The LPC661 CMOS operational amplifier is ideal for operation from a single supply. It features a wide range of operating supply voltage from +5V to +15V,rail-to-rail output swing
and an input common-mode range that includes ground.
Performance limitations that have plagued CMOS amplifiers
in the past are not a problem with this design. Input V
drift, and broadband noise as well as voltage gain (into 100
kΩ and 5 kΩ) are all equal to or better than widely accepted
bipolar equivalents, while the supply current requirement is
typically 55 µA.
This chip is built with National’s advanced Double-Poly
Silicon-Gate CMOS process.
See the LPC660 datasheet for a Quad CMOS operational
amplifier or the LPC662 data sheet for a Dual CMOS operational amplifier with these same features.
Features
(Typical unless otherwise noted)
n Rail-to-rail output swing
n Low supply current 55 µA
n Specified for 100 kΩ and5kΩloads
n High voltage gain 120 dB
n Low input offset voltage 3 mV
n Low offset voltage drift 1.3 µV/˚C
n Ultra low input bias current 2 fA
n Input common-mode range includes GND
,
OS
n Operating range from +5V to +15V
n Low distortion 0.01%at 1 kHz
n Slew rate 0.11 V/µs
Applications
n High-impedance buffer
n Precision current-to-voltage converter
n Long-term integrator
n High-impedance preamplifier
n Active filter
n Sample-and-Hold circuit
n Peak detector
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
Differential Input Voltage
Output Short Circuit to V
Output Short Circuit to V
Storage Temperature Range−65˚C to +150˚C
Lead Temperature
(Soldering, 10 sec.)260˚C
Junction Temperature (Note 3)150˚C
Power Dissipation(Note 3)
ESD Rating
(C=100 pF, R=1.5 kΩ)1000V
Current at Input Pin
+−V−
)16V
+
−
±
Supply Voltage
(Notes 2, 9)
(Note 2)
±
5mA
Current at Output Pin
Voltage Input/Output Pin(V
+
) +0.3V, (V−) −0.3V
±
18 mA
Current at Power Supply Pin35 mA
Operating Ratings (Note 1)
Supply Voltage4.75V ≤ V
Junction Temperature Range
LPC661AM−55˚C ≤ T
LPC661AI−40˚C ≤ T
LPC661I−40˚C ≤ T
Power Dissipation(Note 7)
Thermal Resistance (θ
) (Note 8)
JA
8-Pin DIP101˚C/W
8-Pin SO165˚C/W
+
≤ 15.5V
≤ +125˚C
J
≤ +85˚C
J
≤ +85˚C
J
DC Electrical Characteristics
The following specifications apply for V
face limits apply at the temperature extremes; all other limits T
+
−
=
5V, V
=
0V, V
=
1.5V, V
CM
J
=
25˚C.
=
2.5V, and R
O
=
1M unless otherwise noted. Bold-
L
LPC661AMLPC661AILPC661IUnits
SymbolParameterConditionsTypLimitLimitLimit
(Note 4)(Note 4)(Note 4)
V
Input Offset Voltage1336mV
OS
3.53.36.3
TCV
Input Offset Voltage1.3µV/˚C
OS
Average Drift
I
Input Bias Current0.00220pA
B
10044max
I
Input Offset Current0.00120pA
OS
10022max
R
IN
Input Resistance
CMRRCommon Mode0V ≤ V
+
Rejection RatioV
=
+PSRRPositive Power Supply5V ≤ V
≤ 12.0V83707063dB
CM
15V686861min
+
≤ 15V83707063dB
>
1Tera Ω
Rejection Ratio686861min
−PSRRNegative Power Supply0V ≤ V
−
≤ −10V94848474dB
Rejection Ratio828373min
+
V
Input Common ModeV
CM
=
5V and 15V−0.4−0.1−0.1−0.1V
Voltage Rangefor CMRR ≥ 50 dB000max
+
V
− 1.9V+− 2.3V+− 2.3V+− 2.3V
A
Large SignalSourcing1000400400300V/mV
V
Voltage GainR
=
100 kΩ (Note 5)250300200min
L
+
V
− 2.6V+− 2.5V+− 2.5min
Sinking50018018090V/mV
=
R
100 kΩ (Note 5)7012070min
L
Sourcing1000200200100V/mV
=
R
5kΩ(Note 5)15016080min
L
Sinking25010010050V/mV
=
R
5kΩ(Note 5)356040min
L
(Limit)
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DC Electrical Characteristics (Continued)
The following specifications apply for V
face limits apply at the temperature extremes; all other limits T
+
SymbolParameterConditionsTypLimitLimitLimit
Output SwingV
V
O
R
V
R
V
R
V
R
I
Output CurrentSourcing, V
O
+
=
V
5V121411min
Sinking, V
I
Output CurrentSourcing, V
O
+
=
V
15V192520min
Sinking, V
(Note 9)192419min
I
Supply CurrentV
S
V
−
=
5V, V
=
0V, V
=
1.5V, V
CM
J
=
25˚C.
