6
LTC1841/LTC1842/LTC1843
PIN FUNCTIONS
UUU
OUT A (Pin 1): Comparator A Open-Drain Output. Output
can typically sink greater than 20mA.
V
–
(Pin 2): Negative Supply.
IN A
+
(Pin 3): Noninverting Input of Comparator A. Input
common mode range extends from V
–
to V
+
– 1.3V. Input
current is typically 10pA at 25°C.
IN A
–
(Pin 4) (LTC1841): Inverting Input of Comparator A.
Input common mode range extends from V
–
to V
+
– 1.3V.
Input current is typically 10pA at 25°C.
IN B
+
(Pin 4) (LTC1842): Noninverting Input of Compara-
tor B. Input common mode range extends from V
–
to
V
+
– 1.3V. Input current is typically 10pA at 25°C.
IN B
–
(Pin 4) (LTC1843): Inverting Input of Comparator B.
Input common mode range extends from V
–
to V
+
– 1.3V.
Input current is typically 10pA at 25°C.
IN B
–
(Pin 5) (LTC1841): Inverting Input of Comparator B.
Input common mode range extends from V
–
to V
+
– 1.3V.
Input current is typically 10pA at 25°C.
HYST (Pin 5) (LTC1842/LTC1843): Hysteresis Input.
Connect to REF if not used. Input voltage range is from
V
REF
to V
REF
– 50mV.
IN B
+
(Pin 6) (LTC1841): Noninverting Input of Compara-
tor B. Input common mode range extends from V
–
to
V
+
– 1.3V. Input current is typically 10pA at 25°C.
REF (Pin 6) (LTC1842/LTC1843): Reference Output.
1.182V with respect to V
–
. Can typically source greater
than 1mA and sink 10µA at 25°C. Can drive 0.01µF bypass
capacitor without oscillation.
V
+
(Pin 7) (LTC1841): Positive Supply. 2V to 11V.
V
+
(Pin 7) (LTC1842/LTC1843): Positive Supply. 2.5V to
11V.
OUT B (Pin 8): Comparator B Open-Drain Output. Output
can typically sink greater than 20mA.
1841 PD
V
–
V
+
OUT A
LTC1841
1
2
3
4
8
7
6
5
IN A
+
IN A
–
IN B
+
IN B
–
OUT B
–
+
–
+
A
B
1842 PD
V
–
V
–
V
+
OUT A
LTC1842
1
2
3
4
8
7
6
5
IN A
+
IN B
+
REF
HYST
OUT B
–
+
–
+
A
B
1843 PD
V
–
V
–
V
+
OUT A
LTC1843
1
2
3
4
8
7
6
5
IN A
+
IN B
–
REF
HYST
OUT B
–
+
–
+
A
B
