46.18 ADC Electrical Specifications

Table 46-20. ADC Electrical Specifications
AC CHARACTERISTICS Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No. Symbol Characteristics Min. Typ. Max. Units Conditions
Device Supply
ADC_1 AVDD ADC Module Supply 2.7V 5.5V V VDD = VDDIO
Reference Inputs
ADC_3 VREF(1) ADC Reference Voltage 2.7V AVDD V VREF = AVDD (REFCTRL.REFSEL = 0x5)
2.4V AVDD-0.6V V AVDD ≥ VREF + 0.6V

VREF = INTREF (REFCTRL.REFSEL = 0x0)

VREF = AVDD / 1.6 (REFCTRL.REFSEL = 0x1)

VREF = AVDD / 2 (REFCTRL.REFSEL = 0x2)

VREF = VREFA pin (REFCTRL.REFSEL = 0x3)

VREF = DAC output (REFCTRL.REFSEL = 0x4)

Analog Input Range
ADC_7 AFS Full-Scale Analog Input Signal Range (Single-Ended) AVSS VREF V
ADC_9 Full-Scale Analog Input Signal Range (Differential) -VREF VREF V
ADC_10 VCMIN Input common mode voltage 0.2 VREF-0.2 V CTRLC.R2R = 1
VREF/2 - 0.2 VREF/2 + 0.2 V CTRLC.R2R = 0
ADC_11 TSETTLING ADC Stabilization Time 10 µs CTRLA.ENABLE=1 or CTRLA.ONDEMAND=1
Note:
  1. ADC functional device operation with either internal or external VREF<2.4V is functional, but not characterized. ADC will function, but with degraded accuracy of approximately ~((0.06 * 2^n) / VREF), where "n"= number of bits. ADC accuracy is limited by internal VREF accuracy + drift, MCU generated noise plus users application noise/accuracy on AVDD, AVSS.
Table 46-21. Single Ended Mode ADC Electrical Specifications
AC CHARACTERISTICS Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

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_13a ENOB (3) Effective Number of bits 9.4 bits 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

SADC_13b 9.4 bits 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

SADC_13c 9.4 bits 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V

SADC_13d 8.8 bits 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V

SADC_19 INL (3) Integral Non-linearity -4.5 4.5 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

SADC_19b -4.2 4.2 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

SADC_19c -4.2 4.2 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V (6)

SADC_19d -6.5 6.5 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

SADC_25a DNL (3) Differential Non-linearity -0.99 1.5 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

SADC_25b -0.99 1.6 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

SADC_25c -0.99 1.5 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V (6)

SADC_25d -0.99 2.1 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

SADC_31a GERR (3) Gain Error -13.0 2.7 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

SADC_31b -13.3 3.5 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

SADC_31c -31.6 18.6 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V (6)

SADC_31d -247.5 89.1 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

SADC_37a EOFF (3) Offset Error -31.6 39.3 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

SADC_37b -29.1 45.7 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

SADC_37c -30.1 44.7 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V (6)

SADC_37d -28.4 42.7 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

SADC_43a TUE (3) Total Unadjusted Error 3.2 20.1 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

SADC_43b 2.7 25.8 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

SADC_43c 3.1 25.4 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V (6)

SADC_43d 13.7 135 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

SINGLE ENDED MODE ADC Dynamic Performance (1,2,3)
SADC_49a SINAD Signal to Noise and Distortion 58 dB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

SADC_49b 58 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

SADC_49c 58 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V

SADC_49d 54 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V

SADC_51a SNR Signal to Noise ratio 59 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

SADC_51b 59 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

SADC_51c 59 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V

SADC_51d 54 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V

SADC_53a SFDR Spurious Free Dynamic Range 63 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

SADC_53b 65 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

SADC_53c 63 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V

SADC_53d 62 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V

SADC_55a THD (4) Total Harmonic Distortion -63 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

SADC_55b -63 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

SADC_55c -62 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin

AVDD = 5.0V

VREF = VREFA = 3.0V

SADC_55d -62 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF

AVDD = 5.0V

Internal VREF = INTREF = 4.096V

Note:
  1. Characterized with an analog input sine wave = (FTP(max) / 100). Example: FTP(max)=1Msps/100 = 10 kHz sine wave.
  2. Sine wave peak amplitude = 96% ADC Full Scale amplitude input with 12 bit resolution.
  3. Spec values collected under the following additional conditions:
    1. 12 bit resolution mode.
    2. All registers at reset default value unless otherwise mentioned.
  4. Value taken over 7 harmonics.
  5. SAMPCTRL.OFFCOMP = 0,

    SAMPCTRL.SAMPLEN[5:0] = 3.

