ADM800L datasheet(2/12 Pages) AD

2 / 12 page

ADM691A/ADM693A/ADM800L/M–SPECIFICATIONS

–2–

REV. 0

(VCC = 4.75 V to 5.5 V (ADM691A, ADM800L) 4.5 V to 5.5 V (ADM693A, ADM800M) VBATT = +2.8 V, TA = TMIN to TMAX unless otherwise noted)

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

BATTERY BACKUP SWITCHING

VCC, VBATT Operating Voltage Range

5.5

VOUT Output Voltage

VCC – 0.05

VCC – 0.02

IOUT = 25 mA

VCC – 0.3

VCC – 0.2

IOUT = 250 mA

VCC to VOUT Output Resistance

0.8

1.2

Ω

VCC = 4.5 V

VOUT in Battery Backup Mode

VBATT – 0.3

VBATT = 4.5 V, IOUT = 20 mA

VBATT – 0.25

VBATT = 2.8 V, IOUT = 10 mA

VBATT – 0.15

VBATT = 2.0 V, IOUT = 5 mA

VBATT to VOUT Output Resistance

Ω

VBATT = 4.5 V

Ω

VBATT = 2.8 V

Ω

VBATT = 2.0 V

Supply Current (Excludes IOUT)

100

µAV

CC > (VBATT – 1 V)

Supply Current in B. Backup (Excludes IOUT)

0.04

µAV

CC < (VBATT – 1.2 V), VBATT = 2.8 V

Battery Standby Current

5.5 V > VCC > VBATT + 0.2 V

(+ = Discharge, – = Charge)

–0.1

+0.02

µA(V

BATT +0.2 V) < VCC , TA = +25°C

–1.0

+0.02

µA(V

BATT +0.2 V) < VCC

Battery Switchover Threshold

VBATT + 0.03

Power Up

VCC–VBATT

VBATT – 0.03

Power Down

Battery Switchover Hysteresis

BATT ON Output Voltage Low

0.1

0.4

ISINK = 3.2 mA

0.7

1.5

ISINK = 25 mA

BATT ON Output Short Circuit Current

Sink Current

100

µA

Source Current

RESET AND WATCHDOG TIMER

Reset Voltage Threshold

ADM691A, ADM800L

4.5

4.65

4.75

ADM693A, ADM800M

4.25

4.40

4.50

ADM800L, VCC Falling

4.55

4.70

TA = +25°C

ADM800M, VCC Falling

4.3

4.45

TA = +25°C

Reset Threshold Hysteresis

VCC to RESET Delay

µs

Power Down

LOW LINE

to RESET Delay

800

Reset Timeout Period Internal Oscillator

140

200

280

Power Up

Reset Timeout Period External Clock

2048

Cycles

Power Up

Watchdog Timeout Period, Internal Oscillator

1.0

1.6

2.25

Long Period

100

140

Short Period

Watchdog Timeout Period, External Clock

4096

Cycles

Long Period

1024

Cycles

Short Period

Minimum WDI Input Pulse Width

100

VIL = 0.4, VIH = 0.75 × VCC

RESET

Output Voltage

0.004

0.3

ISINK = 50 µA, VCC = 1 V, VBATT = 0 V

0.1

0.4

ISINK = 3.2 mA, VCC = 4.25 V

3.5

ISOURCE = 1.6 mA, VCC = 5 V

RESET

Output Short Circuit Current

RESET Output Voltage Low

0.1

0.4

ISINK = 3.2 mA

LOW LINE

Output Voltage

0.4

ISINK = 3.2 mA, VCC = 4.25 V

3.5

ISOURCE = 1 µA, VCC = 5 V

LOW LINE Short Circuit Source Current

100

µA

WDO

Output Voltage

0.4

ISINK = 3.2 mA, VCC = 4.25 V

3.5

ISOURCE = 500 µA, VCC = 5 V

WDO Short Circuit Source Current

WDI Input Threshold

Logic Low

0.8

Logic High

0.75

× V

WDI Input Current

–50

–10

µA

WDI = 0 V

µA

WDI = VOUT

POWER FAIL DETECTOR

PFI Input Threshold ADM69xA

1.2

1.25

1.3

VCC = 5 V

PFI Input Threshold ADM800L/M

1.225

1.25

1.275

VCC = 5 V

PFI Input Current

±0.01

±25

PFO

Output Voltage

0.4

ISINK = 3.2 mA

3.5

ISOURCE = 1 µA

PFO

Short Circuit Source Current

100

µA

PFI

to PFO Delay

µsV

IN = –20 mV

µsV

IN = 20 mV

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