71M6533 Datasheet, PDF (114/132 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6533/G/H and 71M6534/H Data Sheet
FDS_6533_6534_004
6.4.15 VREF and VBIAS
Table 84 shows the performance specifications for VREF and VBIAS. Unless otherwise specified,
VREF_DIS = 0.
Table 84: VREF Performance Specifications
Parameter
VREF output voltage, VREF(22)
VREF chop step
VREF power supply sensitivity
ΔVREF / ΔV3P3A
VREF input impedance
VREF output impedance
VNOM definition ³
Condition
Ta = 22ºC
Min
1.193
Typ
1.195
Max
1.197
40
V3P3A = 3.0 to 3.6 V
-1.5
1.5
VREF_DIS = 1,
VREF = 1.3 to 1.7 V
100
CAL =1,
ILOAD = 10 µA, -10 µA
2.5
VNOM (T ) = VREF(22) + (T − 22)TC1⋅10^−6 + (T − 22)²TC2 ⋅10^−6
Unit
V
mV
mV/V
kΩ
kΩ
V
Definitions ⁴
If TRIMBGA and TRIMBGB are available (71M6533G/H, 71M6534H)
γ = 0.1·TRIMBGB - 0.143·(TRIMM+0.5),
VNOM temperature coefficients ³
TC1
TC2
VREF(T) deviation from
VNOM(T)
VREF(T ) − VNOM (T )
10 ⁶
VNOM (T )
max(T − 22 ,40)
ξ = ^{TEMP22 − 500 ⋅ TRIMBGA − 370000}
900
,
η = (56.2 – TRIMT)·0.55
η+ 19γ - 0.065γξ +0.34ξ + 8.0
0.015γ - 0.0013ξ – 0.35
µV/ºC
µV/ºC ²
-15 ¹
+15 ¹ PPM/ºC
If TRIMBGA and TRIMBGB are not available (71M6533, 71M6534)
VNOM temperature coefficients:
TC1
TC2
3.18·(52.46-TRIMT)
-0.444
VREF(T) deviation from VNOM(T)
VREF(T ) − VNOM (T )
10 ⁶
-40 ¹
VNOM (T )
max(T − 22 ,40)
+40 ¹
µV/ºC
µV/°C ²
PPM/ºC
VREF aging
VBIAS Voltage
Ta = 25 °C
Ta = -40 °C to 85 °C
(-1%)
(-4%)
±25
PPM/
year
1.6 (+1%)
V
1.6 (+4%)
V
1 _{Guaranteed by design; not production tested.}
2 _{This specification will be guaranteed and verified in production samples, but will be measured in}
production only at DC.
3 _{This relationship describes the nominal behavior of VREF at different temperatures.}
4 _{TEMP22 is the value read from the temperature sensor at 22°C.}
114
Rev 2