1
LT1034-1.2/LT1034-2.5
1034fe
FEATURES
DESCRIPTIO
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APPLICATIO S
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Micropower Dual
Reference
■
Guaranteed 20 ppm/
°
C Drift
■
Guaranteed 40 ppm/
°
C Drift (SO-8 Package)
■
20
µ
A to 20mA Operation (1.2V)
■
Dynamic Impedance: 1Ω
■
7V, 100µA Reference
The LT
®
1034 is a micropower, precision 1.2V/2.5 refer-
ence combined with a 7V auxiliary reference. The 1.2V/2.5V
reference is a trimmed, thin-film, band-gap, voltage refer-
ence with 1% initial tolerance and guaranteed 20ppm/°C
temperature drift. Operating on only 20µA, the LT1034
offers guaranteed drift, low temperature cycling hyster-
esis and good long-term stability. The low dynamic im-
pedance 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.
■
Portable Meters
■
Precision Regulators
■
Calibrators
Temperature Drift LT1034CS8-1.2
TEMPERATURE (°C)
–50
REVERSE VOLTAGE CHANGE (mV)
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5 050 75
LT1034 • TPC02
–25 25 100 125
15V
7V OUTPUT 1.2V OR 2.5V
OUTPUT
50k
7V
500k
1.225V
OR 2.500V
LT1034 • TA01
TYPICAL APPLICATIO
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2
LT1034-1.2/LT1034-2.5
1034fe
Operating Current ................................................. 20mA
Forward Current (Note 2) ..................................... 20mA
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ABSOLUTE MAXIMUM RATINGS
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WW
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Operating Temperature
Commercial ............................................. 0° to 70°C
Industrial .......................................... –40°C to 85°C
Military (OBSOLETE) ................. –55°C to 125°C
ORDER PART
NUMBER
LT1034CS8-1.2
LT1034CS8-2.5
LT1034IS8-1.2
LT1034IS8-2.5
BOTTOM VIEW
H PACKAGE
3-LEAD TO-46 METAL CAN
7V
1.2V
T
JMAX
= 150°C, θ
JA
= 440°C/W,
θ
JC
= 80°C/W
1
2
3
4
8
7
6
5
TOP VIEW
2.5V
NC
2.5V
7V
NC
NC
NC
GND
S8 PACKAGE
8-LEAD PLASTIC SO
LT1034BCH-1.2
LT1034BCH-2.5
LT1034BMH-1.2
LT1034BMH-2.5
LT1034CH-1.2
LT1034CH-2.5
LT1034MH-1.2
LT1034MH-2.5
PACKAGE/ORDER INFORMATION
W
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ORDER PART NUMBER
T
JMAX
= 175°C, θ
JA
= 150°C/ W
T
JMAX
= 100°C, θ
JA
= 160°C/ W
BOTTOM VIEW
Z PACKAGE
3-LEAD TO-92 PLASTIC
7V
1.2V
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
PART MARKING
3401
3402
1034I12
34I02
(Note 1)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
OBSOLETE PACKAGE
Consider the Z Package for Alternate Source
3
LT1034-1.2/LT1034-2.5
1034fe
PARAMETER CONDITIONS MIN TYP MAX UNITS
Reverse Breakdown Voltage I
R
= 100µA 6.80 7.0 7.3 V
●6.75 7.0 7.4 V
Reverse Breakdown Change 100µA ≤ I
R
≤ 1mA 90 140 mV
with Current 100µA ≤ I
R
≤ 1mA ●100 190 mV
1mA ≤ I
R
≤ 20mA 160 250 mV
1mA ≤ I
R
≤ 20mA ●200 350 mV
Temperature Coefficient I
R
= 100µA●40 ppm/°C
Long-Term Stability I
R
= 100µA 20 ppm/√khrs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Forward biasing either diode will affect the operation of the other
diode.
Note 3: This parameter guaranteed by “reverse breakdown change with
current” test.
Note 4: For the LT1034-1.2: 20µA ≤ I
R
≤ 2mA. For the LT1034-2.5:
30µA ≤ I
R
≤ 2mA.
LT1034-1.2 LT1034-2.5
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Reverse Breakdown Voltage I
R
= 100µA 1.210 1.225 1.240 2.46 2.5 2.54 V
●1.205 1.225 1.245 2.43 2.5 2.57 V
Reverse Breakdown Change (Note 4) 0.5 2.0 1.0 3.0 mV
with Current ●1.0 4.0 1.5 6.0 mV
2mA ≤ I
R
≤ 20mA 4.0 8.0 6.0 16.0 mV
●6.0 15.0 10.0 20.0 mV
Minimum Operating Current ●10 20 15 30 µA
Temperature Coefficient I
R
= 100µA LT1034B ●10 20 10 20 ppm/°C
LT1034 20 40 20 40 ppm/°C
Reverse Dynamic Impedance (Note 3) I
R
= 100µA 0.25 1.0 0.5 1.5 Ω
●0.50 2.0 1.0 2.5 Ω
Low Frequency Noise I
R
= 100µA, 0.1Hz ≤ F ≤ 10Hz ●46µV
P-P
Long-Term Stability I
R
= 100µA 20 20 ppm/√khrs
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
7V Reference.
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LT1034-1.2/LT1034-2.5
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TYPICAL PERFORMANCE CHARACTERISTICS
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0.1Hz to 10Hz Noise 1.2VReverse Voltage Change 7VReverse Voltage Change 1.2V
REVERSE CURRENT (mA)
0
REVERSE VOLTAGE CHANGE (mV)
2
4
6
8
0.01 1 10 100
LT1034 • TPC01
–2 0.1
T
A
= –55°C TO 125°C
1.2V
REVERSE CURRENT (mA)
0.1
–0.1
REVERSE VOLTAGE CHANGE(V)
0.2
0.3
0.4
1 10 100
LT1034 • TPC02
0.1
0
T
A
= 25°C
7V
1s/DIV
0
–11
2µV/DIV
–8
–4
0
4
11
2468
LT1034 • TPC03
10 12135 7911
8
–10
–6
–2
2
10
6
Reverse Dynamic Impedance 7V
Reverse Dynamic Impedance 2.5VReverse Dynamic Impedance 1.2V
FREQUENCY (kHz)
REVERSE DYNAMIC IMPEDANCE (Ω)
60
50
40
30
20
10
0
0.01 1 10 100
LT1034 • TPC05
0.1
I
Z
= 100µA
REVERSE CURRENT (mA)
1
REVERSE DYNAMIC IMPEDANCE (Ω)
10
0.01 1 10 100
LT1034 • TPC04
0.1 0.1
100
1.2V
TA = 25°C
f = 25Hz
FREQUENCY (Hz)
1
REVERSE DYNAMIC IMPEDANCE (Ω)
10
10 1k 10k 100k
LT1034 • TPC06
0.1 100
100
T
A
= 25°C
I
Z
= 100µA
1.2V
5
LT1034-1.2/LT1034-2.5
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TYPICAL PERFORMANCE CHARACTERISTICS
UW
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (µA)
8
12
1.6
LT1034 • TPC07
4
00.4 0.8 1.2
16
T
A
= –55°C TO 125°C
V
REF
= 1.2V
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (µA)
100
80
60
40
20
08
LT1034 • TPC09
213579
4610
T
A
= –55°C TO 125°C
V
REF
= 7V
REVERSE VOLTAGE (V)
REVERSE CURRENT (mA)
100
10
1
0.1
0.01
2.490 2.500 2.505 2.510
LT1034 • TPC02
2.495
Reverse Characteristics 7VReverse Characteristics 2.5VReverse Characteristics 1.2V
Response TimeResponse TimeForward Characteristics
FORWARD CURRENT (mA)
0.01
0
FORWARD VOLTAGE (V)
0.8
1.2
0.1 1 10 100
LT1034 • TPC10
0.4
T
A
= 25°C
TIME (µs)
VOLTAGE (V)
8
6
4
2
0
15
060
LT1180A • TPC11
020 40 80
OUTPUT
INPUT
V
IN
V
OUT
82k
7V
TIME (µs)
VOLTAGE (V)
1.5
1.0
0.5
0
5
0300
LT1180A • TPC12
0100 200 400
OUTPUT
INPUT
V
IN
V
OUT
36k
1.2V
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LT1034-1.2/LT1034-2.5
1034fe
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PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (.200 Inch PCD)
(Reference LTC DWG # 05-08-1320)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
0.016 – 0.050
(0.406 – 1.270)
0.010 – 0.020
(0.254 – 0.508)× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 1298
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
1234
0.150 – 0.157**
(3.810 – 3.988)
8765
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
45°
0.016 – 0.021**
(0.406 – 0.533)
DIA
0.025
(0.635)
MAX
0.085 – 0.105
(2.159 – 2.667)
0.500
(12.700)
MIN
0.178 – 0.195
(4.521 – 4.953)
0.209 – 0.219
(5.309 – 5.537) 0.100
(2.540)
TYP
H02/03(TO-46) 1098
0.050
(1.270)
TYP
0.050
(1.270)
TYP
0.028 – 0.048
(0.711 – 1.219)
0.036 – 0.046
(0.914 – 1.168)
FOR 3-LEAD PACKAGE ONLY
REFERENCE
PLANE *
LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS 0.016 – 0.024
(0.406 – 0.610)
*
**
PIN 1
OBSOLETE PACKAGE
7
LT1034-1.2/LT1034-2.5
1034fe
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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PACKAGE DESCRIPTIO
Z Package
3-Lead Plastic TO-92 (Similar to TO-226)
(Reference LTC DWG # 05-08-1410)
0.050
(1.27)
BSC
0.060 ± 0.005
(1.524± 0.127)
DIA
0.90
(2.286)
NOM
0.180 ± 0.005
(4.572 ± 0.127)
0.180 ± 0.005
(4.572 ± 0.127)
0.500
(12.70)
MIN
0.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
0.016 ± 0.003
(0.406 ± 0.076)
5°
NOM
0.015 ± 0.002
(0.381 ± 0.051)
0.060 ± 0.010
(1.524 ± 0.254)
10° NOM
0.140 ± 0.010
(3.556 ± 0.127)
Z3 (TO-92) 0401
0.098 +016/–0.04
(2.5 +0.4/–0.1)
2 PLCS
TO-92 TAPE AND REEL
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATION
8
LT1034-1.2/LT1034-2.5
1034fe
LT/CPI 0102 1.5K REV E • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY COR PORATION 1995
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PART NUMBER DESCRIPTION COMMENTS
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LT1019 Precision Series or Shunt Band-Gap Low Dropout, Multiple Output Options
LT1236 Precision Series or Shunt Buried Zener Low Noise, Low Power, Multiple Output Options
