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Электронный компонент: LT1021BMH-5

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1
LT1021
Precision Reference
Typical Distribution of Temperature Drift
OUTPUT DRIFT (ppm/
C)
5
UNITS (%)
24
21
18
15
12
9
6
3
0
3
1021 TA01
3
1
1
5
2
4
2
0
4
DISTRIBUTION
OF THREE RUNS
U
A
O
PPLICATI
TYPICAL
Basic Positive and Negative Connections
LT1021
OUT
IN
GND
LT1021
(7 AND 10 ONLY)
OUT
IN
GND
V
OUT
V
OUT
V
IN
NC
R1 =
V
OUT
(V
)
I
LOAD
+ 1.5mA
15V
(V
)
R1
1021 TA01
s
Pin Compatible with Most Bandgap Reference
Applications, Including Ref 01, Ref 02, LM368,
MC1400 and MC1404 with Greatly Improved
Stability, Noise and Drift
s
Ultralow Drift: 5ppm/
C Max Slope
s
Trimmed Output Voltage
s
Operates in Series or Shunt Mode
s
Output Sinks and Sources in Series Mode
s
Very Low Noise: <1ppm
P-P
(0.1Hz to 10Hz)
s
>100dB Ripple Rejection
s
Minimum Input/Output Differential of 1V
s
100% Noise Tested
U
S
A
O
PPLICATI
s
A/D and D/A Converters
s
Precision Regulators
s
Digital Voltmeters
s
Inertial Navigation Systems
s
Precision Scales
s
Portable Reference Standard
, LTC and LT are registered trademarks of Linear Technology Corporation.
D
U
ESCRIPTIO
The LT
1021 is a precision reference with ultralow drift
and noise, extremely good long term stability and almost
total immunity to input voltage variations. The reference
output will both source and sink up to 10mA. Three
voltages are available: 5V, 7V and 10V. The 7V and 10V
units can be used as shunt regulators (two-terminal zeners)
with the same precision characteristics as the three-
terminal connection. Special care has been taken to mini-
mize thermal regulation effects and temperature
induced hysteresis.
The LT1021 references are based on a buried zener diode
structure that eliminates noise and stability problems
associated with surface breakdown devices. Further, a
subsurface zener exhibits better temperature drift and
time stability than even the best bandgap references.
Unique circuit design makes the LT1021 the first IC
reference to offer ultralow drift without the use of high
power on-chip heaters.
The LT1021-7 uses no resistive divider to set output
voltage, and therefore exhibits the best long term stability
and temperature hysteresis. The LT1021-5 and LT1021-
10 are intended for systems requiring a precise 5V or 10V
reference with an initial tolerance as low as
0.05%.
S
FEATURE
2
LT1021
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
Input Voltage .......................................................... 40V
Input/Output Voltage Differential ............................ 35V
Output-to-Ground Voltage (Shunt Mode Current Limit)
LT1021-5 ............................................................. 10V
LT1021-7 ............................................................. 10V
LT1021-10 ........................................................... 16V
Trim Pin-to-Ground Voltage
Positive ............................................... Equal to V
OUT
Negative ........................................................... 20V
Output Short-Circuit Duration
V
IN
= 35V ......................................................... 10 sec
V
IN
20V ................................................... Indefinite
Operating Temperature Range
Commercial ............................................ 0
C to 70
C
Industrial ........................................... 40
C to 85
C
Military ............................................ 55
C to 125
C
Storage Temperature Range ................ 65
C to 150
C
Lead Temperature (Soldering, 10 sec) ................ 300
C
W
U
U
PACKAGE/ORDER I FOR ATIO
LT1021BCH-5
LT1021BMH-5
LT1021CCH-5
LT1021CMH-5
LT1021DCH-5
LT1021DMH-5
LT1021BCH-7
LT1021BMH-7
LT1021DCH-7
LT1021DMH-7
LT1021BCH-10
LT1021BMH-10
LT1021CCH-10
LT1021CMH-10
LT1021DCH-10
LT1021DMH-10
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1021BCN8-5
LT1021CCN8-5
LT1021CIN8-5
LT1021DCN8-5
LT1021DIN8-5
LT1021DCS8-5
LT1021BCN8-7
LT1021DCN8-7
LT1021DCS8-7
LT1021BCN8-10
LT1021CCN8-10
LT1021CIN8-10
LT1021DCN8-10
LT1021DCS8-10
LT1021DIN8-10
S8 PART MARKING
021DC5
021DC7
021DC1
T
JMAX
= 150
C,
JA
= 150
C/W,
JC
= 45
C/W
TOP VIEW
NC*
NC*
NC*
V
IN
V
OUT
TRIM**
NC*
GND
8
7
6
5
3
2
1
4
H PACKAGE
8-LEAD TO-5 METAL CAN
CONNECTED INTERNALLY.
