LM385BH-2.5 반도체 회로 부품 판매점
Micropower Voltage Reference
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 Linear Technology |
LM285-2.5, LM385-2.5, LM385B-2.5
MICROPOWER VOLTAGE REFERENCES
D Operating Current Range . . . 20 µA to
20 mA
D 1.5% and 3% Initial Voltage Tolerance
D Reference Impedance
– LM385 . . . 1 Ω Max at 25°C
– All Devices . . . 1.5 Ω Max Over Full
Temperature Range
D Very Low Power Consumption
D Applications:
– Portable Meter References
– Portable Test Instruments
– Battery-Operated Systems
– Current-Loop Instrumentation
– Panel Meters
D Interchangeable With Industry-Standard
LM285-2.5 and LM385-2.5
SLVS023H – JANUARY 1989 – REVISED AUGUST 2003
LM285-2.5 . . . D PACKAGE
LM385-2.5, LM385B-2.5 . . . D OR PW PACKAGE
(TOP VIEW)
NC
NC
NC
ANODE
1
2
3
4
8 CATHODE
7 NC
6 NC
5 NC
NC – No internal connection
LM285-2.5, LM385-2.5, LM385B-2.5 . . . LP PACKAGE
(TOP VIEW)
ANODE
CATHODE
NC
description/ordering information
NC – No internal connection
These micropower two-terminal band-gap voltage references operate over a 20-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
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SOIC (D)
Tube of 75
Reel of 2000
LM385D-2-5
LM385DR-2-5
385-25
Tube of 1000 LM385LP-2-5
3% TO226 / TO-92 (LP)
Reel of 2000 LM385LPR-2-5
385-25
0°C to 70°C
TSSOP (PW)
SOIC (D)
Tube of 150
Reel of 2000
Tube of 75
Reel of 2000
LM385PW-2-5
LM385PWR-2-5
LM385BD-2-5
LM385BDR-2-5
385-25
385B25
1.5%
Tube of 1000
TO226 / TO-92 (LP)
Reel of 2000
LM385BLP-2-5
LM385BLPR-2-5
385-25
TSSOP (PW)
Tube of 150
Reel of 2000
LM385BPW-2-5
LM385BPWR-2-5
385B25
–40°C to 85°C
1.5%
SOIC (D)
TO226 / TO-92 (LP)
Tube of 75
Reel of 2000
Tube of 1000
Reel of 2000
LM285D-2-5
LM285DR-2-5
LM285LP-2-5
LM285LPR-2-5
285-25
285-25
285-25
† 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.
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.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2003, Texas Instruments Incorporated
1
LM285-2.5, LM385-2.5, LM385B-2.5
MICROPOWER VOLTAGE REFERENCES
SLVS023H – JANUARY 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
Q1
Q2
7.5 kΩ
600 kΩ
Q12
Q4 Q7
Q3
Q11
20 pF
Q5
20 pF
Q6 Q8
Q13
200 kΩ
50 kΩ
Q10
300 kΩ
Q9
Q14
500 Ω
100 kΩ
500 Ω
60 kΩ
NOTE A: All component values shown are nominal.
500 Ω
ANODE
•2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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