ADR225HRZN [ADI]
High Temperature, Low Drift, Micropower 2.5 V Reference; 高温，低漂移，微2.5 V参考
| 型号： | ADR225HRZN |
| 厂家： | 
ADI |
| 描述： | High Temperature, Low Drift, Micropower 2.5 V Reference |
| 文件： | 总12页 (文件大小：217K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
High Temperature, Low Drift,
Micropower 2.5 V Reference
Data Sheet
ADR225
FEATURES
PIN CONFIGURATION
Extreme high temperature operation
−40°C to +210°C, 8-lead FLATPACK
−40°C to +175°C, 8-lead SOIC
Temperature coefficient
NC
1
2
3
4
8
7
6
5
NC
ADR225
TOP VIEW
(Not to Scale)
V
S
NC
NC
OUTPUT
NC
GND
30 ppm/°C, 8-lead FLATPACK
10 ppm/°C, 8-lead SOIC
NOTES
1. NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
High output current: 10 mA
Figure 1.
Low supply current: 50 µA maximum
Initial accuracy: 0.4% ( 10 mV maximum), 8-lead SOIC
Low dropout voltage
Wide supply range: 3.3 V to 16 V
APPLICATIONS
Down-hole drilling and instrumentation
Avionics
Heavy industrial
High temperature environments
GENERAL DESCRIPTION
The ADR225 is a precision 2.5 V band gap voltage reference
specified for a high temperature operation of 175°C and 210°C.
It uses a micropower core topology and laser trimming of highly
stable, thin film resistors to achieve a temperature coefficient of
30 ppm/°C (maximum) up to 175°C and an initial accuracy of
0.4% ( 10 mV maximum). A maximum operating current of
50 µA and a low dropout voltage allow the ADR225 to function
very well in battery-powered equipment.
It is also available in an 8-lead ceramic flat pack (FLATPACK)
with an operating temperature range of −40°C to +210°C. Both
devices are designed for robustness at extreme temperatures
and are qualified for 1000 hours of operation at the maximum
temperature rating.
The ADR225 is a member of a growing series of high temperature
qualified products offered by Analog Devices, Inc. For a complete
selection table of the available high temperature products, see
the high temperature product list and qualification data available at
www.analog.com/hightemp.
The ADR225 voltage reference is offered in an 8-lead SOIC
package with an operating temperature range of −40°C to +175°C.
Rev. A
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rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Technical Support
©2013 Analog Devices, Inc. All rights reserved.
www.analog.com
ADR225
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Predicted Lifetime vs. Operating Temperature.........................4
Thermal Resistance.......................................................................4
ESD Caution...................................................................................4
Typical Performance Characteristics ..............................................5
Theory of Operation .........................................................................8
Basic Voltage Reference Connections ........................................8
Outline Dimensions..........................................................................9
Ordering Guide .............................................................................9
Applications....................................................................................... 1
Pin Configuration............................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics............................................................. 3
Absolute Maximum Ratings............................................................ 4
REVISION HISTORY
9/13—Rev. 0 to Rev. A
Changes to Data Sheet Title and Added Wide Supply Range: 3.3 V
to 16 V to Features Section.............................................................. 1
Changed Supply Voltage from −0.3 V to +15 V to −0.3 V to
+18 V; Table 2.................................................................................... 4
7/13—Revision 0: Initial Version
Rev. A | Page 2 of 12
Data Sheet
ADR225
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VS = 3.3 V, VOUT = 2.5 V, TMIN < TA < TMAX, unless otherwise noted.
Table 1.
8-Lead SOIC
8-Lead FLATPACK
−40°C ≤ TA ≤ +175°C −40°C ≤ TA ≤ +210°C
Parameter
Symbol
Test Conditions/Comments
No load
Min
Typ
30
2
Max
50
Min
Typ
35
5
Max
Unit
µA
SUPPLY CURRENT
INITIAL ACCURACY1
ISY
VO
IOUT = 0 mA
10
mV
TEMPERATURE COEFFICIENT2 TCVOUT
IOUT = 0 mA
10
30
30
ppm/°C
REGULATION
Line Regulation
Load Regulation3
ΔVOUT/ΔVIN
3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA
5
10
40
40
5
10
ppm/V
ppm/mA
ΔVOUT/ΔVLOAD VS = 5.0 V, 0 mA ≤ IOUT ≤ 10 mA
VOLTAGE
Dropout Voltage
Noise Voltage
VS − VOUT
eN
ILOAD = 10 mA
0.1 Hz to 10 Hz
1.00
1.00
25
V
25
µV p-p
1 For proper operation, a 1 µF capacitor is required between the OUTPUT pin and the GND pin of the device.
2 TCVOUT is defined as the ratio of output change with temperature variation to the specified temperature range expressed in ppm/°C.
