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®
SPX1004
1.2V / 2.5V Micropower Voltage Reference
FEATURES
1
■ Initial Voltage Tolerance:
SPX1004-1.2 = ±4mV
SPX1004-2.5 = ±20mV
■ Low Dynamic Impedance
0.6 Ω Max.
■ Low Operating Current:
SPX1004-1.2 = ±10µA
SPX1004-2.5 = ±20µA
■ Wide Operating Current Range
10µA to 20mA
■ Direct Replacement for LT1004,
LM1004 and AS1004
The SPX1004 is a 2-terminal bandgap precision voltage reference that provides a stable
fixed output voltage of 1.2V and 2.5V with a tolerance of ±4mV for SPX1004-1.2 and ±20mV
for SPX1004-2.5. Design, process and precision on chip trimming yield a very low temperature coefficient of 25 ppm/°C.
The SPX1004 can be used as a pin-to-pin replacement for the LT1004, LM1004 or AS1004.
The SPX1004 is available in SOT-89, SOIC-8 and TO-92 packages over the operating
temperature range of 0°C to 70°C.
N/C
N/C
N/C
ANODE
2
3
4
SPX1004
8 Pin nSOIC
Now Available in Lead Free Packaging
APPLICATIONS
■ A/D and D/A Reference
■ Reference for 5V Systems
■ Digital Voltmeter
■ Power Supply Monitor
DESCRIPTION
BLOCK DIAGRAMS
CATHODE
8
N/C
7
CATHODE
6
5
ANODE
Cathode (K)
500k
+
-
1.235V
Anode (A)
Figure 1a. SPX1004-1.2 Block Diagram Figure 1b. SPX1004-2.5 Block Diagram
Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
500k
Cathode (K)
+
-
1.250V
Anode (A)
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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.
Forward Current (IAK).....................................................10mA
Reverse Current (I
Lead Temperature (soldering, 10 seconds).................300°C
Storage Temperature Range.......................-65°C to +150°C
Junction Temperature..................................................150°C
).....................................................30mA
KA
Continuous Power Dissipation (P
TO-92.........................................................775mW
)
D
SOIC-8.......................................................750mW
SOT-89.....................................................1000mW
TYPICAL THERMAL RESISTANCES
PACKAGE 0
JA
TO-92 160°C/W 80°C/W 6.3 mW/°C
0
JA
TYPICAL
DERATING
SOIC-8 175°C/W 45°C/W 5.7mW/°C
SOT-89 110°C/W 8°C/W 9.1mW/°C
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over full junction tepmerature range (0°C to 70°C). Ambient tepmerature must be
derated based on power dissipation and package thermal characteristics.
SPX1004-1.2V SPX1004-2.5V
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Reverse breakdown IZ=100µA, TJ=25°C 1.231 1.235 1.239 2.480 2.500 2.520 V
0°C≤TA≤70°C 1.225 1.235 1.245 2.470 2.500 2.530
Ave Temp. Coeff. I
Min Operating Current 4 10 12 20 µA
Reverse Breakdown I
Votlage Change over temperature 0.5 1.5 0.5 1.5
with Current 1mA≤IZ≤20mA 6.5 10 6.5 10
Reverse Dynamic IZ=100µA, f=25Hz 0.2 0.6 0.8 0.9 Ω
Impedance over temperature 1 1.5 1.5
Wide Band Noise IZ=100µA, 10Hz≤f≤10kHz 60 120 µV
Long Term Stability IZ=100µA, TA=25°C±0.1°C2060ppm/
Operating Temp Range 0 70 0 70 °C
≤20mA 20 60 ppm/
min≤IZ
≤1mA 0.5 1 0.5 1 mV
min≤IZ
over temperature 6.5 20 6.5 20
°C
kHr
mV
%
ppm
000
˘V
(mV)
V
K
-10
0.55000
0153045607590105
Junction Temperature (¡C)
0.07 mV/¡ C
0.003 %/¡C
27 ppm/¡C
Figure 2. V
Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
vs Temperature for 2.5V Version
REF
TC in mV/ ¡C =
TC in%/¡C =
TC in ppm/¡ C =
KA
˘T
A
˘V
KA
˘T
˘V
KA
˘VKAat 25¡C
˘T
x 100
A
6
