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Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
SPX1004
FEATURES
■ 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
®
APPLICATIONS
■ A/D and D/A Reference
■ Reference for 5V Systems
■ Digital Voltmeter
■ Power Supply Monitor
BLOCK DIAGRAMS
1.2V / 2.5V Micropower Voltage Reference
Figure 1a. SPX1004-1.2 Block Diagram Figure 1b. SPX1004-2.5 Block Diagram
1.235V
+
-
Cathode (K)
Anode (A)
+
-
Cathode (K)
Anode (A)
1.250V
500k
500k
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 tempera-
ture 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.
DESCRIPTION
1
2
3
45
6
7
8
N/C
SPX1004
8 Pin nSOIC
CATHODE
N/C
N/C N/C
ANODE
ANODE
CATHODE
Now Available in Lead Free Packaging
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Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
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°C1.231 1.235 1.239 2.480 2.500 2.520 V
0°C≤TA≤70°C1.225 1.235 1.245 2.470 2.500 2.530
Ave Temp. Coeff. Imin≤IZ≤20mA 20 60 ppm/
°C
Min Operating Current 4 10 12 20 µA
Reverse Breakdown Imin≤IZ≤1mA 0.5 1 0.5 1 mV
Votlage Change over temperature 0.5 1.5 0.5 1.5
with Current 1mA≤IZ≤20mA 6.5 10 6.5 10
over temperature 6.5 20 6.5 20
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/
kHr
Operating Temp Range 0 70 0 70 °C
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 (IKA).....................................................30mA
Lead Temperature (soldering, 10 seconds).................300°C
Storage Temperature Range.......................-65°C to +150°C
Junction Temperature..................................................150°C
Continuous Power Dissipation (PD)
TO-92.........................................................775mW
SOIC-8.......................................................750mW
SOT-89.....................................................1000mW
V
K
0153045607590105
-10
0.55000
000
0.07 mV/¡C
0.003 %/¡C
27 ppm/¡C
TC in mV/¡C =
TC in %/¡C =
˘V
KA
(mV)
˘T
A
˘T
A
˘V
KA
at 25¡C
˘V
KA
x100
()
TC in ppm/¡C = ˘T
A
˘V
KA
at 25¡C
˘V
KA
x10
6
()
ppm %mV
Junction Temperature (¡C)
Figure 2. VREF vs Temperature for 2.5V Version
TYPICAL THERMAL RESISTANCES
PACKAGE 0JA 0JA TYPICAL
DERATING
TO-92 160°C/W 80°C/W 6.3 mW/°C
SOIC-8 175°C/W 45°C/W 5.7mW/°C
SOT-89 110°C/W 8°C/W 9.1mW/°C
ELECTRICAL CHARACTERISTICS
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Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
Figure 3. SPX1004-1.2V Reverse Operating Characteristic Figure 4. SPX1004-2.5 Reverse Operating Characteristic
Figure 5. SPX1004-1.2V Reverse Dynamic Impedance Figure 6. SPX1004-2.5V Reverse Dynamic Impedance
Figure 7. Forward Characteristics for SPX1004-1.2 Figure 8. Low Frequency Reverse Dynamic Impedance
and SPX1004-2.5 for SPX1004-1.2
TYPICAL PERFORMANCE CHARACTERISTICS
100
10
1
0.1
T
A
= 0˚C to 70˚C
0.4 0.6 0.8 1.0 1.41.20
V
R
- Reverse Voltage (V)
I
KA
- Reverse Current (µA)
0.2
10k
1k
100
10
1
0.1
0.01 0.1 1 10 100
f = Frequency (kHz)
Z
KA
- Reference Impedance (Ω)
1k
I
KA
= 100µA
T
A
= 25°C
10k
1k
100
10
1
0.1
0.01 0.1 1 10 100
f = Frequency (kHz)
Z
KA
- Reference Impedance (Ω)
1k
I
KA
= 100µA
T
A
= 25°C
1.2
0.8
0.4
0.0
0.01 0.1 1 10 100
T
A
= 25°C
I
F
= Forward Current (mA)
V
F
= Forward Voltage (V)
100
10
1
0.1
0.5 1.0 1.5 2.0 3.02.50
T
A
= 0˚C to 70˚C
VR - Reverse Voltage (V)
IKA - Reverse Current (µA)
100
10
1
0.1
0.01 0.1 1 10 100
IKA = Reverse Current (mA)
ZKA = Reference Impedance (Ω)
TA = 25°C
f = 25Hz
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Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
APPLICATION CIRCUITS
Figure 11. Variable Output Regulator Figure 12. High Stability 5V Regulator
Figure 13. Low Battery Detector Figure 14. Micropower 10V Reference
Figure 9a. 1.2V Reference, Figure 9b. 2.5V Reference Figure 10. Low Noise Reference
V
IN
3kΩ
SPX1004-1.2V
OUT
VIN
100kΩ
SPX1004-2.5V
OUT
V
IN
100k
SPX1004-2.5V
OUT
22Ω
50µF
SPX1004-2.5V
OUT
200Ω
10µF
0.1µFAdj
LM317
5k
+
R ≤V- – 1V
0.015mA
V
IN
V
IN
V
OUT
VIN > 8V
SPX1004-2.5V
5V OUT
976Ω, 1%
VIN VOUT
Adj
LM338
22µF
+
324Ω, 1%
LO = Battery Low
SPX1004-1.2
150pF
500k86.7k
12V
+
–
500k
SPX1004-1.2
150pF
1M
3.5M
+
–
500k
LM4250
3
2
7
6
8
22M
V
IN
= 12V to 20V
4
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Date: 5/25/04 SPX1004 1.2V/2.5V Micropower Voltage Reference © Copyright 2004 Sipex Corporation
PACKAGE: PINOUTS
Top View
SOT-89 (M1)
123
Bottom View
TO-92 (N)
13
2
CATHODE
N/C
Top View
2
1
3
4
8
7
6
5
SOIC (S2) Alternate Pin Out
CATHODE
ANODE
N/C
N/C
N/C CATHODE
N/C
N/C
ANODE
CATHODE
ANODE
N/C
Top View
2
1
3
4
8
7
6
5
SOIC (S1)
CATHODE
ANODE
N/C
N/C
N/C CATHODE
N/C
ANODE
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
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
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
ORDERING INFORMATION
/TR = Tape and Reel
Pack quantity is 2,000 for TO-92,
2500 for NSOIC and SOT-89.
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
