LTC2995

1

2995f

TYPICAL APPLICATION

FEATURES

DESCRIPTION

Temperature Sensor and

Dual Voltage Monitor with

Alert Outputs

and dual supply monitor. It converts the temperature of

an external diode sensor and/or its own die temperature

to an analog output voltage while rejecting errors due to

noise and series resistance. Two supply voltages and the

measured temperature are compared against upper and

lower limits set with resistive dividers. If a threshold is

exceeded, the device communicates an alert by pulling

low the correspondent open drain logic output.

The LTC2995 gives ±1°C accurate temperature results

using commonly available NPN or PNP transistors or

temperature diodes built into modern digital devices. Volt-

ages are monitored with 1.5% accuracy. A 1.8V reference

output simplifies threshold programming and can be used

as an ADC reference input.

The LTC2995 provides an accurate, low power solution for

temperature and voltage monitoring in a compact 3mm ×

3mm QFN package.

Dual OV/UV Supply and Single OT/UT Remote Temperature Monitor

APPLICATIONS

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Diode Temperature

REMOTE DIODE TEMPERATURE (°C)

–50

0.8

1.0

1.2

1.4

050

100

150

2995 TA01b

1.6

1.8

–25

25

75

125

PS

DS

VH1

VL1

VH2

VL2

TO2

TO1

OV

UV

LTC2995

2.5V

1.2V

0.1μF

64.4k

10.2k

45.3k

2995 TA01a

VT1

VT2

GND

TMR

20k

20k

140k

470pF

TEMPERATURE

SENSOR

ASIC

SYSTEM

MONITOR

OT T > 125°C

4mV/K

UT T < 75°C

+10%

–10%

45.3k

10.2k

194k

5nF