NSC LPC661IM, LPC661IMX Datasheet
LPC661
Low Power CMOS Operational Amplifier
General Description
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
OS
,
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
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
Connection Diagram
Ordering Information
Package Temperature Range NSC
Drawing
Transport
Media
Military Industrial
−55˚C to +125˚C −40˚C to +85˚C
8-Pin LPC661AIM M08A Tape and Reel
Small Outline LPC661IM Rail
8-Pin LPC661AMN LPC661AIN N08E Rail
Molded DIP LPC661IN
8-Pin DIP/SO
DS011227-1
May 1998
LPC661 Low Power CMOS Operational Amplifier
© 1999 National Semiconductor Corporation DS011227 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
+−V−
) 16V
Differential Input Voltage
±
Supply Voltage
Output Short Circuit to V
+
(Notes 2, 9)
Output Short Circuit to V
−
(Note 2)
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
±
5mA
Current at Output Pin
±
18 mA
Voltage Input/Output Pin (V
+
) +0.3V, (V−) −0.3V
Current at Power Supply Pin 35 mA
Operating Ratings (Note 1)
Supply Voltage 4.75V ≤ V
+
≤ 15.5V
Junction Temperature Range
LPC661AM −55˚C ≤ T
J
≤ +125˚C
LPC661AI −40˚C ≤ T
J
≤ +85˚C
LPC661I −40˚C ≤ T
J
≤ +85˚C
Power Dissipation (Note 7)
Thermal Resistance (θ
JA
) (Note 8)
8-Pin DIP 101˚C/W
8-Pin SO 165˚C/W
DC Electrical Characteristics
The following specifications apply for V
+
=
5V, V
−
=
0V, V
CM
=
1.5V, V
O
=
2.5V, and R
L
=
1M unless otherwise noted. Bold-
face limits apply at the temperature extremes; all other limits T
J
=
25˚C.
LPC661AM LPC661AI LPC661I Units
(Limit)
Symbol Parameter Conditions Typ Limit Limit Limit
(Note 4) (Note 4) (Note 4)
V
OS
Input Offset Voltage 1 3 3 6 mV
3.5 3.3 6.3
TCV
OS
Input Offset Voltage 1.3 µV/˚C
Average Drift
I
B
Input Bias Current 0.002 20 pA
100 4 4 max
I
OS
Input Offset Current 0.001 20 pA
100 2 2 max
R
IN
Input Resistance
>
1 Tera Ω
CMRR Common Mode 0V ≤ V
CM
≤ 12.0V 83 70 70 63 dB
Rejection Ratio V
+
=
15V 68 68 61 min
+PSRR Positive Power Supply 5V ≤ V
+
≤ 15V 83 70 70 63 dB
Rejection Ratio 68 68 61 min
−PSRR Negative Power Supply 0V ≤ V
−
≤ −10V 94 84 84 74 dB
Rejection Ratio 82 83 73 min
V
CM
Input Common Mode V
+
=
5V and 15V −0.4 −0.1 −0.1 −0.1 V
Voltage Range for CMRR ≥ 50 dB 000max
V
+
− 1.9 V+− 2.3 V+− 2.3 V+− 2.3 V
V
+
− 2.6 V+− 2.5 V+− 2.5 min
A
V
Large Signal Sourcing 1000 400 400 300 V/mV
Voltage Gain R
L
=
100 kΩ (Note 5) 250 300 200 min
Sinking 500 180 180 90 V/mV
R
L
=
100 kΩ (Note 5) 70 120 70 min
Sourcing 1000 200 200 100 V/mV
R
L
=
5kΩ(Note 5) 150 160 80 min
Sinking 250 100 100 50 V/mV
R
L
=
5kΩ(Note 5) 35 60 40 min
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DC Electrical Characteristics (Continued)
The following specifications apply for V
+
=
5V, V
−
=
0V, V
CM
=
1.5V, V
O
=
2.5V, and R
L
=
1M unless otherwise noted. Bold-
face limits apply at the temperature extremes; all other limits T
J
=
25˚C.
