71M6541D Datasheet, PDF (139/166 Pages) Maxim Integrated Products – 0.1% Accuracy Over 2000:1 Current Range Energy Meter ICs

71M6541D/F/G and 71M6542F/G Data Sheet
Solder temperature – 10 second duration
ESD stress on all pins
6.2 Recommended External Components
+250 °C
±4 kV
Table 94: Recommended External Components
Name
C1
C2
CSYS
CVDD
CVLCD
From
V3P3A
V3P3D
V3P3SYS
VDD
VLCD
XTAL
XIN
CXS
CXL
XIN
XOUT
To
GNDA
GNDD
GNDD
GNDD
GNDD
XOUT
GNDA
GNDA
Function
Value
Unit
Bypass capacitor for 3.3 V supply
≥0.1 ±20% µF
Bypass capacitor for 3.3 V output
0.1 ±20% µF
Bypass capacitor for V3P3SYS
≥1.0 ±30% µF
Bypass capacitor for VDD
0.1 ±20% µF
Bypass capacitor for VLCD pin (when
charge pump is used)
≥0.1 ±20% µF
32.768 kHz crystal – electrically similar to
ECS .327-12.5-17X, Vishay XT26T or
Suntsu SCP6–32.768kHz TR (load
32.768
kHz
capacitance 12.5 pF).
Load capacitor values for crystal depend on
crystal specifications and board parasitics.
15 ±10%
pF
Nominal values are based on 4 pF board
capacitance and include an allowance for _{10 ±10%}
pF
chip capacitance.
6.3 Recommended Operating Conditions
Unless otherwise specified, all parameters listed in 6.4 Performance Specifications and 6.5 Timing
Specifications are valid over the Recommended Operating Conditions provided in Table 95 below.
Table 95: Recommended Operating Conditions
Parameter
Condition
Min Typ Max Unit
V3P3SYS and V3P3A Supply Voltage for
precision metering operation (MSN mode).
Voltages at VBAT and VBAT_RTC need
not be present.
VBAT=0 V to 3.8 V
VBAT_RTC =0 V to
3.8 V
3.0
3.6
V
VBAT Voltage (BRN mode). V3P3SYS is V3P3SYS < 2.8 V
below the 2.8 V comparator threshold.
Either V3P3SYS or VBAT_RTC must be
and
Max (VBAT_RTC,
2.5
high enough to power the RTC module. V3P3SYS) > 2.0 V
3.8
V
VBAT_RTC Voltage. VBAT_RTC is not
needed to support the RTC and non-
V3P3SYS<2.0 V
2.0
volatile memory unless V3P3SYS < 2.0 V
Operating Temperature
-40
3.8
V
+85
ºC
Notes:
1. GNDA and GNDD must be connected together.
2. V3P3SYS and V3P3A must be connected together.