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LTC2986CLX#PBF

Description
IC SENSOR TEMP MEASUREMNT 48LQFP
Categorysemiconductor    Power management   
File Size897KB,90 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC2986CLX#PBF Overview

IC SENSOR TEMP MEASUREMNT 48LQFP

LTC2986CLX#PBF Parametric

Parameter NameAttribute value
FunctionTemperature monitoring system (sensor)
sensor typeexternal
Sensing temperature-265°C ~ 1800°C
Accuracy-
TopologyADC (sigma delta), multiplexer, register set
Output typeSPI
Output alarmnone
Output fannone
Voltage - Power2.85 V ~ 5.25 V
Operating temperature0°C ~ 70°C
Installation typesurface mount
Package/casing48-LQFP
Supplier device packaging48-LQFP(7x7)
FEATURES
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LTC2986/LTC2986-1
Multi-Sensor High
Accuracy Digital Temperature
Measurement System with EEPROM
DESCRIPTION
The
LTC 2986
measures a wide variety of temperature
sensors and digitally outputs the result, in °C or °F with
,
0.1°C accuracy and 0.001°C resolution. The LTC2986 can
measure the temperature of virtually all standard (Type B,
E, J, K, N, S, R, T) or custom thermocouples, automatically
compensate for cold junction temperatures and linearize
the results. The device can also measure temperature
with standard 2-, 3- or 4-wire RTDs, thermistors, and
diodes. The LTC2986 includes excitation current sources
and fault detection circuitry appropriate for each type of
temperature sensor.
®
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Directly Digitizes 2-, 3- or 4-Wire RTDs,
Thermocouples, Thermistors, and Diodes
On-Chip EEPROM (LTC2986-1) Stores Channel
Configuration Data and Custom Coefficients
Single 2.85V to 5.25V Supply
10 Flexible Inputs Allow Interchanging Sensors
Automatic Thermocouple Cold Junction Compensation
Built-In Standard and User-Programmable Coefficients
for Thermocouples, RTDs and Thermistors
Measures Negative Thermocouple Voltages
Automatic Burn Out, Short-Circuit and Fault Detection
Buffered Inputs Allow External Protection
Simultaneous 50Hz/60Hz Rejection
Includes 15ppm/°C (Max) Reference
Includes Special Protection Modes
Direct Thermocouple Measurements
Direct RTD Measurements
Direct Thermistor Measurements
Custom Sensor Applications
APPLICATIONS
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The LTC2986/LTC2986-1 are 10-channel software and pin-
compatible versions of the 20-channel LTC2983/LTC2984.
Additional features include special modes that enable easy
protection in universal multi-sensor applications, custom
tables for generic ADC readings, and direct temperature
readout from active analog temperature sensors. The
LTC2986-1 is the EEPROM version of the LTC2986.
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.
Patents Pending
TYPICAL APPLICATION
Thermocouple Measurement with Automatic Cold Junction Compensation
2.85V TO 5.25V
1k
0.1µF
1k
24-BIT
∆∑ ADC
LTC2986-1
Typical Temperature Error
Contribution
0.5
0.4
0.3
0.2
ERROR (°C)
0.1
0
–0.1
–0.2
–0.3
–0.4
3904 DIODE
RTD
THERMISTOR
THERMOCOUPLE
R
SENSE
2k
24-BIT
∆∑ ADC
LINEARIZATION/
FAULT DETECTION
SPI
INTERFACE
°C/°F
4 3
PT-100
RTD
24-BIT
∆∑ ADC
V
REF
(15ppm/°C)
COM
29861 TA01a
–0.5
–200 0
200 400 600 800 1000 1200 1400
TEMPERATURE (°C)
29861 TA01b
2
1
EEPROM
29861fa
For more information
www.linear.com/LTC2986
1

LTC2986CLX#PBF Related Products

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Description IC SENSOR TEMP MEASUREMNT 48LQFP IC SENSOR TEMP MEASUREMNT 48LQFP IC SENSOR TEMP MEASUREMNT 48LQFP IC SENSOR TEMP MEASUREMNT 48LQFP IC SENSOR TEMP MEASUREMNT 48LQFP IC SENSOR TEMP MEASUREMNT 48LQFP
Function Temperature monitoring system (sensor) Temperature monitoring system (sensor) Temperature monitoring system (sensor) Temperature monitoring system (sensor) Temperature monitoring system (sensor) Temperature monitoring system (sensor)
sensor type external external external external external external
Sensing temperature -265°C ~ 1800°C -265°C ~ 1800°C -265°C ~ 1800°C -265°C ~ 1800°C -265°C ~ 1800°C -265°C ~ 1800°C
Topology ADC (sigma delta), multiplexer, register set ADC (sigma delta), multiplexer, register set ADC (sigma delta), multiplexer, register set ADC (sigma delta), multiplexer, register set ADC (sigma delta), multiplexer, register set ADC (sigma delta), multiplexer, register set
Output type SPI SPI SPI SPI SPI SPI
Output alarm none none none none none none
Output fan none none none none none none
Voltage - Power 2.85 V ~ 5.25 V 2.85 V ~ 5.25 V 2.85 V ~ 5.25 V 2.85 V ~ 5.25 V 2.85 V ~ 5.25 V 2.85 V ~ 5.25 V
Operating temperature 0°C ~ 70°C -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C -40°C ~ 125°C -40°C ~ 125°C
Installation type surface mount surface mount surface mount surface mount surface mount surface mount
Package/casing 48-LQFP 48-LQFP 48-LQFP 48-LQFP 48-LQFP 48-LQFP
Supplier device packaging 48-LQFP(7x7) 48-LQFP(7x7) 48-LQFP(7x7) 48-LQFP(7x7) 48-LQFP(7x7) 48-LQFP(7x7)
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