(HTML) 239 Page - STMicroelectronics |
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239 / 283 page ![]() DS14216 Rev 1 239/283 STM32U545xx Electrical characteristics 258 PGA gain(3) Non-inverting gain value PGA_GAIN[1:0] = 00 - 2 - - PGA_GAIN[1:0] = 01 - 4 - PGA_GAIN[1:0] = 10 - 8 - PGA_GAIN[1:0] = 11 - 16 - Rnetwork R2/R1 internal resistance values in non-inverting PGA mode(5) PGA gain = 2 - 80/80 - kΩ/ kΩ PGA gain = 4 - 120/40 - PGA gain = 8 - 140/20 - PGA gain = 16 - 150/10 - Delta R Resistance variation (R1 or R2) --18 - 18 % PGA gain error PGA gain error - -1 - 1 PGA BW PGA bandwidth for different non inverting gain PGA gain = 2 - GBW/2 - MHz PGA gain = 4 - GBW/4 - PGA gain = 8 - GBW/8 - PGA gain = 16 - GBW/16 - en Voltage noise density Normal mode At 1 kHz, output loaded with 3.9 kΩ -220 - nV /√Hz Low-power mode At 1 kHz, output loaded with 20 kΩ -350 - Normal mode At 10 kHz, output loaded with 3.9 kΩ -190 - Low-power mode at 10 kHz, output loaded with 20 kΩ -210 - IDDA(OPAMP) OPAMP consumption from VDDA Normal mode no load, quiescent mode, standard speed - 130 190 µA Low-power mode -40 58 Normal mode no load, quiescent mode, high-speed mode - 138 205 Low-power mode -42 60 1. Specified by design and not tested in production, unless otherwise specified. 2. OPA_RANGE must be set to 1 in OPAMP1_CSR. 3. Evaluated by characterization. Not tested in production. 4. Mostly I/O leakage when used in analog mode. Refer to Ilkg parameter in Table 93: I/O static characteristics. 5. R2 is the internal resistance between the OPAMP output and the OPAMP inverting input. R1 is the internal resistance between the OPAMP inverting input and ground. PGA gain = 1 + R2/R1. Table 117. OPAMP characteristics(1)(2) (continued) Symbol Parameter Conditions Min Typ Max Unit |
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