FEATURES
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LTC6081/LTC6082
Precision Dual/Quad
CMOS Rail-to-Rail Input/
Output Amplifiers
DESCRIPTION
The LTC
®
6081/LTC6082 are dual/quad low offset, low drift,
low noise CMOS operational amplifiers with rail-to-rail
input/output swing.
The 70μV maximum offset, 1pA input bias current, 120dB
open loop gain and 1.3μV
P-P
0.1Hz to 10Hz noise make
it perfect for precision signal conditioning. The LTC6081/
LTC6082 features 100dB CMRR and 98dB PSRR.
Each amplifier consumes only 330μA of current on a 3V
supply. The 10-lead DFN has an independent shutdown
function that reduces each amplifier’s supply current
to 1μA.
LTC6081/LTC6082 is specified for power supply voltages
of 3V and 5V from –40°C to 125°C. The dual LTC6081 is
available in 8-lead MSOP and 10-lead DFN10 packages.
The quad LTC6082 is available in 16-lead SSOP and DFN
packages.
, LTC, LT and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Maximum Offset Voltage: 70μV (25°C)
Maximum Offset Drift: 0.8μV/°C
Maximum Input Bias: 1pA (25°C) 40pA (T
A
≤ 85°C)
Open Loop Voltage Gain: 120dB Typ
Gain Bandwidth Product: 3.6MHz
CMRR: 100dB Min
PSRR: 98dB Min
0.1Hz to 10Hz Noise: 1.3μV
P-P
Supply Current: 330μA
Rail-to-Rail Inputs and Outputs
Unity Gain Stable
2.7V to 5.5V Operation Voltage
Dual LTC6081 in 8-Lead MSOP and 10-Lead DFN10
Packages; Quad LTC6082 in 16-Lead SSOP and DFN
Packages
APPLICATIONS
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Photodiode Amplifier
Strain Gauge
High Impedance Sensor Amplifier
Microvolt Accuracy Threshold Detection
Instrumentation Amplifiers
Thermocouple Amplifiers
TYPICAL APPLICATION
Shock Sensor Amplifier (Accelerometer)
30
0.1μF
8.2pF
2M
MURATA
PKGS-00LD
770pF
0° SENSOR
1G
3.9pF
2M
3.9pF
NUMBER OF AMPLIFIERS (OUT OF 100)
V
+
25
20
15
10
5
0
–0.20
V
OS
Drift Histogram
LTC6081MS8
T
A
= –40°C TO 125°C
V
S
= 3V
V
CM
= 0.5V
+
1/2
LTC6081
–
1M
0.1μF
V
–
1M
10k
47pF
V
OUT
= 109mV/g
BW ~ 2.2kHz
60812 TA01
–0.10
0
0.10
V
OSDRIFT
(μV/°C)
0.20
0.30
60812 TA01b
60812f
1
LTC6081/LTC6082
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (V
+
to V
–
) ...................................6V
Input Voltage...................................................... V
–
to V
+
Output Short Circuit Duration (Note 2) ............ Indefinite
Operating Temperature Range (Note 3)
LTC6081C, LTC6082C .......................... –40°C to 85°C
LTC6081I, LTC6082I ............................ –40°C to 85°C
LTC6081H, LTC6082H........................ –40°C to 125°C
(H Temperature Range Not Available in DFN Package)
Specified Temperature Range (Note 4)
LTC6081C, LTC6082C .............................. 0°C to 70°C
LTC6081I, LTC6082I ............................ –40°C to 85°C
LTC6081H, LTC6082H........................ –40°C to 125°C
Junction Temperature
DFN Packages ................................................... 125°C
All Other Packages ............................................ 150°C
Storage Temperature Range
