78M6618 Datasheet, PDF (20/32 Pages) Maxim Integrated Products – 128KB Flash with Security Packaged in a Lead(Pb)-Free/RoHS-Compliant

78M6618 Data Sheet
DS_6618_005
2.4.14 VREF
Table 18 shows the performance specifications for VREF. Unless otherwise specified, VREF_DIS = 0.
Table 18: VREF Performance Specifications
Parameter
Condition
Min Typ Max
VREF output voltage, VREF(22)
Ta = 22ºC
1.193 1.195 1.197
VREF chop step
40
VREF power supply sensitivity
ΔVREF / ΔV3P3A
V3P3A = 3.0 to 3.6 V
-1.5
1.5
VREF input impedance
VREF_DIS = 1,
VREF = 1.3 to 1.7 V
100
VREF output impedance
VNOM definition²
CAL =1,
2.5
ILOAD = 10 µA, -10 µA
VNOM (T ) = VREF (22) + (T − 22)TC1+ (T − 22)² TC2
VNOM temperature coefficients:
TC1
TC2
3.18·(52.46-TRIMT)
-0.444
VREF(T) deviation from VNOM(T)
VREF(T ) − VNOM (T )
10 ⁶
VNOM (T )
max(T − 22 ,40)
-40¹
+40¹
VREF aging
±25
1 _{Guaranteed by design; not production tested.}
2 _{This relationship describes the nominal behavior of VREF at different temperatures.}
Unit
V
mV
mV/V
kΩ
kΩ
V
µV/ºC
µV/°C²
PPM/ºC
PPM/
year
20
Rev. 1.4