LTC1443IS#TR Linear Technology, LTC1443IS#TR Datasheet - Page 7

• Manufacturer Part Number: LTC1443IS#TR
• Description: IC COMP QUAD LP 1.182VREF 16SOIC
• Manufacturer: Linear Technology
• Type: with Voltage Referencer

Specifications of LTC1443IS#TR

• Number Of Elements: 4
• Output Type: CMOS, TTL
• Voltage - Supply: 2 V ~ 11 V, ±1 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIO S I FOR ATIO
PI FU CTIO S
The LTC1443/LTC1444/LTC1445 is a family of quad
micropower comparators with a built-in reference (1.182V
for the LTC1443 and 1.221V for the LTC1444/LTC1445).
Features include programmable hysteresis (LTC1444/
LTC1445), wide supply voltage range (2V to 11V) and the
ability of the reference to drive up to a 0.01µF capacitor
without oscillation. The comparator CMOS outputs
(LTC1443/LTC1445) can source up to 40mA while the
LTC1444 has an open-drain output to V
current glitches that normally occur when the comparator
output switches states have been eliminated.
Power Supplies
The comparator family operates from a single 2V to 11V
supply. The LTC1443 includes a separate ground for the
comparator output stage, allowing a split supply ranging
from ±1V to ±5.5V. Connecting V
allows single supply operation. If the comparator output
is required to source more than 1mA or the supply source
impedance is high, V
capacitor.
IN B
common mode range from V
typically 10pA at 25°C.
REF (Pin 8): Reference Output. With respect to V
source up to 200µA and sink 15µA at 25°C. Drive 0.01µF
bypass capacitor without oscillation.
V
supply operation on LTC1443.
IN C
common mode range from V
typically 10pA at 25°C.
IN C
common mode range from V
typically 10pA at 25°C.
IN D
common mode range from V
typically 10pA at 25°C.
–
U
(Pin 9): Negative Supply. Connect to ground for single
+
+
–
–
(Pin 11): Noninverting Input of Comparator C. Input
(Pin 7): Noninverting Input of Comparator B. Input
(Pin 12): Inverting Input of Comparator D. Input
(Pin10): Inverting Input of Comparator C. Input
U
U
U
+
should be bypassed with a 0.1µF
U
–
–
–
–
to V
to V
to V
to V
–
to GND on the LTC1443
+
+
+
+
W
– 1.3V. Input current
– 1.3V. Input current
– 1.3V. Input current
– 1.3V. Input current
–
. The supply
U
–
. Can
IN D
common mode range from V
typically 10pA at 25°C.
GND (Pin 14): LTC1443 Ground. Connect to V
supply operation.
HYST (Pin 14): LTC1444/LTC1445 Hysteresis Input. Con-
nect to REF if not used. Input voltage range is from V
to V
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.
Comparator Inputs
The comparator inputs can swing from the negative sup-
ply (V
(V
V
is only ±10pA.
Comparator Outputs
The LTC1443 comparator output swings between GND
and V
LTC1444 and LTC1445 outputs swing between V
The outputs are capable of sourcing up to 40mA (LTC1443/
LTC1445) and sinking up to 5mA while still maintaining
microampere quiescent currents. The output stage does
not generate crowbar switching currents during transi-
tions which helps minimize parasitic feedback through the
supply pins.
Voltage Reference
The internal bandgap reference has a voltage of 1.182V for
LTC1443 or 1.221V for LTC1444/LTC1445 referenced to
+
+
without damage, and the typical input leakage current
). The inputs can be forced 300mV below V
REF
+
+
(Pin 13): Noninverting Input of Comparator D. Input
–
to assure TTL compatibility with a split supply. The
) to within 1.3V maximum of the positive supply
– 50mV.
LTC1443/LTC1444/LTC1445
–
to V
+
– 1.3V. Input current
–
–
for single
–
or above
and V
144345fc
7
REF
+
.