DFN Packages .................................... –65°C to 125°C
All Other Packages ............................. –65°C to 150°C
Lead Temperature (Soldering, 10 Sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
OUTA
–INA
+INA
V
–
SHDN_A
1
2
3
4
5
A
B
10 V
+
9 OUTB
8 –INB
7 +INB
6 SHDN_B
OUTA
–INA
+INA
V
–
1
2
3
4
TOP VIEW
A
B
8
7
6
5
V
+
OUTB
–INB
+INB
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
UNDERSIDE METAL CONNECTED TO V
–
TOP VIEW
OUTA
–INA
+INA
V
+
+INB
–INB
OUTB
NC
1
2
3
4
5
6
7
8
B
C
A
D
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 200°C/W
TOP VIEW
16 OUTD
15 –IND
14 +IND
13 V
–
12 +INC
11 –INC
10 OUTC
9
NC
OUTA
–INA
+INA
V
+
+INB
–INB
OUTB
NC
1
2
3
4
5
6
7
8
B
C
A
D
16 OUTD
15 –IND
14 +IND
13 V
–
12 +INC
11 –INC
10 OUTC
9
NC
DHC PACKAGE
16-LEAD (5mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
UNDERSIDE METAL CONNECTED TO V
–
GN PACKAGE
16-LEAD PLASTIC SSOP
T
JMAX
= 150°C,
θ
JA
= 110°C/W
60812f
2
LTC6081/LTC6082
ORDER INFORMATION
LTC6081 C
DD
#
TR
PBF
LEAD FREE DESIGNATOR
PBF = Lead Free
Blank = Lead Tin Lead Finish
TAPE AND REEL
TR = Tape and Reel
Blank = Bulk
NUMBER SIGN
Required before Tape and Reel and Lead Free Orders
PACKAGE TYPE
DD = 10-Lead (3mm
×
3mm) Plastic DFN
DHC = 16-Lead (5mm
×
3mm) Plastic DFN
GN = 16-Lead Plastic SSOP
MS8 = 8-Lead Plastic MSOP
TEMPERATURE GRADE
C = Commercial Temperature Range (0°C to 70°C)
I = Industrial Temperature Range (–40°C to 85°C)
H = High Temperature Range (–40°C to 125°C)
(H grade not available for DD or DHC package)
PRODUCT PART NUMBER
LTC6081 (Precision Dual Amplifier)
LTC6082 (Precision Quad Amplifier)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
60812f
3
LTC6081/LTC6082
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
Offset Voltage
CONDITIONS
LTC6081MS8, LTC6082GN
LTC6081MS8, LTC6082GN
LTC6081DD, LTC6082DHC
LTC6081DD, LTC6082DHC
V
CM
= 0.5V, 2.5V
V
CM
= 0.5V, 2.5V
V
CM
= 0.5V, 2.5V
V
CM
= 0.5V, 2.5V
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Test conditions are V
+
= 3V, V
–
= 0V, V
CM
= 0.5V unless otherwise noted.
C, I SUFFIXES
MIN
–70
–90
–70
–90
±0.2
0.2
●
H SUFFIX
MIN
–70
–90
TYP
MAX
70
90
UNITS
μV
μV
μV
μV
μV/°C
pA
pA
pA
pA
nV/√Hz
μV
P-P
fA/√Hz
V
+
3
7
95
86
93
86
98
96
–35
–350
105
100
105
100
110
1
V
pF
pF
dB
dB
dB
dB
dB
dB
mV
mV
mV
40
360
110
15
15
120
mV
mV
mV
dB
mA
mA
1
2.5
1.5
3.6
70
6
V/μs
MHz
MHz
Deg
μs
400
460
μA
μA
μA
μA
2.7
–120
5.5
V
dB
TYP
MAX
70
90
70
90
±0.8
1
40
15
ΔV
OS
⁄ΔT Input Offset Voltage Drift
(Note 5)
I
B
I
OS
e
n
I
n
Input Bias Current
(Note 6)
Input Offset Current
±0.2
0.2
0.1
±0.8
1
500
100
0.1
●
Input Referred Noise
Input Noise Current Density
(Note 7)
Input Common Mode Range
Noise Density at f = 1kHz
Integrated Noise From 0.1Hz to 10Hz
13
1.3
0.5
●
13
1.3
0.5
V
+
V
–
V
–
3
7
C
DIFF
C
CM
CMRR
Differential Input Capacitance
Common Mode Input
Capacitance
Common Mode Rejection
Ratio
V
CM
= 0V to 1.5V
V
CM
= 0V to 1.5V
V
CM
= 0V to 3V
V
CM
= 0V to 3V
●
●
●
●
●
●
●
●
