SPX385N-L-2.5 [EXAR]
Two Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, BIPolar, PBCY3, LEAD FREE, TO-92, 3 PIN;
| 型号： | SPX385N-L-2.5 |
| 厂家： | 
EXAR CORPORATION |
| 描述： | Two Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, BIPolar, PBCY3, LEAD FREE, TO-92, 3 PIN |
| 文件： | 总9页 (文件大小：167K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SPX385-2.5
Micropower Voltage Reference
FEATURES
N/C
■ Trimmed Bandgap............................ 1% and 2%
■ Wide Operating Current ............... 20µA to 20mA
■ Extended Temperature Range ... -40°C to +85°C
■ Dynamic Impedance .............................. 1Ω max
■ Offered in SOT-23, TO-92, SOIC, and SOT-89
■ Improved Replacement for LM185/285/385-2.5V,
AS385-2.5
SPX385
3 Pin SOT-23
Cathode
Anode
Now Available in Lead Free Packaging
■ Temp Co 140ppm/°C
Refer to page 4 for pinouts.
APPLICATIONS
■ Battery Operating Equipment
■ Adjustable Supplies
■ Error Amplifiers
■ Single Supply Amplifier
■ Monitors / VCR / TV
■ Personal Computers
■ Switching Power Supplies
DESCRIPTION
The SPX385-2.5 is a micropower 2-terminal band-gap voltage reference with a very wide
operating current range from 20µA to 20mA that provides a stable voltage. The high stability of
thisdeviceisprimarilytheresultofthelowtemperaturecoefficientThinFilmResistorprocessand
Laser Trimming of the output voltage at the wafer level.
TheSPX385-2.5isavailableinaSOT-23,TO-92,SOIC-8andSOT-89packagewithanoperating
temperature range of -40°C to 85°C. A 1.2 and 5 volt device is also available - SPX385-1.2 and
SPX385-5.
BLOCK DIAGRAM
Cathode (K)
500k
+
-
500k
1.25V
Figure 1: Block Diagram
Anode (A)
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
1
ABSOLUTE MAXIMUM RATINGS
TYPICAL THERMAL RESISTANCES
PACKAGE
0JA
0JC
TYPICAL DERATING
Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS 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
abovethoseindicatedintheoperationalsectionsofthisspecificationisnot
implied. Exposure to absolute maximum rating conditions for extended
periods may affect reliability.
TO-92
160°C/W 80°C/W
575°C/W 150°C/W
175°C/W 45°C/W
110°C/W 8°C/W
6.3 mW/°C
SOT-23
SOIC-8
SOT-89
1.7 mW/°C
5.7 mW/°C
9.1 mW/°C
Reverse Current (IKA) ............................................................. 30mA
Forward Current (IAK) ............................................................. 10mA
Operating Temperature Range (TA) ............................ -40 to +85°C
Junction Temperature (TJ) ..................................................... 150°C
Storage Temperature (TSTG) ....................................... - 65 to 150°C
Lead Temperature (Soldering 10 sec.), TL ............................. 300°C
Typical deratings of the thermal resistances are
given for ambient temperature >25°.
ELECTRICAL CHARACTERISTICS
IIN = 100µA, TA = 25°C, unless otherwise specified.
SPX385A-2.5
SPX385-2.5
PARAMETER
CONDITIONS
MIN. TYP. MAX MIN. TYP. MAX. UNIT
Reference Voltage
2.475 2.500 2.525 2.450 2.500 2.550
V
Dynamic Output
Impedance
F = 20Hz
0.6
1.0
0.6
1.0
Ω
IR = 100µA
Reference Voltage
Change with IR.
20µA ≤ IR ≤ 20mA
10
20
10
20
mV
Temperature Coefficient
Minimum Operating Current
Output Wideband Noise
Long Term Stability
Note 1
80
15
140
80
15
140 ppm/°C
20
20
µA
10Hz ≤ f ≤ 10kHz
120
60
120
60
µVrms
ppm
T=1000Hr;
TA = 25°C ±0.1°C
Operating Temperature
-40
+85
-40
+85
°C
Note 1. Three-point measurement guarantees the error band over the specified temperature range.
*CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)
mV
ppm
%
0
0
0
DVKA (mV)
DTA
DVKA
TC in mV/°C =
D
DVKA
DVKA at 25°C
DTA
-10
x 100
(
)
%
TC in
/°C =
5000
0.5
DVKA
DV at 25°C
KA
6
x 10
(
)
TC in ppm/°C =
0
15
30
45
60
75
90
105
DTA
Junction Temperature (°C)
0.07 mV/°C
0.003 %/°C
27 ppm/°C
Figure 2. VKA vs. Temperature
Date: 02/29/208
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
2
TYPICAL PERFORMANCE CHARACTERISTICS
30
VKA
25
Temperature Range: 0°C to 85°C
V
IN
20
V
KA
15
10
5
0
I
K
-5
-10
-15
-20
-2
-1
0
1
2
3
VKA - Cathode Voltage (V)
Figure 3. Test Circuit
Figure 4. High Current Operating Characteristics
45
2.53
IK = 10mA
2.52
2.51
2.50
30
VREF = 2.500V at 25°C
85°C
2.49
15
25°C
-0°C
2.48
2.47
2.46
0
2.45
-1.0
0
1.0
2.0
3.0
-60
-30
0
30
60
90
120
VKA - Cathode Voltage (V)
TA - Ambient Temperature (°C)
Figure 6. Low Current Operating Characteristics
Figure 5. Reference Voltage vs. Ambient Temperature
SPX385-2.5
2.5V
=
SPX385-2.5
30V
* I
OUT
2.5V
R2
R2
* I
=
OUT
C1
C1
150pF
R1
68k
R1
68k
150pF
2
3
7
–
2
3
7
–
6
LM312
6
LM312
+
4
+
4
I
*
OUT
R2
I
*
OUT
R2
-1.5V to -27V
1.5V to 27V
-30V
Figure 7b. Precision 1µA to 1mA Current Source
Figure 7a. Precision 1µA to 1mA Current Sink
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
9V
V
IN
5V
LM338
200k
375
120
SPX385-2.5
2.5V
SPX385-2.5
Figure 8. Improving Regulation of Adjustable Regula-
tors
Figure 9. Micropower Reference from 9V Battery
I
Q
V
IN
= 15V
V
IN
= 3.7V to 30V
500k
7
2
3
+
6
10V
LM4250C
LM334
-
8
3.3k
4
1.5M
500k
150pF
22M
OUT
2.5V
SPX385-2.5
SPX385-2.5
I
≅ 30µA Standby Current
Q
Figure 11: Precision Micropower 10V Reference
Figure 10. Wide Input Range Reference
PACKAGE PINOUTS
8-Pin NSOIC
SOT-23-3 (M)
TO-92 (N)
SOT-89 (M1)
3
CATHODE
1
2
3
4
8
7
6
5
N/C
N/C
1
2
3
N/C
N/C
N/C
1
3
1
2
2
N/C
CATHODE ANODE
N/C ANODE CATHODE
ANODE
ANODE
N/C
N/C
CATHODE
Top View
Bottom View
Top View
Top View
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
4
PACKAGE: 3 PIN SOT-23
D
b
3
B
B
SEE VIEW C
VIEW A-A
E1
E
1
2
e
Gauge Plane
e1
Seating Plane
L
Ø
L1
VIEW C
A
A2
A
Seating Plane
C
3 Pin SOT-23 JEDEC TO-236 (AB) Variation
A
A1
SIDE VIEW
MIN
0.89
0.01
0.88
0.3
NOM
-
-
0.95
-
MAX
1.12
0.1
1.02
0.5
SYMBOL
A
A1
A2
b
c
D
e
e1
E
0.08
2.8
-
0.2
3.04
b
2.9
0.95 BSC
1.90 BSC
-
1.3
0.5
WITH PLATING
0.95
1.2
0.4
2.64
1.4
0.6
E1
L
c
L1
ø
0.54 REF
-
0º
8º
Note: Dimensions in (mm)
BASE METAL SECTION B-B
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
5
PACKAGE: 3 PIN SOT-89
D
D1
3
Ø1.0
E
H
5º(2x)
L
1
2
e
e1
C
8º(2x)
3 Pin SOT-89
MIN
0.36
0.8
NOM
0.42
-
MAX
0.48
