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| SPX385-2.5 Micropower Voltage Reference FEATURES Trimmed Bandgap ............................ 1% and 2% Wide Operating Current ............... 20A to 20mA Extended Temperature Range ... -40C to +85C Dynamic Impedance .............................. 1 max Offered in SOT-23, TO-92, SOIC, and SOT-89 Improved Replacement for LM185/285/385-2.5V, AS385-2.5 Low Cost Solution APPLICATIONS Battery Operating Equipment Adjustable Supplies Switching Power Supplies Error Amplifiers Single Supply Amplifier Monitors / VCR / TV Personal Computers N/C SPX385 3 Pin SOT-23 Cathode Anode Refer to page 4 for pinouts. DESCRIPTION The SPX385-2.5 is a micropower 2-terminal band-gap voltage reference with a very wide operating current range from 20A 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 SPX385-2.5 is available in a SOT-23, TO-92, SOIC-8 and SOT-89 package with an operating temperature range of -40C to 85C. A 1.2 and 5 volt device is also available - SPX385-1.2 and SPX385-5. BLOCK DIAGRAM Cathode (K) 500k + 500k 1.25V Figure 1: Block Diagram Date:05/21/04 Anode (A) SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS 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. Reverse Current (IKA) ............................................................. 30mA Forward Current (IAK) ............................................................. 10mA Operating Temperature Range (TA) ............................ -40 to +85C Junction Temperature (TJ) ..................................................... 150C Storage Temperature (TSTG) ....................................... - 65 to 150C Lead Temperature (Soldering 10 sec.), TL ............................. 300C TYPICAL THERMAL RESISTANCES PACKAGE 0JA 0JC TYPICAL DERATING TO-92 SOT-23 SOIC-8 SOT-89 160C/W 80C/W 575C/W 150C/W 175C/W 45C/W 110C/W 8C/W 6.3 mW/C 1.7 mW/C 5.7 mW/C 9.1 mW/C Typical deratings of the thermal resistances are given for ambient temperature >25. 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 Long Term Stability Operating Temperature 10Hz f 10kHz T=1000Hr; TA = 25C 0.1C -40 F = 20Hz IR = 100A 20A IR 20mA Note 1 CONDITIONS SPX385A-2.5 MIN. TYP. MAX 2.475 2.500 0.6 10 60 15 120 60 +85 -40 2.525 1.0 20 100 20 SPX385-2.5 MIN. TYP. MAX. 2.450 2.500 0.6 10 60 15 120 60 +85 2.550 1.0 20 100 20 UNIT V mV ppm/C A Vrms ppm C Note 1. Three-point measurement guarantees the error band over the specified temperature range. *CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) ppm 0 % 0 mV 0 DVKA TC in mV/C = D DVKA (mV) DTA -10 5000 0.5 TC in % /C = ( DVKA DVKA at 25C DTA ) x 100 0 15 30 45 60 75 90 105 TC in ppm/C = ( DVKA DVKA at 25C DTA ) x 106 Junction Temperature (C) 0.07 mV/C 0.003 %/C 27 ppm/C Figure 2. VKA vs. Temperature Date:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 2 TYPICAL PERFORMANCE CHARACTERISTICS 30 25 VIN VKA Temperature Range: 0C to 85C VKA IK - Cathode Current (mA) 20 15 10 IK 5 0 -5 -10 -15 -20 -2 -1 0 1 2 3 VKA - Cathode Voltage (V) Figure 3. Test Circuit Figure 4. High Current Operating Characteristics 45 2.53 IK = 10mA 2.52 2.51 30 2.50 VREF = 2.500V at 25C 2.49 IK - Cathode Current (A) VKA - Voltage (V) 85C 15 25C -0C 2.48 2.47 0 2.46 2.45 -60 -30 0 30 60 90 120 -1.0 0 1.0 2.0 3.0 TA - Ambient Temperature (C) VKA - Cathode Voltage (V) Figure 5. Reference Voltage vs. Ambient