SPX385-2 SPX385 LM185/285/385-2 AS385-2 SPX385-1 SPX385-5 SPX385A-2 LM312 LM338

Micropower Voltage Reference FEATURES N/C Trimmed Bandgap . 1% and 2% Wide Operating Current . 20µA to 20mA Extended

SPX385-2 SPX385-2.5 Micropower Voltage Reference FEATURES N/C Trimmed Bandgap . 1% and 2% Wide Operating Current . 20µA to 20mA Extended Temperature Range . -40°C to +85°C SPX385 SPX385 Dynamic Impedance . 1 max 3 Pin SOT-23 Offered in SOT-23, TO-92, SOIC, and SOT-89 Improved Replacement for LM185/285/385-2 LM185/285/385-2.5V, Cathode Anode AS385-2 AS385-2.5 Now Available in Lead Free Packaging Low Cost Solution Refer to page 4 for pinouts. APPLICATIONS Battery Operating Equipment Adjustable Supplies Switching Power Supplies Error Amplifiers Single Supply Amplifier Monitors / VCR / TV Personal Computers DESCRIPTION The SPX385-2 SPX385-2.5 is a micropower 2-terminal band-gap voltage reference with a very wide operating current range from 20µA 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 SPX385-2.5 is available in a SOT-23, TO-92, SOIC-8 and SOT-89 package with an operating temperature range of -40°C to 85°C. A 1.2 and 5 volt device is also available - SPX385-1 SPX385-1.2 and SPX385-5 SPX385-5. BLOCK DIAGRAM Cathode (K) 500k + 500k 1.25V Figure 1: Block Diagram Date: 11/05/04 Anode (A) SPX385-2 SPX385-2.5 Micropower Voltage Reference 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS TYPICAL THERMAL RESISTANCES 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. PACKAGE 0JA 0JC TYPICAL DERATING TO-92 160°C/W 80°C/W 6.3 mW/°C SOT-23 575°C/W 150°C/W 1.7 mW/°C SOIC-8 Reverse Current (IKA) . 30mA Forward Current (IAK) . 10mA Operating Temperature Range (TA) . -40 to +85°C Junction Temperature (TJ) . 150°C Storage Temperature (TSTG) . - 65 to 150°C Lead Temperature (Soldering 10 sec.), TL . 300°C 175°C/W 45°C/W 5.7 mW/°C SOT-89 110°C/W 9.1 mW/°C 8°C/W Typical deratings of the thermal resistances are given for ambient temperature >25°. ELECTRICAL CHARACTERISTICS IIN = 100µA, TA = 25°C, unless otherwise specified. SPX385A-2 SPX385A-2.5 MIN. TYP. MAX CONDITIONS Reference Voltage SPX385-2 SPX385-2.5 MIN. TYP. MAX. 2.475 2.500 PARAMETER 2.450 2.525 UNIT 2.500 2.550 V Dynamic Output Impedance F = 20Hz IR = 100µA 0.6 1.0 0.6 1.0 Reference Voltage Change with IR. 20µA IR 20mA 10 20 10 20 mV Temperature Coefficient Note 1 60 100 60 100 ppm/°C 15 20 15 20 Output Wideband Noise 10Hz f 10kHz 120 120 µVrms Long Term Stability T=1000Hr; TA = 25°C ±0.1°C 60 60 ppm Minimum Operating Current Operating Temperature -40 +85 -40 +85 µA °C Note 1. Three-point measurement