TMP01GBC AD [Analog Devices], TMP01GBC Datasheet

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TMP01GBC

Manufacturer Part Number
TMP01GBC
Description
Low Power, Programmable Temperature Controller
Manufacturer
AD [Analog Devices]
Datasheet
a
REV. C
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
GENERAL DESCRIPTION
The TMP01 is a temperature sensor which generates a voltage
output proportional to absolute temperature and a control signal
from one of two outputs when the device is either above or
below a specific temperature range. Both the high/low tempera-
ture trip points and hysteresis (overshoot) band are determined
by user-selected external resistors. For high volume production,
these resistors are available on-board.
The TMP01 consists of a bandgap voltage reference combined
with a pair of matched comparators. The reference provides
both a constant 2.5 V output and a voltage proportional to abso-
lute temperature (VPTAT) which has a precise temperature co-
efficient of 5 mV/K and is 1.49 V (nominal) at +25 C. The
comparators compare VPTAT with the externally set tempera-
ture trip points and generate an open-collector output signal
when one of their respective thresholds has been exceeded.
*Protected by U.S. Patent No. 5,195,827.
FEATURES
–55 C to +125 C (–67 F to +257 F) Operation
Temperature-Proportional Voltage Output
User Programmable Temperature Trip Points
User Programmable Hysteresis
20 mA Open Collector Trip Point Outputs
TTL/CMOS Compatible
Single-Supply Operation (4.5 V to 13.2 V)
Low Cost 8-Pin DIP and SO Packages
APPLICATIONS
Over/Under Temperature Sensor and Alarm
Board Level Temperature Sensing
Temperature Controllers
Electronic Thermostats
Thermal Protection
HVAC Systems
Industrial Process Control
Remote Sensors
1.0 C Accuracy Over Temperature (typ)
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Hysteresis is also programmed by the external resistor chain and
is determined by the total current drawn out of the 2.5 V refer-
ence. This current is mirrored and used to generate a hysteresis
offset voltage of the appropriate polarity after a comparator has
been tripped. The comparators are connected in parallel, which
guarantees that there is no hysteresis overlap and eliminates
erratic transitions between adjacent trip zones.
The TMP01 utilizes proprietary thin-film resistors in conjunc-
tion with production laser trimming to maintain a temperature
accuracy of 1 C (typ) over the rated temperature range, with
excellent linearity. The open-collector outputs are capable of
sinking 20 mA, enabling the TMP01 to drive control relays di-
rectly. Operating from a +5 V supply, quiescent current is only
500 A (max).
The TMP01 is available in the low cost 8-pin epoxy mini-DIP
and SO (small outline) packages, and in die form.
R2
R1
R3
Low Power, Programmable
FUNCTIONAL BLOCK DIAGRAM
VREF
HIGH
LOW
GND
SET
SET
Temperature Controller
1
2
3
4
2.5V
HYSTERESIS
GENERATOR
TEMPERATURE
COMPARATOR
REFERENCE
SENSOR &
VOLTAGE
WINDOW
TMP01
© Analog Devices, Inc., 1995
SENSOR
TMP01*
8
7
6
5
Fax: 617/326-8703
V+
UNDER
OVER
VPTAT

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TMP01GBC Summary of contents

Page 1

FEATURES – +125 C (– +257 F) Operation 1.0 C Accuracy Over Temperature (typ) Temperature-Proportional Voltage Output User Programmable Temperature Trip Points User Programmable Hysteresis 20 mA Open Collector Trip Point Outputs TTL/CMOS Compatible Single-Supply ...

Page 2

TMP01EP/FP, TMP01ES/FS–SPECIFICATIONS ( GND = O V, – +85 C unless otherwise noted) A Parameter Symbol INPUTS SET HIGH, SET LOW Offset Voltage V Offset Voltage Drift TCV Input Bias Current, “E” I Input Bias ...