  6. SAMPCTRL.OFFCOMP = 0 and

    SAMPCTRL.REFCOMP = 0,

    SAMPCTRL.SAMPLEN[5:0] = 3.

Table 46-22. Differential Mode ADC Electrical Specifications
AC CHARACTERISTICS Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

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_13a ENOB (3) Effective Number of bits 10.5 bits 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

DADC_13b 10.5 bits 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

DADC_13c 10.4 bits 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V

DADC_13d 9.9 bits 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V

DADC_19a INL (3) Integral Nonlinearity -2.2 2.2 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

DADC_19b -2 2 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

DADC_19c -2.2 2.2 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V (6)

DADC_19d -6 6 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V

DADC_25a DNL (3) Differential Nonlinearity -0.99 1.2 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

DADC_25b -0.99 1.3 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

DADC_25c -0.99 1.3 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V (6)

DADC_25d -0.99 2.5 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

DADC_31a GERR (3) Gain Error -1.4 5.2 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

DADC_31b -1.05 5.66 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

DADC_31c -23.38 25.29 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V (6)

DADC_31d -237.2 91.56 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

DADC_37a EOFF (3) Offset Error -4.15 4.65 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

DADC_37b -5.81 6.99 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

DADC_37c -5.56 9.48 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V (6)

DADC_37d -4.21 5.71 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

DADC_43a TUE (3) Total Unadjusted Error 1.8 4.6 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V (5)

DADC_43b 1.4 5.4 LSB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V (5)

DADC_43c 1.9 10.9 LSB 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V (6)

DADC_43d 5.4 74.1 LSB 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V (6)

DIFFERENTIAL MODE ADC Dynamic Performance (1,2,3)
DADC_49a SINAD Signal to Noise and Distortion 64 dB 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

DADC_49b 65 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

DADC_49c 64 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V

DADC_49d 61 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V

DADC_51a SNR Signal to Noise ratio 65 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

DADC_51b 65 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

DADC_51c 65 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V

DADC_51d 61 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V

DADC_53a SFDR Spurious Free Dynamic Range 69 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

DADC_53b 71 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

DADC_53c 68 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V

DADC_53d 69 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V

DADC_55a THD (4) Total Harmonic Distortion -70 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 5.0V

DADC_55b -70 1 Msps, REFCTRL.REFSEL = 0x5 = AVDD

VREF = AVDD = 3.3V

DADC_55c -69 1 Msps, REFCTRL.REFSEL = 0x3 = VREFA pin AVDD = 5.0V

VREF = VREFA = 3.0V

DADC_55d -69 1 Msps, REFCTRL.REFSEL = 0x0 = INTREF AVDD = 5.0V

Internal VREF = INTREF = 4.096V

Note:
  1. Characterized with an analog input sine wave = (FTP(max) / 100). Example: FTP(max)=1Msps/100 = 10 kHz sine wave.
  2. Sine wave peak amplitude = 96% ADC_ Full Scale amplitude input with 12bit resolution.
  3. Spec values collected under the following additional conditions:
    1. 12 bit resolution mode.
    2. All registers at reset default value unless otherwise mentioned.
  4. Value taken over 7 harmonics.
  5. SAMPCTRL.OFFCOMP = 1.
  6. SAMPCTRL.OFFCOMP = 1 and SAMPCTRL.REFCOMP = 1.
Table 46-23. ADC Conversion Timing Requirements
AC CHARACTERISTICS Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No. Symbol Characteristics Min. Typ. Max. Units Conditions
ADC_ Clock Requirements
ADC_57 TAD ADC Clock Period 62.5 6250 ns
ADC_58 fGCLK_ADCx ADCx Module GCLK max input freq FCLK_51 MHz
ADC Single-Ended Throughput Rates
ADC_59 FTP (Single-Ended Mode) (3) Throughput Rate

(Single-Ended)

