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
Ta = 22ºC
Min
Typ
Max
1.197
40
Unit
V
VREF output voltage, VREF(22)
VREF chop step
1.193
1.195
mV
VREF power supply sensitivity
V3P3A = 3.0 to 3.6 V
-1.5
100
1.5
mV/V
ΔVREF / ΔV3P3A
VREF_DIS = 1,
VREF = 1.3 to 1.7 V
VREF input impedance
kΩ
CAL =1,
VREF output impedance
VNOM definition2
2.5
kΩ
ILOAD = 10 µA, -10 µA
VNOM (T) =VREF(22) + (T − 22)TC1+ (T − 22)2 TC2
V
VNOM temperature coefficients:
TC1
TC2
3.18·(52.46-TRIMT)
µV/ºC
µV/°C2
-0.444
VREF(T) deviation from VNOM(T)
106
-401
+401
PPM/ºC
VREF(T) −VNOM (T)
VNOM (T)
max(T − 22 ,40)
PPM/
year
VREF aging
±25
1 Guaranteed by design; not production tested.
2 This relationship describes the nominal behavior of VREF at different temperatures.
20
Rev. 1.4
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
