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零件编号 | TMP300 | ||
描述 | Resistor-Programmable TEMPERATURE SWITCH | ||
制造商 | Burr-Brown | ||
LOGO | |||
1 Page
BurrĆBrown Products
from Texas Instruments
TMP300
SBOS335A – JUNE 2005 – REVISED SEPTEMBER 2007
1.8V, Resistor-Programmable
TEMPERATURE SWITCH and
ANALOG OUT TEMPERATURE SENSOR in SC70
FEATURES
1
•2 ACCURACY: ±1°C (typical at +25°C)
• PROGRAMMABLE TRIP POINT
• PROGRAMMABLE HYSTERESIS: 5°C/10°C
• OPEN-DRAIN OUTPUTS
• LOW-POWER: 110μA (max)
• WIDE VOLTAGE RANGE: +1.8V to +18V
• OPERATION: –40°C to +150°C
• ANALOG OUT: 10mV/°C
• SC70-6 AND SOT23-6 PACKAGES
APPLICATIONS
• POWER-SUPPLY SYSTEMS
• DC-DC MODULES
• THERMAL MONITORING
• ELECTRONIC PROTECTION SYSTEMS
DESCRIPTION
The TMP300 is a low-power, resistor-programmable,
digital output temperature switch. It allows a threshold
point to be set by adding an external resistor. Two
levels of hysteresis are available. The TMP300 has a
VTEMP analog output that can be used as a testing
point or in temperature-compensation loops.
The TMP300 detects temperature with ±4°C accuracy
(max) over –40°C to +125°C.
With a supply voltage as low as 1.8V and low current
consumption, the TMP300 is ideal for power-sensitive
systems.
Available in two micropackages that have proven
thermal characteristics, this part gives a complete and
simple solution for users who need simple and
reliable thermal management.
V+
TMP300
TSET 1
GND 2
OUT 3
6 V+
5 VTEMP
4 HYSTSET
SC70-6, SOT23-6
VTEMP
TSET
RSET
Proportional
3mA to TA
210kW(1)
RPULL-UP
OUT
TMP300
HYSTSET
NOTE: (1) Thinfilm resistor with approximately 10% accuracy;
however, this accuracy error is trimmed out at the factory.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2007, Texas Instruments Incorporated
TMP300
SBOS335A – JUNE 2005 – REVISED SEPTEMBER 2007
HYSTERESIS
The hysteresis pin has two settings. Grounding
HYSTSET results in 5°C of hysteresis. Connecting it to
VS results in 10°C of hysteresis. Hysteresis error
variation over temperature is shown in Figure 12 and
Figure 13.
5
4
3
2
Maximum
1
0
-1
Average Minimum
-2
-3
-4
-5
-50
-25
0 25 50
Temperature (°C)
75
100 125
Figure 12. 5°C Hysteresis Error vs Temperature
www.ti.com
Bypass capacitors should be used on the supplies as
well as on the RSET and analog out (VTEMP) pins when
in noisy environments, as shown in Figure 14. These
capacitors reduce premature triggering of the
comparator.
5
4
3
2
Maximum
1
0
-1
Average Minimum
-2
-3
-4
-5
-50
-25
0 25 50
Temperature (°C)
75
100 125
Figure 13. 10°C Hysteresis Error vs Temperature
V+
CBYPASS
CBYPASS
VTEMP
TSET
3mA
RSET
TMP300
Proportional
to TA
210kW
HYSTSET
OUT Open-Drain Control
Figure 14. Bypass Capacitors Prevent Early Comparator Toggling Due to Circuit Board Noise
8 Submit Documentation Feedback
Product Folder Link(s): TMP300
Copyright © 2005–2007, Texas Instruments Incorporated
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页数 | 14 页 | ||
下载 | [ TMP300.PDF 数据手册 ] |
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