71M6543F Datasheet, PDF (134/157 Pages) Maxim Integrated Products – Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation

71M6543F/H and 71M6543G/GH Data Sheet
6.2 Recommended External Components
Table 89: Recommended External Components
Name
C1
C2
CSYS
CVDD
CVLCD
From
V3P3A
V3P3D
V3P3SYS
VDD
VLCD
XTAL
XIN
CXS
XIN
CXL
XOUT
To
GNDA
GNDD
GNDD
GNDD
GNDD
XOUT
GNDA
GNDA
Function
Bypass capacitor for 3.3 V supply
Bypass capacitor for 3.3 V output
Bypass capacitor for V3P3SYS
Bypass capacitor for VDD
Bypass capacitor for VLCD pin
32.768 kHz crystal – electrically
equivalent to ECS .327-12.5-17X or
Vishay XT26T, load capacitance 12.5 pF
Load capacitor values for crystal depend
on crystal specifications and board
parasitics. Nominal values are based on
4 pF board capacitance and include an
allowance for chip capacitance.
Value
Unit
≥0.1 ±20% µF
0.1 ±20% µF
≥1.0 ±30% µF
0.1 ±20% µF
≥0.1 ±20% µF
32.768
kHz
15 ±10%
pF
10 ±10%
pF
6.3 Recommended Operating Conditions
Unless otherwise specified, all parameters listed under 6.4 Performance Specifications and 6.5 Timing
Specifications are valid over the Recommended Operating Conditions provided in Table 90 below.
Table 90: Recommended Operating Conditions
Parameter
Condition
Min Typ Max Unit
V3P3SYS and V3P3A Supply Voltage for precision VBAT=0 V to 3.8 V
metering operation (MSN mode). Voltages at
VBAT_RTC =0 V to 3.0
VBAT and VBAT_RTC need not be present.
3.8 V
3.6 V
VBAT Voltage (BRN mode). V3P3SYS is below V3P3SYS < 2.8 V
the 2.8 V comparator threshold. Either V3P3SYS and
or VBAT_RTC must be high enough to power the Max(VBAT_RTC,
2.5
RTC module.
V3P3SYS) > 2.0 V
3.8 V
VBAT_RTC Voltage. VBAT_RTC is not needed to
support the RTC and non-volatile memory unless V3P3SYS<2.0 V
2.0
V3P3SYS<2.0 V
3.8 V
Operating Temperature
-40
+85 ºC
Notes:
1. GNDA and GNDD must be connected together.
2. V3P3SYS and V3P3A must be connected together.
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