 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| LM385-2.5/LM385B-2.5 Micropower Voltage Reference n FEATURES l l l l n DESCRIPTION The LM385-2.5 is a micropower 2-terminal bandgap voltage reference, which can operate in a 20A to 20mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to achieve tight voltage tolerance. Since the LM3852.5 bandgap reference uses only transistors and resistors, low noise and good long-term stability result. Careful design of the LM385-2.5 has made the device exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows for its use with widely varying supplies with excellent regulation. The extremely low power drain of the LM385-2.5 makes it useful for micropower circuitry. This voltage reference can be used to make portable meters, regulators, or general purpose analog circuitry with battery life approaching shelf life. Further, the wide operating current allows it to replace older references with a tighter tolerance. Operating Current from 20A to 20mA. Low Temperature Coefficient. 1% and 2% Initial Tolerance. Low Dynamic Impedance. n l l l l l l l APPLICATIONS Portable, Battery-Powered Equipment. Instrumentation. Process Control. Energy Management. Product Testing. Automotive. Precision Audio Components. n TYPICAL APPLICATION CIRCUIT VIN RS 2.5V + - LM385-2.5 Precision 2.500V Voltage Reference Analog Integrations Corporation 4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5772500 FAX: 886-3-5772510 w ww.analog.com.tw DS-385C-01 012102 1 LM385-2.5/LM385B-2.5 n ORDERING INFORMATION LM385X-2.5CXXX PACKING TYPE BG: BAG TB: TUBE (for SO-8) TR: TAPE & REEL PACKAGE TYPE S : SMALL OUTLINE U: SOT-23 X: SOT-89 Z: TO-92 TOLERANCE PIN CONFIGURATION SO-8 TOP VIEW NC NC NC 1 2 3 4 8+ 7 NC 6 NC 5 NC - Default: 2% B: 1% Example: LM385-2.5CSTR a 2% version, in SO-8 Package & Taping & Reel Packing Type (CS is not available in BAG packing type.) SOT-23 TOP VIEW 1: 2: + 3: NC 1 2 3 SOT-89 TOP VIEW 1: NC 2: 3: + 1 2 3 TO-92 TOP VIEW 1: NC 2: + 3: - 1 2 3 n ABSOLUTE MAXIMUM RATINGS Reverse Current ....... .................... ... ... ... ... ... ........................................................ 30mA Forward Current ... ... ... ....................................... .......... ... ... ... ..............................10mA .... ... ... ... ... ... ... ... ............... ... ......... ... ........ 0C to 70C Operating Temperature Range. Storage Temperature Lead Temperature TO-92 Package Soldering (10 seconds) SO Package Vapor phase (60 seconds) ..................... ... ... ... ... ... ... ... ................... 260C ............... ... ... ... ... ... ......... ... ................... 215C ................................ ... ... ... ........ ... ......................... -65C to 150C n TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. 2 LM385-2.5/LM385B-2.5 n ELECTRICAL CHARACTERISTICS (T =25C, unless otherwise specified.) A PARAMETER Reverse Breakdown Voltage Reverse Breakdown Voltage Change with Current TEST CONDITIONS IR=100A 20AIR 1mA 1mAIR 20mA LM385B-2.5 LM385-2.5 SYMBOL VR VR VR ZR IRMIN MIN. 2.475 2.450 TYP. 2.500 2.500 MAX. 2.525 2.550 2 20 UNIT V mV mV Reverse Dynamic Impedance IR=100A, f=20Hz Minimum Operating Current Wideband Noise (rms) Average Temperature Coefficient (Note) Long Term Stability Note : IR=100A, 10Hz f 10KHz IR=100A IR=100A, T=1000Hrs, TA=25C 1 13 120 100 20 20 A Vrms ppm/C ppm eN VR VR /t The average temperature coefficient is defined as the maximum deviation of reverse breakdown voltage at all measured temperatures from TMIN to TMAX, divided by TMAX - TMIN. The measured temperatures are 0C, 25C, 50C and 70C. 3 LM385-2.5/LM385B-2.5 n TYPICAL PERFORMANCE CHARACTERISTICS 3 8 2.5 Reverse Voltage (V) 125 C -25C 25C Output Voltage Change (mV) 6 2 -25C 25 C 4 1.5 2 1 80 C 0.5 0 0 0.1 Reverse Current ( A) Fig. 1 Reverse Characteristics 1 10 100 -2 0.01 0.1 1 10 100 Reverse Current (mA) Fig. 2 Reverse Characteristics 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0.01 2.5 2 Forward Voltage (V) Voltage Swing (V) Input (2) 1.5 1 0.5 0 12.5 Output 100K Output (1) -25C 25 C 125 C Input 0.1 1 10 100 0 200 400 600 800 1000 Forward Current (mA) Fig. 3 Forward Characteristics 2.52 1000 Time (S) Fig. 4 Response Time Reference Voltage (V) 800 2.51 2.5 Noise 600 400 2.49 200 2.48 -20 0 20 Temperature (C) 40 60 80 100 100 1000 1000 10000 Fig. 5 Temperature Drift Frequency (Hz) Fig. 6 Noise Voltage (n V / Hz ) 4 LM385-2.5/LM385B-2.5 n BLOCK DIAGRAM + 2.5V + 13A n SYMBOL + - - n PIN DESCRIPTIONS PIN + PIN PIN NC - sinks current with a range from 20A to 20mA for normal applications. And a stable positive voltage, relative to Pin-, occurs on Pin+. - Pin- sources current for normal application. The current value is the same as Pin+. - Not connected. n APPLICATION EXAMPLES LM385-2.5 C1 150pF 30V 7 6 4 R2 R1 68K IOUT -1.5V to -27V -30V 2 LM385-2.5 C1 150pF R1 68K IOUT 1.5V to 27V 2 3 + - + 3- 7 6 4 R2 IOUT = 2 . 5V R2 IOUT = 2 . 5V R2 Fig. 7 Precision 1A to 1mA Current Source 5 LM385-2.5/LM385B-2.5 n PHYSICAL DIMENSIONS l 8 LEAD PLASTIC SO (unit: mm) D SYMBOL A A1 H E MIN 1.35 0.10 0.33 0.19 4.80 3.80 MAX 1.75 0.25 0.51 0.25 5.00 4.00 1.27(TYP) 6.20 1.27 B C D E e e A C A1 H L L 5.80 0.40 B l SOT-23 (unit: mm) D C L E H 1 SYMBOL A A1 A2 b C D E MIN 1.00 -- 0.70 0.35 0.10 2.70 1.40 MAX 1.30 0.10 0.90 0.50 0.25 3.10 1.80 e A2 A A1 b e H L c1 1.90 (TYP) 2.60 0.37 1 3.00 -- 9 l SOT-23 MARKING Part No. LM385-25CU LM385B-25CU Marking AIA2 AIB2 6 LM385-2.5/LM385B-2.5 l SOT-89 (unit: mm) D D1 C A SYMBOL A B C D MIN 1.40 0.36 0.35 4.40 1.62 2.29 MAX 1.60 0.48 0.44 4.60 1.83 2.60 1.50 (TYP.) 3.00 (TYP.) H E D1 E e L e e1 B e1 H L 3.94 0.89 4.25 1.20 l TO-92 (unit: mm) L C E SYMBOL A C MIN 4.32 MAX 5.33 0.38 (TYP.) A e1 D D E e1 L 4.40 3.17 1.27 (TYP.) 12.7 5.20 4.20 - 7 |
Price & Availability of LM385B-25CZTB
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |