SPX1004
1.2V / 2.5V Micropower Voltage Reference
FEATURES
■
Initial Voltage Tolerance:
SPX1004-1.2 =
±10mV
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
0.6
Ω
Max.
■
Direct Replacement for LT1004,
LM1004 and AS1004
■
Lead Free, RoHS Compliant
Packages
N/C 1
8 CATHODE
N/C 2
SPX1004
8 Pin
NSOIC
7 N/C
N/C 3
ANODE 4
6 CATHODE
5 ANODE
APPLICATIONS
■
A/D and D/A Reference
■
Reference for 5V Systems
■
Digital Voltmeter
■
Power Supply Monitor
DESCRIPTION
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
±10mV
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,
NSOIC-8
and TO-92 packages over the operating
temperature range of 0°C to 70°C.
BLOCK DIAGRAMS
Cathode (K)
Cathode (K)
500k
+
-
1.235V
500k
+
-
1.250V
Anode (A)
Anode (A)
Figure 1a. SPX1004-1.2 Block Diagram
Date:
05/17/07
Figure 1b. SPX1004-2.5 Block Diagram
© Copyright 2007 Sipex Corporation
SPX1004 1.2V/2.5V Micropower Voltage Reference
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.
Continuous Power Dissipation (P
D
)
TO-92.........................................................775mW
NSOIC-8.....................................................750mW
SOT-89.....................................................1000mW
Forward Current (I
AK
).....................................................10mA
Reverse Current (I
KA
).....................................................30mA
Lead Temperature (soldering, 10 seconds).................300°C
Storage Temperature Range.......................-65°C to +150°C
Junction Temperature..................................................150°C
TYPICAL THERMAL RESISTANCES
PACKAGE
TO-92
NSOIC-8
SOT-89
0
-
JA
160°C/W
175°C/W
110°C/W
-
0
JA
80°C/W
45°C/W
8°C/W
TYPICAL
DERATING
6.3 mW/°C
5.7mW/°C
9.1mW/°C
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over full junction temperature range (0°C to 70°C). Ambient temperature 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
I
Z
=100µA, T
J
=25°C
1.225 1.235 1.245
2.480 2.500 2.520
V
Ave Temp. Coeff.
Min Operating Current
Reverse Breakdown
Voltage Change
with Current
Reverse Dynamic
Impedance
Wide Band Noise
Long Term Stability
Operating Temp Range
0°C≤T
A
≤70°C
I
min
≤I
Z
≤20mA
1.219 1.235 1.251
20
4
0.5
0.5
6.5
6.5
0.2
1
60
20
0
10
1
1.5
10
20
0.6
1.5
120
60
70
0
70
2.470 2.500 2.530
60
12
0.5
0.5
6.5
6.5
0.8
20
1
1.5
10
20
0.9
1.5
µV
ppm/
kHr
°C
ppm/
°C
µA
mV
I
min
≤I
Z
≤1mA
over temperature
1mA≤I
Z
≤20mA
over temperature
I
Z
=100µA, f=25Hz
over temperature
I
Z
=100µA, 10Hz≤f≤10kHz
I
Z
=100µA, T
A
=25°C±0.1°C
Ω
ppm
0
%
0
mV
0
VK
TC in mV/¡C =
˘ 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
Junction Temperature (¡C)
105
TC in ppm/¡C =
(
˘ V
KA
˘V
KA
at 25¡C
˘ T
A
)
x 10
6
0.07 mV/¡C
0.003 %/¡C
27 ppm/¡C
Figure 2. V
REF
vs Temperature for 2.5V Version
Date:
05/17/07
SPX1004 1.2V/2.5V Micropower Voltage Reference
© Copyright 2007 Sipex Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
100
T
A
= 0˚C to 70˚C
100
T
A
= 0˚C to 70˚C
- Reverse Current (µA)
I
KA
I
KA
- Reverse Current (µA)
10
10
1
1
0.1
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
V
R
- Reverse Voltage (V)
0.1
0
0.5
1.0
1.5
2.0
2.5
3.0
V
R
- Reverse Voltage (V)
Figure 3. SPX1004-1.2V Reverse Operating Characteristic
Figure 4. SPX1004-2.5 Reverse Operating Characteristic
10k
I
KA
= 100µA
T
A
= 25°C
Z
KA
- Reference Impedance (Ω)
10k
I
KA
= 100µA
T
A
= 25°C
1k
Z
KA
- Reference Impedance (Ω)
1k
100
100
10
10
1
1
0.1
0.01
0.1
1
10
100
1k
0.1
0.01
0.1
1
10
100
1k
f = Frequency (kHz)
f = Frequency (kHz)
Figure 5. SPX1004-1.2V Reverse Dynamic Impedance
Figure 6. SPX1004-2.5V Reverse Dynamic Impedance
1.2
T
A
= 25°C
Z
KA
= Reference Impedance (Ω)
100
V
F
= Forward Voltage (V)
T
A
= 25°C
f = 25Hz
10
0.8
0.4
1
0.0
0.01
0.1
1
10
100
0.1
0.01
0.1
1
10
100
I
F
= Forward Current (mA)
I
KA
= Reverse Current (mA)
Figure 7. Forward Characteristics for SPX1004-1.2
and SPX1004-2.5
Figure 8. Low Frequency Reverse Dynamic Impedance
for SPX1004-1.2
Date:
05/17/07
SPX1004 1.2V/2.5V Micropower Voltage Reference
© Copyright 2007 Sipex Corporation
3
APPLICATION CIRCUITS
V
IN
V
IN
V
IN
3kΩ
100kΩ
100k
22Ω
OUT
SPX1004-1.2V
OUT
SPX1004-2.5V
OUT
SPX1004-2.5V
50µF
Figure 9a. 1.2V Reference, Figure 9b. 2.5V Reference
Figure 10. Low Noise Reference
V
IN
LM317
V
IN
Adj
0.1µF
200Ω
+
10µF
V
OUT
OUT
V
IN
> 8V
LM338
V
IN
Adj
976Ω, 1%
+
22µF
324Ω, 1%
V
OUT
5V OUT
SPX1004-2.5V
5k
SPX1004-2.5V
-
R
≤
V – 1V
0.015mA
Figure 11. Variable Output Regulator
Figure 12. High Stability 5V Regulator
V
IN
= 12V to 20V
LO = Battery Low
86.7k
500k
1M
7
3
+
12V
500k
2
+
LM4250
–
4
8
6
–
150pF
22M
150pF
3.5M
SPX1004-1.2
SPX1004-1.2
500k
Figure 13. Low Battery Detector
Figure 14. Micropower 10V Reference
Date:
05/17/07
SPX1004 1.2V/2.5V Micropower Voltage Reference
© Copyright 2007 Sipex Corporation
4
PACKAGE: PINOUTS
NSOIC
(S1)
N/C
N/C
N/C
ANODE
1
2
3
4
8
7
6
5
CATHODE
N/C
CATHODE
ANODE
NSOIC
(S2) Alternate Pin Out
N/C
N/C
N/C
ANODE
1
2
3
4
8
7
6
5
CATHODE
N/C
SOT-89 (M1)
1
TO-92 (N)
2
3
1
CATHODE
CATHODE
N/C
2
3
N/C
N/C
ANODE
CATHODE
ANODE
Top View
Top View
Top View
Bottom View
PACKAGE: 3 PIN SOT-89
Date:
05/17/07
SPX1004 1.2V/2.5V Micropower Voltage Reference
© Copyright 2007 Sipex Corporation
5
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