LT9 Series.5V Reference FEATURES n Maximum Initial Tolerance:.% n Guaranteed Temperature Stability n Maximum.6Ω Dynamic Impedance n Wide Operating Current Range n Directly Interchangeable with LM6 for Improved Performance n No Adjustments Needed for Minimum Temperature Coeffi cient n Available in 8-Lead SO and MSOP Packages and -Lead TO-9 Package APPLICATIONS n Reference for 5V Systems n 8-Bit A/D and D/A Reference n Digital Voltmeters n Current Loop Measurement and Control Systems n Power Supply Monitor DESCRIPTION The LT 9 is a precision trimmed.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.% 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 LT9, a third terminal allows the reference voltage to be adjusted ±5% to calibrate out system errors. In many applications, the LT9 can be used as a pin-to-pin replacement of the LM6 and the external trim network eliminated. For a lower drift.5v reference, see the LT9 data sheet. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ICAL APPLICATION.5V Reference Output Voltage 5V TO 5V.5.6k.5 LT9 k* TRIM *DOES NOT AFFECT TEMPERATURE COEFFICIENT. ±5% TRIM RANGE OUTPUT 9 TA REFEREE VOLTAGE (V).5.5.9.8 GUARANTEED MAXIMUM GUARANTEED MINIMUM ICAL.7 5 5 5 5 75 5 TEMPERATURE ( C) 9 TA
LT9 Series ABSOLUTE MAXIMUM RATINGS (Note ) Reverse Current...mA Forward Current...mA Storage Temperature Range... 65 C to 5 C Lead Temperature (Soldering, sec)... C Operating Temperature Range LT9/LT9C... C to 7 C LT9I... C to 85 C LT9M (OBSOLETE)... 55 C to 5 C PIN CONFIGURATION BOTTOM VIEW ( ) TOP VIEW 8 () 7 6 () 5 H PACKAGE -LEAD TO-6 METAL CAN T JMAX = 5 C, θ JA = C/W, θ JC = 8 C/W OBSOLETE PACKAGE Consider the MS8, S8 or Z Packages for Alternate Source MS8 PACKAGE 8-LEAD PLASTIC MSOP T JMAX = 5 C, θ JA = 5 C/W TOP VIEW BOTTOM VIEW 8 7 () 6 () ( ) S8 PACKAGE 8-LEAD PLASTIC SO T JMAX = 5 C, θ JA = 9 C/W 5 Z PACKAGE -LEAD PLASTIC TO-9 T JMAX = C, θ JA = 6 C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT9MH#PBF LT9MH#TRPBF -Lead TO-6 Metal Can 55 C to 5 C LT9CH#PBF LT9CH#TRPBF -Lead TO-6 Metal Can C to 7 C LT9CMS8#PBF LT9CMS8#TRPBF LTQZ 8-Lead Plastic MSOP C to 7 C LT9S8#PBF LT9S8#TRPBF 9 8-Lead Plastic SO C to 7 C LT9IS8#PBF LT9IS8#TRPBF 9I 8-Lead Plastic SO C to 85 C LT9CZ#PBF LT9CZ#TRPBF -Lead Plastic TO-9 C to 7 C LT9IZ#PBF LT9IZ#TRPBF -Lead Plastic TO-9 C to 85 C
LT9 Series ORDER INFORMATION LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT9MH LT9MH#TR -Lead TO-6 Metal Can 55 C to 5 C LT9CH LT9CH#TR -Lead TO-6 Metal Can C to 7 C LT9CMS8 LT9CMS8#TR LTQZ 8-Lead Plastic MSOP C to 7 C LT9S8 LT9S8#TR 9 8-Lead Plastic SO C to 7 C LT9IS8 LT9IS8#TR 9I 8-Lead Plastic SO C to 85 C LT9CZ LT9CZ#TR -Lead Plastic TO-9 C to 7 C LT9IZ LT9IZ#TR -Lead Plastic TO-9 C to 85 C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/ AVAILABLE OPTIONS TEMPERATURE PACKAGE STYLE TEMPERATURE ACCURACY (%) COEFFICIENT (ppm/ C) TO-6 (H) OBSOLETE MSOP-8 (MS8) SO-8 (S8) C to 7 C. 5 LT9CH. 5 LT9CMS8 LT9S8 C to 85 C. 5. 5 LT9IS8 55 C to 5 C. 5 LT9MH TO-9 (Z) LT9CZ LT9IZ ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T A = 5 C. SYMBOL PARAMETER V Z Reverse Breakdown Voltage ΔV Z ΔI R r Z ΔV Z ΔTemp ΔV Z ΔTime Reverse Breakdown Change with Current Reverse Dynamic Impedance CONDITIONS T A = 5 C, I R = ma H, Z Pkg MS, S Pkg μa I R ma l LTM LT9I LT9/LT9C MIN MAX MIN MAX MIN MAX.95.5.55.95.9 I R = ma..6.... Ω l...... Ω Temperature Stability T MIN T A T MAX l 5 5.8 mv Average Temperature Coefficient (Notes, ) C T A 7 C C T A 85 C 55 C T A 5 C.6. 5 5 6 5 5.5.5.6..55.5 5 5 5.95.9.5.5.6..55.5 UNITS V V mv mv 5 5 ppm/ C ppm/ C ppm/ C Long-Term Stability T A = 5 C ±. C, I R = ma ppm/khr Note : Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note : Guaranteed by Design. Note : Average temperature coeffi cient is defi ned as the total voltage change divided by the specifi ed temperature change.
