Datasheet

MAX71020
Single-Chip Electricity Meter AFE
3Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
PARAMETER CONDITIONS MIN TYP MAX UNITS
TEMPERATURE MONITOR
TNOM (Nominal Value at 22°C) V
V3P3A
= 3.3V 956 LSB
Temperature Measurement
Equation
Temp = 0.33 x STEMP +
21.77
°C
Temperature Error (Note 4)
T
A
= -40°C to +85°C -6 +6
°C
T
A
= -20°C to +60°C -4.8 +4.8
Duration of Temperature
Measurement After Setting
TEMP_START
TEMP_PER = 0 15 60 ms
SUPPLY CURRENT PERFORMANCE SPECIFICATIONS
V
3P3A
+ V
3P3SYS
Current
(Note 4)
V
V3P3A
= V
V3P3SYS
= 3.3V, CE_E = 1,
ADC_E = 1
3 4.3 mA
INTERNAL POWER-FAULT COMPARATOR SPECIFICATIONS
Overall Response Time
100mV overdrive, falling 20 200
Fs
100mV overdrive, rising 8 200
Falling Threshold
3.0V comparator 2.83 2.93 3.03 V
2.8V comparator 2.75 2.81 2.89 V
Difference 3.0V and 2.8V comparators 50 136 220 mV
Hysteresis (Rising Threshold -
Falling Threshold)
3.0V comparator, T
A
= +22°C 17 45 74
mV
2.8V comparator, T
A
= +22°C 15 42 70
PLL PERFORMANCE SPECIFICATIONS
PLL Power-Up Settling Time
V
V3P3A
= 0 to 3.3V step, measured from first edge
of MCK
75
Fs
PLL_FAST Settling Time
V
V3P3A
= 3.3V, PLL_FAST rise 10
Fs
V
V3P3A
= 3.3V, PLL_FAST fall 10
PLL Lock Frequency at XOUT V
V3P3A
= 3.3V, MCK frequency error < 1% 7 9.8 13 MHz
VREF PERFORMANCE SPECIFICATIONS
VREF Output Voltage, VREF (22) T
A
= +22°C 1.200 1.205 1.210 V
VREF Power-Supply Sensitivity
(DV
REF
/DV
V3P3A
)
V
V3P3A
= 3.0V to 3.6V -1.5 +1.5 mV/V
VNOM Definition
VNOM(T) = VREF(22) +
TC1(T - 22) + TC2(T - 22)
2
V
VNOM Temperature Coefficient
TC1
29.32 - 1.05 x TRIMT
FV/°C
VNOM Temperature Coefficient
TC2
-0.56 - 0.004 x TRIMT
FV/°C
2
VREF(T) Deviation from
VNOM(T):
-
6
VREF(T) VNOM(T)10
VNOM(T) 62
(Note 4) -40 +40 ppm/°C