TCVOUT = (VMAX − VMIN)/VOUT(TMAX − TMIN
3 Load regulation specification includes the effect of self-heating.
)
Rev. A | Page 3 of 12
ADR225
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 2.
100k
10k
1k
Parameter
Rating
Supply Voltage
−0.3 V to +18 V
OUTPUT to GND
−0.3 V to VS + 0.3 V
−65°C to +150°C
Storage Temperature Range
Operating Temperature Range
8-Lead SOIC
−40°C to +175°C
−40°C to +210°C
100
10
8-Lead FLATPACK
Junction Temperature Range
8-Lead SOIC
8-Lead FLATPACK
−40°C to +200°C
−40°C to +245°C
300°C
1
120
Lead Temperature (Soldering 60 sec)
130
140
150
160
170
180
190
200
210
OPERATING TEMPERATURE (°C)
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Figure 2. Predicted Lifetime vs. Operating Temperature
THERMAL RESISTANCE
θJA is specified for worst-case conditions; that is, θJA is specified
for the device soldered in the circuit board.
Table 3.
Package Type
θJA
θJC
43
15
Unit
°C/W
°C/W
PREDICTED LIFETIME vs. OPERATING
TEMPERATURE
8-Lead SOIC
8-Lead FLATPACK
121
100
Comprehensive reliability testing is performed on the ADR225.
Product lifetimes at extended operating temperature are obtained
using high temperature operating life (HTOL). Lifetimes are
predicted from the Arrhenius equation, taking into account
potential design and manufacturing failure mechanism
assumptions. HTOL is performed to JEDEC JESD22-A108. A
minimum of three wafer fab and assembly lots are processed
through HTOL at the maximum operating temperature.
Comprehensive reliability testing is performed on all Analog
Devices, Inc., high temperature (HT) products.
ESD CAUTION
Rev. A | Page 4 of 12
Data Sheet
ADR225
TYPICAL PERFORMANCE CHARACTERISTICS
VS = 3.3 V, VOUT = 2.5 V, TMIN ≤ TA ≤ TMAX for 8-lead SOIC package, unless otherwise noted.
50
45
40
35
30
25
20
15
10
5
2.510
2.505
2.500
2.495
2.490
0
–40 –25 –10
5
20 35 50 65 80 95 110 125 140 155 170
TEMPERATURE (°C)
–40 –25 –10
5
20 35 50 65 80 95 110 125 140 155 170
TEMPERATURE (°C)
Figure 6. Supply Current (ISY) vs. Temperature
Figure 3. Output Voltage (VOUT) vs. Temperature
18
16
14
12
10
8
0
–5
–10
–15
–20
–25
–30
6
4
2
0
–
40
–25
–10
5
20 35 50 65 80 95 110 125 140 155 170
TEMPERATURE (°C)
–30 –24 –18 –12 –6
TCV
0
6
12
18
24
30
(ppm/°C)
OUT
Figure 7. Load Regulation vs. Temperature (ILOAD = 0 mA to 10 mA)
Figure 4. TCVOUT Distribution, −40°C to +175°C
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
–10
–
–0.5 –0.4 –0.3 –0.2 –0.1
0
0.1 0.2 0.3 0.4 0.5 0.6
40
–25
–10
5
20 35 50 65 80 95 110 125 140 155 170
TEMPERATURE (°C)
OUTPUT VOLTAGE ACCURACY (%)
Figure 8. Line Regulation vs. Temperature
Figure 5. Output Voltage Accuracy at 175°C
Rev. A | Page 5 of 12
ADR225
Data Sheet
1.0
–40°C
+25°C
V
= 5V/DIV
OUT
= 10kΩ
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
IN
IN
10V
5V
+175°C
C
R
= C
= 1µF
L
1
0V
V
= 200mV/DIV
OUT
2
B
A CH1
7.3V
CH1 5V
CH2 200mV
M200µs
W
0
2
4
6
8
10
12
LOAD CURRENT (mA)
Figure 9. Dropout Voltage vs. Load Current (ILOAD
)
Figure 12. Line Transient Response (see Figure 17)
2.508
2.506
2.504
2.502
2.500
2.498
