a
FEATURES
Voltage Output 5.0 V
6.0 V to 15 V Supply Range
Supply Current 15 A Max
Initial Accuracy 3 mV Max
Temperature Coefficient 8 ppm/ C Max
Low Noise 15 V p–p Typ (0.1 Hz to 10 Hz)
High Output Current 5 mA Min
Temperature Range 40 C to 125 C
REF02/REF19x Pinout
APPLICATIONS
Portable Instrumentation
Precision Reference for 5 V Systems
A/D and D/A Converter Reference
Solar Powered Applications
Loop-Current Powered Instruments
GENERAL DESCRIPTION
Low Noise Micropower
Precision Voltage Reference
ADR293
PIN CONFIGURATIONS
8-Lead Narrow Body SO
(R Suffix)
NC 1
V
IN
2
8 NC
ADR293
7 NC
TOP VIEW
NC 3 (Not to Scale) 6 V
OUT
5 NC
GND 4
NC = NO CONNECT
8-Lead TSSOP
(RU Suffix)
NC 1
V
IN
2
8 NC
ADR293
7 NC
TOP VIEW
NC 3 (Not to Scale) 6 V
OUT
5 NC
The ADR293 is a low noise, micropower precision voltage
reference that utilizes an XFET
™
(eXtra implanted junction
FET) reference circuit. The new XFET architecture offers sig-
nificant performance improvements over traditional bandgap
and Zener-based references. Improvements include: one quarter
the voltage noise output of bandgap references operating at the
same current, very low and ultralinear temperature drift, low
thermal hysteresis and excellent long-term stability.
The ADR293 is a series voltage reference providing stable and
accurate output voltage from a 6.0 V supply. Quiescent current
is only 15
µA
max, making this device ideal for battery powered
instrumentation. Three electrical grades are available offering
initial output accuracy of
±
3 mV,
±
6 mV, and
±
10 mV. Tem-
perature coefficients for the three grades are 8 ppm/°C, 15 ppm/°C
and 25 ppm/°C max. Line regulation and load regulation are typi-
cally 30 ppm/V and 30 ppm/mA, maintaining the reference’s over-
all high performance.
The ADR293 is specified over the extended industrial tempera-
ture range of –40°C to +125°C. This device is available in the
8-lead SOIC, 8-lead TSSOP and the TO-92 package.
GND 4
NC = NO CONNECT
3-Lead TO-92
(T9 Suffix)
PIN 1
V
IN
PIN 2
GND
PIN 3
V
OUT
BOTTOM VIEW
Part Number
ADR290
ADR291
ADR292
ADR293
Nominal Output Voltage (V)
2.048
2.500
4.096
5.000
XFET is a trademark of Analog Devices, Inc.
REV. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
ADR293–SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
(V =
S
6.0 V, T
A
=
25 C unless otherwise noted)
Min
4.997
4.994
4.990
Typ
Max
Units
V
V
V
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm
µV
p-p
nV/√Hz
Parameter
INITIAL ACCURACY
“E” Grade
“F” Grade
“G” Grade
LINE REGULATION
“E/F” Grades
“G” Grade
LOAD REGULATION
“E/F” Grades
“G” Grade
LONG TERM STABILITY
NOISE VOLTAGE
WIDEBAND NOISE DENSITY
Symbol
V
O
Conditions
I
OUT
= 0 mA
5.000 5.003
5.006
5.010
30
40
30
40
0.2
15
640
100
150
100
150
∆V
O
/∆V
IN
6.0 V to 15 V, I
OUT
= 0 mA
∆V
O
/∆I
LOAD
∆V
O
e
N
e
N
S
V
S
= 6.0 V, 0 mA to 5 mA
1000 hrs @ +25°C, V
S
= +15 V
0.1 Hz to 10 Hz
at 1 kHz
ELECTRICAL SPECIFICATIONS
(V =
Parameter
TEMPERATURE COEFFICIENT
“E” Grade
“F” Grade
“G” Grade
LINE REGULATION
“E/F” Grades
“G” Grade
LOAD REGULATION
“E/F” Grades
“G” Grade
Symbol
TCV
O
/°C
6.0 V, T
A
=
25 C
≤
T
A
≤
85 C unless otherwise noted)
Min
Typ
3
5
10
35
50
20
30
Max
8
15
25
150
200
150
200
Units
ppm/°C
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/mA
ppm/mA
Conditions
I
OUT
= 0 mA
∆V
O
/∆V
IN
6.0 V to 15 V, I
OUT
= 0 mA
∆V
O
/∆I
LOAD
V
S
= 6.0 V, 0 mA to 5 mA
ELECTRICAL SPECIFICATIONS
(V =
S
6.0 V, T
A
=
40 C
≤
T
A
≤
125 C unless otherwise noted)
Min
Typ
3
5
10
40
70
20
30
11
15
160
72
157
Max
10
20
30
200
250
200
300
15
20
Units
ppm/°C
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/mA
ppm/mA
µA
µA
ppm
ppm
ppm
Parameter
TEMPERATURE COEFFICIENT
“E” Grade
“F” Grade
“G” Grade
LINE REGULATION
“E/F” Grades
“G” Grade
LOAD REGULATION
“E/F” Grades
“G” Grade
SUPPLY CURRENT
THERMAL HYSTERESIS
Symbol
TCV
O
/°C
Conditions
I
OUT
= 0 mA
∆V
O
/∆V
IN
6.0 V to 15 V, I
OUT
= 0 mA
∆V
O
/∆I
LOAD
V
S
= 6.0 V, 0 mA to 5 mA
@ +25°C
TO-92
SO-8
TSSOP-8
Specifications subject to change without notice.
