SPX385-5.0
5V Micropower Voltage Reference
FEATURES
■
Trimmed Bandgap .......................................... 1%
■
Wide Operating Current ............... 50µA to 20mA
■
Extended Temperature Range ... -40°C to +85°C
■
Dynamic Impedance .............................. 1Ω max
■
Offered in Small SOT-23, TO-92, NSOIC, and
SOT-89
■
Low Cost Solution
APPLICATIONS
■
Battery Operated Equipment
■
Adjustable Supplies
■
Switching Power Supplies
■
Error Amplifiers
■
Single Supply Amplifier
N/C
SPX385
3 Pin SOT-23
Cathode
Anode
NC
1
NC
2
NC
3
Anode
4
8
Cathode
SPX385
8 Pin nSOIC
7
NC
6
NC
5
NC
Now Available in Lead Free Packaging
■
Monitors / VCR / TV
■
Personal Computers
■
Power use meter
DESCRIPTION
The SPX385-5.0 is a micropower 2-terminal band-gap voltage reference with a very wide
operating current range from 50µA to 20mA that provides a stable voltage.
The SPX385-5.0 is available in SOT-23, TO-92, NSOIC, and SOT-89 packages with an
operating temperature range of -40°C to 85°C. A 1.2 and 2.5 volt device are also available -
SPX385-1.2, SPX385-2.5.
BLOCK DIAGRAM
Cathode (K)
1.5M
+
-
500k
1.25V
Anode (A)
Figure 1: Block Diagram
Date: 2/11/06
SPX385-5.0 Micropower Voltage Reference
© Copyright 2005 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification
is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Reverse Current (I
KA
) ............................................................. 30mA
Forward Current (I
AK
) ............................................................. 10mA
Operating Temperature Range (T
A
) ............................ -40 to +85°C
Junction Temperature (T
J
) ..................................................... 150°C
Storage Temperature (T
STG
) ....................................... - 65 to 150°C
Lead Temperature (Soldering 10 sec.), T
L
............................. 300°C
I
IN
= 100µA, T
A
= 25°C, unless otherwise specified.
The
♦
denotes the specifications which apply over the full operating
temperature range.
ELECTRICAL CHARACTERISTICS
PARAMETER
Reference Voltage
Dynamic Output
Impedance
Reference Voltage
Change with I
R
.
Temperature Coefficient
Minimum Operating Current
Output Wideband Noise
Long Term Stability
Operating Temperature
MIN.
4.90
4.95
TYP.
5.00
5.00
0.6
10
30
MAX
5.10
5.05
1.0
20
50
50
♦
UNIT
V
Ω
mV
ppm/°C
µA
µVrms
ppm
°C
CONDITIONS
2%
1%
F = 20Hz
I
R
= 100µA
20µA
≤
I
R
≤
20mA
Note 1
♦
♦
♦
♦
♦
♦
♦
30
120
60
-40
10Hz
≤
f
≤
10kHz
T=1000Hr;
T
A
= 25°C
±0.1°C
+85
Note 1. Three-point measurement guarantees the error band over the specified temperature range.
*CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)
ppm
0
%
0
mV
0
∆V
KA
TC in mV/°C =
∆T
∆V
KA
(mV)
∆T
A
-10
5000
0.5
TC in % /°C =
(
∆V
KA
∆V
KA
at 25°C
∆T
A
)
x 100
0
15
30
45
60
75
90
105
TC in ppm/°C =
(
∆V
KA
∆V
KA
at 25°C
∆T
A
)
x 10
6
Junction Temperature (°C)
0.07 mV/°C
0.003 %/°C
27 ppm/°C
Figure 2. V
KA
vs. Temperature
Date: 2/11/06
SPX385-5.0 Micropower Voltage Reference
© Copyright 2005 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
V
KA
9V
200k
I
K
5.0V
SPX385-5.0
Figure 1. Improving Regulation of Adjustable Regula-
tors
* I
OUT
= 2.5V
R2
30V
SPX385-5.0
Figure 2. Micropower Reference from 9V Battery
I
Q
V
IN
= 15V
500k
R1
68k
C1
150pF
2
–
7
6
7
+
3
LM4250C
-
8
2
4
6
10V
LM312
3
22M
150pF
500k
+
4
SPX385-5.0
500k
I
OUT
*
1.5V to 27V
R2
I
Q
≅
30µA Standby Current
Figure 3. Precision 1µA to 1mA Current Source
Figure 4: Precision Micropower 10V Reference
Date: 2/11/06
SPX385-5.0 Micropower Voltage Reference
© Copyright 2005 Sipex Corporation
3
PACKAGE: 3 PIN SOT-23
D
b
3
SIDE VIEW
E1
E
A
A2
Seating
Plane
A1
1
2
(L1)
e
e1
TOP VIEW
FRONT VIEW
Gauge Plane
L2
ø
L
Seating
Plane
c
3 Pin SOT-23
SYMBOL
JEDEC TO-236
Variation AB
Dimensions in Inches
Conversion Factor:
1 Inch = 25.40 mm
MIN
0.012
0.003
0.110
0.083
0.047
NOM
-
-
0.114
-
0.051
0.038 BSC
0.075 BSC
0.020
0.021 REF
0.010 BSC
-
-
-
0.037
MAX
0.020
0.008
0.120
0.104
0.055
Dimensions in Millimeters:
Controlling Dimension
MIN
0.30
0.08
2.80
2.10
1.20
NOM
MAX
-
0.50
-
0.20
2.90
3.04
-
2.64
1.30
1.40
0.95 BSC
1.90 BSC
0.50
0.60
0.54 REF
0.25 BSC
-
8º
-
1.12
-
0.10
0.95
1.02
Signoff Date/Rev:
b
c
D
E
E1
e
e1
L
L1
L2
Ø
A
A1
A2
0.40
0.016
0.024
0º
0.89
0.01
0.88
SIPEX Pkg
0º
0.035
0.000
0.035
8º
0.044
0.004
0.040
JL Oct25-05 / Rev A
Date: 2/11/06
SPX385-5.0 Micropower Voltage Reference
© Copyright 2005 Sipex Corporation
4
PACKAGE: 8 PIN -SOIC
D
D/2
SIDE VIEW
8
7
6
5
E1/2
E1
E/2
E
A
A1
A2
Seating Plane
1
2
3
4
(L1)
Pin1 Designator
to be within this
INDEX AREA
(D/2 x E1/2)
e
TOP VIEW
b
FRONT VIEW
h
Gauge Plane
L2
ø
L
h
ø1
ø2
R1
R
Seating
Plane
ø1
c
8 Pin NSOIC
SYMBOL
JEDEC MS-012
Variation AA
Dimensions in Inches
Conversion Factor:
1 Inch = 25.40 mm
Dimensions in Millimeters:
Controlling Dimension
MIN
NOM
-
-
-
-
-
6.00 BSC
3.90 BSC
1.27 BSC
MAX
1.75
0.25
1.65
0.51
0.25
MIN
0.053
0.004
0.049
0.012
0.007
NOM
MAX
A
A1
A2
b
c
E
E1
e
h
L
L1
L2
R
R1
ø
ø1
ø2
D
1.35
0.10
1.25
0.31
0.17
-
1.04 REF
0.25 BSC
0.07
-
0.07
-
0º
-
5º
-
0º
-
4.90 BSC
SIPEX Pkg Signoff Date/Rev:
0.25
0.40
0.50
1.27
0.010
0.016
-
-
8º
15º
-
0.003
0.003
0º
5º
0º
-
0.069
-
0.010
-
0.065
-
0.020
-
0.010
0.236 BSC
0.154 BSC
0.050 BSC
-
0.020
-
0.050
0.041 REF
0.010 BSC
-
-
-
-
-
8º
-
15º
-
-
0.193 BSC
JL Aug16-05 / Rev A
Date: 2/11/06
SPX385-5.0 Micropower Voltage Reference
© Copyright 2005 Sipex Corporation
5
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