Datasheet

LTC1443/LTC1444/LTC1445
7
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 V
REF
to V
REF
– 50mV.
OUT D (Pin 15): Comparator D Output. (Open-drain output
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
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
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
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
144345 PF
1.2V
+
–