LT1021DCS8-7 Linear Technology, LT1021DCS8-7 Datasheet

IC PREC VOLT REF 7V 8-SOIC

LT1021DCS8-7

Manufacturer Part Number
LT1021DCS8-7
Description
IC PREC VOLT REF 7V 8-SOIC
Manufacturer
Linear Technology
Datasheet
1.LT1021DCN8-5PBF.pdf (16 pages)

Specifications of LT1021DCS8-7

Reference Type
Series, Shunt
Voltage - Output
7V
Tolerance
±50mV
Temperature Coefficient
20ppm/°C
Voltage - Input
8.5 ~ 40 V
Number Of Channels
1
Current - Quiescent
1.2mA
Current - Output
10mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Cathode
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
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Part Number:
LT1021DCS8-7
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
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Part Number:
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Manufacturer:
LT
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Company:
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Part Number:
LT1021DCS8-7#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
V
Ultralow Drift: 5ppm/
Very Low Noise: <1ppm
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
A/D and D/A Converters
Precision Regulators
Digital Voltmeters
Inertial Navigation Systems
Precision Scales
Portable Reference Standard
IN
IN
Basic Positive and Negative Connections
LT1021
GND
OUT
U
V
OUT
°
C Max Slope
R1 =
P-P
NC
I
(0.1Hz to 10Hz)
LOAD
V
OUT
U
+ 1.5mA
– (V
(7 AND 10 ONLY)
IN
–
)
LT1021
–15V
GND
(V
–
R1
)
OUT
–V
OUT
1021 TA01
DESCRIPTIO
The LT
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%.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1021 is a precision reference with ultralow drift
– 0
Typical Distribution of Temperature Drift
24
21
18
15
12
9
6
3
– 5
– 4
Precision Reference
– 3
U
OUTPUT DRIFT (ppm/°C)
– 2
–1
0
1
DISTRIBUTION
OF THREE RUNS
2
3
1021 TA01
4
5
LT1021
1021fc
1

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LT1021DCS8-7 Summary of contents

Page 1

... 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. LT1021 (7 AND 10 ONLY) ...

Page 2

... LT1021BCN8-5 LT1021DMH-5 LT1021CCN8-5 LT1021BCH-7 LT1021CIN8-5 LT1021BMH-7 LT1021DCN8-5 LT1021DCH-7 LT1021DIN8-5 LT1021DMH-7 LT1021BCN8-7 LT1021BCH-10 LT1021DCN8-7 LT1021CMH-10 LT1021BCN8-10 LT1021DCH-10 LT1021CCN8-10 LT1021DMH-10 LT1021CIN8-10 LT1021DCN8-10 OBSOLETE LT1021DIN8-10 S8 ORDER PART NUMBER LT1021DCS8-5 LT1021DCS8-7 LT1021DCS8-10 TOP VIEW DNC* 1 DNC DNC DNC 0UT GND 4 TRIM PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO = 130° ...

Page 3

ELECTRICAL C HARA TERISTICS C range, otherwise specifications are T = 25° 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 ...

Page 4

LT1021 ELECTRICAL C HARA TERISTICS C range, otherwise specifications are T = 25° PARAMETER Output Voltage (Note 2) Output Voltage Temperature Coefficient (Note 3) Line Regulation (Note 4) Load Regulation (Sourcing Current) Load Regulation (Shunt Mode) Supply Current ...

Page 5

W U TYPICAL PERFOR A Ripple Rejection 115 f = 150Hz LT1021-7 110 LT1021-10 105 100 LT1021 INPUT VOLTAGE (V) LT1021 G01 Start-Up (Series Mode ...

Page 6

LT1021 W U TYPICAL PERFOR A Quiescent Current LT1021-5 1 OUT 1.6 1.4 1 – 55° 25° 125°C J 0.6 0.4 0 ...

Page 7

W U TYPICAL PERFOR A Shunt Characteristics LT1021-7 1.2 INPUT PIN OPEN 1.0 0 – 55° 25°C J 0.6 0 125° ...

Page 8

LT1021 W U TYPICAL PERFOR A Shunt Characteristics LT1021-10 1.8 INPUT PIN OPEN 1.6 1.4 1.2 1 – 55° 25°C 0 125° ...

Page 9

U U APPLICATIONS INFORMATION Effect of Reference Drift on System Accuracy A large portion of the temperature drift error budget in many systems is the system reference voltage. This graph indicates the maximum temperature coefficient allowable if the reference is ...

Page 10

LT1021 U U APPLICATIONS INFORMATION minimized. In the current output circuit, R1 determines output current. It should have a TC commensurate with the LT1021 or track closely with the feedback resistor around the op amp. LT1021-7 IN OUT R2* GND ...

Page 11

U U APPLICATIONS INFORMATION Effects of Air Movement on Low Frequency Noise The LT1021 has very low noise because of the buried zener used in its design. In the 0.1Hz to 10Hz band, peak-to-peak noise is about 0.5ppm of the ...

Page 12

LT1021 U TYPICAL APPLICATIONS Boosted Output Current with No Current Limit + ≥ 1.8V) OUT R1 220Ω 2N2905 IN LT1021 10V AT OUT 100mA GND + 2µF SOLID TANT 1021 TA05 2-Pole Lowpass Filtered Reference 1µF MYLAR ...

Page 13

U TYPICAL APPLICATIONS Strain Gauge Conditioner for 350Ω Bridge R1 357Ω 1/2W 28mA LT1021-10 28.5mA 15V IN OUT GND † LM301A 2 – 1 100pF 8 * THIS RESISTOR PROVIDES POSITIVE FEEDBACK TO THE BRIDGE TO ELIMINATE ...

Page 14

LT1021 U TYPICAL APPLICATIONS R1** 253k R8 10M R9 100k R3 392k 1% –15V U W EQUIVALE T SCHE ATIC 14 Ultralinear Platinum Temperature Sensor* LT1021-10 IN 20V OUT GND R2* R10 5k 182k 1% R11 6.65M 1% ...

Page 15

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) 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. ...

Page 16

... MSOP www.linear.com ● .189 – .197 (4.801 – 5.004) NOTE .150 – .157 (3.810 – 3.988) NOTE .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0303 LT 1005 REV C • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1995 1021fc ...

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