57.19 AFEC Electrical Specifications

Table 57-22. AFE Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDDIN 2.5V to 3.6V (unless otherwise stated) Operating temperature: -40°C ≤ T_A ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
Device Supply
AFE_1	VDDIN	AFE Module Supply	VDDIN(min)	—	VDDIN(max)	V	—
Reference Inputs
AFE_3	VREFP⁽¹⁾	AFE Reference Voltage	VDDIN(min) or ≥2.5V whichever is greater	—	VDDIN	V	External Reference VREFN = GNDANA = 0V
AFE_5	IVREFP⁽²⁾	External VREFP input load current	—	0.8	1	mA	@ FCNV (max) w/VREF Input Buffer Disabled or Bypassed RX0&RX1 and AFE12 are ON
Analog Input Range
AFE_7	AFS⁽³⁾	Full-Scale Analog Input Signal Range	2% × VREFP	—	98% × VREFP	V	Single-Ended mode
AFE_7	AFS⁽³⁾	Full-Scale Analog Input Signal Range	-98% × VREFP	—	98% × VREFP	V	Differential mode
AFE_9	VCMIN	Input common mode voltage	GNDANA	—	VDDIN - VREFP/2¹⁰	V	—
Note: The AFE functional device operation with external VREFP < 2.5V is functional, but not characterized. AFE will function, but with degraded accuracy of approximately ~((0.06 * 2n) / VREFP) LSB’s over full scale range, where "n" = #bits. AFE accuracy is limited by internal VREFP accuracy + drift, MCU generated noise plus users application noise/accuracy on VDDIN and/or GNDANA. Allowed noise on VREFP: 120 µVrms in a bandwidth up to 1.74 MHz. Register list: For example, AFEC_ACR.PGA0EN = AFEC_ACR.PGA1EN = 1. When the AFE is in Sleep mode, the VREFP impedance has a minimum of 10 MΩ. Electrical parameters specified inside the operational range. Exceeding this range can introduce additional INL error up to +/- 5 LSB and temperature dependency up to +/-10 LSB.

Table 57-23. AFE Single-Ended Mode Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDDIO = VDDIN 2.5V to 3.6V (unless otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
SINGLE ENDED MODE AFE Accuracy^(4,5) , 1/12 MHz ≤ TAD ≤ 1/20 MHz, IBCTL = 10
SAFE_11	Res	Resolution	10	—	12	bits	Selectable 10 or 12 bit Resolution (no averaging)
SAFE_13	ENOB ^{(1, 2)}	Effective Number of bits	8.5	9.3	—	bits	Gain = 1
			8.3	8.9	—	bits	Gain = 2
			7.5	8.3	—	bits	Gain = 4
SAFE_19	INL	Integral Nonlinearity	-6	+/-1.0	4	LSB	Gain = 1
			-6	+/-1.3	4	LSB	Gain = 2
			-6	+/-1.7	4	LSB	Gain = 4
SAFE_25	DNL	Differential Nonlinearity	-6	+/-0.6	6	LSB	Gain = 1
			-6	+/-0.6	6	LSB	Gain = 2
			-6	+/-0.6	6	LSB	Gain = 4
SAFE_31	GERR	Gain Error	18	30	67	LSB	Gain = 1
			28	44	84	LSB	Gain = 2
			25	40	78	LSB	Gain = 4
SAFE_37	EOFF	Offset Error	-8	5	28	LSB	Gain = 1
			-17	8	47	LSB	Gain = 2
			-35	12	83	LSB	Gain = 4
SAFE_43	TUE	Total Unadjusted Error	-22	19	39	LSB	Gain = 1
			-39	30	63	LSB	Gain = 2
			-52	33	85	LSB	Gain = 4
SINGLE ENDED MODE AFE Dynamic Performance ^(1,2,4,5), 1/12 MHz ≤ TAD ≤ 1/20MHz, IBCTL = 10
SAFE_49	SINAD	Signal to Noise and Distortion	55	58	-	dB	Gain = 1
			53	55	-		Gain = 2
			50	52	-		Gain = 4
SAFE_51	SNR	Signal to Noise ratio	55	58	-	dB	Gain = 1
			54	55	-		Gain = 2
			50	52	-		Gain = 4
SAFE_53	SFDR	Spurious Free Dynamic Range	60	66	-	dB	Gain = 1
			59	62	-		Gain = 2
			56	59	-		Gain = 4
SAFE_55	THD ⁽³⁾	Total Harmonic Distortion	-	-70	-65	dB	Gain = 1
			-	-70	-65		Gain = 2
			-	-70	-58		Gain = 4
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% of VREFP amplitude input with 12bit resolution. Value taken over 7 harmonics. AFE is configured in 12bits mode, All registers are at the reset default value unless otherwise stated. Up to maximum Throughput Rate 0.87MSPs at VREFP = 3.3V and VDDIN = VDDIO = 3.3V and VREFN = GNDANA = 0V.

