Datasheet

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LT1009 Series

1009ff

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

2.5V Reference

The LT

1009 is a precision trimmed 2.5V shunt regula-

tor diode featuring a maximum initial tolerance of only

±5mV. The low dynamic impedance and wide operating

current range enhances its versatility. The 0.2% 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

LM136 and the external trim network eliminated.

For a lower drift 2.5V reference, see the LT1019 data

sheet.

2.5V Reference

Reference for 5V Systems

8-Bit A/D and D/A Reference

Digital Voltmeters

Current Loop Measurement and Control Systems

Power Supply Monitor

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Maximum Initial Tolerance: 0.2%

Guaranteed

Temperature Stability

Maximum 0.6Ω Dynamic Impedance

Wide Operating Current Range

Directly Interchangeable with LM136 for Improved

Performance

No Adjustments Needed for Minimum Temperature

Coefﬁ cient

Available in 8-Lead SO and MSOP Packages and

3-Lead TO-92 Package

LT1009

OUTPUT

3.6k

5V TO 35V

10k*

TRIM

1009 TA01

*DOES NOT AFFECT

TEMPERATURE COEFFICIENT.

±5% TRIM RANGE

Output Voltage

TEMPERATURE (°C)

–50

REFERENCE VOLTAGE (V)

2.53

2.52

2.51

2.50

2.49

2.48

2.47

25 75

1009 TA02

–25 0

50 100 125

TYPICAL

GUARANTEED

MAXIMUM

GUARANTEED

MINIMUM

Summary of content (8 pages)

PAGE 1
LT1009 Series 2.5V Reference FEATURES DESCRIPTION n The LT®1009 is a precision trimmed 2.5V shunt regulator diode featuring a maximum initial tolerance of only ±5mV. The low dynamic impedance and wide operating current range enhances its versatility. The 0.2% reference tolerance is achieved by on-chip trimming which not only minimizes the initial voltage tolerance but also minimizes the temperature drift. n n n n n n Maximum Initial Tolerance: 0.2% Guaranteed Temperature Stability Maximum 0.
PAGE 2
LT1009 Series ABSOLUTE MAXIMUM RATINGS (Note 1) Reverse Current .....................................................20mA Forward Current .....................................................10mA Storage Temperature Range...................–65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C Operating Temperature Range LT1009/LT1009C ...................................... 0°C to 70°C LT1009I .............................................. –40°C to 85°C LT1009M (OBSOLETE) ..........
PAGE 3
LT1009 Series ORDER INFORMATION LEAD BASED FINISH TAPE AND REEL LT1009MH PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT1009MH#TR 3-Lead TO-46 Metal Can –55°C to 125°C LT1009CH LT1009CH#TR 3-Lead TO-46 Metal Can 0°C to 70°C LT1009CMS8 LT1009CMS8#TR LTQZ 8-Lead Plastic MSOP 0°C to 70°C LT1009S8 LT1009S8#TR 1009 8-Lead Plastic SO 0°C to 70°C LT1009IS8 LT1009IS8#TR 1009I 8-Lead Plastic SO –40°C to 85°C LT1009CZ LT1009CZ#TR 3-Lead Plastic TO-92 0°C to 70°C LT1009IZ LT1009I
PAGE 4
LT1009 Series TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics Forward Characteristics 10–1 1.2 Reverse Voltage Change 5 REVERSE VOLTAGE CHANGE (mV) TJ = 25°C FORWARD VOLTAGE (V) REVERSE CURRENT (A) 1.0 10–2 10–3 TJ = 25°C TJ = 125°C 10–4 0.8 0.6 0.4 0.2 4 3 2 1 TJ = –55°C 10–5 0.5 1.0 1.8 2.2 1.4 REVERSE VOLTAGE (V) 0 0.001 2.6 0 0.01 0.
PAGE 5
LT1009 Series SCHEMATIC DIAGRAM + Q11 Q7 24k 24k 6.6k Q8 Q7 20pF 30pF 10k Q10 500Ω Q9 Q2 ADJ 30k 6.6k Q4 Q1 Q12 Q6 Q3 Q13 720Ω Q5 – 1009 SD TYPICAL APPLICATIONS Wide Supply Range, Adjustable Reference Low Temperature Coefﬁcient Power Regulator 3.6V TO 40V VIN V+ LM334 V– R IN LT317A OUT ADJ 62Ω VOUT 1.2k 375Ω LT1009 LT1009 10k 2k 1009 TA03 1009 TA04 Switchable ±1.25V Bipolar Reference 5V 5k 5V 5k LT1009 –5V 10k 1% OUT 9.
PAGE 6
LT1009 Series PACKAGE DESCRIPTION H Package 2-Lead and 3-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1340) .209 – .219 (5.309 – 5.537) .178 – .195 (4.521 – 4.953) REFERENCE PLANE .085 – .105 (2.159 – 2.667) .050 (1.270) TYP .500 (12.700) MIN .100 (2.540) TYP .050 (1.270) TYP PIN 1 FOR 3-LEAD PACKAGE ONLY SEATING* PLANE .025 (0.635) MAX 45o .028 – .048 (0.711 – 1.219) .036 – .046 (0.914 – 1.168) .016 – .019** (0.406 – 0.
PAGE 7
LT1009 Series PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 2 3 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1.
PAGE 8
LT1009 Series TYPICAL APPLICATION Low Noise 2.5V Buffered Reference 1μF VIN ≥ 6V 10k 2 1k 10k 1k + 7 LT1001C 3 + 6 2.5V 4 20μF 100k LT1009 – + 20μF 1009 TA06 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1019 Precision Series Reference Bandgap, 0.05%, 5ppm/°C LT1236 Precision Series Reference 5V and 10V Zener-Based 5ppm/°C, SO-8 Package LTC®1798 Micropower Low Dropout Series Reference 0.15% Max, 6.