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LT1009S8 2.5V Reference
FEATURES
s s s s s
DESCRIPTIO
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0.4% Initial Tolerance Max Guaranteed Temperature Stability Maximum 0.6 Dynamic Impedance Wide Operating Current Range Directly Interchangeable with LM336 for Improved Performance No Adjustments Needed for Minimum Temperature Coefficient
The LT1009 is a precision trimmed 2.5V shunt regulator diode featuring a maximum initial tolerance of only 10mV. The low dynamic impedance and wide operating current range enhances its versatility. The 0.4% reference tolerance is achieved by on-chip trimming which not only minimizes the initial voltage tolerance but also minimizes the temperature drift. Even though no adjustments are needed with the LT1009, a third terminal allows the reference voltage to be adjusted 5% to calibrate out system errors. In many applications, the LT1009 can be used as a pin-to-pin replacement of the LM336-2.5 and the external trim network eliminated.
APPLICATI
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Reference for 5V Systems 8-Bit A/D and D/A Reference Digital Voltmeters Current Loop Measurement and Control Systems Power Supply Monitor
TYPICAL APPLICATI
2.5V Reference
2.53
5V TO 35V
2.52
3.6k OUTPUT LT1009 10k* TRIM * DOES NOT AFFECT TEMPERATURE COEFFICIENT. 5% TRIM RANGE
1009S8 TA01
REFERENCE VOLTAGE (V)
2.51 2.50 2.49 2.48 2.47 -50 -25
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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Output Voltage
GUARANTEED MAXIMUM TYPICAL GUARANTEED MINIMUM 50 25 75 0 TEMPERATURE (C) 100 125
1009S8 TA02
UO
UO
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LT1009S8 ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW NC 1 NC 2 NC 3 4 8 7 NC 6 5 ADJ
Reverse Current .................................................... 20mA Forward Current................................................... 10mA Operating Temperature Range .................... 0C to 70C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C
ORDER PART NUMBER LT1009S8 PART MARKING 1009
S8 PACKAGE 8-LEAD PLASTIC SOIC
TJMAX = 175C, JA = 150C/W
ELECTRICAL CHARACTERISTICS
SYMBOL VZ VZ IR rZ VZ Temp VZ Time PARAMETER Reverse Breakdown Voltage Reverse Breakdown Change with Current Reverse Dynamic Impedance Temperature Stability Average Temperature Coefficient Long-Term Stability
VIN = 3V, Military or Commercial Version
MIN 2.49
q
CONDITIONS TA = 25C, IR = 1mA 400A IR 10mA IR = 1mA
q
TMIN TA TMAX 0C TA 70C (Note 1) TA = 25C 0.1C, IR = 1mA
q
TYP 2.50 2.6 3.0 0.2 0.4 1.8 15.0 20
MAX 2.51 10 12 1.0 1.4 4 25
UNITS V mV mV mV ppm/C ppm/kHr
The q denotes specifications which apply over the full operating temperature range.
Note 1: Average temperature coefficient is defined as the total voltage change divided by the specified temperature range.
PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
S8 Package 8-Lead Plastic SOIC
0.189 - 0.197 (4.801 - 5.004) 0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0.016 - 0.050 0.406 - 1.270 0- 8 TYP 0.053 - 0.069 (1.346 - 1.752) 0.004 - 0.010 (0.101 - 0.254) 0.228 - 0.244 (5.791 - 6.197) 0.150 - 0.157 (3.810 - 3.988) 8 7 6 5
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) BSC
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
LT/GP 1093 50 REV A * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1993
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SO8 0493
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