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| (R) SPX385-1.2 Micropower Voltage Reference FEATURES Low Output Voltage ................................ 1.235V Dynamic Impedance...............................1 max Low Temperature Coefficient........30ppm/C (typ) 8 ANODE Operating Current ........................ 10A to 20mA N/C 1 SPX385-1.2 Extended Temperature Range .. -40C to +85C N/C 2 7 N/C Initial Tolerance..................................1% and 2% 6 N/C N/C 3 8 Pin nSOIC Pin Compatible with LM185/285/385, 1.23V 5 N/C APPLICATIONS CATHODE 4 Portable Meter Reference Portable Test Instruments Now Available in Lead Free Packaging Battery Operated Systems Panel Meters DESCRIPTION The SPX385-1.2 is a micropower 2-terminal band-gap voltage reference with a very wide operating current range from 10A to 20mA that provides a stable voltage. The high stability of this device is primarily the result of the low temperature coefficient Thin Film Resistor process and Laser Trimming of the output voltage at the wafer level. The SPX385-1.2 is available in a TO-92, SOIC-8 and SOT-89 package with an operating temperature range of -40C to 85C. A 2.5 and 5.0 volt devices are also available - SPX385-2.5, SPX385-5.0. BLOCK DIAGRAM Cathode (K) + 1.235V Anode (A) Figure 1: Block Diagram Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Reverse Current (IKA)) ................................................................. 30mA Forward Current (IAK) .................................................................. 10mA Operating Temperature Range (TA) ................................. -40 to +85C Continuos Power Dissipation at 25C (PD) TO-92 ................................................................... 775mW SOIC-8 ................................................................. 750mW SOT-89 ............................................................... 1000mW Junction Temperature (TJ) .......................................................... 150C Storage Temperature (TSTG) ............................................ - 65 to 150C Lead Temperature (Soldering 10 sec.), TL .................................. 300C Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. TYPICAL THERMAL RESISTANCES PACKAGE TO-92 SOIC-8 SOT-89 0JA 160C/W 175C/W 110C/W 0JA 80C/W 45C/W 8C/W TYPICAL DERATING 6.3 mW/C 5.7mW/C 9.1mW/C ELECTRICAL CHARACTERISTICS IIN = 100A, TA = 25C, unless otherwise specified. PARAMETER Reference Voltage Dynamic Output Impedance Reference Voltage Change with IR Temperature Coefficient Minimum Operating Current Output Wideband Noise Operating Temperature 10Hz f 10kHz -40 F = 20Hz IR = 100A 10A IR 20mA Note 1 CONDITIONS SPX385A-1.2 MIN. TYP. MAX 1.223 1.235 0.6 10 30 8 60 +85 -40 1.247 1.0 20 50 10 SPX385-1.2 MIN. TYP. MAX. 1.205 1.235 0.6 10 30 8 60 +85 1.260 1.0 20 50 10 UNIT V mV ppm/C A Vrms C Note 1. Three-point measurement guarantees the error band over the specified temperature range. * ppm 0 CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) % 0 mV 0 VKA TC in mV/C = T VKA (mV) TA -5 5000 0.5 TC in % /C = ( VKA VKA at 25C TA ) x 100 0 15 30 45 60 75 90 105 TC in ppm/C = ( VKA VKA at 25C TA ) x 106 Junction Temperature (C) 0.033 mV/C 0.0027 %/C 27 ppm/C Figure 2. VREF vs. Temperature Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 2 TYPICAL PERFORMANCE CHARACTERISTICS 30 Temperature Range: 0C to 85C 25 VIN VKA = VREF IK - Cathode Current (mA) 20 15 10 5 IK 0 -5 -10 -15 -20 -2 -1 0 1 1.23 2 3 VKA - Cathode Voltage (V) Figure 3. Test Circuit for VKA=VREF Figure 4. High Current Operating Characteristics 18 1.250 IK = 