Table 57-24. AFE Single-Ended Mode Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDDIO = VDDIN 2.5V to 3.6V (unless otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
SINGLE ENDED MODE AFE Accuracy^(4,5) , TAD>1/20 MHz, IBCTL = 11
SAFE_11	Res	Resolution	10	—	12	bits	Selectable 10 or 12 bit Resolution (no averaging)
SAFE_13	ENOB ^{(1, 2)}	Effective Number of bits	8.9	9.6	-	bits	Gain = 1
			8.7	9.3	-	bits	Gain = 2
			8.2	8.8	-	bits	Gain = 4
SAFE_19	INL	Integral Nonlinearity	-9	+/-2.0	9.0	LSB	Gain = 1
			-9.0	+/-2.6	9.0	LSB	Gain = 2
			-9.0	+/-2.7	9.0	LSB	Gain = 4
SAFE_25	DNL	Differential Nonlinearity	-8	+/-2.0	8.0	LSB	Gain = 1
			-8.0	+/-2.0	8.0	LSB	Gain = 2
			-8	+/-2.0	8.0	LSB	Gain = 4
SAFE_31	GERR	Gain Error	-4	2	29	LSB	Gain = 1
			14	23	56	LSB	Gain = 2
			20	33	68	LSB	Gain = 4
SAFE_37	EOFF	Offset Error	-8	4.7	28	LSB	Gain = 1
			-17	7.0	47	LSB	Gain = 2
			-35	9.9	83	LSB	Gain = 4
SAFE_43	TUE	Total Unadjusted Error	-22	19	39	LSB	Gain = 1
			-39	30	63	LSB	Gain = 2
			-52	33	85	LSB	Gain = 4
SINGLE ENDED MODE AFE Dynamic Performance ^(1,2,4,5), TAD>1/20 MHz, IBCTL = 11
SAFE_49	SINAD	Signal to Noise and Distortion	55.1	59.7	-	dB	Gain = 1
			54.1	57.7	-		Gain = 2
			51.4	54.9	-		Gain = 4
SAFE_51	SNR	Signal to Noise ratio	55.6	60.4	-	dB	Gain = 1
			54.5	58.0	-		Gain = 2
			51.6	55.1	-		Gain = 4
SAFE_53	SFDR	Spurious Free Dynamic Range	58.2	66.8	-	dB	Gain = 1
			57.6	62.7	-		Gain = 2
			54.1	60.3	-		Gain = 4
SAFE_55	THD⁽³⁾	Total Harmonic Distortion	-	-69.5	-64.5	dB	Gain = 1
			-	-70.0	-64.1		Gain = 2
			-	-69.3	-62.4		Gain = 4
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% of VREFP amplitude input with 12-bit resolution. Value taken over 7 harmonics. AFE is configured in 12bits mode, All registers are at the reset default value unless otherwise stated. Up to maximum Throughput Rate 1.74 MSPs at VREFP = 3.3V and VDDIN = VDDIO = 3.3V and VREFN = GNDANA = 0V.

