MCU/

FPGA/

ASIC

GPIO

GPIO/

COMP

LMT01-SP

VP

VN

Up to 2m

Min 2.0V

LMT01 Pulse Count Interface

Power Off

Conversion Time

ADC Conversion Result

Power On

-1.0

-0.8

-0.6

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.0

±50

±25

0

25

50

75

100

125

150

LMT01 Junction Temperaure (

ƒC)

C014

Max Limit

Min Limit

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

LMT01-SP

SNIS205 – JANUARY 2019

LMT01-SP radiation hardened 2-pin precision digital output temperature sensor

1

1 Features

1

•

5962R18211301VXC

–

Radiation Hardness Assured (RHA) to 100-

krad(Si) Total Ionizing Dose (TID)

–

Single Event Latchup (SEL) immune to LET =

–

2-lead HTA ceramic package

•

1.5°C accuracy over –50°C to 150°C wide

temperature range and radiation

•

Pulse count current loop easily read by processor

–

Number of output pulses is proportional to

temperature with 0.0625°C resolution

•

Communication frequency: 88 kHz

•

Conversion current: 34 µA

•

Continuous conversion plus data-transmission

period: 100 ms

•

Floating 2-V to 5.5-V (VP – VN) supply operation

with integrated EMI immunity

2 Applications

•

Thermistor signal chain upgrade

•

Space analog temp sensor upgrade

•

Space satellite telemetry

•

High-speed signal chain monitoring

•

Power supply monitoring

•

Digital output wired probes

3 Description

The LMT01-SP device is a radiation hardened, high-

accuracy, 2-pin temperature sensor with an easy-to-

use pulse count current loop interface. The pulsed

output is designed to easily interface directly with a

comparator or GPIO input, thereby simplifying the

hardware implementation. For space applications

looking to minimize board area, the LMT01-SP is an

ideal replacement for traditional thermistor signal

chains and is inherently robust against single event

effects. Integrated EMI suppression and a simple 2-

pin architecture makes the device suitable for sensing

in a noisy environment. The LMT01-SP can be

mounted directly to a board or converted into a two-

wire temperature probe with a wire length up to two

meters. It can also be used to replace thermistors or

analog temperature sensors in space applications

with the added benefit of connecting directly to an

MCU or FPGA without the need for amplifiers or

ADCs for signal conditioning, reducing board space

and power consumption.

Device Information(1)

PART NUMBER

GRADE

PACKAGE

5962R18211301VXC

RHA - 100 krad(Si)

HTA (2)

5.57 mm × 3.00 mm

LMT01SPHTA/EM

Engineering

Evaluation(2)

PLMT01SPHTA/EM

Prototype

Engineering

Evaluation(2)

LMT01CVAL-EVM

Evaluation

Module(2)

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

(2) These units are intended for engineering evaluation only.

They are processed to a noncompliant flow. These units are

not suitable for qualification, production, radiation testing or

flight use. Parts are not warranted for performance over the

full MIL specified temperature range of –55°C to 125°C or

operating life.

LMT01-SP Accuracy

Typical units plotted in center of curve.

2-Pin IC Temperature Sensor