LT9 Series ICAL PERFORMAE CHARACTERISTICS Reverse Characteristics Forward Characteristics Reverse Voltage Change. 5 T J = 5 C REVERSE CURRENT (A) T J = 5 C T J = 5 C T J = 55 C FORWARD VOLTAGE (V)..8.6.. REVERSE VOLTAGE CHANGE (mv) 5.5...8..6 REVERSE VOLTAGE (V) 9 G... FORWARD CURRENT (ma) 9 G 8 6 REVERSE CURRENT (ma) 9 G DYNAMIC IMPEDAE (Ω). Dynamic Impedance Output Noise Voltage Response Time I R = ma 55 C T J 5 C k k k FREQUEY (Hz) NOISE (nv/ Hz) 5 5 I R = ma T J = 5 C 5 k k k FREQUEY (Hz) VOLTAGE SWING (V).5..5..5..5 INPUT OUTPUT 5k INPUT OUTPUT TIME (μs) 9 G 9 G5 9 G6
SCHEMATIC DIAGRAM LT9 Series Q7 Q k k 6.6k Q8 Q7 pf k pf Q 5Ω Q Q Q Q9 k 6.6k Q6 Q Q Q5 7Ω Q 9 SD ICAL APPLICATIONS Wide Supply Range, Adjustable Reference Low Temperature Coeffi cient Power Regulator.6V TO V V LM V R 6Ω V IN LT7A IN OUT.k 75Ω V OUT LT9 k LT9 9 TA k 9 TA Switchable ±.5V Bipolar Reference 5V 5k 5V 5V 5k LT9 k % OUT 9.76k % 5Ω 9 TA5 5k 5V 5
LT9 Series PACKAGE DESCRIPTION H Package -Lead and -Lead TO-6 Metal Can (Reference LTC DWG # 5-8-).9.9 (5.9 5.57).78.95 (.5.95).5 (.7) MIN REFEREE PLANE.6.9** (.6.8) DIA.85.5 (.59.667).5 (.65) MAX SEATING* PLANE.5 (.7).6.6 (.9.68). (.5) PIN * LEAD DIAMETER IS UONTROLLED BETWEEN THE REFEREE PLANE AND.5" BELOW THE REFEREE PLANE.6. ** FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (.6.6) 5 OBSOLETE PACKAGE.5 (.7) FOR -LEAD PACKAGE ONLY.8.8 (.7.9) H/(TO-6) 8 MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 5-8-66).. (.8.) (NOTE ) 8 7 6 5.5 (.5) REF 5. (.6) MIN..8 (.65.5).889.7 (.5.5)..5 (.6.6).65 (.56) BSC RECOMMENDED SOLDER PAD LAYOUT GAUGE PLANE.8 (.7).5 (.) DETAIL A DETAIL A NOTE:. DIMENSIONS IN MILLIMETER/(IH). DRAWING NOT TO SCALE 6.5.5 (..6) SEATING PLANE.9.5 (.9.6). (.) MAX..8 (.9.5).65 (.56) BSC. DIMENSION DOES NOT ILUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED.5mm (.6") PER SIDE. DIMENSION DOES NOT ILUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED.5mm (.6") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE.mm (.") MAX.. (.8.) (NOTE ).86 (.) REF.6.58 (..) MSOP (MS8) 7 REV F 6
PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow.5 Inch) (Reference LTC DWG # 5-8-6) LT9 Series.5 BSC.5 ±.5.89.97 (.8 5.) NOTE 8 7 6 5.5 MIN.6 ±.5.8. (5.79 6.97).5.57 (.8.988) NOTE. ±.5 RECOMMENDED SOLDER PAD LAYOUT.8. (..5).. (.5.58) 5 8.5.69 (.6.75).. (..5).6.5..9 (.6.7) (.55.8) NOTE: IHES. DIMENSIONS IN (MILLIMETERS). DRAWING NOT TO SCALE. THESE DIMENSIONS DO NOT ILUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED.6" (.5mm).5 (.7) BSC SO8 Z Package -Lead Plastic TO-9 (Similar to TO-6) (Reference LTC DWG # 5-8-).6.5 (.5.7) DIA.8.5 (.57.7).8.5 (.57.7).9 (.86) NOM.5 (.7) MIN.5 UONTROLLED (.7) LEAD DIMENSION MAX 5 NOM.5 (.7) BSC BULK PACK.6. (.6.76).6. (.5.5).5. (.8.5) Z (TO-9) 8 REV C.98.6/. (.5./.) PLCS TO-9 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION.. (.556.7) NOM 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. 7
LT9 Series ICAL APPLICATION Low Noise.5V Buffered Reference μf V IN 6V k k LT9 k k k μf μf 7 LTC 6.5V 9 TA6 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT9 Precision Series Reference Bandgap,.5%, 5ppm/ C LT6 Precision Series Reference 5V and V Zener-Based 5ppm/ C, SO-8 Package LTC 798 Micropower Low Dropout Series Reference.5% Max, 6.5μA Supply Current LT6 Micropower Precision Series Reference Bandgap, μa Supply Current ppm/ C, Available in SOT- LT6 Micropower Precision Shunt Voltage Reference Bandgap.5%, ppm/ C, μa Supply Current LT6 Micropower Precision Series Reference.% Max, ppm/ C Max, 5μA Supply Current 8 LT 9 REV F PRINTED IN USA Linear Technology Corporation 6 McCarthy Blvd., Milpitas, CA 955-77 (8) -9 FAX: (8) -57 www.linear.com LINEAR TECHNOLOGY CORPORATION 985