x10
A
()
˘VKAat 25¡C
()
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TYPICAL PERFORMANCE CHARACTERISTICS
- Reverse Current (µA)
KA
I
100
10
1
0.1
TA = 0˚C to 70˚C
0.2
0.4 0.6 0.8 1.0 1.41.20
V
- Reverse Voltage (V)
R
- Reverse Current (µA)
KA
I
100
10
1
0.1
TA = 0˚C to 70˚C
0.5 1.0 1.5 2.0 3.02.50
V
- Reverse Voltage (V)
R
Figure 3. SPX1004-1.2V Reverse Operating Characteristic Figure 4. SPX1004-2.5 Reverse Operating Characteristic
10k
1k
Ω)
100
pedance (
10
- Reference Im
A
K
1
Z
IKA = 100µA
T
= 25°C
A
10k
1k
Ω)
100
pedance (
10
eference Im
- R
A
K
1
Z
IKA = 100µA
T
= 25°C
A
0.1
0.01 0.1 1 10 100
f = Frequency (kHz)
1k
0.1
0.01 0.1 1 10 100
f = Frequency (kHz)
1k
Figure 5. SPX1004-1.2V Reverse Dynamic Impedance Figure 6. SPX1004-2.5V Reverse Dynamic Impedance
1.2
TA = 25°C
0.8
0.4
= Forward Voltage (V)
F
V
0.0
0.01 0.1 1 10 100
IF = Forward Current (mA)
100
TA = 25°C
10
1
= Reference Impedance (Ω)
KA
Z
0.1
0.01 0.1 1 10 100
f = 25Hz
IKA = Reverse Current (mA)
Figure 7. Forward Characteristics for SPX1004-1.2 Figure 8. Low Frequency Reverse Dynamic Impedance
and SPX1004-2.5 for SPX1004-1.2
Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
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APPLICATION CIRCUITS
V
IN
V
V
IN
IN
3kΩ
100kΩ
100k
22Ω
OUT
SPX1004-1.2V
OUT
SPX1004-2.5V
SPX1004-2.5V
Figure 9a. 1.2V Reference, Figure 9b. 2.5V Reference Figure 10. Low Noise Reference
V
IN
0.1µF
LM317
V
V
IN
OUT
Adj
SPX1004-2.5V
V- – 1V
R ≤
0.015mA
200Ω
5k
OUT
+
10µF
VIN > 8V
+
22µF
V
LM338
IN
V
OUT
Adj
SPX1004-2.5V
Figure 11. Variable Output Regulator Figure 12. High Stability 5V Regulator
OUT
50µF
5V OUT
976Ω, 1%
324Ω, 1%
V
= 12V to 20V
IN
+
–
LO = Battery Low
150pF
1M
3
2
SPX1004-1.2
7
+
LM4250
–
4
8
6
22M
150pF
3.5M
500k
500k86.7k
12V
500k
SPX1004-1.2
Figure 13. Low Battery Detector Figure 14. Micropower 10V Reference
Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
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PACKAGE: PINOUTS
SOIC (S1)
1
2
3
4
Top View
8
7
6
5
N/C
N/C
N/C CATHODE
ANODE
CATHODE
N/C
ANODE
SOIC (S2) Alternate Pin Out
1
2
3
4
Top View
8
7
6
5
N/C
N/C
N/C CATHODE
ANODE
CATHODE
N/C
N/C
CATHODE
SOT-89 (M1)
1
2
ANODE
Top View
3
N/C
TO-92 (N)
13
N/C
CATHODE
Bottom View
2
ORDERING INFORMATION
Ordering No. Accuracy Output Voltage Packages
SPX1004M1-1.2 0.3% 1.235V 3-Pin SOT-89
SPX1004M1-1.2/TR 0.3% 1.235V 3-Pin SOT-89
SPX1004S1-1.2 0.3% 1.235V 8-Pin SOIC
SPX1004S1-1.2/TR 0.3% 1.235V 8-Pin SOIC
SPX1004S2-1.2 0.3% 1.235V 8-Pin SOIC,
alternate pinout
SPX1004S2-1.2/TR 0.3% 1.235V 8-Pin SOIC,
alternate pinout
SPX1004N-1.2 0.3% 1.235V 3-Pin TO-92
SPX1004N-1.2/TR 0.3% 1.235V 3-Pin TO-92
SPX1004M1-2.5 0.8% 2.500V 3-Pin SOT-89
ANODE
SPX1004M1-2.5/TR 0.8% 2.500V 3-Pin SOT-89
SPX1004S1-2.5 0.8% 2.500V 8-Pin SOIC
SPX1004S1-2.5/TR 0.8% 2.500V 8-Pin SOIC
SPX1004S2-2.5 0.8% 2.500V 8-Pin SOIC,
alternate pinout
SPX1004S2-2.5/TR 0.8% 2.500V 8-Pin SOIC,
alternate pinout
SPX1004N-2.5 0.8% 2.500V 3-Pin TO-92
SPX1004N-2.5/TR 0.8% 2.500V 3-Pin TO-92
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX1004N-1.2/TR = standard; SPX1004N-1.2-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 2,000 for TO-92,
2500 for NSOIC and SOT-89.
Sipex Corporation
Headquarters and
Sales Office
Corporation
ANALOG EXCELLENCE
Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
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