System Monitor Specifications

Table 1. System Monitor Specifications
Parameter	Symbol	Comments/Conditions	Min	Typ	Max	Units
V_CCADC = 1.8V ±3%, V_REFP = 1.25V, V_REFN = 0V, ADCCLK = 5.2 MHz, T_j = –40°C to 100°C, typical values at T_j = 40°C
ADC Accuracy¹
Resolution			10	–	–	Bits
Integral nonlinearity²	INL		–	–	±1.5	LSBs
Differential nonlinearity	DNL	No missing codes, guaranteed monotonic	–	–	±1	LSBs
Offset error		Offset calibration enabled	–	–	±2	LSBs
Gain error			–	–	±0.4	%
Sample rate			–	–	0.2	MS/s
RMS code noise		External 1.25V reference	–	–	1	LSBs
RMS code noise		On-chip reference	–	1	–	LSBs
ADC Accuracy at Extended Temperatures
Resolution		T_j = –55°C to 125°C	10	–	–	Bits
Integral nonlinearity²	INL	T_j = –55°C to 125°C	–	–	±1.5	LSBs
Differential nonlinearity	DNL	No missing codes, guaranteed monotonic T_j = –55°C to 125°C	–	–	±1	LSBs
Analog Inputs²
ADC input ranges		Unipolar operation	0	–	1	V
		Bipolar operation	–0.5	–	+0.5	V
		Unipolar common mode range (FS input)	0	–	+0.5	V
		Bipolar common mode range (FS input)	+0.5	–	+0.6	V
Maximum external channel input ranges		Adjacent channels set within these ranges should not corrupt measurements on adjacent channels	–0.1	–	V_CCADC	V
On-Chip Sensor Accuracy
Temperature sensor error^{1, 3}		T_j = –55°C to 125°C (with external REF)	–	–	±3	°C
		T_j = –55°C to 110°C (with internal REF)	–	–	±3.5	°C
		T_j = 110°C to 125°C (with internal REF)	–	–	±5	°C
Supply sensor error⁴		Supply voltages 0.72V to 1.2V, T_j = –40°C to 100°C (with external REF)	–	–	±0.5	%
		Supply voltages 0.72V to 1.2V, T_j = –55°C to 125°C (with external REF)	–	–	±1.0	%
		All other supply voltages, T_j = –40°C to 100°C (with external REF)	–	–	±1.0	%
		All other supply voltages, T_j = –55°C to 125°C (with external REF)	–	–	±2.0	%
		Supply voltages 0.72V to 1.2V, T_j = –40°C to 100°C (with internal REF)	–	–	±1.0	%
		Supply voltages 0.72V to 1.2V, T_j = –55°C to 125°C (with internal REF)	–	–	±2.0	%
		All other supply voltages, T_j = –40°C to 100°C (with internal REF)	–	–	±1.5	%
		All other supply voltages, T_j = –55°C to 125°C (with internal REF)	–	–	±2.5	%
Conversion Rate⁵
Conversion time—continuous	t_CONV	Number of ADCCLK cycles	26	–	32	Cycles
Conversion time—event	t_CONV	Number of ADCCLK cycles	–	–	21	Cycles
DRP clock frequency	DCLK	DRP clock frequency	8	–	250	MHz
ADC clock frequency	ADCCLK	Derived from DCLK	1	–	5.2	MHz
DCLK duty cycle			40	–	60	%
SYSMON Reference⁶
External reference	V_REFP	Externally supplied reference voltage	1.20	1.25	1.30	V
On-chip reference		Ground V_REFP pin to AGND, T_j = –40°C to 100°C	1.2375	1.25	1.2625	V
On-chip reference		Ground V_REFP pin to AGND, T_j = –55°C to 125°C	1.225	1.25	1.275	V
ADC offset errors are removed by enabling the ADC automatic offset calibration feature. The values are specified for when this feature is enabled. See the Analog Input section in the UltraScale Architecture System Monitor User Guide (UG580). When reading temperature values directly from the PMBus interface, the SYSMON has a +4°C offset due to the transfer function used by the PMBus application. For example, the external REF temperature sensor error’s range of ±3°C becomes +1°C to +7°C when the temperature is read through the PMBus interface. Supply sensor offset and gain errors are removed by enabling the automatic offset and gain calibration feature. The values are specified for when this feature is enabled. See the Adjusting the Acquisition Settling Time section in the UltraScale Architecture System Monitor User Guide (UG580). Any variation in the reference voltage from the nominal V_REFP = 1.25V and V_REFN = 0V will result in a deviation from the ideal transfer function. This also impacts the accuracy of the internal sensor measurements (i.e., temperature and power supply). However, for external ratiometric type applications allowing reference to vary by ±4% is permitted.