ade7166 Analog Devices, Inc., ade7166 Datasheet - Page 73

• Manufacturer Part Number: ade7166
• Description: Single-phase Energy Measurement Ic With 8052 Mcu, Rtc, And Lcd Driver
• Manufacturer: Analog Devices, Inc.

TEMPERATURE, BATTERY, AND SUPPLY VOLTAGE MEASUREMENTS
The ADE7566/ADE7569/ADE7166/ADE7169 include
temperature measurements as well as battery and supply voltage
measurements. These measurements enable many forms of
compensation. The temperature and supply voltage measurements
can be used to compensate external circuitry. The RTC can be
calibrated over temperature to ensure that it does not drift. Supply
voltage measurements allow the LCD contrast to be maintained
despite variations in voltage. Battery measurements allow low
battery detection to be performed.
Table 47. Temperature, Battery, and Supply Voltage Measurement SFRs
SFR Address
0xF9
0xF3
0xD8
0xFA
0xEF
0xDF
0xD7
Table 48. Peripheral ADC Strobe Period SFR (STRBPER, 0xF9)
Bit
7 to 6
5 to 4
3 to 2
1 to 0
1
The strobing option only works when the RTCEN bit in RTC Configuration SFR (TIMECON, 0xA1) is set.
Mnemonic
Reserved
VDCIN_PERIOD[1:0]
BATT_PERIOD[1:0]
TEMP_PERIOD[1:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Name
STRBPER
DIFFPROG
ADCGO
BATVTH
VDCINADC
BATADC
TEMPADC
Default
00
0
0
0
Description
Peripheral ADC Strobe Period (see Table 48).
Temperature and Supply Delta Configuration (see Table 49).
Start ADC Measurement (see Table 50).
Battery Detection Threshold (see Table 51).
V
Battery ADC Value (see Table 53).
Temperature ADC Value (see Table 54).
Description
These bits should be left clear for proper operation.
Period for background external voltage measurements.
VDCIN_PERIOD[1:0]
00
01
10
11
Period for background battery level measurements.
BATT_PERIOD[1:0]
00
01
10
11
Period for background temperature measurements.
TEMP_PERIOD[1:0]
00
01
10
11
DCIN
ADC Value (see Table 52).
Rev. A | Page 73 of 144
1
All ADC measurements are configured through the SFRs
detailed in Table 47.
The temperature, battery, and supply voltage measurements can
be configured to continue functioning in PSM1 and PSM2.
Keeping the temperature measurement active ensures that it is
not necessary to wait for the temperature measurement to settle
before using it for compensation.
ADE7566/ADE7569/ADE7166/ADE7169
Result
No V
8 min
2 min
1 min
Result
No battery measurement
16 min
4 min
1 min
Result
No temperature measurements
8 min
2 min
1 min
DCIN
measurement