50.12 ADC Electrical Specifications

Table 50-13. ADC Single-Ended Mode Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDD = AVDD = 1.62V to 3.63V (unless otherwise stated) Operating temperature: -40°C ≤ T_A ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
SINGLE-ENDED MODE ADC Accuracy ⁽³⁾
SADC_19	INL	Integral Nonlinearity	-7.5	—	7.6	LSB	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.SAMPLEN = 3
SADC_21	INL	Integral Nonlinearity	-8.7	—	9.1	LSB	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL= 0x3 or 0x4) SAMPCTRL.SAMPLEN = 3
SADC_31	GERR	Gain Error	-28	—	18	%	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.SAMPLEN = 3
SADC_33	GERR	Gain Error	-43	—	25	%	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL= 0x3 or 0x4) SAMPCTRL.SAMPLEN = 3
SADC_37	EOFF	Offset Error	-56	—	57	mV	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.SAMPLEN = 3
SADC_39	EOFF	Offset Error	-53	—	79	mV	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL= 0x3 or 0x4) SAMPCTRL.SAMPLEN = 3
SADC_43	TUE	Total Unadjusted Error	2.9	—	28	LSB	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.SAMPLEN = 3
SADC_45	TUE	Total Unadjusted Error	3.7	—	48	LSB	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL= 0x3 or 0x4) SAMPCTRL.SAMPLEN = 3
Single-Ended Mode ADC Dynamic Performance ^(1,2,3)
SADC_53	SFDR	Spurious Free Dynamic Range	57.5	—	—	dB	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.SAMPLEN = 3
SADC_54	SFDR	Spurious Free Dynamic Range	57.32	—	—		AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL= 0x3 or 0x4) SAMPCTRL.SAMPLEN = 3
SADC_55	THD ⁽⁴⁾	Total Harmonic Distortion	—	—	-56.1		AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.SAMPLEN = 3
SADC_56	THD ⁽⁴⁾	Total Harmonic Distortion	—	—	-55.6		AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL= 0x3 or 0x4) SAMPCTRL.SAMPLEN = 3
Note: Characterized with an analog input sine wave = (F_TP(max) / 100). Example: F_TP(max) = 1 Msps/100 = 10 kHz sine wave. Sine wave peak amplitude = 96% ADC Full Scale amplitude input with 12-bit resolution. Specific values collected under the following additional conditions: All registers at reset default value unless otherwise stated. 12-bit resolution mode. Value taken over 7 harmonics.

Table 50-14. ADC Differential Mode Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDD = AVDD = 1.62V to 3.63V (unless otherwise stated) Operating temperature: -40°C ≤ T_A ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
Differential Mode ADC Accuracy ⁽³⁾
DADC_31	GERR	Gain Error	-26	—	11	%	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 0
DADC_33	GERR	Gain Error	-18	—	26	%	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL = 0x3 or 0x4) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 1
DADC_37	EOFF	Offset Error	-6.6	—	3.1	mV	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 0
DADC_39	EOFF	Offset Error	-5.7	—	3.8	mV	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL = 0x3 or 0x4) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 1
DADC_43	TUE	Total Unadjusted Error	2.3	—	8.1	LSB	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 0
DADC_45	TUE	Total Unadjusted Error	2.6	—	11	LSB	AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL = 0x3 or 0x4) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 1
Differential Mode ADC Dynamic Performance ^(1,2,3)
DADC_51	SNR	Signal-to-Noise ratio	62.4	—	—	dB	AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 0
DADC_52	SNR	Signal-to-Noise ratio	61.2	—	—		AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL = 0x3 or 0x4) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 1
DADC_55	THD ⁽⁴⁾	Total Harmonic Distortion	—	—	-61.4		AVDD = 3.3V VREF = AVDD (REFCTRL.REFSEL = 0x5) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 0
DADC_56	THD ⁽⁴⁾	Total Harmonic Distortion	—	—	-63.3		AVDD = 3.3V VREF = VREFA/B = 2.7V (REFCTRL.REFSEL = 0x3 or 0x4) SAMPCTRL.OFFCOMP = 1 SAMPCTRL.REFCOMP = 1
Note: Characterized with an analog input sine wave = (F_TP(max) / 100). Example: F_TP(max) = 1 Msps/100 = 10 kHz sine wave. Sine wave peak amplitude = 96% ADC Full Scale amplitude input with 12-bit resolution. Specific values collected under the following additional conditions: All registers at reset default value unless otherwise stated 12-bit resolution mode Value taken over 7 harmonics.