1.2
SYMBOL
b
L
b1
C
D
D1
H
E
0.41
0.38
4.4
1.4
3.94
2.4
0.47
0.4
4.5
1.6
-
2.5
1.5
3
0.53
0.43
4.6
1.75
4.25
2.6
Ro.15
e
e1
1.45
2.9
1.55
3.1
b
b
b1
Note: Dimensions in (mm)
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
6
PACKAGE: 8 PIN NSOIC
D
Ø
e
E/2
L2
E1
E1/2
E
Ø
Seating Plane
Ø1
L
L1
Gauge Plane
VIEW C
1
b
INDEX AREA
(D/2 X E1/2)
TOP VIEW
A1
A
Seating Plane
A2
SIDE VIEW
8 Pin NSOIC JEDEC MO-012 (AA) Variation
MIN
1.35
0.1
1.25
0.31
0.17
NOM
-
-
-
-
-
MAX
1.75
0.25
1.65
0.51
0.24
SYMBOL
A
A1
A2
b
B
B
SEE VIEW C
c
D
E
E1
e
L
4.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
-
0.4
1.27
b
L1
L2
ø
1.04 REF
0.25 BSC
-
0º
5º
8º
15º
ø1
-
c
Note: Dimensions in (mm)
BASE METAL
SECTION B-B
WITH PLATING
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
7
PACKAGE: 3 PIN TO-92
L
e1
e
W
D
A
b
S1
3 Pin TO-92
MIN
0.17
0.014
0.13
0.95
0.045
0.5
0.085
0.045
0.016
0.175
4º
NOM
MAX
0.195
0.02
0.155
0.105
0.055
0.61
0.095
0.06
0.022
0.195
6º
SYMBOL
A
b
E
e
e1
L
-
-
-
-
-
-
-
-
-
-
-
R
E
R
S1
W
D
a
Note: Dimensions in (inches)
a(2x)
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
8
ORDERING INFORMATION
Part Number
Accuracy
1.0%
1.0%
1.0%
1.0%
1.0%
1.0%
1.0%
1.0%
2.0%
2.0%
2.0%
2.0%
2.0%
2.0%
2.0%
2.0%
Output Voltage
2.5V
Package Type
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-89
3-Pin SOT-89
8-Pin NSOIC
8-Pin NSOIC
3-Pin TO-92
3-Pin TO-92
3-Pin SOT-23
3-Pin SOT-23
3-Pin SOT-89
3-Pin SOT-89
8-Pin NSOIC
8-Pin NSOIC
3-Pin TO-92
3-Pin TO-92
SPX385AM-2.5
SPX385AM-2.5/TR
SPX385AM1-2.5
SPX385AM1-2.5/TR
SPX385AS-2.5
SPX385AS-2.5/TR
SPX385AN-2.5
SPX385AN-2.5/TR
SPX385M-2.5
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
SPX385M-2.5/TR
SPX385M1-2.5
SPX385M1-2.5/TR
SPX385S-2.5
2.5V
2.5V
2.5V
2.5V
SPX385S-2.5/TR
SPX385N-2.5
2.5V
2.5V
SPX385N-2.5/TR
2.5V
Available in lead free packaging. To order add “-L” suffix to part number.
Example: SPX385S-2.5/TR = standard; SPX385S-L-2.5/TR = lead free
/TR = Tape and Reel
Pack quantity is 2000 for TO-92 and 2500 for SOT-23, SOT-89 and NSOIC.
.
Exar Corporation
Headquarters and
Sales Office:
48720 Kato Road
Fremont, CA 94538
main: 510-668-7000
fax: 510-668-7030
Exar Corporation reserves the right to make changes to any products described herein. Exar does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 02/29/2008
SPX385-2.5 Micropower Voltage Reference
© Copyright 2008 Exar Corporation
9
相关型号：
SPX385N-L-2.5/TR
Two Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, BIPolar, PBCY3, LEAD FREE, TO-92, 3 PIN
EXAR
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