LT1029ACZ#TRPBF [Linear]
LT1029 - 5V Bandgap Reference; Package: TO-92; Pins: 3; Temperature Range: 0°C to 70°C;
| 型号： | LT1029ACZ#TRPBF |
| 厂家： | 
Linear |
| 描述： | LT1029 - 5V Bandgap Reference; Package: TO-92; Pins: 3; Temperature Range: 0°C to 70°C |
| 文件： | 总4页 (文件大小：73K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1029/LT1029A
5V Bandgap Reference
U
FEATURES
DESCRIPTIO
The LT®1029 is a 5V bandgap reference intended for use
in the shunt or “Zener” mode, allowing it to be used as
either a positive or negative reference. The output is
pretrimmedto±0.2%accuracywith20ppm/°Cmaximum
temperature drift. A trim pin allows additional output
adjustment for even more precise output voltage.
■
0.2% Output Tolerance
■
0.6Ω Shunt Impedance
■
700µA to 10mA Operating Current
■
Pin Compatible with LM136-5
■
20ppm/°C Max Drift
■
Output Voltage Trim does not Affect Drift
■
Can be Used as Positive or Negative Reference
OperatingcurrentrangefortheLT1029is700µAto10mA.
Extremely low dynamic impedance allows excellent
output regulation even with fluctuating operating current.
U
APPLICATIO S
The LT1029 will replace an LM136-5 or LM336-5 and
simplify circuits using the “minimum temperature coeffi-
cient” trim network. The LT1029 does not require this
specialnetworktomeetitstemperaturedriftspecification;
these application network components are simply
removed. If output trimming is required for initial
accuracy, the diodes in the trim network should be
replaced with jumpers.
■
A-to-D and D-to-A Converters
■
Precision Regulators
■
Precision Current Sources
V to F and F to V Converters
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Output Voltage Drift
5.015
15V
R1
10k
5.010
5.005
5V
LT1029
5.000
4.995
LT1029
–5V
R2
10k
4.990
4.895
–15V
LT1029 • TA01
–50 –25
0
25
50
75
100 125
TEMPERATURE (°C)
LT1029 • TA02
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1
LT1029/LT1029A
W W
U W
ABSOLUTE AXI U RATI GS
(Note 1)
Reverse Current.................................................... 15mA
Forward Current ................................................... 10mA
Operating Temperature Range
Storage Temperature ............................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LT1029C/LT1029AC ............................... 0°C to 70°C
LT1029M/LT1029AM (OBSOLETE) ....– 55°C to 125°C
U W
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PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
BOTTOM VIEW
+
ADJ
BOTTOM VIEW
LT1029AMH
LT1029MH
LT1029ACH
LT1029CH
LT1029ACZ
LT1029CZ
–
+
–
ADJ
H PACKAGE
TO-46 METAL CAN
Z PACKAGE
TO-92 PLASTIC
T
= 150°C, θ = 440°C/W, θ = 80°C/W
JMAX
JA JC
T
= 100°C, θ = 160°C/W
JMAX
JA
OBSOLETE PACKAGE
Consider the Z Package as an Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ■ denotes the specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reverse Breakdown Voltage
I = 1mA LT1029AM/LT1029AC
4.99
4.95
5.00
5.00
5.01
5.05
V
V
R
LT1029M/LT1029C
Reverse Breakdown Change with Current
Reverse Dynamic Impedance
Temperature Stability
700µA ≤ I ≤ 10mA
2
3
5
8
mV
mV
R
■
■
I = 1mA
R
0.2
0.3
0.6
1.0
Ω
Ω
I = 1mA
R
LT1029AC
LT1029C
LT1029AM
LT1029M
■
■
■
■
3
5
7
7
mV
mV
mV
mV
12
18
36
10
Equivalent Temperature Drift
LT1029AM/LT1029AC
LT1029C
■
■
■
8
12
15
20
34
40
ppm/°C
ppm/°C
ppm/°C
LT1029M
Long Term Stability
Trim Range
20
ppm/kHr
%
±3
+ 5, – 13
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
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2
LT1029/LT1029A
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
1.0
0.9
0.8
0.7
0.6
0.5
T = 25°C
J
0.4
0.3
0.2
0.1
0
T = 125°C
J
T = – 55°C
J
0
4
6
7
1
2
3
5
8
OUTPUT TO GROUND VOLTAGE (V)
LT1029 • TPC01
W U U
APPLICATIO S I FOR ATIO
Output Trimming
U
transient in operating current. A 1µF solid tantalum
capacitor is suggested for most situations where
bypassing is desirable.
