Analog Devices AD883B, AD22100ST, AD22100SR, AD22100KT, AD22100KR Datasheet

a		Voltage Output Temperature Sensor
		with Signal Conditioning
		AD22100*

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

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 0.25 V at –50°C to +4.75 V at +150°C using a single +5.0 V 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 +5 V 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.

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.

SIMPLIFIED BLOCK DIAGRAM

V+

Ι

VOUT

RT

	+5V
	REFERENCE
	ANALOG TO
	DIGITAL
AD22100	CONVERTER
	SIGNAL OUTPUT
	DIRECT TO ADC
	VO
	INPUT
	1kΩ
	0.1µF
–50°C TO +150°C

Figure 1. Application Circuit

© Analog Devices, Inc., 1994

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: [phone] Fax: [phone]

AD22100100 –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			VOUT = (V+/5 V) × [1.375 V + (22.5 mV/°C) × TA]							V
TEMPERATURE COEFFICIENT					(V+/5 V) × 22.5					mV/°C
TOTAL ERROR
Initial Error
TA = +25°C		±0.5	±2.0		±1.0	±2.0		±1.0	±2.0	°C
Error over Temperature		±0.75	±2.0		±2.0	±3.7		±3.0	±4.0	°C
TA = TMIN
TA = TMAX		±0.75	±2.0		±2.0	±3.0		±3.0	±4.0	°C
Nonlinearity										% FS1
TA = TMIN to TMAX			0.5			0.5			1.0
OUTPUT CHARACTERISTICS
Nominal Output Voltage
V+ = 5.0 V, TA = 0°C		1.375								V
V+ = 5.0 V, TA = +100°C		3.625								V
V+ = 5.0 V, TA = –40°C					0.475					V
V+ = 5.0 V, TA = +85°C					3.288					V
V+ = 5.0 V, TA = –50°C								0.250		V
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										°C
Guaranteed Temperature Range	0		+100	–40		+85	–50		+150
Operating Temperature Range	–50		+150	–50		+150	–50		+150	°C
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	VOUT = (V+/5 V) × [1.375 + 22.5 mV/°C × TA]		V
TEMPERATURE COEFFICIENT		(V+/5 V) × 22.5		mV/°C
OUTPUT CHARACTERISTICS
Error
TA = +25°C		±0.5	±2.0	°C
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				°C
Guaranteed Temperature Range		25
Operating Temperature Range	–50		+150	°C

NOTES

1FS (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.

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REV. B