4.9 ADC Electrical Specifications

Table 4-9. ADC AC Electrical Specifications
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9-3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
Device Supply
ADC_1	V_DDANA	ADC supply	V_DDANA(min)	—	V_DDANA(max)	V	V_DDIO = V_DDANA
Reference Input
ADC_3	V_REF⁽⁶⁾	ADC reference voltage⁽⁴⁾	—	—	V_DDANA	V	V_REF = V_DDANA
Analog Input Range
ADC_7	AFS	Full-scale analog input signal range (Single-ended)	0	—	V_DDANA	V	V_REF = V_DDANA

Table 4-10. ADC Single-Ended Mode AC Electrical Specifications
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9-3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
Single-Ended Mode ADC Accuracy
SADC_11	Res	Resolution	—	—	—	bits	The RNBD451 module operates with 12-bit resolution
SADC_13	EN0B⁽³⁾	Effective number of bits	—	9.3	—	bits	1.6 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_19	INL⁽³⁾	Integral non-linearity	—	-5.2	—	LSb	1.6 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_19	INL⁽³⁾	Integral non-linearity	—	2.7	—	LSb	1.6 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_25	DNL⁽³⁾	Differential non-linearity	—	-1	—	LSb	1.6 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_25	DNL⁽³⁾	Differential non-linearity	—	1.8	—	LSb	1.6 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_31	GERR⁽³⁾	Gain error	—	-0.7	—	LSb	1.6 Msps, Internal V_REF, V_DDANA = V_DDIO = 3.3V
SADC_37	E0FF⁽³⁾	Offset error	—	3.2	—	LSb	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	—	57.8	—	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	—	58.2	—
SADC_53	SFDR^(1,2,3)	Spurious free dynamic range	—	66.2	—
SADC_55	THD^(1,2,3,5)	Total harmonic distortion	—	-71.3	—

Note:

Characterized with an analog input sine wave = (FTP(maximum)/100). Example: FTP(maxium) = 1 Msps/100 = 10 KHz sine wave.
Sinewave peak amplitude = 96% ADC_ Full Scale amplitude input with 12-bit resolution
Spec values collected under the following additional conditions:
1. 12-bit resolution mode
2. All registers at the reset default value not otherwise mentioned
ADC Measurements done with 3.3V V_REF Voltage
Value taken over 7 harmonics

Table 4-11. ADC Conversion AC Electrical Requirements
AC Characteristics			Standard Operating Conditions: V_DDIO = V_DDANA 1.9-3.6V (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +85°C for Industrial Temp
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
ADC_ Clock Requirements
ADC_57	TAD	ADC clock period	—	20.8	—	ns	V_REF = V_DDANA = 3.3V
ADC Single-Ended Throughput Rates
ADC_59	FTPR (Single-ended Mode)	Throughput rate⁽²⁾ (Single-ended)	—	2	—	Msps	12-bit resolution, DIV_SHR = 2
ADC_59	FTPR (Single-ended Mode)	Throughput rate⁽²⁾ (Single-ended)	—	0.7	—	Msps	12-bit resolution, DIV_SHR = 4

Note:

Conversion_time = (SAMC_SHR+15)*TAD
FTPR = 1/(( SAMC_SHR + Resolution + 1 ) * ( 1/( ControlClk/DIV_SHR )))

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