●
●
95
88
93
88
98
96
–32
–320
105
100
105
100
110
1
PSRR
V
OUT
Power Supply Rejection Ratio V
S
= 2.7V to 5.5V
Output Voltage, High, Either
Output Pin
Output Voltage, Low, Either
Output Pin (Referred to V
–
)
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 5mA
No Load
I
SINK
= 0.5mA
I
SINK
= 5mA
R
LOAD
= 10k, 0.5V < V
OUT
< 2.5V
Source
Sink
A
V
= 1
R
L
= 100k
R
L
= 10k
A
V
= 1, 1V Step
No Load
1
33
300
110
17
17
1
●
1
A
VOL
I
SC
SR
GBW
Φ
0
t
S
I
S
Large-Signal Voltage Gain
Output Short-Circuit Current
Slew Rate
Gain-Bandwidth Product
(f
TEST
= 50kHz)
Phase Margin
Settling Time 0.1%
Supply Current
(Per Amplifier)
Shutdown Current
(Per Amplifier)
120
2.5
1.8
3.6
70
6
330
400
435
2
330
●
Shutdown, V
⎯
S
⎯
H
⎯
D
⎯
N
≤ 0.8V
Guaranteed by the PSRR Test
f
s
= 10kHz, R
L
= 10k
0.5
●
●
V
S
Supply Voltage Range
Channel Separation
2.7
–120
5.5
60812f
4
LTC6081/LTC6082
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Shutdown Logic
THD
t
ON
t
OFF
Total Harmonic Distortion
Turn-On Time
Turn-Off Time
⎯
S
⎯
H
⎯
D
⎯
N Pin Current
CONDITIONS
⎯
SHDN High
⎯ ⎯ ⎯
⎯
S
⎯
H
⎯
D
⎯
N Low
f = 10kHz, V
+
= 3V, V
OUT
= 1V
P-P
, R
L
= 10k
V
⎯
S
⎯
H
⎯
D
⎯
N
= 0.8V to 2V
V
⎯
S
⎯
H
⎯
D
⎯
N
= 2V to 0.8V
V
⎯
S
⎯
H
⎯
D
⎯
N
= 0V
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Test conditions are V
+
= 3V, V
–
= 0V, V
CM
= 0.5V unless otherwise noted.
C, I SUFFIXES
MIN
●
●
H SUFFIX
MIN
2
TYP
MAX
0.8
–90
10
2
2
UNITS
V
V
dB
μs
μs
μA
TYP
MAX
0.8
2
–90
10
2
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. Test
conditions are V
+
= 5V, V
–
= 0V, V
CM
= 0.5V unless otherwise noted.
C, I SUFFIXES
SYMBOL PARAMETER
V
OS
Offset Voltage
CONDITIONS
LTC6081MS8, LTC6082GN
LTC6081MS8, LTC6082GN
LTC6081DD, LTC6082DHC
LTC6081DD, LTC6082DHC
V
CM
= 0.5V
V
CM
= 0.5V
V
CM
= 0.5V
V
CM
= 0.5V
●
●
●
H SUFFIX
MIN
–70
–90
TYP
MAX
70
90
UNITS
μV
μV
μV
μV
μV/°C
pA
pA
pA
pA
nV/√Hz
μV
P-P
fA/√Hz
V
+
3
7
100
94
86
98
96
–25
–220
110
110
95
110
1
V
pF
pF
dB
dB
dB
dB
dB
mV
mV
mV
32
240
110
120
mV
mV
mV
dB
MIN
–70
–90
–70
–90
TYP
MAX
70
90
70
90
ΔV
OS
⁄ΔT Input Offset Voltage Drift
(Note 8)
I
B
I
OS
e
n
I
n
Input Bias Current
±0.2
0.2
±0.8
±0.2
0.2
±0.8
●
40
0.1
0.1
15
13
1.3
0.5
13
1.3
0.5
V
+
3
7
V
–
500
100
Input Offset Current
●
Input Referred Noise
Input Noise Current Density
(Note 7)
Input Common Mode Range
f = 1kHz
0.1Hz to 10Hz
●
V
–
C
DIFF
C
CM
CMRR
Differential Input Capacitance
Common Mode Input
Capacitance
Common Mode Rejection
Ratio
V
CM
= 0V to 3.5V
V
CM
= 0V to 3.5V
V
CM
= 0V to 5V
●
●
●
●
●
●
●
●
100
95
86
98
96
–24
–200
110
110
95
110
1
PSRR
V
OUT
Power Supply Rejection Ratio V
S
= 2.7V to 5.5V
Output Voltage, High, Either
Output Pin (Referred to V
+
)
Output Voltage, Low, Either
Output Pin (Referred to V
–
)
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 5mA
No Load
I
SINK
= 0.5mA
I
SINK
= 5mA
R
LOAD
= 10k, 0.5V < V
OUT
< 4.5V
1
27
210
110
120
1
A
VOL
Large-Signal Voltage Gain
60812f
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