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LIN D O C #: 1004
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
T
HE
I
NFINITE
P
OWER
OF
I
N N O VAT I O N
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION The LX1004 Micropower Voltage References are two terminal bandgap reference diodes designed and optimized for accurate low power operation in portable and other power sensitive systems. Operating currents are guaranteed from as low as 10A up to 20mA giving designers a great deal of flexibility in optimizing power consumption, noise and ultimate application performance. The LX1004 is available in fixed 1.2V and 2.5V reference values. Process and circuit design optimization provide for high accuracy with initial tolerance values of 4mV and 20mV, respectively. Complementing their initial accuracy, the bandgap reference is temperature compensated to deliver 20ppm performance over the 0 to 70C operating temperature range. The LX1004 from Linfinity is a pinfor-pin replacement for the LT1004 and LM385 families of voltage references.
K E Y F E AT U R E S
s GUARANTEED 4mV INITIAL ACCURACY LX1004-1.2 s GUARANTEED 20mV INITIAL ACCURACY LX1004-2.5 s GUARANTEED 10A OPERATING CURRENT s GUARANTEED TEMPERATURE PERFORMANCE s OPERATES UP TO 20mA s VERY LOW DYNAMIC IMPEDANCE
A P P L I C AT I O N S
s s s s PORTABLE METER REFERENCES PORTABLE TEST INSTRUMENTS BATTERY OPERATED SYSTEMS CURRENT LOOP INSTRUMENTATION
PRODUCT HIGHLIGHT
MICROPOWER REFERENCE FROM 2 CELL BATTERY
2V
M I C R O P O W E R REFERENCE FROM 9 V BA T T E R Y
9V
39k 1.235V LX1004-1.2V
200k 2.5V LX1004-2.5V
PA C K A G E O R D E R I N F O R M AT I O N TA (C) 0 to 70
Reference Initial Voltage Tolerance
1.2V 2.5V 4mV 20mV
DM Plastic SOIC 8-pin
LX1004CDM-1.2 LX1004CDM-2.5
LP Plastic TO-92 3-pin
LX1004CLP-1.2 LX1004CLP-2.5
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX1004CDM-2.5T)
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright (c) 1996 Rev. 1.2 6/96
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
1
PRODUCT DATABOOK 1996/1997
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
P
RODUCTION
D
ATA
S
HEET
A B S O L U T E M A X I M U M R AT I N G S
(Note 1)
PACKAGE PIN OUTS
Reverse Breakdown Current .................................................................................... 30mA Forward Current ........................................................................................................ 10mA Operating Temperature Range ....................................................................... 0C to 70C Storage Temperature Range ...................................................................... -65C to 150C Lead Temperature (soldering, 10 seconds) ............................................................. 300C
Note 1. Values beyond which damage may occur. All voltages are specified with respect to ground, and all currents are positive into the specified terminal
N/C N/C N/C ANODE
1. 2. 3. 4.
CATHODE N/C 6. CATHODE 5. N/C
8. 7.
DM PACKAGE (Top View)
T H E R MAL DATA
DM PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA LP PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA 165C/W The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. 165C/W
1. ANODE 2. CATHODE 3. N/C
LP PACKAGE (Top View)
2
Copyright (c) 1996 Rev. 1.2 6/96
PRODUCT DATABOOK 1996/1997
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply to TA = 25C for LX1004C. Typ. number represents TA = 25C value.
LX1004 - 1.2
Parameter
Reverse Breakdown Voltage Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Change with Current
Symbol
VZ VZ Temp IMIN VZ IR rz en VZ Time
Test Conditions
IR = 100A, TA = 25C 0 TA 70C IMIN IR 20mA 0 TA 70C I MIN IR 1mA, TA = 25C IMIN IR 1mA, 0 T A 70C 1mA IR 20mA, TA = 25C 1mA IR 20mA, 0 TA 70C IR = 100A, TA = 25C IR = 100A, 0 TA 70C IR = 100A; 10Hz f 10kHz IR = 100A; TA = 25C 0.1C
LX1004 - 1.2 Min. Typ. Max.
1.231 1.225 1.235 1.235 20 8 1.239 1.245
Units
V V ppm/C A mV mV mV mV V ppm/kHr
Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability
0.2 60 20
10 1 1.5 10 20 0.6 1.5
LX1004 - 2.5
Parameter
Reverse Breakdown Voltage Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Change with Current
Symbol
VZ VZ Temp IMIN VZ IR rz en VZ Time
Test Conditions
IR = 100A, TA = 25C 0 TA 70C IMIN IR 20mA 0 TA 70C I MIN IR 1mA, TA = 25C IMIN IR 1mA, 0 T A 70C 1mA IR 20mA, TA = 25C 1mA IR 20mA, 0 TA 70C IR = 100A, TA = 25C IR = 100A, 0 TA 70C IR = 100A; 10Hz f 10kHz IR = 100A; TA = 25C 0.1C
LX1004 - 2.5 Min. Typ. Max.
