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LMC6442IMX
Datasheet
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NSC LMC6442IMX, LMC6442IMMX, LMC6442AIN, LMC6442AIMX, LMC6442AIMMX Datasheet

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LMC6442 Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier
General Description
The LMC6442 is ideal for battery powered systems, where very low supply current (less than one microamp per ampli­fier) and Rail-to-Rail output swing is required. It is character­ized for 2.2V to 10V operation, and at 2.2V supply, the LMC6442 is ideal for single (Li-Ion) or two cell (NiCad or al­kaline) battery systems.
The LMC6442 is designed for battery powered systems that require long service life through low supply current, such as smoke and gas detectors, and pager or personal communi­cations systems.
Operation from single supply is enhanced by the wide com­mon mode input voltage range which includes the ground (or negative supply) for ground sensing applications. Very low (5fA, typical) input bias current and near constant supply cur­rent over supply voltage enhance the LMC6442’s perfor­mance near the end-of-life battery voltage.
Designed for closed loop gains of greater than plus two (or minus one), the amplifier has typically 9.5 KHz GBWP (Gain Bandwidth Product). Unity gain can be used with a simple compensation circuit, which also allows capacitive loads of up to 300 pF to be driven, as described in the Application Notes section.
For compact assembly the LMC6442 is available in the MSOP 8 pin package, about one half the size required by the SOIC 8 pin package. 8 pin DIP and 8 pin SOIC are also available.
Key Specifications Features
(Typical, V
S
=
2.2V)
n Output Swing to within 30 mV of supply rail n High voltage gain 103 dB n Gain Bandwidth Product 9.5 KHz n Guaranteed for: 2.2V, 5V, 10V n Low Supply Current 0.95 µA/Amplifier n Input Voltage Range −0.3V to V
+
-0.9V
n Power consumption 2.1 µW/Amplifier n Stable for A
V
≥+2 or AV≤ −1
Applications
n Portable instruments n Smoke/gas/CO/fire detectors n Pagers/cell phones n Instrumentation n Thermostats n Occupancy sensors n Cameras n Active badges
Connection Diagram
Ordering Information
Package
Temperature Range
NSC
Drawing
Supplied
AS
Package Marking
Industrial −40˚C to +85˚C Military −55˚C to +125˚C
8-pin SO-8 LMC6442AIM, LMC6442IM - M08A Rails
LMC6442AIM LMC6442IM
LMC6442AIMX, LMC6442IMX - M08A
2.5K Tape and Reel
DS100064-40
Top View
September 1997
LMC6442 Dual Micropower Rail-to-Rail Output Single Supply Operational Amplifier
© 1999 National Semiconductor Corporation DS100064 www.national.com
Ordering Information (Continued)
Package
Temperature Range
NSC
Drawing
Supplied
AS
Package Marking
Industrial −40˚C to +85˚C Military −55˚C to +125˚C
MSOP LMC6442AIMM, LMC6442IMM - MUA08A Rails
A08A
LMC6442AIMMX, LMC6442IMMX
- MUA08A
3K Tape and Reel
