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LT1021 の電気的特性と機能
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LT1021のメーカーはLinear Technologyです、この部品の機能は「Precision Reference」です。 |
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製品の詳細 ( Datasheet PDF )
| 部品番号 LT1021 |
| 部品説明 Precision Reference |
| メーカ Linear Technology |
ロゴ |
このページの下部にプレビューとLT1021ダウンロード（pdfファイル）リンクがあります。 Total 16 pages |
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LT1021
Precision Reference
FEATURES
■ Ultralow Drift: 5ppm/°C Max Slope
■ Very Low Noise: <1ppm P-P (0.1Hz to 10Hz)
■ 100% Noise Tested
■ Pin Compatible with Most Bandgap Reference
Applications, Including Ref 01, Ref 02, LM368,
MC1400 and MC1404 with Greatly Improved
Stability, Noise and Drift
■ Trimmed Output Voltage
■ Operates in Series or Shunt Mode
■ Output Sinks and Sources in Series Mode
■ >100dB Ripple Rejection
■ Minimum Input/Output Differential of 1V
■ Available in 5-Lead Can, N8 and S8 Packages
U
APPLICATIO S
■ A/D and D/A Converters
■ Precision Regulators
■ Digital Voltmeters
■ Inertial Navigation Systems
■ Precision Scales
■ Portable Reference Standard
TYPICAL APPLICATIO
Basic Positive and Negative Connections
LT1021
VIN IN
OUT VOUT
GND
LT1021
(7 AND 10 ONLY)
NC IN
OUT
GND
R1 =
VOUT – (V – )
ILOAD + 1.5mA
–VOUT
R1
–15V
(V –)
1021 TA01
DESCRIPTIO
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%.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Typical Distribution of Temperature Drift
24
DISTRIBUTION
21 OF THREE RUNS
18
15
12
9
6
3
–0
–5 –4 –3 –2 –1 0 1 2 3 4 5
OUTPUT DRIFT (ppm/°C)
1021 TA01
1021fc
1
1 Page
LT1021
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are TA = 25°C. VIN = 10V, IOUT = 0, unless otherwise noted.
PARAMETER
Output Voltage (Note 2)
Output Voltage Temperature Coefficient (Note 3)
Line Regulation (Note 4)
Load Regulation (Sourcing Current)
Load Regulation (Sinking Current)
Supply Current
Output Voltage Noise (Note 6)
Long Term Stability of Output Voltage (Note 7)
Temperature Hysteresis of Output
CONDITIONS
LT1021C-5
LT1021B-5/LT1021D-5
TMIN ≤ TJ ≤ TMAX
LT1021B-5
LT1021C-5/LT1021D-5
7.2V ≤ VIN ≤ 10V
10V ≤ VIN ≤ 40V
0 ≤ IOUT ≤ 10mA
(Note 4)
0 ≤ IOUT ≤ 10mA
(Note 4)
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
∆t = 1000Hrs Noncumulative
∆T = ±25°C
LT1021-5
MIN TYP MAX
4.9975 5.000 5.0025
4.9500 5.000 5.0500
● 25
● 3 20
4 12
● 20
26
● 10
10 20
● 35
60 100
● 150
0.8 1.2
● 1.5
3.0
2.2 3.5
15
10
UNITS
V
V
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm/mA
ppm/mA
mA
mA
µVP-P
µVRMS
ppm
ppm
The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 12V, IOUT = 0, unless otherwise noted.
PARAMETER
CONDITIONS
LT1021-7
MIN TYP MAX
Output Voltage (Note 2)
6.95 7.00 7.05
Output Voltage Temperature Coefficient (Note 3)
Line Regulation (Note 4)
Load Regulation (Sourcing Current)
Load Regulation (Shunt Mode)
Supply Current (Series Mode)
Minimum Current (Shunt Mode)
Output Voltage Noise (Note 6)
Long Term Stability of Output Voltage (Note 7)
Temperature Hysteresis of Output
TMIN ≤ TJ ≤ TMAX
LT1021B-7
LT1021D-7
8.5V ≤ VIN ≤ 12V
12V ≤ VIN ≤ 40V
0 ≤ IOUT ≤ 10mA
(Note 4)
1.2mA ≤ ISHUNT ≤ 10mA
(Notes 4, 5)
VIN is Open
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
∆t = 1000Hrs Noncumulative
∆T = ±25°C
● 25
● 3 20
1.0 4
● 2.0 8
0.5 2
● 1.0 4
12 25
● 40
50 100
● 150
0.75 1.2
● 1.5
0.7 1.0
● 1.2
4.0
2.5 4.0
7
3
UNITS
V
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm/mA
ppm/mA
mA
mA
mA
mA
µVP-P
µVRMS
ppm
ppm
1021fc
3
3Pages
LT1021
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current LT1021-5
1.8
IOUT = 0
1.6
1.4
1.2
TJ = – 55°C
1.0
TJ = 25°C
0.8
TJ = 125°C
0.6
0.4
0.2
0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
LT1021 G10
Load Transient Response
LT1021-5, CLOAD = 0
ISOURCE = 0
ISINK = 0
50mV
50mV
ISOURCE = 0.5mA
ISOURCE = 2-10mA
ISINK = 0.2mA
ISINK = 2-10mA
∆ISOURCE = 100µAP-P ∆ISINK = 100µAP-P
0 12 34 012 34
TIME (µs)
LT1021 G13
Output Voltage Temperature
Drift LT1021-7
7.003
7.002
7.001
7.000
6.999
6.998
6.997
– 50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
LT1021 G16
6
Sink Mode* Current Limit
LT1021-5
60
VIN = 8V
50
40
30
20
10
0
0 2 4 6 8 10 12 14 16 18
OUTPUT VOLTAGE (V)
*NOTE THAT AN INPUT VOLTAGE IS REQUIRED
FOR 5V UNITS.
LT1021 G11
Load Transient Response
LT1021-5, CLOAD = 1000pF
ISOURCE = 0
ISINK = 0
20mV
20mV
ISOURCE = 0.2mA
ISOURCE = 2-10mA
ISINK = 0.2mA
ISINK = 2-10mA
∆ISOURCE = 100µAP-P ∆ISINK = 100µAP-P
0 5 10 15 20 0 5 10 15 20
TIME (µs)
LT1021 G14
Load Regulation
LT1021-7, LT1021-10
5
VIN = 12V
4
3
2
1
0
–1
–2
–3
–4
–5
–10 – 8 – 6 – 4 – 2 0 2 4 6 8 10
SOURCING
SINKING
OUTPUT CURRENT (mA) LT1021 G17
Thermal Regulation LT1021-5
VIN = 25V
∆POWER = 200mW
0 LOAD
REGULATION
– 0.5
– 1.0
THERMAL
REGULATION
ILOAD = 10mA
0 20 40 60 80 100 120 140
TIME (ms)
LT1021 G12
Output Noise 0.1Hz to 10Hz
LT1021-5
FILTERING = 1 ZERO AT 0.1Hz
2 POLES AT 10Hz
5µV (1ppm)
01
23 4
TIME (MINUTES)
56
LT1021 G15
Quiescent Current LT1021-7
1.8
IOUT = 0
1.6
1.4
1.2
1.0 TJ = – 55°C
0.8 TJ = 25°C
0.6 TJ = 125°C
0.4
0.2
0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
LT1021 G18
1021fc
6 Page
合計 : 16 ページ |
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データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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