Table 57-25. AFE Differential Mode Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDDIO = VDDIN 2.5V to 3.6V (unless otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
DIFFERENTIAL MODE AFE Accuracy^(4,5), 1/12 MHz ≤ TAD ≤ 1/20MHz, IBCTL = 10
DAFE_11	Res	Resolution	8	—	12	bits	Selectable 10 or 12 bit Resolution (no averaging)
DAFE_13	ENOB^{(1, 2)}	Effective Number of bits	9.2	10.0	-	bits	Gain = 1
			9.2	10.0	-	bits	Gain = 2
			9.1	9.9	-	bits	Gain = 4
DAFE_19	INL	Integral Nonlinearity	-4	+/-0.7	4	LSB	Gain = 1
			-4	+/-1.0	4.0	LSB	Gain = 2
			-4	+/-1.2	4.0	LSB	Gain = 4
DAFE_25	DNL	Differential Nonlinearity	-2	+/-0.6	2.0	LSB	Gain = 1
			-2	+/-0.6	2.0	LSB	Gain = 2
			-2	+/-0.6	2.0	LSB	Gain = 4
DAFE_31	GERR	Gain Error	-4	2	29	LSB	Gain = 1
			14	23	56	LSB	Gain = 2
			20	33	68	LSB	Gain = 4
DAFE_37	EOFF	Offset Error	-4	3	11	LSB	Gain = 1
			-8	4	18	LSB	Gain = 2
			-15	5	31	LSB	Gain = 4
DAFE_43	TUE	Total Unadjusted Error	-13	5	20	LSB	Gain = 1
			-26	16	38	LSB	Gain = 2
			-35	24	53	LSB	Gain = 4
DIFFERENTIAL MODE AFE Dynamic Performance ^(1,2,4,5), 1/12 MHz ≤ TAD ≤ 1/20MHz, IBCTL = 10
DAFE_49	SINAD	Signal to Noise and Distortion	58.9	61.7	-	dB	Gain = 1
			58.7	61.9	-		Gain = 2
			58.2	61.2	-		Gain = 4
DAFE_51	SNR	Signal-to- Noise ratio	59.4	62.5	-	dB	Gain = 1
			59.1	62.6	-		Gain = 2
			58.5	61.9	-		Gain = 4
DAFE_53	SFDR	Spurious Free Dynamic Range	66.2	71.0	-	dB	Gain = 1
			66.4	72.4	-		Gain = 2
			65.4	72.0	-		Gain = 4
DAFE_55	THD ⁽³⁾	Total Harmonic Distortion	-	-69.8	-65.1	dB	Gain = 1
			-	-70.7	-65.3		Gain = 2
			-	-70.5	-65.0		Gain = 4
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% of VREFP amplitude input with 12-bit resolution. Value taken over 7 harmonics. AFE is configured in 12 bits mode, All registers are at the reset default value unless otherwise stated. Up to maximum Throughput Rate 0.87 Msps at VREFP = 3.3V and VDDIN = VDDIO = 3.3V and VREFN = GNDANA = 0V.