8-pin DIP
LMC6442AIN, LMC6442IN - N08E
Rails LMC6442AIN,
LMC6442IN
8-pin CDIP
-
5962-9761301QPA J08A Rails LMC6442AMJ-QML
5962-976130IQPA
10-pin SO
-
5962-9761301QXA WG10A Trays LMC6442AMWG-Q
9761301QXA
www.national.com 2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
ESD Tolerance (Note 2) 2 kV Differential Input Voltage
±
Supply Voltages
Voltage at Input/Output Pin (V
+
) + 0.3V, (V−) − 0.3V
Supply Voltage (V
+−V−
): 16V
Current at Input Pin (Note 10)
±
5mA
Current at Output Pin(Notes 3, 7)
±
30 mA Lead Temp. (soldering 10 sec) 260˚C Storage Temp. Range: −65˚C to +150˚C Junction Temp. (Note 4) 150˚C
Operating Ratings(Note 1)
Supply Voltage 1.8V ≤ V
S
≤ 11V
Junction Temperature −40˚C
<
T
J
<
+85˚C Range: LMC6442AI, LMC6442I Thermal Resistance (θ
JA
)
M Package, 8-pin Surface Mount
193˚C/W
MSOP Package 235˚C/W N Package, 8-pin Molded
DIP
115˚C/W
2.2V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
=
25˚C, V
+
=
2.2V, V
−
=
0V, V
CM
=
V
O
=
V
+
/2, and R
L
=
1MΩto V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions
Typ
(Note 5)
LMC6442AI
Limit
(Note 6)
LMC6442I
Limit
(Note 6)
Units
DC Electrical Characteristics
V
OS
Input Offset Voltage
−0.75
±
3
±
4
±
7
±
8
mV
max
TCV
OS
Temp. coefficient of input offset voltage
0.4 µV/˚C
I
B
Input Bias Current (Note 14)
0.005 44
pA
max
I
OS
Input Offset Current (Note 14)
0.0025 22
pA
max
CMRR Common Mode Rejection
Ratio
−0.1V ≤ V
CM
≤0.5V 92 67
67
67
67
dB min
C
IN
Common Mode Input Capacitance
4.7 pF
PSRR Power Supply Rejection Ratio V
S
=
2.5 V to 10V 95
75
75
75
75
dB
min
V
CM
Input Common-Mode Voltage Range
CMRR ≥ 50 dB
1.3
1.05
0.95
1.05
0.95
V
min
−0.3 −0.2
0
−0.2
0
V
max
A
V
Large Signal Voltage Gain Sourcing (Note 11) 100
dB
min
Sinking(Note 11) 94 V
O
=
0.22V to 2V 103 80 80
V
O
Output Swing V
ID
=
100 mV (Note 13)
2.18
2.15
2.15
2.15
2.15
V
min
V
ID
=
−100 mV (Note 13) 22 60
60
60
60
mV
max
I
SC
Output Short Circuit Current Sourcing, V
ID
=
100 mV
(Notes 12, 13)
50 18
17
18
17
µA
min
Sinking, V
ID
=
−100 mV
(Notes 12, 13)
50 20
19
20
19
I
S
Supply Current (2 amplifiers) R
L
=
open 1.90 2.4
3.0
2.6
3.2
µA
max
V
+
=
1.8V, R
L
=
open 2.10
AC Electrical Characteristics
SR Slew Rate (Note 8) 2.2 V/ms
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2.2V Electrical Characteristics (Continued)
Unless otherwise specified, all limits guaranteed for T
J
=
25˚C, V
+
=
2.2V, V
−
=
0V, V
CM
=
V
O
=
V
+
/2, and R
L
=
1MΩto V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions
Typ
(Note 5)
LMC6442AI
Limit
(Note 6)
LMC6442I
Limit
(Note 6)
Units
AC Electrical Characteristics
GBWP Gain-Bandwidth Product 9.5 KHz
φ
m
Phase Margin (Note 15) 63 Degree
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
=
25˚C, V
+
=
5V, V
−
=
0V, V
CM
=
V
O
=
V
+
/2, and R
L
=
1MΩto V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions
Typ
(Note 5)
LMC6442AI
Limit
(Note 6)
LMC6442I
Limit
(Note 6)
Units
