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CY8CKIT-059 数据表(PDF) 90 Page - Infineon Technologies AG |
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CY8CKIT-059 数据表(HTML) 90 Page - Infineon Technologies AG |
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90 / 140 page  Document Number: 001-84932 Rev. *N Page 89 of 139 PSoC® 5LP: CY8C58LP Family Datasheet Rin_Buff ADC input resistance Input buffer used 10 – – M Ω Rin_ADC16 ADC input resistance Input buffer bypassed, 16-bit, Range = ±1.024 V –74[46] –k Ω Rin_ADC12 ADC input resistance Input buffer bypassed, 12 bit, Range = ±1.024 V –148[46] –k Ω Rin_ExtRef ADC external reference input resistance – 70[46, 47] –k Ω Vextref ADC external reference input voltage, see also internal reference in Voltage Reference on page 93 Pins P0[3], P3[2] 0.9 – 1.3 V Current Consumption IDD_20 IDDA + IDDD Current consumption, 20 bit[48] 187 sps, unbuffered – – 1.5 mA IDD_16 IDDA + IDDD Current consumption, 16 bit[48] 48 ksps, unbuffered – – 1.5 mA IDD_12 IDDA + IDDD Current consumption, 12 bit[48] 192 ksps, unbuffered – – 1.95 mA IDD_8 IDDA + IDDD Current consumption, 8 bit[48] 384 ksps, unbuffered – – 1.95 mA IBUFF Buffer current consumption[48] –– 2.5 mA Table 11-20. 20-bit Delta-sigma ADC DC Specifications (continued) Parameter Description Conditions Min Typ Max Units Table 11-21. Delta-sigma ADC AC Specifications Parameter Description Conditions Min Typ Max Units Startup time – – 4 Samples THD Total harmonic distortion[48] Buffer gain = 1, 16 bit, Range = ±1.024 V – – 0.0032 % 20-Bit Resolution Mode SR20 Sample rate[48] Range = ±1.024 V, unbuffered 7.8 – 187 sps BW20 Input bandwidth at max sample rate[48] Range = ±1.024 V, unbuffered – 40 – Hz 16-Bit Resolution Mode SR16 Sample rate[48] Range = ±1.024 V, unbuffered 2 – 48 ksps BW16 Input bandwidth at max sample rate[48] Range = ±1.024 V, unbuffered – 11 – kHz SINAD16int Signal to noise ratio, 16-bit, internal reference[48] Range = ±1.024V, unbuffered 81 – – dB TA ≤ 105 °C 77 – – SINAD16ext Signal to noise ratio, 16-bit, external reference[48] Range = ±1.024 V, unbuffered 84 – – dB 12-Bit Resolution Mode SR12 Sample rate, continuous, high power[48] Range = ±1.024 V, unbuffered 4 – 192 ksps BW12 Input bandwidth at max sample rate[48] Range = ±1.024 V, unbuffered – 44 – kHz SINAD12int Signal to noise ratio, 12-bit, internal reference[48] Range = ±1.024 V, unbuffered 66 – – dB 8-Bit Resolution Mode SR8 Sample rate, continuous, high power[48] Range = ±1.024 V, unbuffered 8 – 384 ksps BW8 Input bandwidth at max sample rate[48] Range = ±1.024 V, unbuffered – 88 – kHz SINAD8int Signal to noise ratio, 8-bit, internal reference[48] Range = ±1.024 V, unbuffered 43 – – dB Notes 46. By using switched capacitors at the ADC input an effective input resistance is created. Holding the gain and number of bits constant, the resistance is proportional to the inverse of the clock frequency. This value is calculated, not measured. For more information see the Technical Reference Manual. 47. Recommend an external reference device with an output impedance <100 Ω, for example, the LM185/285/385 family. A 1 µF capacitor is recommended. For more information, see AN61290 - PSoC® 3 and PSoC 5LP Hardware Design Considerations. 48. Based on device characterization (not production tested). |
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