http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf


STMicroelectronics
STMicroelectronics

LM334D Datasheet

THREE TERMINAL ADJUSTABLE CURRENT SOURCES


LM334D Datasheet Preview


LM134-LM234
LM334
THREE TERMINAL ADJUSTABLE CURRENT SOURCES
.... OPERATES from 1V to 40V
0.02% V CURRENT REGULATION
PROGRAMMABLE from 1µA to 10mA
±3% INITIAL ACCURACY
DE SC RI P TI O N
The LM134/LM234/LM334 are 3-terminal adjust-
able current sources characterized by :
- an operating current range of 10000 : 1
- an excellent current regulation
- a wide dynamic voltage range of 1V to 40V
The current is determined by an external resistor
without requiring other external components.
Reverse voltages of up to 20V will only draw a cur-
rent of several microamperes. This enables the
circuit to operate as a rectifier and as a source of cur-
rent in a.c. applications.
For the LM134/LM234/LM334, the voltage on the
control pin is 64mV at +25oC and is directly propor-
tionalto the absolute temperature (oK). The simplest
external resistor connection generates a current
with 0.33%/oC temperature dependence. Zero
drift can be obtainedby adding an additionalresistor
and a diode to the external circuit.
Z
TO92
(Plastic Package)
D
SO8
(Plastic Micropackage)
ORDER CODES
Part Num-
ber
Temperature
Range
LM134
LM234
LM334
–55oC, +125oC
–25oC, +100oC
0oC, +70oC
Example : LM134Z
PIN CONNECTIONS
TO92
(Bottom view)
V + AD J
21
V-
3
SO8
(Top view)
NC NC V- NC
8 76 5
Package
ZD
••
••
••
October 1997
1 23 4
ADJ NC NC V+
1/10
Page 1

LM134-LM234-LM334
SCHEMATIC DIAGRAM
Q4 Q5
V
Q6
Q3
C1
50pF
Q2
Q1
ADJ
V
ABSOLUTE MAXIMUM RATING
Symbol
VADJ-
ISET
Ptot
Tstg
Toper
Parameter
Voltage V + to V
Forward
Reverse
ADJ Pin to V Voltage
Set Current
Power Dissipation
Storage Temperature Range
Operating Free-air Temperature Range
LM134
LM234
LM334
LM134 - LM234
LM334
40 30
20 20
55
10 10
400 400
–65 to +150
–55 to +125
–25 to +100
0 to +70
Unit
V
V
mA
mW
oC
oC
2/10
Page 2

LM134-LM234-LM334
ELECTRICAL CHARACTERISTICS
Tj = +25oC with pulse testing so that junction temperature does not change during testing
(unless otherwise specified)
Parameter
Set Current Error (V+ = +2.5V) - (note 1)
10µA ISET 1mA
1mA ISET 5mA
2µA ISET 10µA
Ratio of Set Current to VCurrent
10µA ISET 1mA
1mA ISET 5mA
2µA ISET 10µA
LM134 - LM234
Min. Typ. Max.
3
5
8
14 18 23
14
14
LM334
Min. Typ. Max.
6
8
12
14 18 26
14
14
Unit
%
Minimum Operating Voltage
2µA ISET 100µA
100µA ISET 1mA
1mA ISET 5mA
V
0.8 0.8
0.9 0.9
11
Average change in set current with input voltage
2µA
ISET
+1.5V
1mA
V+
+5V
+5V V+ +40V
1mA ISET
+1.5V
5mA
V+ +
+5V
+5V V+ +40V
0.02
0.01
0.03
0.02
0.05
0.03
0.02
0.01
0.03
0.02
0.1
0.05
%/V
Temperature Dependence of set current - (note 2)
25µA ISET 1mA
0.96 T T 1.04 T 0.96 T T 1.04 T
Effective Shunt Capacitance
15 15 pF
Notes :
1. Set current is the current flowing into theV+ pin. It is determined by the following formula Iset = 67.7mV/Rset
(Tj = +25oC).
Set current error is expressed as a percent deviation from this amount.
2. Iset is directly proportional to absolute temperature (oK). Iset at any temperature can be calculated from
Iset = IO (T/TO) where IO is Iset measured at TO (oK).
3/10
Page 3
Part Number LM334D
Manufactur STMicroelectronics
Description THREE TERMINAL ADJUSTABLE CURRENT SOURCES
Total Page 10 Pages
PDF Download
LM334D datasheet pdf
Download PDF File
LM334D view html
View PDF for Mobile


Related Datasheet

LM334 , LM334 , LM334 , LM334 , LM334D , LM334H , LM334M , LM334MX , LM334S8 , LM334SM , LM334SMX , LM334Z , LM334Z ,

site map

webmaste! click here

contact us

Buy Components