Page 3

TMP01FJ–SPECIFICATIONS Parameter INPUTS SET HIGH, SET LOW Offset Voltage Offset Voltage Drift Input Bias Current, “F” 1 OUTPUT VPTAT Output Voltage Scale Factor Temperature Accuracy, “F” Temperature Accuracy, “F” Temperature Accuracy, “F” Temperature Accuracy, “F” Repeatability Error Long Term Drift ...

Page 4

TMP01 WAFER TEST LIMITS (V = +5.0 V, GND = Parameter Symbol INPUTS SET HIGH, SET LOW Input Bias Current I OUTPUT VPTAT Temperature Accuracy OUTPUT VREF Nominal Value VREF Line Regulation Load Regulation OPEN-COLLECTOR OUTPUTS ...

Page 5

... Plastic DIP TMP01ES XIND SOIC TMP01FS XIND SOIC 2 TMP01FJ XIND TO-99 Can TMP01GBC +25 C Die NOTES 1 XIND = – + Consult factory for availability of MIL/883 version in TO-99 can. REV. C GENERAL DESCRIPTION The TMP01 is a very linear voltage-output temperature sensor, with a window comparator that can be programmed by the user to activate one of two open-collector outputs when a predeter- mined temperature setpoint voltage has been exceeded ...

Page 6

TMP01 Temperature Hysteresis The temperature hysteresis is the number of degrees beyond the original setpoint temperature that must be sensed by the TMP01 before the setpoint comparator will be reset and the output dis- abled. Figure 2 shows the hysteresis ...

Page 7

Understanding Error Sources The accuracy of the VPTAT sensor output is well characterized and specified, however preserving this accuracy in a heating or cooling control system requires some attention to minimizing the various potential error sources. The internal sources of ...

Page 8

TMP01 +2.0 +1.5 +1.0 +0.5 0 –0.5 –1.0 –1.5 –3.0 –75 –50 – TEMPERATURE – C Figure 7. VPTAT Accuracy vs. Temperature 2.508 2.506 2.504 2.502 2.500 2.498 2.496 –75 –50 – TEMPERATURE – C Figure ...

Page 9

OFFSET – mV Figure 13. Comparator Input Offset Distribution APPLICATIONS INFORMATION Self-Heating Effects In some applications the user should consider the effects of self- heating due ...

Page 10

TMP01 Switching Loads With The Open-Collector Outputs In many temperature sensing and control applications some type of switching is required. Whether turn on a heater when the temperature goes below a minimum value or to turn off ...

Page 11

The last class of high power devices discussed here are Thyris- tors, which includes SCRs and Triacs. Triacs are a useful alter- native to relays for switching ac line voltages. The 2N6073A shown in Figure 15e is rated to handle ...

Page 12

TMP01 Buffering the Temperature Output Pin The VPTAT sensor output is a low impedance dc output volt- age with a 5 mV/K temperature coefficient, and is useful in a number of measurement and control applications. In many ap- plications, this ...

Page 13

Current Loop Another, very common method of transmitting a signal over long distances is to use a 4 mA-20 mA Loop, as shown in Fig- ure 19. An advantage of using a 4 mA-20 mA loop is ...

Page 14

TMP01 OP290 TEMPERATURE VREF VPTAT SENSOR & 1 VOLTAGE REFERENCE WINDOW COMPARATOR HYSTERESIS GENERATOR TMP01 Isolation Amplifier In many industrial applications the sensor is located in an envi- ronment that needs to be electrically ...

Page 15

Translating useful circuit is shown in Figure 23 that translates the VPTAT output voltage, which is calibrated in Kelvins, into an output that can be read directly in degrees Celsius on a voltmeter ...

Page 16

TMP01 0.2440 (6.20) 0.2284 (5.80) 0.0098 (0.25) 0.0040 (0.10) 0.335 (8.51) 0.305 (7.75) 0.370 (9.40) 0.335 (8.51) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Pin Epoxy DIP 8 5 0.280 (7.11) 0.240 (6.10 0.070 (1.77) 0.045 (1.15) ...

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