Low Noise, Micropower
5.0 V Precision Voltage Reference
Enhanced Product ADR293-EP
Rev. A Document Feedback
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FEATURES
6.0 V to 15 V supply range
Supply current: 15 μA maximum
Low noise: 15 μV p-p typical (0.1 Hz to 10 Hz)
High output current: 5 mA
Pin-compatible with the REF02/REF19x
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC
standard)
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
1 assembly/test site
1 fabrication site
Product change notification
Qualification data available on request
APPLICATIONS
Portable instrumentation
Precision reference for 5 V systems
ADC and DAC reference
Solar-powered applications
PIN CONFIGURATION
TOP VIEW
(No t to Scale)
1
2
3
4
A
DR293-EP
V
IN
NC
GND
NC
8
7
6
5
NC
V
OUT
NC
NC
NC = NO CONNECT
0
9356-002
Figure 1. 8-Lead TSSOP (RU-8)
GENERAL DESCRIPTION
The ADR293-EP is a low noise, micropower precision voltage
reference that utilizes an XFET® (eXtra implanted junction FET)
reference circuit. The XFET architecture offers significant
performance improvements over traditional band gap and
buried Zener-based references. Improvements include one
quarter the voltage noise output of band gap references
operating at the same current, very low and ultralinear
temperature drift, low thermal hysteresis, and excellent long-
term stability.
The ADR293-EP is a series voltage reference providing stable
and accurate output voltage from a 6.0 V supply. Quiescent
current is only 15 μA maximum, making this device ideal for
battery powered instrumentation. The temperature coefficient
is 30 ppm/°C maximum over the military temperature range,
and the initial error is only 0.2% at 25°C. Line regulation and
load regulation are typically 70 ppm/V and 30 ppm/mA,
respectively, maintaining the reference’s overall high
performance.
The ADR293-EP is specified over the military temperature
range of –55°C to +125°C. This device is available in an 8-lead
TSSOP package.
Additional applications information is available in the ADR293
data sheet.
ADR293-EP Enhanced Product
Rev. A | Page 2 of 12
TABLE OF CONTENTS
Features........................................................................................... 1
Enhanced Product Features .......................................................... 1
Applications ................................................................................... 1
Pin Configuration.......................................................................... 1
General Des cr ip t io n ...................................................................... 1
Revision History ............................................................................ 2
Specifications ................................................................................. 3
Electrical Specifications............................................................. 3
Absolute Maximum Ratings ......................................................... 5
Thermal Resistance ................................................................... 5
ESD Ca u t io n............................................................................... 5
Typical Performance Characteristics............................................ 6
Outline Dimensions ...................................................................... 9
Ordering Guide.......................................................................... 9
REVISION HISTORY
4/2018—Rev. 0 to Rev. A
Change to Enhanced Product Features Section ...........................1
Changes to Ordering Guide ...........................................................9
9/2010—Revision 0: Initial Version
Enhanced Product ADR293-EP
Rev. A | Page 3 of 12
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
VS = 6.0 V, T A = 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
OUTPUT VOLTAGE VOUT
IOUT = 0 mA
T Grade
4.990
5.000
5.010
V
INITIAL ACCURACY IOUT = 0 mA
T Grade –10 +10 mV
0.20 %
LINE REGULATION ΔVOUT
/ΔVIN 6.0 V to 15 V, IOUT = 0 mA
T Grade 40 150 ppm/V
LOAD REGULATION ΔVOUT
/ΔILOAD VS = 6.0 V, IOUT = 0 mA to 5 mA
T Grade 30 150 ppm/mA
LONG-TERM STABILITY
ΔVOUT
After 1000 hours of operation @ 125°C
50
ppm
VOLTAGE NOISE eN p-p f = 0.1 Hz to 10 Hz 15 μV p-p
VOLTAGE NOISE DENSITY eN f = 1 kHz 640 nV/√Hz
VS = 6.0 V, TA = −25°C to +85°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
TEMPERATURE COEFFICIENT TCVOUT IOUT = 0 mA
T Grade 10 25 ppm/°C
LINE REGULATION
ΔVOUT/ΔVIN
6.0 V to 15 V, IOUT = 0 mA
T Grade 50 200 ppm/V
LOAD REGULATION ΔVOUT/ΔILOAD VS = 6.0 V, IOUT = 0 mA to 5 mA
T Grade 30 200 ppm/mA
ADR293-EP Enhanced Product
Rev. A | Page 4 of 12
VS = 6.0 V, TA = −55°C to +125°C, unless otherwise noted.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
TEMPERATURE COEFFICIENT TCVOUT IOUT = 0 mA
T Grade
10
30
ppm/°C
LINE REGULATION ΔVOUT/ΔVIN 6.0 V to 15 V, IOUT = 0 mA
T Grade 70 250 ppm/V
LOAD REGULATION ΔVOUT/ΔILOAD VS = 6.0 V, 0 mA to 5 mA
T Grade 30 300 ppm/mA
SUPPLY CURRENT IS @ 25°C 11 15 μA
15 20 μA
THERMAL HYSTERESIS VOUT-HYS
T Grade 157 ppm
Enhanced Product ADR293-EP
Rev. A | Page 5 of 12
ABSOLUTE MAXIMUM RATINGS
Table 4.
