71M6533G Maxim, 71M6533G Datasheet - Page 114

• Manufacturer Part Number: 71M6533G
• Description: The Teridian™ 71M6533 and 71M6534 are third-generation polyphase metering systems-on-chips (SoCs) with a 10MHz 8051-compatible MPU core, low-power RTC, flash, and LCD driver
• Manufacturer: Maxim

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