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LTC1998IS6-TR

2.5µA, 1% Accurate SOT-23 Comparator and Voltage Reference for Battery Monitoring

Linear Technology 

LTC1998

PIN FUNCTIONS

BATT (Pin 1): Battery Voltage to be monitored. Supply

current is also drawn from this pin. Board layout should

connect this pin to the battery(+) terminal, through a trace

that does not conduct load current.

GND (Pin 2): Ground should be connected to the battery

(–) terminal through a trace that does not conduct load

return current.

VTH.A (Pin 3): Threshold Adjust Pin. Adjusts the low battery

threshold voltage, VBATT.Th = 2.5V + (VTH.A/2). VTH.A can be

supplied by a voltage source or a resistor divider.

VH.A (Pin 4): Hysteresis Adjust. Hysteresis threshold

voltage VTH2 = 2.5V + (VH.A/2). VH.A can be supplied by

a voltage source or resistor divider. VH.A must always be

programmed to a higher potential than VTH.A. Hysteresis

voltage, VHYST = VTH2 – VBATT.Th.

VLOGIC (Pin 5): Positive Supply Voltage for Output Driver.

This voltage can be driven from an external logic supply

or tied to BATT.

BATTLO (Pin 6): Output of Comparator. Low for BATT

< VBATT.Th (low battery threshold voltage). Output state

guaranteed for VBATT ≥ 1.5V.

1998fa

6

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