guarantees the error band over the specified temperature range. *CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC) ppm 0 % mV 0 0 DVKA DVKA (mV) TC in mV/°C = DTA D -10 5000 TC in % /°C = 0.5 0 15 30 45 60 75 90 105 ( TC in ppm/°C = DVKA DVKA at 25°C ) x 100 DTA ( ) DVKA DVKA at 25°C x 106 DTA Junction Temperature (°C) 0.07 mV/°C 0.003 %/°C 27 ppm/°C Figure 2. VKA vs. Temperature Date: 11/05/04 SPX385-2 SPX385-2.5 Micropower Voltage Reference 2 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 30 VKA Temperature Range: 0°C to 85°C 25 VIN 20 IK - Cathode Current (mA) VKA IK 15 10 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 30 IK - Cathode Current (µA) VKA - Voltage (V) 2.51 2.50 VREF = 2.500V at 25°C 2.49 2.48 2.47 85°C 15 25°C -0°C 0 2.46 2.45 -60 -30 0 30 60 90 -1.0 120 0 SPX385-2 SPX385-2.5 * IOUT = 2.5V R2 C1 150pF 3 + R1 68k 7 2 7 6 LM312 LM312 3 4 IOUT* C1 150pF 6 LM312 LM312 3.0 SPX385-2 SPX385-2.5 30V * IOUT = 2.5V R2 2 2.0 Figure 6. Low Current Operating Characteristics Figure 5. Reference Voltage vs. Ambient Temperature R1 68k 1.0 VKA - Cathode Voltage (V) TA - Ambient Temperature (°C) R2 IOUT* -1.5V to -27V + 4 R2 1.5V to 27V -30V Figure 7b. Precision 1µA to 1mA Current Source Figure 7a. Precision 1µA to 1mA Current Sink Date: 11/05/04 SPX385-2 SPX385-2.5 Micropower Voltage Reference 3 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 9V VIN 5V LM338 LM338 200k 375 SPX385-2 SPX385-2.5 2.5V SPX385-2 SPX385-2.5 120 Figure 8. Improving Regulation of Adjustable Regulators Figure 9. Micropower Reference from 9V Battery IQ VIN = 15V VIN = 3.7V to 30V 500k 7 + 3 LM4250C LM4250C 8 2 LM334 LM334 3.3k 6 10V 4 OUT 2.5V 1.5M 150pF 22M SPX385-2 SPX385-2.5 500k SPX385-2 SPX385-2.5 IQ 30µA Standby Current Figure 11: Precision Micropower 10V Reference Figure 10. Wide Input Range Reference PACKAGE PINOUTS 8-Pin NSOIC SOT-23-3 (M) TO-92 (N) SOT-89 (M1) 3 N/C 1 8 CATHODE N/C 2 7 N/C N/C 3 6 4 5 1 N/C ANODE N/C N/C 1 CATHODE 1 2 ANODE 2 2 3 3 N/C ANODE CATHODE ANODE N/C CATHODE Top View Date: 11/05/04 Top View Top View SPX385-2 SPX385-2.5 Micropower Voltage Reference 4 Bottom View © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN SOT-23 D b B 3 B E1 1 SEE VIEW C E VIEW A-A 2 e Gauge Plane e1 Seating Plane L Ø L1 VIEW C A A2 A Seating Plane 3 Pin SOT-23 SYMBOL A A1 A2 b c D e e1 E E1 L L1 ø JEDEC TO-236 (AB) Variation MIN NOM MAX 0.89 1.12 0.01 0.1 0.88 0.95 1.02 0.3 0.5 0.08 0.2 2.8 2.9 3.04 0.95 BSC 1.90 BSC 0.95 2.64 1.2 1.3 1.4 0.4 0.5 0.6 0.54 REF 0º 8º A SIDE VIEW b WITH PLATING c Note: Dimensions in (mm) Date: 11/05/04 C A1 BASE METAL