® SPX385-1.2 Micropower Voltage Reference FEATURES ■ Low Output Voltage ................................ 1.235V ■ Dynamic Impedance...............................1Ω max ■ Low Temperature Coefficient........30ppm/°C (typ) 8 ANODE ■ Operating Current ........................ 10µA to 20mA N/C 1 SPX385-1.2 ■ Extended Temperature Range .. -40°C to +85°C 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 10µA 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 -40°C to 85°C. 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 1 © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS TYPICAL THERMAL RESISTANCES Reverse Current (IKA)) ................................................................. 30mA Forward Current (IAK) .................................................................. 10mA Operating Temperature Range (TA) ................................. -40 to +85°C Continuos Power Dissipation at 25°C (PD) TO-92 ................................................................... 775mW SOIC-8 ................................................................. 750mW SOT-89 ............................................................... 1000mW Junction Temperature (TJ) .......................................................... 150°C Storage Temperature (TSTG) ............................................ - 65 to 150°C Lead Temperature (Soldering 10 sec.), TL .................................. 300°C PACKAGE 0JA 0JA TYPICAL DERATING TO-92 160°C/W 80°C/W 6.3 mW/°C SOIC-8 175°C/W 45°C/W 5.7mW/°C SOT-89 110°C/W 8°C/W 9.1mW/°C 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. ELECTRICAL CHARACTERISTICS IIN = 100µA, TA = 25°C, unless otherwise specified. PARAMETER CONDITIONS Reference Voltage SPX385A-1.2 MIN. TYP. MAX SPX385-1.2 MIN. TYP. MAX. 1.223 1.205 1.235 1.235 1.247 UNIT 1.260 V Dynamic Output Impedance F = 20Hz IR = 100µA 0.6 1.0 0.6 1.0 Ω Reference Voltage Change with IR 10µA ≤ IR ≤ 20mA 10 20 10 20 mV Temperature Coefficient Note 1 30 50 30 50 ppm/°C 8 10 8 10 10Hz ≤ f ≤ 10kHz 60 Minimum Operating Current Output Wideband Noise Operating Temperature -40 60 +85 µA µVrms -40 +85 °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 ∆VKA ∆VKA (mV) TC in mV/°C = ∆TA ∆T -5 5000 TC in % /°C = 0.5 0 15 30 45 60 75 90 105 ( TC in ppm/°C = ∆VKA ∆VKA at 25°C ) x 100 ∆TA ( ) ∆VKA ∆VKA at 25°C x 106 ∆TA 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 2 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 30 Temperature Range: 0°C to 85°C 25 VIN VKA = VREF IK - Cathode Current (mA) 20 IK 15 10 5 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 Temperature Range: 0°C to 85°C 1.245 12 IK - Cathode Current (µA) VREF - Reference Voltage (V) 1.240 1.235 1.230 1.225 1.200 85 °C 6 25 °C -0 °C 0 ≈ 1.150 1.100 -60 -30 0 30 60 90 -1.0 120 -0.5 0.5 SPX385-1.2 * IOUT = 1.23V R2 C1 150pF – 3 + R1 100k 7 2 – 7 6 LM312 3 4 IOUT* C1 150pF 6 LM312 1.5 SPX385-1.2 30V * IOUT = 1.23V R2 2 1.0 Figure 6. Low Current Operating Characteristics Figure 5. Reference Voltage vs. Ambient Temperature R1 100k 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: 5/25/04 SPX385-1.2 Micropower Voltage Reference 3 © Copyright 2004 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 9V 1.5V 500k 3k 1.2V 1.2V SPX385-1.2 SPX385-1.2 Figure 8. Reference from 1.5V Battery Figure 9. Micropower Reference from 9V Battery IQ VIN = 15V VIN = 2.3V to 30V 1M 7 + 3 LM4250C 8 2 LM334 4.3k 6 10V 4 22M OUT 1.2V 150pF 3.5M SPX385-1.2 500k SPX385-1.2 IQ ≅ 20µA Standby Current Figure 11: Precision Micropower 10V Reference Figure 10. Wide Input Range Reference Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference 4 © Copyright 2004 Sipex Corporation PACKAGE: 8 PIN NSOIC D e E/2 E1 E SEE VIEW C E1/2 1 b INDEX AREA (D/2 X E1/2) Ø1 TOP VIEW L2 Seating Plane Ø1 Gauge Plane Ø L L1 VIEW C A2 A SEATING PLANE A1 SIDE VIEW 8 Pin NSOIC (JEDEC MS-012, AA - VARIATION) b WITH PLATING DIMENSIONS Minimum/Maximum (mm) COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c D E E1 e L L1 L2 Ø Ø1 Date: 5/25/04 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 0º 8º 5º 15º c BASE METAL CONTACT AREA 8 PIN NSOIC SPX385-1.2 Micropower Voltage Reference 5 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN TO-92 L e1 e 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 4º - MAX R 4.95 0.51 3.94 2.67 1.40 15.49 2.41 1.52 0.56 E 4.95 6º ∂(2x) 3 PIN TO-92 Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference 6 © Copyright 2004 Sipex Corporation PACKAGE: 3 PIN SOT-89 D D1 3 Ø1.0 H E 5’(2x) 1 2 e e1 C 3 PIN SOT-89 LINGSEN # PO-SOT-004 A Dimensions in (mm) MIN NOM MAX 1.40 1.50 1.60 b 0.36 0.42 0.48 b1 0.41 0.47 0.53 C 0.38 0.40 0.43 D 4.40 4.50 4.60 D1 1.40 1.60 1.75 E 2.40 2.50 2.60 e 1.45 1.50 1.55 e1 2.90 3.00 3.10 3.94 - 4.25 - 1.20 H L 0.80 B’(2x) RO.15 b b1 b 3 PIN SOT-89 Date: 5/25/04 SPX385-1.2 Micropower Voltage Reference 7 © Copyright 2004 Sipex Corporation PINOUTS 8-Pin Surface Mount (S) SOT-89 (M1) N/C 1 8 ANODE N/C 2 7 N/C N/C 3 6 N/C CATHODE 4 5 N/C TO-92 (N) 1 3 3 2 CATHODE N/C ANODE Top View 2 1 ANODE N/C Top View CATHODE Bottom View ORDERING INFORMATION Part Number Accuracy Output Voltage Package Type SPX385AM1-1.2 1.0% 1.235V 3-Pin SOT-89 SPX385AM1-1.2/TR 1.0% 1.235V 3-Pin SOT-89 SPX385AS-1.2 1.0% 1.235V 8-Pin NSOIC SPX385AS-1.2/TR 1.0% 1.235V 8-Pin NSOIC SPX385AN-1.2 1.0% 1.235V 3-Pin TO-92 SPX385AN-1.2/TR 1.0% 1.235V 3-Pin TO-92 SPX385M1-1.2 2.0% 1.235V 3-Pin SOT-89 SPX385M1-1.2/TR 2.0% 1.235V 3-Pin SOT-89 SPX385S-1.2 2.0% 1.235V 8-Pin NSOIC SPX385S-1.2/TR 2.0% 1.235V 8-Pin NSOIC SPX385N-1.2 2.0% 1.235V 3-Pin TO-92 SPX385N-1.2/TR 2.0% 1.235V 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 ® Headquarters and Sales Office: 233 Hillview Dr Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 ANALOG EXCELLENCE 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 8 © Copyright 2004 Sipex Corporation