LM334 Sources Datasheet

LM334 Datasheet, PDF, Equivalent


Part Number

LM334

Description

3-Terminal Adjustable Current Sources

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download LM334 Datasheet


LM334
LM134, LM234, LM334
www.ti.com
SNVS746E – MARCH 2000 – REVISED MAY 2013
LM134/LM234/LM334 3-Terminal Adjustable Current Sources
Check for Samples: LM134, LM234, LM334
FEATURES
1
2 Operates From 1V to 40V
• 0.02%/V Current Regulation
• Programmable From 1μA to 10mA
• True 2-Terminal Operation
• Available as Fully Specified Temperature
Sensor
• ±3% Initial Accuracy
DESCRIPTION
The LM134/LM234/LM334 are 3-terminal adjustable
current sources featuring 10,000:1 range in operating
current, excellent current regulation and a wide
dynamic voltage range of 1V to 40V. Current is
established with one external resistor and no other
parts are required. Initial current accuracy is ±3%.
The LM134/LM234/LM334 are true floating current
sources with no separate power supply connections.
In addition, reverse applied voltages of up to 20V will
draw only a few dozen microamperes of current,
allowing the devices to act as both a rectifier and
current source in AC applications.
The sense voltage used to establish operating current
in the LM134 is 64mV at 25°C and is directly
proportional to absolute temperature (°K). The
simplest one external resistor connection, then,
generates a current with +0.33%/°C temperature
dependence. Zero drift operation can be obtained by
adding one extra resistor and a diode.
Applications for the current sources include bias
networks, surge protection, low power reference,
ramp generation, LED driver, and temperature
sensing. The LM234-3 and LM234-6 are specified as
true temperature sensors with ensured initial
accuracy of ±3°C and ±6°C, respectively. These
devices are ideal in remote sense applications
because series resistance in long wire runs does not
affect accuracy. In addition, only 2 wires are required.
The LM134 is specified over a temperature range of
55°C to +125°C, the LM234 from 25°C to +100°C
and the LM334 from 0°C to +70°C. These devices
are available in TO hermetic, TO-92 and SOIC-8
plastic packages.
Connection Diagrams
Figure 1. SOIC-8 Surface Mount Package
(LM334M; LM334M/NOPB; LM334MX;
LM334MX/NOPB)
See Package Number D
Figure 2. SOIC-8 Alternative Pinout Surface Mount
Package
(LM334SM; LM334SM/NOPB; LM334SMX;
LM334SMX/NOPB)
See Package Number D
Figure 3. TO Metal Can Package (Bottom View)
See Package Number NDV
Figure 4. TO-92 Plastic Package (Bottom View)
See Package Number LP
1
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.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2013, Texas Instruments Incorporated

LM334
LM134, LM234, LM334
SNVS746E – MARCH 2000 – REVISED MAY 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)
V+ to VForward Voltage
V+ to VReverse Voltage
R Pin to VVoltage
Set Current
Power Dissipation
ESD Susceptibility(3)
Operating Temperature Range(4)
Soldering Information
TO-92 Package (10 sec.)
TO Package (10 sec.)
SOIC Package
LM134/LM234/LM334
LM234-3/LM234-6
LM134
LM234/LM234-3/LM234-6
LM334
Vapor Phase (60 sec.)
Infrared (15 sec.)
40V
30V
20V
5V
10 mA
400 mW
2000V
55°C to +125°C
25°C to +100°C
0°C to +70°C
260°C
300°C
215°C
220°C
(1) “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) Human body model, 100pF discharged through a 1.5kΩ resistor.
(4) For elevated temperature operation, TJ max is:
LM134
LM234
LM334
150°C
125°C
100°C
See Thermal Characteristics.
Thermal Characteristics
over operating free-air temperature range (unless otherwise noted)
Thermal Resistance
TO-92
θja (Junction to Ambient)
180°C/W (0.4leads)
160°C/W (0.125leads)
θjc (Junction to Case)
N/A
TO
440°C/W
32°C/W
SOIC-8
165°C/W
80°C/W
2 Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LM134 LM234 LM334


Features LM134, LM234, LM334 www.ti.com SNVS746 E – MARCH 2000 – REVISED MAY 2013 LM134/LM234/LM334 3-Terminal Adjustable Current Sources Check for Samples: LM1 34, LM234, LM334 FEATURES 1 •2 Opera tes From 1V to 40V • 0.02%/V Current Regulation • Programmable From 1μA t o 10mA • True 2-Terminal Operation Available as Fully Specified Temperat ure Sensor • ±3% Initial Accuracy DE SCRIPTION The LM134/LM234/LM334 are 3-t erminal adjustable current sources feat uring 10,000:1 range in operating curre nt, excellent current regulation and a wide dynamic voltage range of 1V to 40V . Current is established with one exter nal resistor and no other parts are req uired. Initial current accuracy is ±3% . The LM134/LM234/LM334 are true floati ng current sources with no separate pow er supply connections. In addition, rev erse applied voltages of up to 20V will draw only a few dozen microamperes of current, allowing the devices to act as both a rectifier and current source in AC applications. The sense voltage used t.
Keywords LM334, datasheet, pdf, etcTI, 3-Terminal, Adjustable, Current, Sources, M334, 334, 34, LM33, LM3, LM, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)