LT1034-1.2/LT1034-2.5
Micropower Dual
Reference
FEATURES
s
s
s
s
s
DESCRIPTION
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.
Guaranteed 20 ppm/
°
C Drift
(H Package and Z Package)
Guaranteed 40 ppm/
°
C Drift (SO-8 Package)
20
µ
A to 20mA Operation (1.2V)
Dynamic Impedance: 1Ω
7V, 100µA 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
U U
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 ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Operating Temperature
Commercial ............................................. 0° to 70°C
Industrial .......................................... – 40°C to 85°C
Military ........................................... – 55°C to 125°C
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
T
JMAX
= 150°C,
θ
JA
= 440°C/ W,
θ
JC
= 80°C/ W
BOTTOM VIEW
1.2V
7V
Z PACKAGE
3-LEAD TO-92 PLASTIC
T
JMAX
= 100°C,
θ
JA
= 160°C/ W
ELECTRICAL CHARACTERISTICS
PARAMETER
Reverse Breakdown Voltage
Reverse Breakdown Change
with Current
CONDITIONS
I
R
= 100µA
T
A
= 25°C, 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
LT1034-2.5
MIN
TYP
MAX
2.46
2.5
2.54
2.43
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
µA
ppm/°C
ppm/°C
Ω
Ω
µV
P-P
ppm√khrs
Note 3
q
2mA
≤
I
R
≤
20mA
q
Minimum Operating Current
Temperature Coefficient
Reverse Dynamic Impedance (Note 2)
Low Frequency Noise
Long-Term Stability
I
R
= 100µA
I
R
= 100µA
LT1034B
LT1034
I
R
= 100µA, 0.1Hz
≤
F
≤
10Hz
I
R
= 100µA
2
U
U
W
W W
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
T
JMAX
= 175°C,
θ
JA
= 150°C/ W
q
q
q
q
q
LT1034-1.2/LT1034-2.5
ELECTRICAL CHARACTERISTICS
PARAMETER
Reverse Breakdown Voltage
Reverse Breakdown Change
with Current
CONDITIONS
I
R
= 100µA
100µA
≤
I
R
≤
1mA
100µA
≤
I
R
≤
1mA
1mA
≤
I
R
≤
20mA
1mA
≤
I
R
≤
20mA
I
R
= 100µA
I
R
= 100µA
7V Reference. T
A
= 25°C, 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
ppm√khrs
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: 20µA
≤
I
R
≤
2mA. For the LT1034-2.5:
30µA
≤
I
R
≤
2mA.
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Voltage Change 1.2V
8
T
A
= –55°C TO 125°C
REVERSE VOLTAGE CHANGE (mV)
6
1.2V
4
REVERSE VOLTAGE CHANGE(V)
2µV/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 (Ω)
REVERSE DYNAMIC IMPEDANCE (Ω)
60
50
40
30
20
10
1.2V
10
REVERSE DYNAMIC IMPEDANCE (Ω)
T
A
= 25°C
f = 25Hz
1
0.1
0.01
0.1
1
10
REVERSE CURRENT (mA)
U W
LT1034 • TPC01
Reverse Voltage Change 7V
0.4
T
A
= 25°C
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
6 7
1s/DIV
8
9
10 11 12
LT1034 • TPC03
Reverse Dynamic Impedance 2.5V
100
I
Z
= 100µA
Reverse Dynamic Impedance 7V
T
A
= 25°C
I
Z
= 100µA
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 represen-
tation 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
T
A
= –55°C TO 125°C
V
REF
= 1.2V
100
REVERSE CURRENT (µA)
REVERSE CURRENT (mA)
12
10
REVERSE CURRENT (µA)
8
4
0
0
0.8
0.4
1.2
REVERSE VOLTAGE (V)
Forward Characteristics
1.2
T
A
= 25°C
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
×
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
U W
LT1034 • TPC07
Reverse Characteristics 2.5V
100
Reverse Characteristics 7V
T
A
= –55°C TO 125°C
V
REF
= 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
3 4 5 6 7 8
REVERSE VOLTAGE (V)
9
10
LT1034 • TPC09
Response Time
8
6
82k
4
2
0
V
IN
V
OUT
7V
1.0
Response Time
OUTPUT
1.5
OUTPUT
36k
V
IN
0.5
0
V
OUT
1.2V
15
0
100
INPUT
5
0
INPUT
0
40
20
TIME (µs)
60
80
0
200
100
TIME (µs)
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
©
LINEAR TECHNOLOGY CORPORATION 1995