Table 57-26. AFE Differential Mode Electrical Specifications
AC CHARACTERISTICS			Standard Operating Conditions: VDDIO = VDDIN 2.5V to 3.6V (unless otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
DIFFERENTIAL MODE AFE Accuracy^(4,5), TAD>1/20 MHz, IBCTL = 11
DAFE_11	Res	Resolution	8	—	12	bits	Selectable 10 or 12 bit Resolution (no averaging)
DAFE_13	ENOB ^{(1, 2)}	Effective Number of bits	9.4	10.2	-	bits	Gain = 1
			9.6	10.2	-	bits	Gain = 2
			9.5	10.1	-	bits	Gain = 4
DAFE_19	INL	Integral Nonlinearity	-6	+/-2.0	6.0	LSB	Gain = 1
			-6	+/-2.1	6.0	LSB	Gain = 2
			-6	+/-2.5	6.0	LSB	Gain = 4
DAFE_25	DNL	Differential Nonlinearity	-5	+/-2.0	5	LSB	Gain = 1
			-5	+/-2.0	5	LSB	Gain = 2
			-5	+/-2.0	5	LSB	Gain = 4
DAFE_31	GERR	Gain Error	-4	2	29	LSB	Gain = 1
			14	23	56	LSB	Gain = 2
			20	33	68	LSB	Gain = 4
DAFE_37	EOFF	Offset Error	-4	3.0	11	LSB	Gain = 1
			-8	4.0	18	LSB	Gain = 2
			-15	5	31	LSB	Gain = 4
DAFE_43	TUE	Total Unadjusted Error	-13	5	20	LSB	Gain = 1
			-26	16	38	LSB	Gain = 2
			-35	24	53	LSB	Gain = 4
DIFFERENTIAL MODE AFE Dynamic Performance ^(1,2,4,5), TAD>1/20 MHz, IBCTL = 11
DAFE_49	SINAD	Signal to Noise and Distortion	58.6	63.1	-	dB	Gain = 1
			59.4	63.1	-		Gain = 2
			59.0	62.4	-		Gain = 4
DAFE_51	SNR	Signal to Noise ratio	59.7	64.4	-	dB	Gain = 1
			60.6	64.3	-		Gain = 2
			60.4	63.5	-		Gain = 4
DAFE_53	SFDR	Spurious Free Dynamic Range	66.3	71.1	-	dB	Gain = 1
			66.7	72.4	-		Gain = 2
			65.6	71.7	-		Gain = 4
DAFE_55	THD ⁽³⁾	Total Harmonic Distortion	-	-69.7	-65.2	dB	Gain = 1
			-	-70.4	-65.0		Gain = 2
			-	-70.1	-64.3		Gain = 4
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% of VREFP amplitude input with 12-bit resolution. Value taken over 7 harmonics. AFE is configured in 12 bits mode, All registers are at the reset default value unless otherwise stated. Up to maximum Throughput Rate 1.74 Msps at VREFP = 3.3V and VDDIN = VDDIO = 3.3V and VREFN = GNDANA = 0V.

Table 57-27. AFE Conversion and Sample Electrical Requirements
AC CHARACTERISTICS			Standard Operating Conditions: VDDIO = VDDIN 2.5V to 3.6V (unless otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typ.	Max.	Units	Conditions
AFE Clock Requirements
AFE_57	TAD	AFE Clock Period	25	—	83	ns
AFE Single-Ended Throughput Rates
AFE_59	FTP ⁽¹⁾ (Single-Ended Mode)	Throughput Rate (Single-Ended)	—	—	1.74	MSPS	Not changing channel 12-bit resolution, Gain = 1 Rsource ≤ 21.5 kΩ,
			—	—	1.74		Not changing channel 12-bit resolution, Gain = 2 Rsource ≤ 9.7kΩ,
			—	—	1.74		Not changing channel 12-bit resolution, Gain = 4 Rsource ≤ 3.8 kΩ,
AFE Differential Mode Throughput Rates
AFE_61	FTP⁽¹⁾ (Differential Mode)	Throughput Rate (Differential Mode)	—	—	1.74	MSPS	Not changing channel 12-bit resolution, Gain = 1 Rsource ≤ 21.5 kΩ,
			—	—	1.74		Not changing channel 12-bit resolution, Gain = 2 Rsource ≤ 9.7 kΩ,
			—	—	1.74		Not changing channel 12-bit resolution, Gain = 4 Rsource ≤ 3.8kΩ,
AFE Conversion and Sample time
AFE_65	TCNV	Conversion Time (Single-Ended Mode)	23 x TAD			units	12-bit resolution
		Conversion Time (Single-Ended Mode)	23 x TAD			units	10-bit resolution
		Conversion Time (Differential Mode)	23 x TAD			TAD	12-bit resolution
		Conversion Time (Differential Mode)	23 x TAD			TAD	10-bit resolution
AFE_66	Tstartup	Sleep mode to Normal mode	—	—	4	µs
AFE_66	Tstartup	Fast Wake-up mode to Normal mode	—	—	2	µs
Note: Specification value assume only one AINx channel in use: AFE Throughput Rate FTP = (1 / (TCNV * TAD)) / (# of user active analog inputs in use on specific target AFE module).

PIC32CZ CA70/MC70

57.19 AFEC Electrical Specifications