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PDF LMC6001 Data sheet ( Hoja de datos )
| Número de pieza | LMC6001 | |
| Descripción | Ultra Ultra-Low Input Current Amplifier | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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March 1995
LMC6001
Ultra Ultra-Low Input Current Amplifier
General Description
Featuring 100% tested input currents of 25 fA max., low op-
erating power, and ESD protection of 2000V, the LMC6001
achieves a new industry benchmark for low input current op-
erational amplifiers. By tightly controlling the molding com-
pound, National is able to offer this ultra-low input current in
a lower cost molded package.
To avoid long turn-on settling times common in other low in-
put current opamps, the LMC6001A is tested 3 times in the
first minute of operation. Even units that meet the 25 fA limit
are rejected if they drift.
Because of the ultra-low input current noise of 0.13 fA/√Hz,
the LMC6001 can provide almost noiseless amplification of
high resistance signal sources. Adding only 1 dB at 100 kΩ,
0.1 dB at 1 MΩ and 0.01 dB or less from 10 MΩ to 2,000 MΩ,
the LMC6001 is an almost noiseless amplifier.
The LMC6001 is ideally suited for electrometer applications
requiring ultra-low input leakage such as sensitive photode-
tection transimpedance amplifiers and sensor amplifiers.
Since input referred noise is only 22 nV/√Hz, the LMC6001
can achieve higher signal to noise ratio than JFET input type
electrometer amplifiers. Other applications of the LMC6001
include long interval integrators, ultra-high input impedance
instrumentation amplifiers, and sensitive electrical-field mea-
surement circuits.
Features
(Max limit, 25˚C unless otherwise noted)
n Input current (100% tested): 25 fA
n Input current over temp.: 2 pA
n Low power: 750 µA
n Low VOS: 350 µV
n Low noise: 22 nV/√Hz @1 kHz Typ.
Applications
n Electrometer amplifier
n Photodiode preamplifier
n Ion detector
n A.T.E. leakage testing
Connection Diagrams
8-Pin DIP
8-Pin Metal Can
Top View
DS011887-1
Top View
DS011887-2
© 1999 National Semiconductor Corporation DS011887
www.national.com
1 page  
AC Electrical Characteristics
Limits in standard typeface guaranteed
otherwise specified, V+ = 5V, V− = 0V,
fVoCr MTJ==1.255V˚CanadndRlLim>its1Min.
boldface
type
apply
at
the
temperature
extremes.
Unless
Symbol
Parameter
Conditions
Typical
Limits (Note 5)
Units
(Note 4) LM6001AI LM6001BI LM6001CI
SR Slew Rate
(Note 7)
1.5 0.8 0.8 0.8 V/µs
0.6 0.6 0.6 min
GBW Gain-Bandwidth Product
1.3
MHz
φfm
GM
en
in
THD
Phase Margin
Gain Margin
Input-Referred Voltage Noise
Input-Referred Current Noise
Total Harmonic Distortion
F = 1 kHz
F = 1 kHz
F = 10 kHz, AV = −10,
RL = 100 kΩ,
VO = 8 VPP
50
17
22
0.13
0.01
Deg
dB
nV/√Hz
fA/√Hz
%
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed.
Note 2: Applies to both single supply and split supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maxi-
mum allowed junction temperature of 150˚C. Output currents in excess of ±30 mA over long term may adversely affect reliability.
Note 3: The maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(max) − TA)/θJA.
Note 4: Typical values represent the most likely parametric norm.
Note 5: All limits are guaranteed by testing or statistical analysis.
Note 6: V+ = 15V, VCM = 7.5V and RL connected to 7.5V. For Sourcing tests, 7.5V ≤ VO ≤ 11.5V. For Sinking tests, 2.5V ≤ VO ≤ 7.5V.
Note 7: V+ = 15V. Connected as Voltage Follower with 10V step input. Limit specified is the lower of the positive and negative slew rates.
Note 8: For operating at elevated temperatures the device must be derated based on the thermal resistance θJA with PD = (TJ − TA)/θJA.
Note 9: Human body model, 1.5 kΩ in series with 100 pF.
Note 10: Do not connect the output to V+, when V+ is greater than 13V or reliability will be adversely affected.
Note 11: All numbers apply for packages soldered directly into a printed circuit board.
5 www.national.com
5 Page 
Ultra-Low Input Current Instrumentation Amplifier (Continued)
If R1 = R5, R3 = R6, and R4 = R7; then
DS011887-13
∴AV ≈ 100 for circuit shown (R2 = 9.85k).
FIGURE 8. Instrumentation Amplifier
11 www.national.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LMC6001.PDF ] | |
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