SPX385AS-L-2-5

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 ■ Dynamic Impedance .............................. 1Ω max 3 Pin SOT-23 ■ Offered in SOT-23, TO-92, SOIC, and SOT-89 ■ Improved Replacement for LM185/285/385-2.5V, Cathode Anode AS385-2.5 Now Available in Lead Free Packaging ■ Temp Co 140ppm/°C 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 SPX385-2.5 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 SPX385-2.5 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 - SPX385-1.2 and SPX385-5. BLOCK DIAGRAM Cathode (K) 500k + 500k 1.25V Figure 1: Block Diagram Date: 02/29/2008 Anode (A) SPX385-2.5 Micropower Voltage Reference 1 © Copyright 2008 Exar 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 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 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-8 175°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. PARAMETER CONDITIONS Reference Voltage SPX385A-2.5 MIN. TYP. MAX SPX385-2.5 MIN. TYP. MAX. 2.475 2.500 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 Ω Reference Voltage Change with IR. 20µA ≤ IR ≤ 20mA 10 20 10 20 mV Temperature Coefficient Note 1 80 140 80 140 ppm/°C 15 20 15 20 Minimum Operating Current µA Output Wideband Noise 10Hz ≤ f ≤ 10kHz 120 120 µVrms Long Term Stability T=1000Hr; TA = 25°C ±0.1°C 60 60 ppm Operating Temperature -40 +85 -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 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: 02/29/208 SPX385-2.5 Micropower Voltage Reference 2 © Copyright 2008 Exar 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 SPX385-2.5 * IOUT = 2.5V R2 C1 150pF – 3 + R1 68k 7 2 7 – 6 LM312 3 4 IOUT* C1 150pF 6 LM312 3.0 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: 02/29/2008 SPX385-2.5 Micropower Voltage Reference 3 © Copyright 2008 Exar Corporation TYPICAL PERFORMANCE CHARACTERISTICS 9V VIN 5V LM338 200k 375 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 = 15V VIN = 3.7V to 30V 500k 7 + 3 LM4250C 8 2 LM334 3.3k 6 10V 4 OUT 2.5V 1.5M 150pF 22M SPX385-2.5 500k 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 2 CATHODE ANODE 1 2 2 3 3 N/C ANODE CATHODE ANODE N/C CATHODE Top View Date: 02/29/2008 Top View Top View SPX385-2.5 Micropower Voltage Reference 4 Bottom View © Copyright 2008 Exar 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: 02/29/2008 C A1 BASE METAL SECTION B-B SPX385-2.5 Micropower Voltage Reference 5 © Copyright 2008 Exar 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: 02/29/2008 SPX385-2.5 Micropower Voltage Reference 6 © Copyright 2008 Exar 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 (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 D 4.90 BSC E 6.00 BSC E1 3.90 BSC e 1.27 BSC L 0.4 1.27 L1 1.04 REF L2 0.25 BSC 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: 02/29/2008 SPX385-2.5 Micropower Voltage Reference 7 © Copyright 2008 Exar 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: 02/29/2008 a(2x) SPX385-2.5 Micropower Voltage Reference 8 © Copyright 2008 Exar Corporation ORDERING INFORMATION Part Number Accuracy Output Voltage Package Type SPX385AM-2.5 1.0% 2.5V 3-Pin SOT-23 SPX385AM-2.5/TR 1.0% 2.5V 3-Pin SOT-23 SPX385AM1-2.5 1.0% 2.5V 3-Pin SOT-89 SPX385AM1-2.5/TR 1.0% 2.5V 3-Pin SOT-89 SPX385AS-2.5 1.0% 2.5V 8-Pin NSOIC SPX385AS-2.5/TR 1.0% 2.5V 8-Pin NSOIC SPX385AN-2.5 1.0% 2.5V 3-Pin TO-92 SPX385AN-2.5/TR 1.0% 2.5V 3-Pin TO-92 SPX385M-2.5 2.0% 2.5V 3-Pin SOT-23 SPX385M-2.5/TR 2.0% 2.5V 3-Pin SOT-23 SPX385M1-2.5 2.0% 2.5V 3-Pin SOT-89 SPX385M1-2.5/TR 2.0% 2.5V 3-Pin SOT-89 SPX385S-2.5 2.0% 2.5V 8-Pin NSOIC SPX385S-2.5/TR 2.0% 2.5V 8-Pin NSOIC SPX385N-2.5 2.0% 2.5V 3-Pin TO-92 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-2.5/TR = standard; 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. . Exar Corporation Headquarters and Sales Office: 48720 Kato Road Fremont, CA 94538 main: 510-668-7000 fax: 510-668-7030 Exar Corporation reserves the right to make changes to any products described herein. Exar 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: 02/29/2008 SPX385-2.5 Micropower Voltage Reference 9 © Copyright 2008 Exar Corporation