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TMP05 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer TMP05
Beschreibung 0.5C Accurate PWM Temperature Sensor in 5-Lead SC-70
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 28 Seiten
TMP05 Datasheet, Funktion
±0.5°C Accurate PWM
Temperature Sensor in 5-Lead SC-70
TMP05/TMP06
FEATURES
Modulated serial digital output, proportional to
temperature
±0.5°C accuracy at 25°C
±1.0°C accuracy from 25°C to 70°C
Two grades available
Operation from −40°C to +150°C
Operation from 3 V to 5.5 V
Power consumption 70 µW maximum at 3.3 V
CMOS/TTL-compatible output on TMP05
Flexible open-drain output on TMP06
Small, low cost 5-lead SC-70 and SOT-23 packages
APPLICATIONS
Isolated sensors
Environmental control systems
Computer thermal monitoring
Thermal protection
Industrial process control
Power-system monitors
GENERAL DESCRIPTION
The TMP05/TMP06 are monolithic temperature sensors that
generate a modulated serial digital output (PWM), which varies
in direct proportion to the temperature of the devices. The high
period (TH) of the PWM remains static over all temperatures,
while the low period (TL) varies. The B Grade version offers a
higher temperature accuracy of ±1°C from 0°C to 70°C with
excellent transducer linearity. The digital output of the TMP05/
TMP06 is CMOS/TTL compatible, and is easily interfaced to
the serial inputs of most popular microprocessors. The flexible
open-drain output of the TMP06 is capable of sinking 5 mA.
The TMP05/TMP06 are specified for operation at supply
voltages from 3 V to 5.5 V. Operating at 3.3 V, the supply current
is typically 370 µA. The TMP05/TMP06 are rated for operation
over the –40°C to +150°C temperature range. It is not recom-
mended to operate these devices at temperatures above 125°C
for more than a total of 5% (5,000 hours) of the lifetime of the
devices. They are packaged in low cost, low area SC-70 and
SOT-23 packages.
FUNCTIONAL BLOCK DIAGRAM
VDD
5
TMP05/TMP06
TEMPERATURE
SENSOR
REFERENCE
Σ-
CORE
AVERAGING
BLOCK /
COUNTER
1 OUT
CONV/IN 2
CLK AND
TIMING
GENERATION
OUTPUT
CONTROL
3 FUNC
4
GND
Figure 1.
The TMP05/TMP06 have three modes of operation: continu-
ously converting mode, daisy-chain mode, and one shot mode.
A three-state FUNC input determines the mode in which the
TMP05/TMP06 operate.
The CONV/IN input pin is used to determine the rate with
which the TMP05/TMP06 measure temperature in continu-
ously converting mode and one shot mode. In daisy-chain
mode, the CONV/IN pin operates as the input to the daisy
chain.
PRODUCT HIGHLIGHTS
1. The TMP05/TMP06 have an on-chip temperature sensor
that allows an accurate measurement of the ambient
temperature. The measurable temperature range is –40°C
to +150°C.
2. Supply voltage is 3.0 V to 5.5 V.
3. Space-saving 5-lead SOT-23 and SC-70 packages.
4. Temperature accuracy is typically ±0.5°C. The part needs a
decoupling capacitor to achieve this accuracy.
5. 0.025°C temperature resolution.
6. The TMP05/TMP06 feature a one shot mode that reduces
the average power consumption to 102 µW at 1 SPS.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.






TMP05 Datasheet, Funktion
TMP05/TMP06
Parameter
TMP05 OUTPUT (PUSH-PULL)4
Output High Voltage, VOH
Output Low Voltage, VOL
Output High Current, IOUT5
Pin Capacitance
Rise Time,6 tLH
Fall Time,6 tHL
RON Resistance (Low Output)
TMP06 OUTPUT (OPEN DRAIN)4
Output Low Voltage, VOL
Output Low Voltage, VOL
Pin Capacitance
High Output Leakage Current, IOH
Device Turn-On Time
Fall Time,7 tHL
DIGITAL INPUTS4
Input Current
Input Low Voltage, VIL
Input High Voltage, VIH
Pin Capacitance
Min Typ
VDD − 0.3
2
10
50
50
55
10
0.1
20
30
0.7 × VDD
3
Max Unit
V
0.4 V
mA
pF
ns
ns
0.4 V
1.2 V
pF
5 µA
ms
ns
±1
0.3 × VDD
10
µA
V
V
pF
Test Conditions/Comments
IOH = 800 µA
IOL = 800 µA
Typ VOH = 3.17 V with VDD = 3.3 V
Supply and temperature dependent
IOL = 1.6 mA
IOL = 5.0 mA
PWMOUT = 5.5 V
VIN = 0 V to VDD
1 The accuracy specifications for 3.0 V to 3.6 V supply range are specified to 3-sigma performance. See Figure 22.
2 It is not recommended to operate the device at temperatures above 125°C for more than a total of 5% (5,000 hours) of the lifetime of the device. Any exposure beyond
this limit affects device reliability.
3 Normal mode current relates to current during TL. TMP05/TMP06 are not converting during TH, so quiescent current relates to current during TH.
4 Guaranteed by design and characterization, not production tested.
5 It is advisable to restrict the current being pulled from the TMP05 output, because any excess currents going through the die cause self-heating. As a consequence,
false temperature readings can occur.
6 Test load circuit is 100 pF to GND.
7 Test load circuit is 100 pF to GND, 10 kΩ to 5.5 V.
Rev. 0 | Page 6 of 28

6 Page









TMP05 pdf, datenblatt
TMP05/TMP06
3.5
3.0
VDD = 5.5V
2.5
2.0
VDD = 5V
1.5
1.0
0.5
0
–40 –20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
Figure 18. Temperature Offset vs. Power Supply Variation from 3.3 V
140
120
100
80
60
40
20
0
0
FINAL TEMPERATURE = 120°C
TEMPERATURE OF
ENVIRONMENT (30°C)
CHANGED HERE
10 20 30 40 50 60
TIME (Seconds)
Figure 19. Response to Thermal Shock
70
1.25
VDD = 3.3V
AMBIENT TEMPERATURE = 25°C
1.00
0.75
0.50
0.25
0
0 5 10 15 20 25 30
LOAD CURRENT (mA)
Figure 20. TMP05 Temperature Error vs. Load Current
Rev. 0 | Page 12 of 28

12 Page





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