Parameter Rating
Supply Voltage 18 V
Output Short-Circuit Duration to GND
Indefinite
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −55°C to +125°C
Junction Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
THERMAL RESISTANCE
θJA is specified for worst-case conditions; that is, θJA is specified
for the device in socket testing. In practice, θJA is specified for
the device soldered in a circuit board.
Table 5. Thermal Resistance
Package Type θJA θJC Unit
8-Lead TSSOP (RU-8)
240
43
°C/W
ESD CAUTION
ADR293-EP Enhanced Product
Rev. A | Page 6 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
5.006
4.994
–60 –30 0 30 60 90 120
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
09356-003
5.004
5.002
5.000
4.998
4.996
V
S
= 6V 3 TYPICAL PARTS
Figure 2. VOUT vs. Temperature
14
8
–60 –30 0 30 60 90 120
SUPPLY CURRENT (µA)
TEMPERATURE (°C)
09356-005
13
12
11
10
9
V
S
= 15V
V
S
= 6V
Figure 3. Supply Current vs. Temperature
60
0
–60 –30 0 30 60 90 120
LINE REGULATION (ppm/V)
TEMPERATURE (°C)
09356-006
50
40
30
20
10
V
S
= 6.1V TO 15B
Figure 4. Line Regulation vs. Temperature
80
70
0
–60 –30 0 30 60 90 120
LINE REGULATION (ppm/mA)
TEMPERATURE (°C)
09356-009
50
60
40
30
20
10
V
S
= 6.1V
I
L
= 0 TO 5mA
Figure 5. Load Regulation vs. Temperature
2
1
0
–1
–2
–3
–4
∆V
OUT
FROM NOMIN
A
L (mV)
0.1 1 10
SOURCING LOAD CURRENT (mA)
T
A
= +125°C
T
A
= +25°C
T
A
= –40°C
0
9356-010
Figure 6. ΔVOUT from Nominal vs. Load Current
1k
100
10 100 1k
FREQUENCY (Hz)
09356-011
VOLTAGE NOISE DENSITY (nV/ Hz)
V
IN
= 15V
T
A
= 25°C
Figure 7. Voltage Noise Density vs. Frequency
Enhanced Product ADR293-EP
Rev. A | Page 7 of 12
120
100
80
60
40
20
0
RIPPLE REJECTION (dB)
10 100 1k
FREQUENCY (Hz)
V
S
= 6V
09356-012
Figure 8. Ripple Rejection vs. Frequency
100
10
1
OUTPUT IMPEDANCE (Ω)
10 100 1k 10k
FREQUENCY (Hz)
09356-013
V
S
= 6V
I
L
= 0mA
Figure 9. Output Impedance vs. Frequency
10µV p-p
1s/DIV
09356-014
Figure 10. 0.1 Hz to 10 Hz Noise
50µs/DIV
I
L
= 5mA
2V/DIV
5V/DIV
09356-015
Figure 11. Turn-On Time
50µs/DIV
I
L
= 5mA
2V/DIV
5V/DIV
09356-016
Figure 12. Turn-Off Time
1ms/DIV
I
L
= 5mA
09356-017
Figure 13. Load Transient Response
ADR293-EP Enhanced Product
Rev. A | Page 8 of 12
1ms/DIV
I
I
= 5mA
C
L
= 1nF
09356-018
Figure 14. Load Transient Response
1ms/DIV
I
I
= 5mA
C
L
= 100nF
09356-019
Figure 15. Load Transient Response
18
16
14
12
10
8
6
4
2
0
FREQUENCY IN NUMBER OF UNITS
–200 –160 –120 –80 –40 0 40 80 120 160 200 240
V
OUT
DEVIATION (ppm)
TEMPERATURE
+25°C → –40°C →
+85°C → +25°C
09356-020
Figure 16. Typical Hysteresis for the ADR29x Product
Enhanced Product ADR293-EP
Rev. A | Page 9 of 12
OUTLINE DIMENSIONS
85
4
1
PIN 1
0.65 BSC
SEATING
PLANE
0.15
0.05
0.30
0.19
1.20
MAX
0.20
0.09
8°
0°
6.40 BSC
4.50
4.40
4.30
3.10
3.00
2.90
COPLANARITY
0.10
0.75
0.60
0.45
COMPLIANT TO JEDEC STANDARDS MO-153-AA
Figure 17. 8-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-8)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
Output
Voltage (V)
Initial
Accuracy (%)
Temperature
Coefficient
(ppm/°C max)
Temperature
Range
Package
Description
Package
Option
Ordering
Quantity
ADR293TRU-EP 5.00 0.20 30 −55°C to +125°C 8-Lead TSSOP RU-8 96
ADR293TRU-EP-R7 5.00 0.20 30 −55°C to +125°C 8-Lead TSSOP RU-8 1,000
ADR293TRUZ-EP 5.00 0.20 30 −55°C to +125°C 8-Lead TSSOP RU-8 96
ADR293TRUZ-EP-R7 5.00 0.20 30 −55°C to +125°C 8-Lead TSSOP RU-8 1,000
1 Z = RoHS Compliant Part.
ADR293-EP Enhanced Product
Rev. A | Page 10 of 12
NOTES
Enhanced Product ADR293-EP
Rev. A | Page 11 of 12
NOTES
