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Part: LM285LP-1-2
Category:
Power Management
-> Voltage References
-> Shunt
Description: ti LM285-1.2, Micropower Voltage Reference
Company: Texas Instruments, Inc.
Datasheet: Download LM285LP-1-2 datasheet File size : 634 kB
Request For quote: Find where to buy LM285LP-1-2
Datasheet text preview:
LM285-1.2, LM385-1.2, LM385B-1.2 MICROPOWER VOLTAGE REFERENCES
SLVS075G APRIL 1989 REVISED AUGUST 2003
D D D D D
D
Operating Current Range LM285 . . . 10 µA to 20 mA LM385 . . . 15 µA to 20 mA LM385B . . . 15 µA to 20 mA 1% and 2% Initial Voltage Tolerance Reference Impedance LM385 . . . 1 Max at 25°C All Devices . . . 1.5 Max Over Full Temperature Range Very Low Power Consumption Applications Portable Meter References Portable Test Instruments Battery-Operated Systems Current-Loop Instrumentation Panel Meters Interchangeable With Industry Standard LM285-1.2 and LM385-1.2
LM285-1.2 . . . D PACKAGE LM385-1.2 . . . D, PS, OR PW PACKAGE LM385B-1.2 . . . D OR PW PACKAGE (TOP VIEW)
NC NC NC ANODE
1 2 3 4
8 7 6 5
CATHODE NC NC NC
NC No internal connection LM285-1.2, LM385-1.2, LM385B-1.2 . . . LP PACKAGE (TOP VIEW)
ANODE CATHODE NC
NC No internal connection
description/ordering information
These micropower, two-terminal, band-gap voltage references operate over a 10-µA to 20-mA current range and feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming provides tight voltage tolerance. The band-gap reference for these devices has low noise and long-term stability. ORDERING INFORMATION
TA VZ TOLERANCE SOIC (D) SOP (PS) 2% TO-226 / TO-92 (LP) TSSOP (PW) SOIC (D) 1% TO-226 / TO-92 (LP) TSSOP (PW) SOIC (D) PACKAGE Tube of 75 Reel of 2000 Reel of 2000 Tube of 1000 Reel of 2000 Tube of 150 Reel of 2000 Tube of 75 Reel of 2000 Tube of 1000 Reel of 2000 Tube of 150 Reel of 2000 Tube of 75 Reel of 2000 ORDERABLE PART NUMBER LM385D-1-2 LM385DR-1-2 LM385PSR-1-2 LM385LP-1-2 LM385LPR-1-2 LM385PW-1-2 LM385PWR-1-2 LM385BD-1-2 LM385BDR-1-2 LM385BLP-1-2 LM385BLPR-1-2 LM385BPW-1-2 LM385BPWR-1-2 LM285D-1-2 LM285DR-1-2 TOP-SIDE MARKING 385-12 L385-12 385-12 385-12 385B12 385-12 385B12 285-12
0°C to 70 C 70°C
85°C 40°C to 85 C
1%
TO-226 / TO-92 (LP) Tube of 1000 LM285LP-1-2 285-12 Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
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· DALLAS, TEXAS 75265
1
LM285-1.2, LM385-1.2, LM385B-1.2 MICROPOWER VOLTAGE REFERENCES
SLVS075G APRIL 1989 REVISED AUGUST 2003
description/ordering information (continued)
The design makes these devices exceptionally tolerant of capacitive loading and, thus, easier to use in most reference applications. The wide dynamic operating temperature range accommodates varying current supplies, with excellent regulation. The extremely low power drain of this series makes them useful for micropower circuitry. These voltage references can be used to make portable meters, regulators, or general-purpose analog circuitry, with battery life approaching shelf life. The wide operating current range allows them to replace older references with tighter-tolerance parts.
symbol
ANODE CATHODE
schematic
CATHODE Q13 7.5 k 600 k Q12 Q7 Q4 Q11 50 k Q3 Q1 20 pF Q2 Q5 20 pF Q9 Q10 300 k
200 k
Q6
Q8 Q14
100 k
500
60 k ANODE
NOTE A: Component values shown are nominal.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
LM285-1.2, LM385-1.2, LM385B-1.2 MICROPOWER VOLTAGE REFERENCES
SLVS075G APRIL 1989 REVISED AUGUST 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Reverse current, IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Forward current, IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA Package thermal impedance, JA (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 140°C/W PS package . . . . . . . . . . . . . . . . . . . . . . . . . . . 95°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) TA)/JA. Operation at the absolute maximum TJ of 150°C can affect reliability. 2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN IZ TA Reference current Operating free-air temperature range LM285-1.2 LM385-1.2, LM385B-1.2 0.01 40 0 MAX 20 85 70 UNIT mA °C
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
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