43.21 ADC Electrical Specifications

Table 43-23. ADC AC Electrical Specifications
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp -40°C ≤ T_A ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
Device Supply
ADC_1	V_DDANA	ADC module supply	V_DDANA(min)	—	V_DDANA(max)	V	V_DDIO = V_DDANA
Reference Inputs
ADC_3	V_REF⁽⁴⁾	Reference voltage high (external reference buffers)	—	—	V_DDANA	V	ADC reference voltage
Analog Input Range
ADC_7	A_FS	Full-scale analog input signal range (Single-ended)	0	—	V_DDANA	V	V_REF = V_DDANA(max)

Table 43-24. ADC Single-Ended Mode AC Electrical Specifications
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp -40°C ≤ T_A ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
Single-Ended Mode ADC Accuracy
SADC_11	Res	Resolution	6	—	12	bits	Selectable 8, 10, 12 bit resolution ranges
SADC_13	EN0B⁽³⁾	Effective number of bits	6.08	9.8	10.7	bits	2 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_19	INL⁽³⁾	Integral non linearity	-2.9	-1.18	1.9	LSb	2 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_25	DNL⁽³⁾	Differential non linearity	-1.4	1.29	2.59	LSb	2 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_31	GERR⁽³⁾	Gain error	11.90	18.93	25.00	LSb	2 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_37	E0FF⁽³⁾	Offset error	-8.1	-1.6	1.0	LSb	2 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
Single-Ended Mode ADC Dynamic Performance
SADC_49	SINAD^(1,2,3)	Signal to noise and distortion	38.4	61.1	66.8	dB	V_REF = V_DDANA = V_DDIO = 3.3V at 12-bit resolution, max sampling rate^(1,2)
SADC_51	SNR^(1,2,3)	Signal to noise ratio	38.4	61.8	67.3
SADC_53	SFDR^(1,2,3)	Spurious free dynamic range	61.5	70.3	81.3
SADC_55	THD^(1,2,3)	Total harmonic distortion	-84.0	-70.1	-59.8
Note: Characterized with an analog input sine wave = (FTP(max)/100). Example: FTP(max) = 1 Msps/100 = 10 kHz sine wave. Sine wave peak amplitude = 96% ADC_ Full Scale amplitude input with 12-bit resolution. Spec values collected under the following additional conditions: 12-bit resolution mode All registers at reset default value otherwise not mentioned ADC measurements done with 3.3V V_REF voltage. Value taken over 7 harmonics. Referred to as AVDD in the pinout.

Table 43-25. ADC Conversion AC Electrical Requirements
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp -40°C ≤ T_A ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
ADC_ Clock Requirements
ADC_57	TAD	ADC clock period	—	20.83	—	ns	V_REF = V_DDANA = 3.3V
ADC Single-Ended Throughput Rates
ADC_59	F_TPR (Single-ended mode)	Throughput rate⁽³⁾ (Single-ended)	0.01	—	2	Msps	12-bit resolution, DIV_SHR = 2
Note: Throughput Rate = 1/((SAMC_SHR +15)*TADX) TADX=1/ (ADC Control Clock / DIV_SHR) ,SAMC_SHR = sampling rate

Table 43-26. ADC Sample AC Electrical Requirements
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9V to 3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp -40°C ≤ T_A ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
ADC_63	T_SAMP	ADC sample time ^(1,2,3,4)	1^(1,4)	—	—	TAD	12-bit TAD(min), Ext Analog Input Rsource ≤ 147Ω
							10-bit TAD(min), Ext Analog Input Rsource ≤ 504Ω
							8-bit TAD(min), Ext Analog Input Rsource ≤ 1,000Ω
			2^(1,4)	—	—		12-bit TAD(min), Ext Analog Input Rsource ≤ 2,272Ω
							10-bit TAD(min), Ext Analog Input Rsource ≤ 3,008Ω
							8-bit TAD(min), Ext Analog Input Rsource ≤ 4,000Ω
			3^(1,4)	—	—		12-bit TAD(min), Ext Analog Input Rsource ≤ 4,416Ω
							10-bit TAD(min), Ext Analog Input Rsource ≤ 5,504Ω
							8-bit TAD(min), Ext Analog Input Rsource ≤ 6,976Ω
			4^(1,2,4)	—	—		12-bit TAD(min), Ext Analog Input Rsource ≤ 6,560Ω
							10-bit TAD(min), Ext Analog Input Rsource ≤ 8,000Ω
							8-bit TAD(min), Ext Analog Input Rsource ≤ 9,984Ω
			5^(1,4)	—	—		12-bit TAD(min), Ext Analog Input Rsource ≤ 8,704 Ω
							10-bit TAD(min), Ext Analog Input Rsource ≤ 10,496Ω
							8-bit TAD(min), Ext Analog Input Rsource ≤ 12,992Ω
			6^(1,4,5)	—	—		12-bit TAD(min), Ext Analog Input Rsource ≤ 10,880Ω
							10-bit TAD(min), Ext Analog Input Rsource ≤ 12,992Ω
							8-bit TAD(min), Ext Analog Input Rsource ≤ 16,000Ω
ADC_65	T_CNV	Conversion time ⁽³⁾ (Single-Ended mode)	14			TAD	12-bit resolution
			12				10-bit resolution
			10				8-bit resolution
ADC_69	C_SAMPLE	ADC internal sample cap	4	5	6	pf	—
ADC_71	R_SAMPLE	ADC internal impedance	—	—	200	Ω	—
Note: When SAMPCTRL.OFFCOMP=`0`: TSAMP = (((RSAMPLE + RSOURCE) * CSAMPLE * (#Bits Resolution + 2) * ln(2))/TAD)+1 rounded down to nearest whole integer User SAMPCTRL.SAMPLEN = (TSAMP – 1) When SAMPCTRL.OFFCOMP=`1`: TSAMP = 4 (Forced by HDW) User SAMPCTRL.SAMPLEN = (n/a, Ignored by HDW) ADC Throughput Rate FTP = ((1/((TSAMP + TCNV) * TAD))/(# of user active analog inputs in use on specific target ADC module)) Note: Specification values assume only one AINx channel in use. TSAMP ≥ (INT[((RSAMPLE + RSOURCE) * CSAMPLE * (#Bits Resolution+2) * ln(2))/TAD]+1). For RSOURCE values exceeding TSAMP = 6 sample time condition, use the formula in note 5 to calculate.