Analog Devices AD883B, AD22100ST, AD22100SR, AD22100KT, AD22100KR Datasheet
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Voltage Output Temperature Sensor
a
FEATURES
200°C Temperature Span
Accuracy Better than 62% of Full Scale
Linearity Better than 61% of Full Scale
Temperature Coefficient of 22.5 mV/8C
Output Proportional to Temperature 3 V+
Single Supply Operation
Reverse Voltage Protection
Minimal Self Heating
High Level, Low Impedance Output
APPLICATIONS
HVAC Systems
System Temperature Compensation
Board Level Temperature Sensing
Electronic Thermostats
MARKETS
Industrial Process Control
Instrumentation
Automotive
with Signal Conditioning
AD22100*
SIMPLIFIED BLOCK DIAGRAM
V+
Ι
R
T
V
OUT
GENERAL DESCRIPTION
The AD22100 is a monolithic temperature sensor with on-chip
signal conditioning. It can be operated over the temperature
range –50°C to +150°C, making it ideal for use in numerous
HVAC, instrumentation and automotive applications.
The signal conditioning eliminates the need for any trimming,
buffering or linearization circuitry, greatly simplifying the system
design and reducing the overall system cost.
The output voltage is proportional to the temperature times the
supply voltage (ratiometric). The output swings from 0.25V at
–50°C to +4.75 V at +150°C using a single +5.0V supply.
Due to its ratiometric nature, the AD22100 offers a cost effective solution when interfacing to an analog-to-digital converter.
This is accomplished by using the ADC’s +5V power supply as
a reference to both the ADC and the AD22100 (See Figure 1),
eliminating the need for and cost of a precision reference.
*
Protected by U.S. Patent Nos. 5030849 and 5243319
.
AD22100
–50°C TO +150°C
+5V
REFERENCE
SIGNAL OUTPUT
DIRECT TO ADC
V
O
1kΩ
Figure 1. Application Circuit
0.1µF
INPUT
ANALOG TO
DIGITAL
CONVERTER
REV. B
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.
© Analog Devices, Inc., 1994
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
AD22100
AD22100–SPECIFICATIONS
(TA = +25°C and V+ = +4 V to +6 V unless otherwise noted)
AD22100K AD22100A AD22100S
Parameter Min Typ Max Min Typ Max Min Typ Max Units
TRANSFER FUNCTION V
= (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA]V
OUT
TEMPERATURE COEFFICIENT (V+/5 V) × 22.5 mV/°C
TOTAL ERROR
Initial Error
T
= +25°C ±0.5 ±2.0 ±1.0 ±2.0 ±1.0 ±2.0 °C
A
Error over Temperature
T
A = TMIN
T
A = TMAX
±0.75 ±2.0 ±2.0 ±3.7 ±3.0 ±4.0 °C
±0.75 ±2.0 ±2.0 ±3.0 ±3.0 ±4.0 °C
Nonlinearity
TA = T
MIN to TMAX
0.5 0.5 1.0 % FS
OUTPUT CHARACTERISTICS
Nominal Output Voltage
V+ = 5.0 V, T
V+ = 5.0 V, T
V+ = 5.0 V, T
V+ = 5.0 V, T
V+ = 5.0 V, T
= 0°C 1.375 V
A
= +100°C 3.625 V
A
= –40°C 0.475 V
A
= +85°C 3.288 V
A
= –50°C 0.250 V
A
V+ = 5.0 V, TA = +150°C 4.750 V
POWER SUPPLY
Operating Voltage +4.0 +5.0 +6.0 +4.0 +5.0 +6.0 +4.0 +5.0 +6.0 V
Quiescent Current 500 650 500 650 500 650 µA
TEMPERATURE RANGE
Guaranteed Temperature Range 0 +100 –40 +85 –50 +150 °C
Operating Temperature Range –50 +150 –50 +150 –50 +150 °C
1
PACKAGE TO-92 TO-92 TO-92
SOIC SOIC SOIC
Specifications subject to change without notice.
CHIP SPECIFICATIONS
(TA = +25°C and V+ = +5.0 V unless otherwise noted)
Parameter Min Typ Max Units
TRANSFER FUNCTION V
= (V+/5 V) × [1.375 + 22.5 mV/°C × TA]V
OUT
TEMPERATURE COEFFICIENT (V+/5V) × 22.5 mV/°C
OUTPUT CHARACTERISTICS
Error
T
= +25°C ±0.5 ±2.0 °C
A
Nominal Output Voltage
TA = +25°C 1.938 V
POWER SUPPLY
Operating Voltage +4.0 +5.0 +6.0 V
Quiescent Current 500 650 µA
TEMPERATURE RANGE
Guaranteed Temperature Range 25 °C
Operating Temperature Range –50 +150 °C
NOTES
1
FS (Full Scale) is defined as that of the operating temperature range, –50°C to +150°C. The listed max specification limit applies to the guaranteed temperature
range. For example, the AD22100K has a nonlinearity of (0.5%) × (200°C) = 1 °C over the guaranteed temperature range of 0°C to +100°C.
Specifications subject to change without notice.
–2–
–2–
REV. B
REV. B
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