ADE7569_15 datasheet(77/152 Pages) AD

77 / 152 page

ADE7116/ADE7156/ADE7166/ADE7169/ADE7566/ADE7569

Rev. B | Page 77 of

152

TEMPERATURE, BATTERY, AND SUPPLY VOLTAGE MEASUREMENTS

The ADE7156/ADE7166/ADE7169/ADE7566/ADE7569 include

temperature measurements as well as battery and supply voltage

measurements. (This feature is not available in the ADE7116.)

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. All ADC measurements are

configured through the SFRs, as shown in Table 48.

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.

Table 48. Temperature, Battery, and Supply Voltage Measurement SFRs

SFR Address

R/W

Mnemonic

Description

0xF9

R/W

STRBPER

Peripheral ADC strobe period (see Table 49).

0xF3

R/W

DIFFPROG

Temperature and supply delta (see Table 50).

0xD8

R/W

ADCGO

Start ADC measurement (see Table 51).

0xFA

R/W

BATVTH

Battery detection threshold (see Table 52).

0xEF

R/W

VDCINADC

VDCIN ADC value (see Table 53).

0xDF

R/W

BATADC

Battery ADC value (see Table 54).

0xD7

R/W

TEMPADC

Temperature ADC value (see Table 55).

Table 49. Peripheral ADC Strobe Period SFR (STRBPER, Address 0xF9)

Bit

Mnemonic

Default

Description

[7:6]

Reserved

These bits must be kept at 0 for proper operation.

[5:4]

VDCIN_PERIOD

Period for background external voltage measurements.

VDCIN_PERIOD

Result

No VDCIN measurement

8 min

2 min

1 min

[3:2]

BATT_PERIOD

Period for background battery level measurements.

BATT_PERIOD

Result

No battery measurement

16 min

4 min

1 min

[1:0]

TEMP_PERIOD

Period for background temperature measurements.

TEMP_PERIOD

Result

No temperature measurement

8 min

2 min

1 min

ADE7569 Datasheet(PDF) 77 Page - Analog Devices

ADE7569 Datasheet(HTML) 77 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL