1
LT1034-1.2/LT1034-2.5
Micropower Dual
Reference
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1004
Low Cost Precision Band-Gap
Micropower, SO-8, Industrial Temperature Options
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
s
Guaranteed 20 ppm/
°
C Drift
(H Package and Z Package)
s
Guaranteed 40 ppm/
°
C Drift (SO-8 Package)
s
20
µ
A to 20mA Operation (1.2V)
s
Dynamic Impedance: 1
s
7V, 100
µ
A 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 20
µ
A, 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.
FEATURES
DESCRIPTIO
N
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
Portable Meters
s
Precision Regulators
s
Calibrators
APPLICATIO
N
S
U
TYPICAL APPLICATIO
N
A
N
D BLOCK DIAGRA
M
U
U
W
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
0
50
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
2
LT1034-1.2/LT1034-2.5
Operating Current ................................................. 20mA
Forward Current (Note 1)...................................... 20mA
Storage Temperature Range ................. 65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec).................. 300
°
C
ABSOLUTE
M
AXI
M
U
M
RATINGS
W
W
W
U
Operating Temperature
Commercial ............................................. 0
°
to 70
°
C
Industrial .......................................... 40
°
C to 85
°
C
Military ........................................... 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,
JA
= 440
°
C/ W,
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 I
N
FOR
M
ATIO
N
W
U
U
ORDER PART NUMBER
T
JMAX
= 175
°
C,
JA
= 150
°
C/ W
T
JMAX
= 100
°
C,
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
LT1034-1.2
LT1034-2.5
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
I
R
= 100
µ
A
1.210 1.225
1.240
2.46
2.5
2.54
V
q
1.205 1.225
1.245
2.43
2.5
2.57
V
Reverse Breakdown Change
Note 3
0.5
2.0
1.0
3.0
mV
with Current
q
1.0
4.0
1.5
6.0
mV
2mA
I
R
20mA
4.0
8.0
6.0
16.0
mV
q
6.0
15.0
10.0
20.0
mV
Minimum Operating Current
q
10
20
15
30
µ
A
Temperature Coefficient
I
R
= 100
µ
A
LT1034B
q
10
20
10
20
ppm/
°
C
LT1034
20
40
20
40
ppm/
°
C
Reverse Dynamic Impedance (Note 2)
I
R
= 100
µ
A
0.25
1.0
0.5
1.5
q
0.50
2.0
1.0
2.5
Low Frequency Noise
I
R
= 100
µ
A, 0.1Hz
F
10Hz
q
4
6
µ
V
P-P
Long-Term Stability
I
R
= 100
µ
A
20
20
ppm
khrs
ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, unless otherwise specified.
PART MARKING
3401
3402
34I01
34I02
3
LT1034-1.2/LT1034-2.5
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
I
R
= 100
µ
A
6.80
7.0
7.3
V
q
6.75
7.0
7.4
V
Reverse Breakdown Change
100
µ
A
I
R
1mA
90
140
mV
with Current
100
µ
A
I
R
1mA
q
100
190
mV
1mA
I
R
20mA
160
250
mV
1mA
I
R
20mA
q
200
350
mV
Temperature Coefficient
I
R
= 100
µ
A
q
40
ppm/
°
C
Long-Term Stability
I
R
= 100
µ
A
20
ppm
khrs
7V Reference. T
A
= 25
°
C, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
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: 20
µ
A
I
R
2mA. For the LT1034-2.5:
30
µ
A
I
R
2mA.
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
0.1Hz to 10Hz Noise 1.2V
Reverse Voltage Change 7V
Reverse 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
2
µ
V/DIV
8
4
0
4
11
2
4
6
8
LT1034 · TPC03
10
12
1
3
5
7
9
11
8
10
6
2
2
10
6
Reverse Dynamic Impedance 7V
Reverse Dynamic Impedance 2.5V
Reverse Dynamic Impedance 1.2V
FREQUENCY (kHz)
REVERSE DYNAMIC IMPEDANCE (
)
60
50
40
30
20
10
0
0.01
1
10
100
LT1034 · TPC05
0.1
I
Z
= 100
µ
A
REVERSE CURRENT (mA)
1
REVERSE DYNAMIC IMPEDANCE (
)
10
0.01
1
10
100
LT1034 · TPC04
0.1
0.1
100
1.2V
T
A
= 25
°
C
f = 25Hz
FREQUENCY (Hz)
1
REVERSE DYNAMIC IMPEDANCE (
)
10
10
1k
10k
100k
LT1034 · TPC06
0.1
100
100
T
A
= 25
°
C
I
Z
= 100
µ
A
1.2V
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.
4
LT1034-1.2/LT1034-2.5
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (
µ
A)
8
12
1.6
LT1034 · TPC07
4
0
0.4
0.8
1.2
16
T
A
= 55
°
C TO 125
°
C
V
REF
= 1.2V
REVERSE VOLTAGE (V)
0
REVERSE CURRENT (
µ
A)
100
80
60
40
20
0
8
LT1034 · TPC09
2
1
3
5
7
9
4
6
10
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 7V
Reverse Characteristics 2.5V
Reverse Characteristics 1.2V
Response Time
Response Time
Forward 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 (
µ
s)
VOLTAGE (V)
8
6
4
2
0
15
0
60
LT1180A · TPC11
0
20
40
80
OUTPUT
INPUT
V
IN
V
OUT
82k
7V
TIME (
µ
s)
VOLTAGE (V)
1.5
1.0
0.5
0
5
0
300
LT1180A · TPC12
0
100
200
400
OUTPUT
INPUT
V
IN
V
OUT
36k
1.2V
PACKAGE DESCRIPTIO
N
U
Dimension in inches (millimeters) unless otherwise noted.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
LT/GP 0995 2K REV D · PRINTED IN USA
©
LINEAR TECHNOLOGY CORPORATION 1995
0.016 0.019
(0.406 0.483)
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
45
°
H3(46) 0594
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)
0.015
(0.381)
MAX
FOR 3-LEAD PACKAGE ONLY
Z Package
Plastic
H Package
Metal Can
0.050
±
0.005
(1.270
±
0.127)
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 DIA
0.020
±
0.003
(0.508
±
0.076)
0.016
±
0.03
(0.406
±
0.076)
5
°
NOM
0.015
±
0.02
(0.381
±
0.051)
0.060
±
0.010
(1.524
±
0.254)
10
°
NOM
0.140
±
0.010
(3.556
±
0.127)
Z3 0694
1
2
3
4
0.150 0.157*
(3.810 3.988)
8
7
6
5
0.189 0.197*
(4.801 5.004)
0.228 0.244
(5.791 6.197)
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 0294
0.053 0.069
(1.346 1.752)
0.014 0.019
(0.355 0.483)
0.004 0.010
(0.101 0.254)
0.050
(1.270)
BSC
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
S8 Package
8-Lead Plastic SO
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