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LT1034-1.2/LT1034-2.5 Micropower Dual Reference
FEATURES
s s s s s
DESCRIPTION
The LT (R)1034 is a micropower, precision 1.2V/2.5 reference combined with a 7V auxiliary reference. The 1.2V/2.5V reference is a trimmed, thin-film, band-gap, voltage reference with 1% initial tolerance and guaranteed 20ppm/C temperature drift. Operating on only 20A, the LT1034 offers guaranteed drift, low temperature cycling hysteresis and good long-term stability. The low dynamic impedance makes the LT1034 easy to use from unregulated supplies. The 7V reference is a subsurface zener device for less demanding applications. The LT1034 reference can be used as a high performance upgrade of the LM385 or LT1004, where guaranteed temperature drift is desired.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Guaranteed 20 ppm/C Drift (H Package and Z Package) Guaranteed 40 ppm/C Drift (SO-8 Package) 20A to 20mA Operation (1.2V) Dynamic Impedance: 1 7V, 100A Reference
APPLICATIONS
s s s
Portable Meters Precision Regulators Calibrators
TYPICAL APPLICATION AND BLOCK DIAGRAM
15V
Temperature Drift LT1034CS8-1.2
2.5 2.0
REVERSE VOLTAGE CHANGE (mV)
50k
500k 1.2V OR 2.5V OUTPUT
1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0
7V OUTPUT
7V
1.225V OR 2.500V
LT1034 * TA01
-2.5 -50 -25
RELATED PARTS
PART NUMBER LT1004 LT1019 LT1236 DESCRIPTION Low Cost Precision Band-Gap Precision Series or Shunt Band-Gap Precision Series or Shunt Buried Zener COMMENTS Micropower, SO-8, Industrial Temperature Options Low Dropout, Multiple Output Options Low Noise, Low Power, Multiple Output Options
U
W
UU
U
50 25 0 75 TEMPERATURE (C)
100
125
LT1034 * TPC02
1
LT1034-1.2/LT1034-2.5
ABSOLUTE MAXIMUM RATINGS
Operating Current ................................................. 20mA Forward Current (Note 1)...................................... 20mA Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C Operating Temperature Commercial ............................................. 0 to 70C Industrial .......................................... - 40C to 85C Military ........................................... - 55C to 125C
PACKAGE/ORDER INFORMATION
BOTTOM VIEW 1.2V 7V
ORDER PART NUMBER LT1034BCH-1.2 LT1034BCH-2.5 LT1034BMH-1.2 LT1034BMH-2.5 LT1034CH-1.2 LT1034CH-2.5 LT1034MH-1.2 LT1034MH-2.5 ORDER PART NUMBER LT1034BCZ-1.2 LT1034BCZ-2.5 LT1034BIZ-1.2 LT1034BIZ-2.5 LT1034CZ-1.2 LT1034CZ-2.5 LT1034IZ-1.2 LT1034IZ-2.5
H PACKAGE 3-LEAD TO-46 METAL CAN TJMAX = 150C, JA = 440C/ W, JC = 80C/ W
BOTTOM VIEW 1.2V 7V
Z PACKAGE 3-LEAD TO-92 PLASTIC
TJMAX = 100C, JA = 160C/ W
ELECTRICAL CHARACTERISTICS
PARAMETER Reverse Breakdown Voltage Reverse Breakdown Change with Current CONDITIONS IR = 100A
TA = 25C, unless otherwise specified.
LT1034-1.2 MIN TYP MAX 1.210 1.225 1.240 1.205 1.225 1.245 0.5 2.0 1.0 4.0 4.0 8.0 6.0 15.0 10 20 10 20 20 40 0.25 1.0 0.50 2.0 4 20 MIN 2.46 2.43 LT1034-2.5 TYP MAX 2.5 2.54 2.5 2.57 1.0 3.0 1.5 6.0 6.0 16.0 10.0 20.0 15 30 10 20 20 40 0.5 1.5 1.0 2.5 6 20 UNITS V V mV mV mV mV A ppm/C ppm/C VP-P ppmkhrs
Note 3
q
2mA IR 20mA
q
Minimum Operating Current Temperature Coefficient Reverse Dynamic Impedance (Note 2) Low Frequency Noise Long-Term Stability
IR = 100A IR = 100A
LT1034B LT1034
IR = 100A, 0.1Hz F 10Hz IR = 100A
2
U
U
W
WW U
W
ORDER PART NUMBER
TOP VIEW NC 1 NC 2 NC 3 GND 4 8 7 6 5 2.5V NC 2.5V 7V
LT1034CS8-1.2 LT1034CS8-2.5 LT1034IS8-1.2 LT1034IS8-2.5 PART MARKING 3401 3402 34I01 34I02
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 175C, JA = 150C/ W
q
q q
q q
LT1034-1.2/LT1034-2.5
ELECTRICAL CHARACTERISTICS
PARAMETER Reverse Breakdown Voltage Reverse Breakdown Change with Current CONDITIONS IR = 100A 100A IR 1mA 100A IR 1mA 1mA IR 20mA 1mA IR 20mA IR = 100A IR = 100A
7V Reference. TA = 25C, unless otherwise specified.
MIN 6.80 6.75 TYP 7.0 7.0 90 100 160 200 40 20 MAX 7.3 7.4 140 190 250 350 UNITS V V mV mV mV mV ppm/C ppmkhrs
q q q q
Temperature Coefficient Long-Term Stability
The q denotes specifications which apply over the full operating temperature range. Note 1: Forward biasing either diode will affect the operation of the other diode.
Note 2: This parameter guaranteed by "reverse breakdown change with current" test. Note 3: For the LT1034-1.2: 20A IR 2mA. For the LT1034-2.5: 30A IR 2mA.
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Voltage Change 1.2V
8 TA = -55C TO 125C
REVERSE VOLTAGE CHANGE (mV)
6 1.2V 4
REVERSE VOLTAGE CHANGE(V)
2V/DIV
0.1 1 10 100
LT1034 * TPC02
2
0
-2 0.01
0.1 1 10 REVERSE CURRENT (mA)
Reverse Dynamic Impedance 1.2V
100 REVERSE DYNAMIC IMPEDANCE ()
REVERSE DYNAMIC IMPEDANCE () 60 50 40 30 20 10
1.2V 10
REVERSE DYNAMIC IMPEDANCE ()
TA = 25C f = 25Hz
1
0.1 0.01
0.1 1 10 REVERSE CURRENT (mA)
UW
LT1034 * TPC01
Reverse Voltage Change 7V
0.4 TA = 25C 0.3 7V 0.2 11 10 8 6 4 2 0 -2 -4 -6 0 -8 -10 100 -0.1 REVERSE CURRENT (mA) -11
0.1Hz to 10Hz Noise 1.2V
0.1
0
1
2
3
4
5
67 1s/DIV
8
9
10 11 12
LT1034 * TPC03
Reverse Dynamic Impedance 2.5V
100
IZ = 100A
Reverse Dynamic Impedance 7V
TA = 25C IZ = 100A
10 1.2V
1
100
LT1034 * TPC04
0 0.01
0.1
1 FREQUENCY (kHz)
10
100
LT1034 * TPC05
0.1 10 100 1k 10k FREQUENCY (Hz) 100k
LT1034 * TPC06
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
3
LT1034-1.2/LT1034-2.5 TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Characteristics 1.2V
16 TA = -55C TO 125C VREF = 1.2V
100
REVERSE CURRENT (A)
REVERSE CURRENT (mA)
12
10
REVERSE CURRENT (A)
8
4
0
0
0.8 0.4 1.2 REVERSE VOLTAGE (V)
Forward Characteristics
1.2 TA = 25C
FORWARD VOLTAGE (V)
VOLTAGE (V)
VOLTAGE (V)
0.8
0.4
0 0.01
0.1
1
10
FORWARD CURRENT (mA)
LT1034 * TPC10
PACKAGE DESCRIPTION
0.209 - 0.219 (5.309 - 5.537) 0.178 - 0.195 (4.521 - 4.953) 0.015 0.500 (0.381) (12.700) MAX MIN 0.036 - 0.046 (0.914 - 1.168)
H Package Metal Can
0.085 - 0.105 (2.159 - 2.667) 0.050 (1.270) TYP 0.100 (2.540) TYP 0.050 (1.270) TYP
45 0.025 (0.635) MAX 0.028 - 0.048 (0.711 - 1.219)
H3(46) 0594
0.016 - 0.019 (0.406 - 0.483) DIA
S8 Package 8-Lead Plastic SO
0.053 - 0.069 (1.346 - 1.752) 0- 8 TYP 0.004 - 0.010 (0.101 - 0.254) 0.228 - 0.244 (5.791 - 6.197)
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254)
0.016 - 0.050 0.406 - 1.270
0.014 - 0.019 (0.355 - 0.483)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
4
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
U
UW
LT1034 * TPC07
Reverse Characteristics 2.5V
100
Reverse Characteristics 7V
TA = -55C TO 125C VREF = 7V
80
60
1
40
0.1
20
1.6
0.01 2.490
2.495
2.500
2.505
2.510
0
0
1
2
REVERSE VOLTAGE (V)
LT1034 * TPC02
345678 REVERSE VOLTAGE (V)
9
10
LT1034 * TPC09
Response Time
8 6 82k 4 2 0 VIN VOUT 7V
1.0
Response Time
OUTPUT
1.5 OUTPUT 36k VIN 0.5 0 VOUT 1.2V
15 0
100
INPUT
5 0
INPUT
0
40 20 TIME (s)
60
80
0
200 100 TIME (s)
300
400
LT1180A * TPC11
LT1180A * TPC12
Dimension in inches (millimeters) unless otherwise noted. Z Package Plastic
0.060 0.005 (1.524 0.127) DIA 0.180 0.005 (4.572 0.127)
FOR 3-LEAD PACKAGE ONLY
0.180 0.005 (4.572 0.127)
0.90 (2.286) NOM
0.189 - 0.197* (4.801 - 5.004) 8 7 6 5
0.500 (12.70) MIN
0.050 UNCONTROLLED (1.270) LEAD DIA MAX
5 NOM
0.020 0.003 (0.508 0.076) 0.016 0.03 (0.406 0.076)
0.015 0.02 (0.381 0.051) 0.060 0.010 (1.524 0.254)
0.150 - 0.157* (3.810 - 3.988)
0.050 0.005 (1.270 0.127)
0.050 (1.270) BSC
0.140 0.010 (3.556 0.127)
1 2 3 4
SO8 0294
10 NOM
Z3 0694
LT/GP 0995 2K REV D * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1995

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