SECTION B-B SPX385-2 SPX385-2.5 Micropower Voltage Reference 5 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN SOT-89 D D1 3 Ø1.0 E H 5º(2x) L 1 2 e e1 C SYMBOL b L b1 C D D1 H E e e1 3 Pin SOT-89 MIN NOM 0.36 0.42 0.8 0.41 0.47 0.38 0.4 4.4 4.5 1.4 1.6 3.94 2.4 2.5 1.45 1.5 2.9 3 8º(2x) MAX 0.48 1.2 0.53 0.43 4.6 1.75 4.25 2.6 1.55 3.1 Ro.15 b b1 b Note: Dimensions in (mm) Date: 11/05/04 SPX385-2 SPX385-2.5 Micropower Voltage Reference 6 © Copyright 2004 Sipex Corporation PACKAGE: 8 PIN NSOIC D Ø e E/2 L2 E1/2 E1 E Seating Plane L1 1 Ø L Ø1 Gauge Plane VIEW C b INDEX AREA (D/2 X E1/2) TOP VIEW A1 A Seating Plane A2 8 Pin NSOIC JEDEC MO-012 MO-012 (AA) Variation MIN NOM MAX SYMBOL A 1.35 1.75 A1 0.1 0.25 A2 1.25 1.65 b 0.31 0.51 c 0.17 0.24 4.90 BSC D 6.00 BSC E 3.90 BSC E1 1.27 BSC e L 0.4 1.27 1.04 REF L1 0.25 BSC L2 ø 0º 8º ø1 5º 15º SIDE VIEW B B SEE VIEW C b c Note: Dimensions in (mm) BASE METAL SECTION B-B WITH PLATING Date: 11/05/04 SPX385-2 SPX385-2.5 Micropower Voltage Reference 7 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-92 L e1 e W D A b S1 SYMBOL A b E e e1 L R S1 W D a 3 Pin TO-92 MIN NOM 0.17 0.014 0.13 0.95 0.045 0.5 0.085 0.045 0.016 0.175 4º - MAX 0.195 0.02 0.155 0.105 0.055 0.61 0.095 0.06 0.022 0.195 6º R E Note: Dimensions in (inches) Date: 11/05/04 a(2x) SPX385-2 SPX385-2.5 Micropower Voltage Reference 8 © Copyright 2004 Sipex Corporation ORDERING INFORMATION Part Number Accuracy Output Voltage Package Type SPX385AM-2 SPX385AM-2.5 1.0% 2.5V 3-Pin SOT-23 SPX385AM-2 SPX385AM-2.5/TR 1.0% 2.5V 3-Pin SOT-23 SPX385AM1-2 SPX385AM1-2.5 1.0% 2.5V 3-Pin SOT-89 SPX385AM1-2 SPX385AM1-2.5/TR 1.0% 2.5V 3-Pin SOT-89 SPX385AS-2 SPX385AS-2.5 1.0% 2.5V 8-Pin NSOIC SPX385AS-2 SPX385AS-2.5/TR 1.0% 2.5V 8-Pin NSOIC SPX385AN-2 SPX385AN-2.5 1.0% 2.5V 3-Pin TO-92 SPX385AN-2 SPX385AN-2.5/TR 1.0% 2.5V 3-Pin TO-92 SPX385M-2 SPX385M-2.5 2.0% 2.5V 3-Pin SOT-23 SPX385M-2 SPX385M-2.5/TR 2.0% 2.5V 3-Pin SOT-23 SPX385M1-2 SPX385M1-2.5 2.0% 2.5V 3-Pin SOT-89 SPX385M1-2 SPX385M1-2.5/TR 2.0% 2.5V 3-Pin SOT-89 SPX385S-2 SPX385S-2.5 2.0% 2.5V 8-Pin NSOIC SPX385S-2 SPX385S-2.5/TR 2.0% 2.5V 8-Pin NSOIC SPX385N-2 SPX385N-2.5 2.0% 2.5V 3-Pin TO-92 SPX385N-2 SPX385N-2.5/TR 2.0% 2.5V 3-Pin TO-92 Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX385S-2 SPX385S-2.5/TR = standard; SPX385S-L-2 SPX385S-L-2.5/TR = lead free /TR = Tape and Reel Pack quantity is 2000 for TO-92 and 2500 for SOT-23, SOT-89 and NSOIC. 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: 11/05/04 SPX385-2 SPX385-2.5 Micropower Voltage Reference 9 © Copyright 2004 Sipex Corporation