2.480 2.470 2.500 20 12 20 1 1.5 10 20 0.6 1.5 2.520 2.530
Units
V V ppm/C A mV mV mV mV V ppm/kHr
Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability
0.2 120 20
GRAPH / CURVE INDEX
Characteristic Curves -- LX1004-1.2V
FIGURE # 1. 2. 3. 4. 5. 6. 7. TEMPERATURE DRIFT REVERSE CHARACTERISTICS REVERSE VOLTAGE CHANGE FORWARD CHARACTERISTICS REVERSE DYNAMIC IMPEDANCE NOISE VOLTAGE RESPONSE TIME FIGURE # 1. 2. 3. 4. 5. 6.
Characteristic Curves -- LX1004-2.5V
RESPONSE TIME REVERSE CHARACTERISTICS FORWARD CHARACTERISTICS TEMPERATURE DRIFT NOISE VOLTAGE REVERSE DYNAMIC IMPEDANCE
Copyright (c) 1996 Rev. 1.2 6/96
3
PRODUCT DATABOOK 1996/1997
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
P
RODUCTION
D
ATA
S
HEET
C H A R A C T E R I S T I C C U R V E S -- LX1004-1.2V
FIGURE 1. -- TEMPERATURE DRIFT
1.242
FIGURE 2. -- REVERSE CHARACTERISTICS
100
IR = 100A
1.24
TA = 0 to 70C
Reference Voltage - (V)
Reverse Current - (A)
1.238 1.236 1.234 1.232 1.23 1.228 1.226 0 10 20 30 40 50 60 70
10
1
0.1 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Temperature - (C)
Reverse Voltage - (V)
FIGURE 3. -- REVERSE VOLTAGE CHANGE
16 14
FIGURE 4. -- FORWARD CHARACTERISTICS
1.2
TA = 25C
TA = 0 to 70C
Output Voltage Change - (mV)
12 10 8 6 4 2 0 -2 -4 0.01
Forward Voltage - (V)
0.8
0.4
0.1
1
10
100
0 0.01
0.1
1
10
100
Reverse Current - (mA)
Forward Current - (mA)
4
Copyright (c) 1996 Rev. 1.2 6/96
PRODUCT DATABOOK 1996/1997
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
P
RODUCTION
D
ATA
S
HEET
C H A R A C T E R I S T I C C U R V E S -- LX1004-1.2V
FIGURE 5. -- REVERSE DYNAMIC IMPEDANCE
1000
FIGURE 6. -- NOISE VOLTAGE
800
TA = 25C
700
(VN) Noise Voltage - (nV/ Hz)
Dynamic Impedance - ()
100
600 500 400 300 200 100
10
1
IR = 100A TA = 25C
100 1k 10k 100k
0.1 10 100 1k 10k 100k
0 10
(f) Frequency - (Hz)
(f) Frequency - (Hz)
FIGURE 7. -- RESPONSE TIME
Output Voltage
1.5V 1.0V 0.5V 0
VIN
36k
VOUT
Input Voltage
5V 0
0
50
100
500
550
Time - (s)
Copyright (c) 1996 Rev. 1.2 6/96
5
PRODUCT DATABOOK 1996/1997
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
P
RODUCTION
D
ATA
S
HEET
C H A R A C T E R I S T I C C U R V E S -- LX1004-2.5V
FIGURE 8. -- RESPONSE TIME
FIGURE 9. -- REVERSE CHARACTERISTICS
Output Voltage
4.0V
TA = 25C
2.0V
100
TA = 25C
VIN
0
24K
Reverse Current - (A)
VOUT
10
Input Voltage
1
5 0
0.1 0 1.0 2.0 3.0 4.0 5.0
Time - (100s/Div.)
Reverse Voltage - (V)
FIGURE 10. -- FORWARD CHARACTERISTICS
1.0
FIGURE 11. -- TEMPERATURE DRIFT
2.52
TA = 25C
0.8
2.515
Reference Voltage - (V)
Forward Voltage - (V)
2.51 2.505 2.5 2.495 2.49 2.485
0.6
0.4
0.2
0 0.001
0.01
0.1
1
10
100
2.48 -40
20
0
20
40
60
80
100
Forward Current - (mA)
Temperature - (C)
6
Copyright (c) 1996 Rev. 1.2 6/96
PRODUCT DATABOOK 1996/1997
LX1004
1.2V & 2.5V M I C R O P O W E R VOLTA G E REFERENCES
P
RODUCTION
D
ATA
S
HEET
C H A R A C T E R I S T I C C U R V E S -- LX1004-2.5V
FIGURE 12. -- NOISE VOLTAGE
FIGURE 13. -- REVERSE DYNAMIC IMPEDANCE
100
(VN) Noise Voltage - (nV/ Hz)
1800 1500
TA = 25C IR = 100A
Dynamic Impedance - ()
IR = 100A TA = 25C
100 1k 10k 100k
10
1200 900 600
1
300
10
0.1 10
100
1k
10k
100k
(f) Frequency - (Hz)
(f) Frequency - (Hz)
Copyright (c) 1996 Rev. 1.2 6/96
7

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