2.496
LOAD CURRENT
UNIT 1
UNIT 3
UNIT 5
0mA
10mA
1
V
C
= 20mV/DIV
= 1µF
OUT
OUT
2
CH1 1V
CH2 20mV
M100µs
A CH1
1.32V
40
55
70
85
100 115 130 145 160 175
TEMPERATURE (°C)
Figure 13. Load Transient Response
Figure 10. Thermal Hysteresis, ILOAD = 0 mA
0
V
= 2V/DIV
OUT
IN
–20
C
= 1µF
NO LOAD
–40
–60
–80
V
= 1V/DIV
OUT
1
2
–100
–120
B
A CH1
4.4V
CH1 2V
CH2 1V
M100µs
W
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 11. Power-On Response (see Figure 17)
Figure 14. Power Supply Rejection Ratio (PSRR) vs. Frequency, CLOAD = 1 µF
Rev. A | Page 6 of 12
Data Sheet
ADR225
10.24
5.12
2.56
1.28
0.64
0.32
0.16
0.08
0.04
0.02
0.01
1
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 15. Output Impedance (ZOUT) vs. Frequency, CIN = COUT = 1 µF
Rev. A | Page 7 of 12
ADR225
Data Sheet
THEORY OF OPERATION
1
2
3
4
8
7
6
5
BASIC VOLTAGE REFERENCE CONNECTIONS
NC
NC
V
S
NC
The circuit shown in Figure 16 is the basic configuration for the
ADR225. Note that a 10 µF and 0.1 µF bypass network on the input
and at least a 1 µF bypass capacitor on the output are required for
proper device operation. It is recommended that no connections
be made to Pin 1, Pin 3, Pin 5, Pin 7, and Pin 8.
ADR225
10µF
0.1µF
OUTPUT
NC
+
+
1µF
TANT
1µF
NC
NC = NO CONNECT.
Figure 16. Basic Voltage Reference Connections
V+
+5V
VCC
+5V
U1
ADR225
U2A
AD8634
R2
2.5kΩ
+V
S
V
S
+IN A
–IN A
+5V
OUTPUT
+
C2
0.1µF
C1
10µF
R3
2.5kΩ
+
C3
1µF
C4
0.1µF
U3
GND
AD8229
+IN
–IN
–5V
V
OUT
RTD
V–
R1
2.5kΩ
–5V
–V
S
Figure 17. Typical High Temperature Resistance Temperature Detector (RTD) Signal Conditioning Circuit
Rev. A | Page 8 of 12
Data Sheet
ADR225
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
8
1
5
4
6.20 (0.2441)
5.80 (0.2284)
4.00 (0.1574)
3.80 (0.1497)
0.50 (0.0196)
0.25 (0.0099)
1.27 (0.0500)
BSC
45°
1.75 (0.0688)
1.35 (0.0532)
0.25 (0.0098)
0.10 (0.0040)
8°
0°
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
1.27 (0.0500)
0.40 (0.0157)
0.25 (0.0098)
0.17 (0.0067)
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MS-012-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 18. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
1.00
0.260
0.255 SQ
0.250
0.195
0.190 SQ
0.053
0.050
0.047
0.185
1
4
8
5
0.035
TYP
0.019
0.017
0.015
0.05 TYP
0.155
0.150
0.145
0.054
0.044
0.034
TOP VIEW
END VIEW
BOTTOM VIEW
0.024
0.012 R
TYP
IDEX
MARK
0.091
0.083
0.075
0.006
0.005
0.004
0.007
MIN
SIDE VIEW
0.026 MIN
0.175
Figure 19. 8-Lead Ceramic Flat Package [FLATPACK]
(F-8-2)
Dimensions shown in inches
ORDERING GUIDE
Model1
Temperature Range
−40°C to +175°C
−40°C to +210°C
Package Description
Package Option
ADR225HRZN
ADR225HFZ
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Ceramic Flat Package [FLATPACK]
R-8
F-8-2
1 Z = RoHS Compliant Part.
Rev. A | Page 9 of 12
ADR225
NOTES
Data Sheet
Rev. A | Page 10 of 12
Data Sheet
NOTES
ADR225
Rev. A | Page 11 of 12
ADR225
NOTES
Data Sheet
©2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D11525-0-9/13(A)
Rev. A | Page 12 of 12
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