1.231 Msps 12-bit resolution, Rsource ≤298 Ω, SAMPCTRL.SAMPLEN=0 (1)
1.333 10-bit resolution, Rsource ≤633 Ω, SAMPCTRL.SAMPLEN=0 (1)
1.6 8-bit resolution, Rsource ≤1,103 Ω, SAMPCTRL.SAMPLEN=0 (1)
1 Msps 12-bit resolution, Rsource ≤6,335 Ω SAMPCTRL.SAMPLEN=n/a (2)
1.067 10-bit resolution, Rsource ≤7,677 Ω SAMPCTRL.SAMPLEN=n/a (2)
1.231 8-bit resolution, Rsource ≤9,556 Ω SAMPCTRL.SAMPLEN=n/a (2)
ADC Differential Mode Throughput Rates
ADC_61 FTPR (Differential Mode) (3) Throughput Rate

(Differential Mode)

1.231 Msps 12-bit resolution, Rsource ≤298 Ω, SAMPCTRL.SAMPLEN=0 (1)
1.455 10-bit resolution, Rsource ≤633 Ω, SAMPCTRL.SAMPLEN=0 (1)
1.778 8-bit resolution, Rsource ≤1,103 Ω, SAMPCTRL.SAMPLEN=0 (1)
1 Msps 12-bit resolution, Rsource ≤6,335 Ω SAMPCTRL.SAMPLEN=n/a (2)
1.143 10-bit resolution, Rsource ≤7,677 Ω SAMPCTRL.SAMPLEN=n/a (2)
1.333 8-bit resolution, Rsource ≤9,556 Ω SAMPCTRL.SAMPLEN=n/a (2)
Note:
  1. ADC Sample time = ((SAMPCTRL.SAMPLEN + 1) * TAD) and SAMPCTRL.OFFCOMP=0.
  2. ADC HDW forces sample time to 4*TAD when SAMPCTRL.OFFCOMP=1, user SAMPCTRL.SAMPLEN is ignored.
  3. ADC Throughput Rate FTP = ((1 / ((TSAMP + TCNV) * TAD)) / (number of user active analog inputs in use on specific target ADC module)).
Table 46-24. ADC Sample Timing Requirements
AC CHARACTERISTICS Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated)

Operating temperature

-40°C ≤ TA ≤ +85°C for Industrial

Param. No. Symbol Characteristics Min. Typ. Max. Units Conditions
ADC_63 TSAMP (1,2,3) ADC Sample Time 1 TAD 12-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 298 Ω

10-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 633 Ω

8-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 1,103 Ω

2 12-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 2,310 Ω

10-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 2,981 Ω

8-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 3,921 Ω

3 12-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 4,323 Ω

10-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 5,329 Ω

8-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 6,738 Ω

4 12-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 6,335 Ω

10-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 7,678 Ω

8-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 9,556 Ω

5 12-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 8,348 Ω

10-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 10,026 Ω

8-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 12,374 Ω

6 12-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 10,361 Ω

10-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 12,374 Ω

8-bit resolution,

TAD(min), Ext Analog Input Rsource ≤ 15,192 Ω

250 ns With SCALEDVDDCORE or SCALEDAVDD as input
10 µs With INTREF as input
ADC_65 TCNV (3) Conversion Time (Single-Ended Mode) 12 TAD 12-bit resolution
11 10-bit resolution
9 8-bit resolution
ADC_67 Conversion Time (Differential Mode) 12 TAD 12-bit resolution
10 10-bit resolution
8 8-bit resolution
ADC_69 CSAMPLE ADC Internal Sample Cap 3.2 pF -
ADC_71 RSAMPLE ADC Internal impedance 1715 -
Note:
  1. When SAMPCTRL.OFFCOMP = 0:
    • TSAMP = (((RSAMPLE + RSOURCE) * CSAMPLE * 9.7) / TAD)+1 rounded down to nearest whole integer
    • User SAMPCTRL.SAMPLEN = (TSAMP - 1)
  2. When SAMPCTRL.OFFCOMP=1:
    • TSAMP = 4 (Forced by HDW)
    • User SAMPCTRL.SAMPLEN = (n/a, Ignored by HDW)
  3. ADC Throughput Rate FTP = ((1 / ((TSAMP + TCNV) * TAD)) / (number of user active analog inputs in use on specific target ADC module)).