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1841

Ultralow Power Dual Comparators with Reference

Linear Technology 

LTC1841/LTC1842/LTC1843

ELECTRICAL CHARACTERISTICS V+ = 5V, V– = 0V, TA = 25°C unless otherwise noted.

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

tPD

Propagation Delay

ILEAK Output Leakage Current

VOL

Output Low Voltage

Reference (LTC1842/LTC1843)

VREF Reference Voltage

∆VREF Load Regulation

en

Voltage Noise

COUT = 10pF, RPULL-UP = 100k Overdrive = 10mV

Overdrive = 100mV

VOUT = 12V (Note 2)

q

IOUT = 1.8mA

q

No Load

ISOURCE = 1mA

ISINK =10µA

100Hz to 100kHz

25°C

0°C to 70°C

– 40°C to 85°C

1.174

q 1.170

q 1.164

q

q

12

4

1

1.182

1

1.75

100

MAX

100

V – + 0.4V

1.190

1.194

1.200

3

4

6

UNITS

µs

µs

nA

V

V

V

V

mV

mV

mV

µVRMS

V + = 3V, V – = 0V, TA = 25°C unless otherwise noted.

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Power Supply

V+

Supply Voltage Range

LTC1841

LTC1842/LTC1843

q

2.0

q

2.5

11

V

11

V

ICC

Supply Current

Comparator

HYST = REF (Note 2)

q

3.5

5.5

µA

VOS

IIN

VIN

PSRR

CMRR

VHYST

tPD

Comparator Input Offset Voltage

Input Leakage Current (IN +, IN –)

Comparator Input Voltage Range

Power Supply Rejection Ratio

Common Mode Rejection Ratio

Hysteresis Input Voltage Range

Propagation Delay

(Note 3)

IN + = IN – = 1.5V (LTC1841),

IN + = IN – = VREF (LTC1842/LTC1843)

V + = 2V to 11V (LTC 1841),

V + = 2.5V to 11V (LTC1842/LTC1843)

VCM = V – to (V + – 1.3V) LTC1841

LTC1842/LTC1843

COUT = 10pF, RPULL-UP = 100k Overdrive = 10mV

Overdrive = 100mV

q

±3

q

±0.01

q

V–

0.1

q

0.1

q VREF – 50mV

14

5

± 10

±1

V + – 1.3V

1

1

VREF

mV

nA

V

mV/V

mV/V

V

µs

µs

ILEAK Output Leakage Current

VOL

Output Low Voltage

Reference (LTC1842/LTC1843)

VOUT = 12V (Note 2)

IO = 0.8mA

q

1

100

nA

q

V – + 0.4V

V

VREF Reference Voltage

No Load

25°C

1.174 1.182 1.190

V

0°C to 70°C

q 1.170

1.194

V

– 40°C to 85°C

q 1.164

1.200

V

∆VREF Load Regulation

ISOURCE = 1mA

ISINK =10µA

q

2

6

mV

1.75

4

mV

q

6

mV

en

Voltage Noise

100Hz to 100kHz

100

µVRMS

The q denotes specifications which apply over the full operating

temperature range.

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: IN + = IN – + 80mV, output is in high impedance state.

Note 3: VCM = 1/2(V + – V –) for LTC1841, VCM = VREF for LTC1842/

LTC1843.

3

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