Temperature SPX385-2.5 Figure 6. Low Current Operating Characteristics * IOUT = 2.5V R2 * IOUT = 2.5V R2 30V SPX385-2.5 R1 68k C1 150pF 2 - 7 6 R1 68k 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:05/21/04 Figure 7b. Precision 1A to 1mA Current Source (c) Copyright 2004 Sipex Corporation SPX385-2.5 Micropower Voltage Reference 3 TYPICAL PERFORMANCE CHARACTERISTICS 9V VIN LM338 375 5V 200k SPX385-2.5 2.5V SPX385-2.5 120 Figure 8. Improving Regulation of Adjustable Regulators Figure 9. Micropower Reference from 9V Battery IQ VIN = 3.7V to 30V VIN = 15V 500k 7 + 3 LM4250C 8 2 6 10V LM334 3.3k OUT 2.5V SPX385-2.5 4 22M 150pF 1.5M SPX385-2.5 500k IQ 30A Standby Current Figure 10. Wide Input Range Reference Figure 11: Precision Micropower 10V Reference PACKAGE PINOUTS 8-Pin NSOIC N/C N/C N/C ANODE 1 2 3 4 8 7 6 5 CATHODE N/C N/C N/C N/C 1 CATHODE 2 ANODE 1 2 3 ANODE CATHODE 1 2 3 SOT-23-3 (M) 3 SOT-89 (M1) TO-92 (N) N/C ANODE CATHODE N/C Top View Top View Top View Bottom View Date:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 4 PACKAGE: 3 PIN SOT-23 D b 3 B B E1 E SEE VIEW C VIEW A-A 1 e 2 SEE VIEW D e1 L Gauge Plane Seating Plane O VIEW C Dimensions in (mm) 3 PIN SOT-23 A A1 A2 b c D e e1 E E1 L L2 O MIN 0 NOM MAX 1.25 0.10 1.150 0.45 0.20 A A A2 Seating Plane 1.050 1.100 0.36 0.15 0.38 - A C A1 SIDE VIEW b WITH PLATING 2.901 2.926 0.925 0.950 1.850 1.900 2.951 0.975 1.950 2.900 1.651 0.53 0.05 8 L2 BASE METAL SECTION B-B c 2.700 2.800 1.601 0.37 0 1.626 0.45 - VIEW D 3 PIN SOT-23 Date:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 5 PACKAGE: 3 PIN SOT-89 D D1 3 O1.0 E H 5'(2x) 1 e 2 e1 C Dimensions in (mm) 3 PIN SOT-89 LINGSEN # PO-SOT-004 MIN NOM MAX 1.40 0.36 0.41 0.38 4.40 1.40 2.40 1.45 2.90 3.94 0.80 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 A b b1 C D D1 E e e1 H L B'(2x) RO.15 b b1 b 3 PIN SOT-89 Date:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 6 PACKAGE: 8 PIN NSOIC D e E/2 E1 E E1/2 SEE VIEW C 1 INDEX AREA (D/2 X E1/2) A b O1 TOP VIEW Gauge Plane L2 Seating Plane O1 L L1 O VIEW C A A2 SEATING PLANE A1 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 PACKAGE: 8 PIN NSOIC Date:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 7 PACKAGE: 3 PIN TO-92 L e e1 W D A b S1 DIMENSIONS Minimum/Maximum (mm) 3 PIN TO-92 CARSEM DWG # TLG920001 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:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 8 ORDERING INFORMATION Part Number SPX385AM-2.5 SPX385AM-2.5/TR SPX385AM1-2.5 SPX385AM1-2.5/TR SPX385AS-2.5 SPX385AS-2.5/TR SPX385AN-2.5 SPX385AN-2.5/TR SPX385M-2.5 SPX385M-2.5/TR SPX385M1-2.5 SPX385M1-2.5/TR SPX385S-2.5 SPX385S-2.5/TR SPX385N-2.5 SPX385N-2.5/TR /TR = Tape and Reel Pack quanity is 2000 for TO-92 and 2500 for SOT-23, SOT-89 and NSOIC. . Accuracy 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 2.0% 2.0% 2.0% 2.0% 2.0% 2.0% 2.0% 2.0% Output Voltage 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V Package Type 3-Pin SOT-23 3-Pin SOT-23 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-23 3-Pin SOT-23 3-Pin SOT-89 3-Pin SOT-89 8-Pin NSOIC 8-Pin NSOIC 3-Pin TO-92 3-Pin TO-92 ANALOG EXCELLENCE Sipex Corporation 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:05/21/04 SPX385-2.5 Micropower Voltage Reference (c) Copyright 2004 Sipex Corporation 9 |
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