–2–
REV. 0
ADR293
WAFER TEST LIMITS
(V =
S
6.0 V, T
A
=
Symbol
V
O
∆V
O
/∆V
IN
∆V
O
/∆I
LOAD
25 C unless otherwise noted)
Conditions
I
OUT
= 0 mA
6.0 V < V
IN
< 15 V, I
OUT
= 0 mA
0 mA to 5 mA
No load
Limits
4.990/5.010
150
150
15
Units
V
ppm/V
ppm/mA
µA
Parameter
INITIAL ACCURACY
LINE REGULATION
LOAD REGULATION
SUPPLY CURRENT
NOTES
Electrical tests are performed as wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed
for standard product dice. Consult factory to negotiate specifications based on dice lot qualification through sample lot assembly and testing.
Specifications subject to change without notice.
DICE CHARACTERISTICS
Die Size 0.074 0.052 inch, 3848 sq. mils
(1.88 1.32 mm, 2.48 sq. mm)
Transistor Count: 52
V
IN
1
4
V
OUT(SENSE)
3
V
OUT(FORCE)
GND
2
REV. 0
–3–
ADR293
ABSOLUTE MAXIMUM RATINGS
1
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . Indefinite
Storage Temperature Range
T9, R, RU Package . . . . . . . . . . . . . . . . . 65°C to 150°C
Operating Temperature Range . . . . . . . . . . 40°C to 125°C
Junction Temperature Range
T9, R, RU Package . . . . . . . . . . . . . . . . . 65°C to 125°C
Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . 300°C
NOTE
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Package Type
8-Lead SOIC (R)
3-Lead TO-92 (T9)
8-Lead TSSOP (RU)
1
JA
JC
Units
°C/W
°C/W
°C/W
158
162
240
43
120
43
NOTE
1
θ
JA
is specified for worst case conditions, i.e.,
θ
JA
is specified for device in socket
for PDIP, and
θ
JA
is specified for a device soldered in circuit board for SOIC
packages.
ORDERING GUIDE
Model
ADR293ER, ADR293FR, ADR293GR
ADR293ER-REEL, ADR293FR-REEL, ADR293GR-REEL
ADR293ER-REEL7, ADR293FR-REEL7, ADR293GR-REEL7
ADR293GT9
ADR293GT9-REEL
ADR293GRU-REEL
ADR293GRU-REEL7
ADR293GBC
Temperature Range
40°C to
40°C to
40°C to
40°C to
40°C to
40°C to
40°C to
25°C
125°C
125°C
125°C
125°C
125°C
125°C
125°C
Package Type
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
3-Lead TO-92
3-Lead TO-92
8-Lead TSSOP
8-Lead TSSOP
DICE
Package Options
R-8
R-8
R-8
T9
T9
RU-8
RU-8
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADR293 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4–
REV. 0
Typical Performance Characteristics– ADR293
5.006
V
S
= 6.0V
5.004
3 TYPICAL PARTS
100
V
S
= 6.0V TO 15V
LINE REGULATION – ppm/V
80
I
OUT
= 0mA
OUTPUT VOLTAGE – V
5.002
60
5.000
40
4.998
4.996
20
4.994
50
25
0
25
50
75
100
125
0
50
25
0
25
50
75
100
125
TEMPERATURE – C
TEMPERATURE – C
Figure 1. V
OUT
vs. Temperature
Figure 4. Line Regulation vs. Temperature
16
14
12
100
V
S
= 6.0V TO 9.0V
LINE REGULATION – ppm/V
T
A
= +125 C
T
A
= +25 C
T
A
=
40 C
I
OUT
= 0mA
80
SUPPLY CURRENT – A
10
8
6
4
2
0
60
40
20
0
2
4
6
8
10
INPUT VOLTAGE – V
12
14
16
0
50
25
0
25
50
75
100
125
TEMPERATURE – C
Figure 2. Supply Current vs. Input Voltage
Figure 5. Line Regulation vs. Temperature
16
V
S
= 6.0V
0.7
0.6
DIFFERENTIAL VOLTAGE – V
14
SUPPLY CURRENT – A
0.5
T
A
= +125 C
12
0.4
0.3
0.2
T
A
=
0.1
T
A
= +25 C
10
8
40 C
6
50
25
0
25
50
75
100
125
0
0
0.5
1.0
1.5
2.0
2.5
3.0 3.5
LOAD CURRENT – mA
4.0
4.5
5.0
TEMPERATURE – C
Figure 3. Supply Current vs. Temperature
Figure 6. Minimum Input-Output Voltage Differential vs.
Load Current
REV. 0
–5–
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