DC Electrical Characteristics
V
OS
Input Offset Voltage
−0.75
±
3
±
4
±
7
±
8
mV
max
TCV
OS
Temp. coefficient of input offset voltage
0.4 µV/˚C
I
B
Input Bias Current (Note 14)
0.005 44
pA
max
I
OS
Input Offset Current (Note 14)
0.0025 22
pA
max
CMRR Common Mode Rejection
Ratio
−0.1V ≤ V
CM
≤3.5V 102 70
70
70
70
dB min
C
IN
Common Mode Input Capacitance
4.1 pF
PSRR Power Supply Rejection Ratio V
S
=
2.5 V to 10V 95
75
75
75
75
dB
min
V
CM
Input Common-Mode Voltage Range
CMRR ≥ 50 dB
4.1
3.85
3.75
3.85
3.75
V
min
−0.4 −0.2
0
−0.2
0
V
max
A
V
Large Signal Voltage Gain Sourcing (Note 11) 100
dB
min
Sinking (Note 11) 94 V
O
=
0.5V to 4.5V 103 80 80
V
O
Output Swing V
ID
=
100 mV
(Note 13)
4.99 4.95
4.95
4.95
4.95
V
min
V
ID
=
−100 mV
(Note 13)
20 50
50
50
50
mV
max
I
SC
Output Short Circuit Current Sourcing, V
ID
=
100 mV
(Notes 12, 13)
500 300
200
300
200
µA
min
Sinking, V
ID
=
−100 mV
(Notes 12, 13)
350 200
150
200
150
I
S
Supply Current (2 amplifiers) R
L
=
open 1.90 2.4
3.0
2.6
3.2
µA
max
AC Electrical Characteristics
SR Slew Rate (Note 8) 4.1 2.5 2.5 V/ms GBWP Gain-Bandwidth Product 10 KHz
φ
m
Phase Margin (Note 15) 64 Degree
THD Total Harmonic Distortion A
V
=
+2, f=100 Hz,
R
L
=
10MΩ,V
OUT
=
1 Vpp
0.08
%
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10V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
=
25˚C, V
+
=
10V, V
−
=
0V, V
CM
=
V
O
=
V
+
/2, and R
L
=
1MΩto V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions
Typ
(Note 5)
LMC6442AI
Limit
(Note 6)
LMC6442I
Limit
(Note 6)
Units
DC Electrical Characteristics
V
OS
Input Offset Voltage
−1.5
±
3
±
4
±
7
±
8
mV
max
TCV
OS
Temp. coefficient of input offset voltage
0.4 µV/˚C
I
B
Input Bias Current (Note 14)
0.005 44
pA
max
I
OS
Input Offset Current (Note 14)
0.0025 22
pA
max
CMRR Common Mode Rejection
Ratio
−0.1V ≤ V
CM
≤8.5V 105 70
70
70
70
dB min
C
IN
Common Mode Input Capacitance
3.5 pF
PSRR Power Supply Rejection Ratio V
S
=
2.5 V to 10V 95
75
75
75
75
dB
min
V
CM
Input Common-Mode Voltage Range
CMRR ≥ 50 dB
9.1
8.85
8.75
8.85
8.75
V
min
−0.4 −0.2
0
−0.2
0
V
max
A
V
Large Signal Voltage Gain Sourcing (Note 11) 120
dB
min
Sinking (Note 11) 100 V
O
=
0.5V to 9.5V 104 80 80
V
O
Output Swing V
ID
=
100 mV
(Note 13)
9.99 9.97
9.97
9.97
9.97
V
min
V
ID
=
−100 mV(Note 13) 22 50
50
50
50
mV
max
I
SC
Output Short Circuit Current Sourcing, V
ID
=
100 mV
(Notes 12, 13)
2100 1200
1000
1200
1000
µA
min
Sinking, V
ID
=
−100 mV
(Notes 12, 13)
900 600
500
600
500
I
S
Supply Current (2 amplifiers) R
L
=
open 1.90 2.4
3.0
2.6
3.2
µA
max
AC Electrical Characteristics
SR Slew Rate(Note 8) 4.1 2.5 2.5 V/ms GBWP Gain-Bandwidth Product 10.5 KHz
φ
m
Phase Margin (Note 15) 68 Degree
e
n
Input-Referred Voltage Noise R
L
=
open
f=10 Hz
170 nV/
√
Hz
i
n
Input-Referred Current Noise R
L
=
open
f=10 Hz
0.0002 pA/
√
Hz
Crosstalk Rejection (Note 9) 85 dB
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