|
|
PDF LM194 Data sheet ( Hoja de datos )
| Número de pieza | LM194 | |
| Descripción | LM194/LM394 Supermatch Pair | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM194 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
December 1994
LM194 LM394 Supermatch Pair
General Description
The LM194 and LM394 are junction isolated ultra well-
matched monolithic NPN transistor pairs with an order of
magnitude improvement in matching over conventional tran-
sistor pairs This was accomplished by advanced linear pro-
cessing and a unique new device structure
Electrical characteristics of these devices such as drift ver-
sus initial offset voltage noise and the exponential relation-
ship of base-emitter voltage to collector current closely ap-
proach those of a theoretical transistor Extrinsic emitter
and base resistances are much lower than presently avail-
able pairs either monolithic or discrete giving extremely low
noise and theoretical operation over a wide current range
Most parameters are guaranteed over a current range of
1 mA to 1 mA and 0V up to 40V collector-base voltage
ensuring superior performance in nearly all applications
To guarantee long term stability of matching parameters
internal clamp diodes have been added across the emitter-
base junction of each transistor These prevent degradation
due to reverse biased emitter current the most common
cause of field failures in matched devices The parasitic iso-
lation junction formed by the diodes also clamps the sub-
strate region to the most negative emitter to ensure com-
plete isolation between devices
The LM194 and LM394 will provide a considerable improve-
ment in performance in most applications requiring a closely
matched transistor pair In many cases trimming can be
eliminated entirely improving reliability and decreasing
costs Additionally the low noise and high gain make this
device attractive even where matching is not critical
The LM194 and LM394 LM394B LM394C are available in
an isolated header 6-lead TO-5 metal can package The
LM394 LM394B LM394C are available in an 8-pin plastic
dual-in-line package The LM194 is identical to the LM394
except for tighter electrical specifications and wider temper-
ature range
Features
Y Emitter-base voltage matched to 50 mV
Y Offset voltage drift less than 0 1 mV C
Y Current gain (hFE) matched to 2%
Y Common-mode rejection ratio greater than 120 dB
Y Parameters guaranteed over 1 mA to 1 mA collector
current
Y Extremely low noise
Y Superior logging characteristics compared to
conventional pairs
Y Plug-in replacement for presently available devices
Typical Applications
Low Cost Accurate Square Root Circuit
IOUT e 10b5 010 VIN
Low Cost Accurate Squaring Circuit
IOUT e 10b6 (VIN)2
C1995 National Semiconductor Corporation TL H 9241
TL H 9241 – 1
Trim for full scale accuracy
TL H 9241 – 2
RRD-B30M115 Printed in U S A
1 page  
Typical Applications (Continued)
High Performance Instrumentation Amplifier
106
Gain e
RS
Performance Characteristics
G e 10 000 G e 1 000 G e 100 G e 10
Linearity of Gain (g10V Output)
s0 01 s0 01 s0 02 s0 05 %
Common-Mode Rejection Ratio (60 Hz)
t120
t120 t110 t90 dB
Common-Mode Rejection Ratio (1 kHz)
t110
t110 t90 t70 dB
Power Supply Rejection Ratio
aSupply
l110
l110 l110 l110 dB
bSupply
l110
l110 l90 l70 dB
Bandwidth (b3 dB)
50 50 50 50 kHz
Slew Rate
0 3 0 3 0 3 0 3 V ms
Offset Voltage Drift
s0 25
s0 4
2 s10 mV C
Common-Mode Input Resistance
l109
l109 l109 l109 X
Differential Input Resistance
l3 x 108
Input Referred Noise (100 Hz s f s 10 kHz)
5
Input Bias Current
75
l3 x 108 l3 x 108 l3 x 108 X
nV
6 12 70
0Hz
75 75 75 nA
Input Offset Current
1 5 1 5 1 5 1 5 nA
Common-Mode Range
g11
g11
g11 g10 V
Output Swing (RL e 10 kX)
g13
g13
g13 g13 V
Assumes s 5 ppm C tracking of resistors
TL H 9241 – 7
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LM194.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM19 | 2.4V/ 10uA/ TO-92 Temperature Sensor | National Semiconductor |
| LM19 | LM19 2.4V 10A TO-92 Temperature Sensor (Rev. E) |  Texas Instruments |
| LM190E01 | TFT LCD |  LG |
| LM190E01-C4 | TFt LCD | LG |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |