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LT1021 Datasheet

Precision Reference

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LT1021 pdf
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


Linear Technology Electronic Components Datasheet

LT1021 Datasheet

Precision Reference

No Preview Available !

LT1021 pdf
LT1021
ABSOLUTE AXI U RATI GS (Note 1)
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 VOUT
Negative ........................................................... – 20V
Output Short-Circuit Duration
VIN = 35V ......................................................... 10 sec
VIN 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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NC*
TOP VIEW
8
NC* 1
7 NC*
DNC* 1
VIN 2
8 DNC*
7 DNC*
VIN 2
6 VOUT
DNC* 3
6 V0UT
NC* 3
5 TRIM**
4
GND
H PACKAGE
8-LEAD TO-5 METAL CAN
*CONNECTED INTERNALLY. DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS.
**NO TRIM PIN ON LT1021-7. DO NOT CONNECT EXTERNAL CIRCUITRY TO PIN 5 ON LT1021-7
TJMAX = 150°C, θJA = 150°C/W,θJC = 45°C/W
GND 4
5 TRIM**
N8 PACKAGE
S8 PACKAGE
8-LEAD PDIP 8-LEAD PLASTIC SO
*CONNECTED INTERNALLY. DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS.
**NO TRIM PIN ON LT1021-7. DO NOT CONNECT EXTERNAL CIRCUITRY TO PIN 5 ON LT1021-7
TJMAX = 130°C, θJA = 130°C/W (N)
TJMAX = 130°C, θJA = 150°C/W (S)
ORDER PART NUMBER
LT1021BCH-5
LT1021BMH-5
LT1021CCH-5
LT1021CMH-5
LT1021BMH-10
LT1021DCH-5
LT1021DMH-5
LT1021BCH-7
LT1021BMH-7
LT1021DCH-7
LT1021DMH-7
LT1021BCH-10
LT1021CMH-10
LT1021DCH-10
LT1021DMH-10
OBSOLETE
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
N8 ORDER PART NUMBER
LT1021BCN8-5
LT1021CCN8-5
LT1021CIN8-5
LT1021DCN8-5
LT1021DIN8-5
LT1021BCN8-7
LT1021DCN8-7
LT1021BCN8-10
LT1021CCN8-10
LT1021CIN8-10
LT1021DCN8-10
LT1021DIN8-10
S8 ORDER PART NUMBER
LT1021DCS8-5
LT1021DCS8-7
LT1021DCS8-10
S8 PART MARKING
2105
2107
2110
1021fc
2


Part Number LT1021
Description Precision Reference
Maker Linear Technology
Total Page 16 Pages
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