D0 NOT CONNECT EXTERNAL
CIRCUITRY TO THESE PINS
NO TRIM PIN ON LT1021-7.
DO NOT CONNECT EXTERNAL
CIRCUITRY TO PIN 5 ON LT1021-7
*
**
T
JMAX
= 130
C,
JA
= 130
C/W (N)
T
JMAX
= 130
C,
JA
= 150
C/W (S)
(Note 1)
1
2
3
4
8
7
6
5
TOP VIEW
DNC*
V
IN
DNC*
GND
DNC*
DNC*
V
0UT
TRIM**
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
CONNECTED INTERNALLY.
D0 NOT CONNECT EXTERNAL
CIRCUITRY TO THESE PINS
NO TRIM PIN ON LT1021-7.
DO NOT CONNECT EXTERNAL
CIRCUITRY TO PIN 5 ON LT1021-7
*
**
3
LT1021
ELECTRICAL C
C
HARA TERISTICS
LT1021-5
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Note 2)
LT1021C-5
4.9975
5.000
5.0025
V
LT1021B-5/LT1021D-5
4.9500
5.000
5.0500
V
Output Voltage Temperature Coefficient (Note 3)
T
MIN
T
J
T
MAX
LT1021B-5
q
2
5
ppm/
C
LT1021C-5/LT1021D-5
q
3
20
ppm/
C
Line Regulation (Note 4)
7.2V
V
IN
10V
4
12
ppm/V
q
20
ppm/V
10V
V
IN
40V
2
6
ppm/V
q
10
ppm/V
Load Regulation (Sourcing Current)
0
I
OUT
10mA
10
20
ppm/mA
(Note 4)
q
35
ppm/mA
Load Regulation (Sinking Current)
0
I
OUT
10mA
60
100
ppm/mA
(Note 4)
q
150
ppm/mA
Supply Current
0.8
1.2
mA
q
1.5
mA
Output Voltage Noise (Note 6)
0.1Hz
f
10Hz
3.0
V
P-P
10Hz
f
1kHz
2.2
3.5
V
RMS
Long Term Stability of Output Voltage (Note 7)
t = 1000Hrs Noncumulative
15
ppm
Temperature Hysteresis of Output
T =
25
C
10
ppm
LT1021-7
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Note 2)
6.95
7.00
7.05
V
Output Voltage Temperature Coefficient (Note 3)
T
MIN
T
J
T
MAX
LT1021B-7
q
2
5
ppm/
C
LT1021D-7
q
3
20
ppm/
C
Line Regulation (Note 4)
8.5V
V
IN
12V
1.0
4
ppm/V
q
2.0
8
ppm/V
12V
V
IN
40V
0.5
2
ppm/V
q
1.0
4
ppm/V
Load Regulation (Sourcing Current)
0
I
OUT
10mA
12
25
ppm/mA
(Note 4)
q
40
ppm/mA
Load Regulation (Shunt Mode)
1.2mA
I
SHUNT
10mA
50
100
ppm/mA
(Notes 4, 5)
q
150
ppm/mA
Supply Current (Series Mode)
0.75
1.2
mA
q
1.5
mA
Minimum Current (Shunt Mode)
V
IN
is Open
0.7
1.0
mA
q
1.2
mA
Output Voltage Noise (Note 6)
0.1Hz
f
10Hz
4.0
V
P-P
10Hz
f
1kHz
2.5
4.0
V
RMS
Long Term Stability of Output Voltage (Note 7)
t = 1000Hrs Noncumulative
7
ppm
Temperature Hysteresis of Output
T =
25
C
3
ppm
The
q
denotes specifications that apply over the full operating temperature
range, otherwise specifications are T
A
= 25
C. V
IN
= 10V, I
OUT
= 0, unless otherwise noted.
The
q
denotes specifications that apply over the full operating temperature range, otherwise specifications are T
A
= 25
C.
V
IN
= 12V, I
OUT
= 0, unless otherwise noted.
4
LT1021
ELECTRICAL C
C
HARA TERISTICS
LT1021-10
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Note 2)
LT1021C-10
9.995
10.00
10.005
V
LT1021B-10/LT1021D-10
9.950
10.00
10.050
V
Output Voltage Temperature Coefficient (Note 3)
T
MIN
T
J
T
MAX
LT1021B-10
q
2
5
ppm/
C
LT1021C-10/LT1021D-10
q
5
20
ppm/
C
Line Regulation (Note 4)
11.5V
V
IN
14.5V
1.0
4
ppm/V
q
6
ppm/V
14.5V
V
IN
40V
0.5
2
ppm/V
q
4
ppm/V
Load Regulation (Sourcing Current)
0
I
OUT
10mA
12
25
ppm/mA
(Note 4)
q
40
ppm/mA
Load Regulation (Shunt Mode)
1.7mA
I
SHUNT
10mA
50
100
ppm/mA
(Notes 4, 5)
q
150
ppm/mA
Supply Current (Series Mode)
1.2
1.7
mA
q
2.0
mA
Minimum Current (Shunt Mode)
V
IN
is Open
1.1
1.5
mA
q
1.7
mA
Output Voltage Noise (Note 6)
0.1Hz
f
10Hz
6.0
V
P-P
10Hz
f
1kHz
3.5
6
V
RMS
Long Term Stability of Output Voltage (Note 7)
t = 1000Hrs Noncumulative
15
ppm
Temperature Hysteresis of Output
T =
25
C
5
ppm
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Output voltage is measured immediately after turn-on. Changes
due to chip warm-up are typically less than 0.005%.
Note 3: Temperature coefficient is measured by dividing the change in
output voltage over the temperature range by the change in temperature.
Separate tests are done for hot and cold; T
MIN
to 25
C and 25
C to T
MAX
.
Incremental slope is also measured at 25
C.
Note 4: Line and load regulation are measured on a pulse basis. Output
changes due to die temperature change must be taken into account
separately. Package thermal resistance is 150
C/W for TO-5 (H), 130
C/W
for N and 150
C/W for the SO-8.
Note 5: Shunt mode regulation is measured with the input open. With the
input connected, shunt mode current can be reduced to 0mA. Load
regulation will remain the same.
Note 6: RMS noise is measured with a 2-pole highpass filter at 10Hz and a
2-pole lowpass filter at 1kHz. The resulting output is full-wave rectified and
then integrated for a fixed period, making the final reading an average as
opposed to RMS. Correction factors are used to convert from average to
RMS and correct for the non-ideal bandpass of the filters.
Peak-to-peak noise is measured with a single highpass filter at 0.1Hz and a
2-pole lowpass filter at 10Hz. The unit is enclosed in a still-air environment
to eliminate thermocouple effects on the leads. Test time is 10 seconds.
Note 7: Consult factory for units with long term stability data.
The
q
denotes specifications that apply over the full operating temperature
range, otherwise specifications are T
A
= 25
C. V
IN
= 15V, I
OUT
= 0, unless otherwise noted.
5
LT1021
C
C
HARA TERISTICS
U
W
A
TYPICAL PERFOR
CE
Start-Up (Series Mode)
Ripple Rejection
INPUT VOLTAGE (V)
0
85
REJECTION (dB)
90
95
100
105
10
20
30
40
LT1021 G01
110
115
5
15
25
35
f = 150Hz
LT1021-5
LT1021-10
LT1021-7
TIME (
s)
3
OUTPUT VOLTAGE (V)
4
6
7
8
13
10
2
6
8
LT1021 G04
5
11
12
9
0
4
10
12
14
LT1021-10
LT1021-5
LT1021-7
V
IN
= 0V TO 12V
Output Voltage Noise Spectrum
OUTPUT CURRENT (mA)
0
INPUT/OUTPUT VOLTAGE (V)
1.2
1.6
16
1021 G03
0.8
0.4
0
4
8
12
20
1.0
1.4
0.6
0.2
14
2
6
10
18
T
J
= 125
C
T
J
= 55
C
T
J
= 25
C
FREQUENCY (Hz)
100
NOISE VOLTAGE (nV/
Hz)
200
250
350
400
10
1k
10k
LT1021 G06
0
100
300
150
50
LT1021-10
LT1021-5
LT1021-7
Ripple Rejection
FREQUENCY (Hz)
10
90
REJECTION (dB)
110
130
120
100
80
60
100
1k
10k
LT1021 G02
70
50
V
IN
= 15V
C
OUT
= 0
LT1021-5
LT1021-10
LT1021-7
Start-Up (Shunt Mode)
LT1021-7, LT1021-10
TIME (
s)
OUTPUT VOLTAGE (V)
9
10
11
4
8
LT1021 G05
8
7
0
2
6
10
12
6
5
LT1021-10
LT1021-7
IN
GND
OUT
NC
1k
V
OUT
0V
V
OUT
+ 2V
BANDWIDTH (Hz)
10
8
RMS NOISE (
V)
12
16
14
10
6
2
100
1k
10k
LT1021 G07
4
0
C
OUT
= 0
FILTER = 1 POLE
f
LOW
= 0.1Hz
LT1021-10
LT1021-5
LT1021-7
Output Voltage Temperature Drift
LT1021-5
Output Voltage Noise
TEMPERATURE (
C)
50
4.994
4.996
OUTPUT VOLTAGE (V)
5.000
5.006
0
50
75
LT1021 G08
4.998
5.004
5.002
25
25
100
125
Load Regulation LT1021-5
OUTPUT CURRENT (mA)
10
OUTPUT CHANGE (mV)
1
3
5
4
2
0
2
4
6
LT1021 G09
1
3
5
6
8
4
0
4
8
2
2
10
V
IN
= 8V
SOURCING
SINKING
Minimum Input/Output Differential
LT1021-7, LT1021-10