LTC1444CDHD datasheet(7/14 Pages) LINER

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LTC1443/LTC1444/LTC1445

144345fe

pin FuncTions

OUT B (Pin 1): Comparator B Output. (Open-drain output

for LTC1444). Output can source up to 40mA (LTC1443,

LTC1445) and sink 5mA.

OUT A (Pin 2): Comparator A Output. (Open-drain output

for LTC1444). Output can source up to 40mA (LTC1443,

LTC1445) and sink 5mA.

V+ (Pin 3): Positive Supply.

IN A– (Pin 4): Inverting Input of Comparator A. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

IN A+ (Pin 5): Noninverting Input of Comparator A. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

IN B– (Pin 6): Inverting Input of Comparator B. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

IN B+ (Pin 7): Noninverting Input of Comparator B. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

REF (Pin 8): Reference Output. With respect to V–. Can

source up to 200µA and sink 15µA at 25°C. Drive 0.01µF

bypass capacitor without oscillation.

V– (Pin 9): Negative Supply. Connect to ground for single

supply operation on LTC1443.

IN C– (Pin10): Inverting Input of Comparator C. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

IN C+ (Pin 11): Noninverting Input of Comparator C. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

IN D– (Pin 12): Inverting Input of Comparator D. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

IN D+ (Pin 13): Noninverting Input of Comparator D. Input

common mode range from V– to V+ – 1.3V. Input current

typically 10pA at 25°C.

GND (Pin 14): LTC1443 Ground. Connect to V– for single

supply operation.

HYST (Pin 14): LTC1444/LTC1445 Hysteresis Input. Con-

nect to REF if not used. Input voltage range is from VREF

to VREF – 50mV.

OUTD(Pin15):ComparatorDOutput.(Open-drainoutput

for LTC1444). Output can source up to 40mA (LTC1443,

LTC1445) and sink 5mA.

OUT C (Pin 16): Comparator C Output. (Open-drain output

for LTC1444). Output can source up to 40mA (LTC1443,

LTC1445) and sink 5mA.

Exposed Pad (Pin 17, DFN Package): This pin is internally

connected to V–. Connection is optional, but will improve

thermal dissipation.

–

OUT B

OUT A

V+

IN A–

IN A+

IN B –

IN B+

REF

OUT C

OUT D

GND

IN D+

IN D–

IN C+

IN C–

V–

–

LTC1443

1.2V

+ –

–

OUT B

OUT A

V+

IN A–

IN A+

IN B –

IN B+

REF

OUT C

OUT D

HYST

IN D+

IN D–

IN C+

IN C–

V–

–

LTC1444/LTC1445

144345 PF

1.2V

+ –

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