10mA 1.245 Temperature Range: 0C to 85C 1.240 12 VREF - Reference Voltage (V) 1.235 IK - Cathode Current (A) 1.230 85 C 6 25 C -0 C 1.225 1.200 0 1.150 1.100 -60 -30 0 30 60 90 120 -1.0 0 0.5 -0.5 1.0 1.5 TA - Ambient Temperature (C) VKA - Cathode Voltage (V) Figure 5. Reference Voltage vs. Ambient Temperature SPX385-1.2 Figure 6. Low Current Operating Characteristics * IOUT = 1.23V R2 * IOUT = 1.23V R2 30V SPX385-1.2 R1 100k C1 150pF 2 - 7 6 R1 100k C1 150pF 2 - 7 6 LM312 3 LM312 3 + 4 + 4 IOUT* -1.5V to -27V -30V R2 1.5V to 27V IOUT* R2 Figure 7a. Precision 1A to 1mA Current Sink Date: 5/25/04 Figure 7b. Precision 1A to 1mA Current Source (c) Copyright 2004 Sipex Corporation SPX385-1.2 Micropower Voltage Reference 3 TYPICAL PERFORMANCE CHARACTERISTICS 9V 1.5V 3k 1.2V SPX385-1.2 500k 1.2V SPX385-1.2 Figure 8. Reference from 1.5V Battery Figure 9. Micropower Reference from 9V Battery IQ VIN = 2.3V to 30V VIN = 15V 1M 7 + 3 LM4250C 8 2 6 10V LM334 4.3k OUT 1.2V SPX385-1.2 4 22M 150pF 3.5M SPX385-1.2 500k IQ 20A Standby Current Figure 10. Wide Input Range Reference Figure 11: Precision Micropower 10V Reference Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 4 PACKAGE: 8 PIN NSOIC D e E/2 E1 E E1/2 SEE VIEW C 1 INDEX AREA (D/2 X E1/2) b O1 TOP VIEW L2 Seating Plane O1 Gauge Plane O L L1 A A2 SEATING PLANE A1 VIEW C SIDE VIEW 8 Pin NSOIC (JEDEC MS-012, AA - VARIATION) DIMENSIONS Minimum/Maximum (mm) WITH PLATING b COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c D E E1 e L L1 L2 O O1 MIN NOM MAX 1.75 1.35 0.25 0.10 1.25 1.65 0.31 0.51 0.17 0.25 4.90 BSC 6.00 BSC 3.90 BSC 1.27 BSC 0.40 1.27 1.04 REF 0.25 BSC 0 8 5 15 c BASE METAL CONTACT AREA 8 PIN NSOIC Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 5 PACKAGE: 3 PIN TO-92 L e e1 W D A b S1 3 PIN TO-92 CARSEM DWG # TLG920001 DIMENSIONS Minimum/Maximum (mm) COMMON HEIGHT DIMENSION SYMBOL A b E e e1 L R S1 W D MIN NOM 4.32 0.36 3.30 2.41 1.14 12.70 2.16 1.14 0.41 4.45 4 - MAX 4.95 R 0.51 3.94 2.67 1.40 15.49 2.41 1.52 0.56 4.95 6 E (2x) 3 PIN TO-92 Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 6 PACKAGE: 3 PIN SOT-89 D D1 3 O1.0 E H 5'(2x) 1 e 2 e1 C 3 PIN SOT-89 LINGSEN # PO-SOT-004 A b b1 C D D1 E e e1 H L Dimensions in (mm) MIN 1.40 0.36 0.41 0.38 4.40 1.40 2.40 1.45 2.90 3.94 0.80 NOM MAX 1.50 0.42 0.47 0.40 4.50 1.60 2.50 1.50 3.00 1.60 0.48 0.53 0.43 4.60 1.75 2.60 1.55 3.10 4.25 1.20 B'(2x) RO.15 b b1 b 3 PIN SOT-89 Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 7 PINOUTS 8-Pin Surface Mount (S) N/C N/C N/C CATHODE 1 2 3 4 8 7 6 5 ANODE N/C 1 N/C N/C N/C ANODE CATHODE N/C ANODE CATHODE 2 3 SOT-89 (M1) TO-92 (N) 1 2 3 Top View Top View Bottom View ORDERING INFORMATION Part Number SPX385AM1-1.2 SPX385AM1-1.2/TR SPX385AS-1.2 SPX385AS-1.2/TR SPX385AN-1.2 SPX385AN-1.2/TR SPX385M1-1.2 SPX385M1-1.2/TR SPX385S-1.2 SPX385S-1.2/TR SPX385N-1.2 SPX385N-1.2/TR Accuracy 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 2.0% 2.0% 2.0% 2.0% 2.0% 2.0% Output Voltage 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V 1.235V Package Type 3-Pin SOT-89 3-Pin SOT-89 8-Pin NSOIC 8-Pin NSOIC 3-Pin TO-92 3-Pin TO-92 3-Pin SOT-89 3-Pin SOT-89 8-Pin NSOIC 8-Pin NSOIC 3-Pin TO-92 3-Pin TO-92 Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX385S-1.2/TR = standard; SPX385S-L-1.2/TR = lead free /TR = Tape and Reel Pack quantity is 2000 for TO-92; 2500 for NSOIC and SOT-89. Sipex Corporation (R) ANALOG EXCELLENCE Headquarters and Sales Office: 233 Hillview Dr Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 8 |
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