Output voltage trimming on the LT1029 is nominally
accomplished with a potentiometer connected from
output to ground with the wiper tied to the trim pin. The
LT1029wasmadecompatiblewithexistingreferences, so
the trim range is large; 5%, – 13%. This large trim range
makes precision trimming rather difficult. One solution is
to insert resistors in series with both ends of the
potentiometer. This has the disadvantage of potentially
poor tracking between the fixed resistors and the
potentiometer. A second method of reducing trim range is
to insert a resistor in series with the wiper of the
potentiometer. This works well only for a very small trim
range because of the mismatch in TCs between the series
resistor and the internal thin film resistors. These film
resistors can have a TC as high as 500ppm/°C. That same
TC is then transferred to the change in output voltage;
a 1% shift in output voltage causes a (500ppm) (1%) =
5ppm/°C change in output voltage drift. The worst case
error in initial output voltage for the LT1029A is 0.2% and
the LT1029 is 1%, so a series resistor is satisfactory if the
output is simply trimmed to nominal value. 1ppm/°C TC
shift would be the maximum expected for the LT1029A
and 5ppm/°C for the LT1029.
Wide Trim Range (5%, – 13%)
+
V
I ≥ 900µA
V
REF
25k
LT1029 • AI01
Narrow Trim Range
+
V
I ≥ 800µA
V
= 5.000V
REF
R1*
100k
TRIM RANGE
0.4% – LT1029A, R1 = 750k
1.2% – LT1029, R1 = 250k
LT1029 • TA02
Trimming Output to 5.120V
+
V
I ≥ 800µA
V
= 5.120V
REF
R1
41.2k
R2
5k
Shunt Capacitance
R3
4.02k
The LT1029 is stable with all values of shunt capacitance,
but values between 300pF and 0.01µF are not recom-
mended because they cause longer settling following a
LT1029 • AI03
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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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
3
LT1029/LT1029A
W U U
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APPLICATIO S I FOR ATIO
Split ±2.5V References
2.5V
R1
25k
5V
0.1%
–
+
LT1029
LT1001
– 5V
R2
25k
0.1%
– 2.5V
R3
1k
5%
– 5V
LT1029 • AI04
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PACKAGE DESCRIPTIO
H Package
2-Lead and 3-Lead TO-46 Metal Can
(Reference LTC DWG # 05-08-1340)
.209 – .219
(5.309 – 5.537)
.178 – .195
.100
(2.540)
TYP
.050
(1.270)
TYP
.050
(1.270)
TYP
.085 – .105
(2.159 – 2.667)
(4.521 – 4.953)
PIN 1
.500
(12.700)
MIN
FOR 3-LEAD PACKAGE ONLY
REFERENCE
PLANE
45°
SEATING*
PLANE
.028 – .048
(0.711 – 1.219)
H02/03(TO-46) 0801
.036 – .046
(0.914 – 1.168)
.025
(0.635)
MAX
.016 – .019**
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND .050" BELOW THE REFERENCE PLANE
.016 – .024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
(0.406 – 0.483)
DIA
OBSOLETE PACKAGE
Z Package
3-Lead Plastic TO-92 (Similar to TO-226)
(Reference LTC DWG # 05-08-1330)
.180 ± .005
(4.572 ± 0.127)
.060 ± .010
(1.524 ± 0.254)
.060 ± .005
(1.524± 0.127)
DIA
.90
(2.286)
NOM
.140 ± .010
(3.556 ± 0.127)
3
2
1
.180 ± .005
(4.572 ± 0.127)
5°
NOM
10° NOM
TO-92 TAPE AND REEL
.500
(12.70)
MIN
.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
REFER TO TAPE AND REEL SECTION OF
LTC DATA BOOK FOR ADDITIONAL INFORMATION
.015 ± .002
(0.381 ± 0.051)
Z3 (TO-92) 0801
.016 ± .003
(0.406 ± 0.076)
.050
(1.27)
BSC
.098 +.016/–.04
(2.5 +0.4/–0.1)
2 PLCS
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LT/TP 1102 1K REV A • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
4
■
■
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 1985
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