LT1716_15 Datasheet, PDF (1/12 Pages) Linear Technology – SOT-23, 44V, Over-the-Top, Micropower, Precision Rail-to-Rail Comparator

FEATURES
n _{Operates from 2.7V to 44V}
n _Over-The-Top^®_{: Input Common Mode Range}
Extends 44V Above V^–, Independent of V⁺
n _{Micropower: 35μA IQ}
n _{Offset Voltage: 1.5mV Max}
n _{Valid Output with Either Input 5V Below V}^–
n _{Rail-to-Rail Output Swing}
n _{Output Can Drive Loads Above V}⁺
n _{Internal Pull-Up Current}
n _{–40°C to 125°C Operating Temperature Range}
n _{Low Profile (1mm) SOT-23 (ThinSOT™) Package}
APPLICATIONS
n _{Power Supply Monitors}
n _{Relay/Lamp Driver}
n _Oscillators
n _{Peak Detector}
n _{Level Shifting}
LT1716
SOT-23, 44V, Over-the-Top,
Micropower, Precision
Rail-to-Rail Comparator
DESCRIPTION
The LT^®1716 comparator operates on any total power
supply voltage between 2.7V and 44V drawing 35μA of
quiescent current. The LT1716 has a unique input stage
that can be taken 44V above V^–, independent of V⁺ supply.
(Built-in resistors protect the inputs for faults below the
negative supply of up to 5V.) The inputs can withstand
44V both differential and common mode.
The output stage includes a class “B” pull-up current
source, eliminating the need for an external resistive
pull-up and saving power. Output voltage swings to within
35mV of the negative supply and 55mV of the positive
supply, which makes the comparator a good choice for
low voltage single supply operation. The output stage is
also designed to drive loads connected to a higher supply
than the LT1716 supply, the same as an open collector
output stage.
The LT1716 is available in a SOT-23 5-lead package.
L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Lamp Monitor
5V TO 44V
1M ^{3V 0.1μF}
LAMP
ON/OFF
R_S
0.15Ω
1W
0.25A TO 2.5A
100k
CMPD6001
5k
4_– ⁵
0.04
R_S ≥
I_L
LT1716
3₊
2
1716 TA01
1 _{LAMP GOOD}
Input Bias Current vs Input Bias Voltage
12μ
V_S = 5V, 0V
8μ
4μ ^INPUT
BELOW
6n _SUPPLY
3n
INPUT
ABOVE
SUPPLY
+IN = 10V
0
+IN = 2V
–3n
+IN = 2V
–6n
–100m
–0.5m
–1m
–1.5m
–10 –5 0
5 10 15 20 45
V_IN– (V)
1716 TA02
1716fa
1