=
2.5V, and R
O
=
1M unless otherwise noted. Bold-
L
LPC661AMLPC661AILPC661IUnits
(Note 4)(Note 4)(Note 4)
+
=
5V4.9874.9704.9704.940V
=
100 kΩ to 2.5V4.9504.9504.910min
L
0.0040.0300.0300.060V
0.0500.0500.090max
+
=
5V4.9404.8504.8504.750V
=
5kΩto 2.5V4.7504.7504.650min
L
0.0400.1500.1500.250V
0.2500.2500.350max
+
=
15V14.97014.92014.92014.880V
=
100 kΩ to 7.5V14.88014.88014.820min
L
0.0070.0300.0300.060V
0.0500.0500.090max
+
=
15V14.84014.68014.68014.580V
=
5kΩto 7.5V14.60014.60014.480min
L
0.1100.2200.2200.320V
0.3000.3000.400max
=
0V22161613mA
O
=
5V21161613mA
O
121411min
=
0V40192823mA
O
=
13V39192823mA
O
+
=
5V, V
=
1.5V55606070µA
O
707085max
+
=
15V, V
=
1.5V58757590µA
O
8585105max
(Limit)
AC Electrical Characteristics
The following specifications apply for V
face limits apply at the temperature extremes; all other limits T
SymbolParameterConditionsTypLimitLimitLimit
+
=
5V, V
−
=
0V, V
=
CM
J
1.5V, V
=
25˚C.
=
2.5V, and R
O
=
1M unless otherwise noted. Bold-
L
LPC661AM LPC661AI LPC661IUnits
(Limit)
(Note 4)(Note 4)(Note 4)
SRSlew Rate(Note 6)0.110.070.070.05V/µs
0.040.050.03min
GBWGain-Bandwidth Product350kHz
φmPhase Margin50Deg
G
Gain Margin17dB
M
e
Input Referred Voltage NoiseF=1 kHz42nV/√Hz
n
i
Input Referred Current NoiseF=1 kHz0.0002pA/√Hz
n
T.H.D. Total Harmonic DistortionF=1 kHz, A
=
R
L
+
=
V
V
100 kΩ,V
15V
=
−100.01
=
8V
O
PP
www.national.com3
%
AC Electrical Characteristics (Continued)
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 bothsinglesupplyand split supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150˚C. Output currents in excess of
Note 3: The maximum power dissipation is a function of T
(T
)/θJA.
J(max)–TA
Note 4: Limits are guaranteed by testing or correlation.
Note 5: V+=15V, V
Note 6: V+=15V. Connected as Voltage Follower with 10V step input. Number specified is the slower of the positive and negative slew rates.
Note 7: For operating at elevated temperatures the device must be derated based on the thermal resistance θ
Note 8: All numbers apply for packages soldered directly into a PC board.
Note 9: Do not connect output to V
CM
=
7.5V and R
connected to 7.5V. For sourcing tests, 7.5V ≤ VO≤ 11.5V. For sinking tests, 2.5V ≤ VO≤ 7.5V.
L
+
when V+is greater than 13V or reliability may be adversely affected.
J(max)
±
30 mA over long term may adversely affect reliability.
, θJAand TA. The maximum allowable power dissipation at any ambient temperature is P
=
JA
with P
)/θJA.
(T
D
J–TA
D
=
Typical Performance Characteristics V
Supply Current
vs Supply Voltage
DS011227-26
Output Characteristics
Current Sinking
DS011227-29
Input Bias Current
vs Temperature
Output Characteristics
Current Sourcing
=
±
S
7.5V, T
=
25˚C unless otherwise specified
A
Common-Mode Voltage Range
vs Temperature
DS011227-27
DS011227-28
Input Voltage Noise
vs Frequency
DS011227-30
DS011227-31
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