LPC661AM LPC661AI LPC661I Units
(Limit)
Symbol Parameter Conditions Typ Limit Limit Limit
(Note 4) (Note 4) (Note 4)
V
O
Output Swing V
+
=
5V 4.987 4.970 4.970 4.940 V
R
L
=
100 kΩ to 2.5V 4.950 4.950 4.910 min
0.004 0.030 0.030 0.060 V
0.050 0.050 0.090 max
V
+
=
5V 4.940 4.850 4.850 4.750 V
R
L
=
5kΩto 2.5V 4.750 4.750 4.650 min
0.040 0.150 0.150 0.250 V
0.250 0.250 0.350 max
V
+
=
15V 14.970 14.920 14.920 14.880 V
R
L
=
100 kΩ to 7.5V 14.880 14.880 14.820 min
0.007 0.030 0.030 0.060 V
0.050 0.050 0.090 max
V
+
=
15V 14.840 14.680 14.680 14.580 V
R
L
=
5kΩto 7.5V 14.600 14.600 14.480 min
0.110 0.220 0.220 0.320 V
0.300 0.300 0.400 max
I
O
Output Current Sourcing, V
O
=
0V 22 16 16 13 mA
V
+
=
5V 12 14 11 min
Sinking, V
O
=
5V 21 16 16 13 mA
12 14 11 min
I
O
Output Current Sourcing, V
O
=
0V 40 19 28 23 mA
V
+
=
15V 19 25 20 min
Sinking, V
O
=
13V 39 19 28 23 mA
(Note 9) 19 24 19 min
I
S
Supply Current V
+
=
5V, V
O
=
1.5V 55 60 60 70 µA
70 70 85 max
V
+
=
15V, V
O
=
1.5V 58 75 75 90 µA
85 85 105 max
AC Electrical Characteristics
The following specifications apply for V
+
=
5V, V
−
=
0V, V
CM
=
1.5V, V
O
=
2.5V, and R
L
=
1M unless otherwise noted. Bold-
face limits apply at the temperature extremes; all other limits T
J
=
25˚C.
LPC661AM LPC661AI LPC661I Units
(Limit)
Symbol Parameter Conditions Typ Limit Limit Limit
(Note 4) (Note 4) (Note 4)
SR Slew Rate (Note 6) 0.11 0.07 0.07 0.05 V/µs
0.04 0.05 0.03 min
GBW Gain-Bandwidth Product 350 kHz
φm Phase Margin 50 Deg
G
M
Gain Margin 17 dB
e
n
Input Referred Voltage Noise F=1 kHz 42 nV/√Hz
i
n
Input Referred Current Noise F=1 kHz 0.0002 pA/√Hz
T.H.D. Total Harmonic Distortion F=1 kHz, A
V
=
−10 0.01
R
L
=
100 kΩ,V
O
=
8V
PP
%
V
+
=
15V
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AC Electrical Characteristics (Continued)
Note 1: AbsoluteMaximumRatings 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: Appliesto both single supply and 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
±
30 mA over long term may adversely affect reliability.
Note 3: The maximum power dissipation is a function of T
J(max)
, θJAand TA. The maximum allowable power dissipation at any ambient temperature is P
D
=
(T
J(max)–TA
)/θJA.
Note 4: Limits are guaranteed by testing or correlation.
Note 5: V+=15V, V
CM
=
7.5V and R
L
connected to 7.5V. For sourcing tests, 7.5V ≤ VO≤ 11.5V. For sinking tests, 2.5V ≤ VO≤ 7.5V.
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
JA
with P
D
=
(T
J–TA
)/θJA.
Note 8: All numbers apply for packages soldered directly into a PC board.
Note 9: Do not connect output to V
+
when V+is greater than 13V or reliability may be adversely affected.
Typical Performance Characteristics V
S
=
±
7.5V, T
A
=
25˚C unless otherwise specified
Supply Current
vs Supply Voltage
DS011227-26
Input Bias Current
vs Temperature
DS011227-27
Common-Mode Voltage Range
vs Temperature
DS011227-28
Output Characteristics
Current Sinking
DS011227-29
Output Characteristics
Current Sourcing
DS011227-30
Input Voltage Noise
vs Frequency
DS011227-31
www.national.com 4
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