51.19 Analog-to-Digital Converter (ADC) Electrical Specifications
AC CHARACTERISTICS | Standard
Operating Conditions: VDDREG = VDDIO = AVDD 1.71V to 3.63V (unless
otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
Device Supply | |||||||
ADC_1 | AVDD | ADC Module Supply | AVDD(min) | — | AVDD(max) | V | VDDIOx = AVDD |
Reference Inputs | |||||||
ADC_3 | VREF(4) | ADC Reference Voltage (4) | The greater of ≥ AVDD(min) or 2.4V (4) | — | AVDD | V | VREF ≤ AVDD |
Analog Input Range | |||||||
ADC_7 | AFS | Full-Scale Analog Input Signal Range (Single-Ended) | AVSS | — | VREF | V | VREF = AVDD(max) |
ADC_9 | Full-Scale Analog Input Signal Range (Differential) | -VREF | — | VREF | V | ||
Note:
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AC CHARACTERISTICS | Standard
Operating Conditions: VDDREG = VDDIO = AVDD 1.71V to 3.63V (unless
otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
SINGLE ENDED MODE ADC Accuracy | |||||||
SADC_11 | Res | Resolution | 8 | — | 12 | bits | Selectable 8, 10, 12 bit Resolution Ranges |
SADC_13 | INL (3) | Integral Nonlinearity | -2 | ±1.25 | 2 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
SADC_19 | DNL (3) | Differential Nonlinearity | -1 | -0.75 / +1 | 2 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
SADC_25 | GERR (3,6) | Gain Error | -5 | — | -1 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
SADC_31 | E0FF (3,6) | 0ffset Error | 1 | — | 4 | LSB | 3.125 Msps Internal VREF = AVDD = VDDIO = 3.3V |
SINGLE ENDED MODE ADC Dynamic Performance (1,2) | |||||||
SADC_43 | EN0B (3) | Effective Number of bits | 10.6 | 11.2 | — | bits | VREF = AVDD = VDDIO = 3.3V @ 12 bit at 3.125 Msps |
SADC_45 | SINAD (1,2,3) | Signal to Noise and Distortion | 65 | 70 | — | dB | |
SADC_47 | SNR (1,2,3) | Signal to Noise ratio | 65 | 70 | — | ||
SADC_51 | THD (1,2,3,5) | Total Harmonic Distortion | — | -80 | -75 | ||
Note:
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AC CHARACTERISTICS | Standard
Operating Conditions: VDDREG = VDDIO = AVDD 1.71V to 3.63V (unless
otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
DIFFERENTIAL MODE ADC Accuracy | |||||||
DADC_11 | Res | Resolution | 8 | — | 12 | bits | Selectable 8, 10, 12 bit Resolution Ranges |
DADC_13 | INL (3) | Integral Nonlinearity | -2 | ±1.25 | 2 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
DADC_19 | DNL (3) | Differential Nonlinearity | -1 | -0.75 / +1 | 2 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
DADC_25 | GERR (3,6) | Gain Error | -5 | — | -1 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
DADC_31 | E0FF (3,6) | 0ffset Error | 1 | — | 2 | LSB | 3.125 Msps, Internal VREF = AVDD = VDDIO = 3.3V |
DIFFERENTIAL MODE ADC Dynamic Performance (1,2) | |||||||
DADC_43 | EN0B (3) | Effective Number of bits | 11.2 | 11.4 | — | bits | VREF = AVDD = VDDIO = 3.3V @ 12 bit at 3.125 Msps |
DADC_45 | SINAD (1,2,3) | Signal to Noise and Distortion | 68 | 70 | — | dB | |
DADC_47 | SNR (1,2,3) | Signal to Noise ratio | 68 | 70 | — | ||
DADC_51 | THD (1,2,3,5) | Total Harmonic Distortion | — | -84 | -80 | ||
Note:
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AC CHARACTERISTICS | Standard
Operating Conditions: VDDREG = VDDIO = AVDD 1.71V to 3.63V (unless
otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial | ||||||
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Param. No. | Symbol | Characteristics | Min. | Typ. | Max. | Units | Conditions |
ADC Clock Requirements | |||||||
ADC_53 | TAD | ADC Clock Period | 20 | — | 7145 | ns | VREF = AVDD = 3.3V and Res = 6, 8, 10 bit |
20 | — | 1250 | ns | VREF = AVDD = 3.3V and Res = 12 bit | |||
ADC_55 | fGCLK_ADCx | ADCx Module GCLK max input freq | — | — | FCLK_51 | MHz | VREF = AVDD = 3.3V |
ADC Throughput Rates | |||||||
ADC_57 | FTPR (1) | Sample-Rate for ADC with SAMC=1 (min) | — | — | 3.125 | Msps | 12-bit resolution, Rsource Impedance ≤ 200 Ω |
— | — | 3.571429 | 10-bit resolution, Rsource Impedance ≤ 250 Ω | ||||
— | — | 4.166667 | 8-bit resolution, Rsource Impedance ≤ 300 Ω | ||||
— | — | 5 | 6-bit resolution, Rsource Impedance ≤ 400 Ω | ||||
ADC Conversion and Sample Time | |||||||
ADC_59 | TSAMP | Sample-Time for ADC | 3 | — | — | TAD | 12 bit TAD(min), Ext Analog Input Rsource ≤ 200 Ω, Max ADC Clock |
3 | 10 bit TAD(min), Ext Analog Input Rsource ≤ 250 Ω, Max ADC Clock | ||||||
8 | — | — | 12 bit TAD(min), Ext Analog Input Rsource ≤ 500 Ω, Max ADC Clock | ||||
8 | 10 bit TAD(min), Ext Analog Input Rsource ≤ 700 Ω, Max ADC Clock | ||||||
14 | — | — | 12 bit TAD(min), Ext Analog Input Rsource ≤ 1 kΩ, Max ADC Clock | ||||
14 | 10 bit TAD(min), Ext Analog Input Rsource ≤ 1.25 kΩ, Max ADC Clock | ||||||
64 | — | — | 12 bit TAD(min), Ext Analog Input Rsource ≤ 5 kΩ, Max ADC Clock | ||||
64 | 10 bit TAD(min), Ext Analog Input Rsource ≤ 5.5 kΩ, Max ADC Clock | ||||||
ADC_61 | TCNV | Conversion Time (after sample time is complete) | 13 | TAD | 12-bit resolution | ||
11 | 10-bit resolution | ||||||
9 | 8-bit resolution | ||||||
7 | 6-bit resolution | ||||||
ADC_63 | Twarm-up | Warm Up Time after CTRLA.ANAEN = 1 and CTRLA.ENABLE = 1 | — | — | 500 TAD or 20 µs, which ever is bigger | µs | |
Note:
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