LTC6078/LTC6079
1
60789f
Micropower Precision,
Dual/Quad CMOS
Rail-to-Rail Input/Output Amplifi ers
The LTC
6078/LTC6079 are dual/quad, low offset, low
noise operational amplifi ers with low power consumption
and rail-to-rail input/output swing.
Input offset voltage is trimmed to less than 25V and the
CMOS inputs draw less than 50pA of bias current. The low
offset drift, excellent CMRR, and high voltage gain make
it a good choice for precision signal conditioning.
Each amplifi er draws only 54A current on a 3V supply. The
micropower, rail-to-rail operation of the LTC6078/LTC6079
is well suited for portable instruments and single supply
applications.
The LTC6078/LTC6079 are specifi ed on power supply
voltages of 3V and 5V from 40 to 125C. The dual am-
plifi er LTC6078 is available in 8-lead MSOP and 10-lead
DFN packages. The quad amplifi er LTC6079 is available
in 16-lead SSOP and DFN packages.
Photodiode Amplifi er
High Impedance Sensor Amplifi er
Microvolt Accuracy Threshold Detection
Instrumentation Amplifi ers
Battery Powered Applications
Maximum Offset Voltage of 25V (25C)
Maximum Offset Drift of 0.7V/C
Maximum Input Bias:
1pA
(25C)
50pA
(85C)
Micropower: 54A per Amp
95dB CMRR (Min)
100dB PSRR (Min)
Input Noise Voltage: 16nV/Hz
Rail-to-Rail Inputs and Outputs
2.7V to 5.5V Operation Voltage
LTC6078 Available in 8-Lead MSOP and 10-Lead DFN
Packages; LTC6079 Available in 16-Lead SSOP and
DFN Packages
Thermocouple Signal Conditioner
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Patent Pending.
1k
5.6pF
0.1
F
OUT = 10mV/
C
0
C TO 500C 0.5C
5V
5V
+
60789 TA01a
2.49M
SMT
1/4W
150k
NORMALLY
FLOATING
OMEGA
5TC-TT-K-30-36
THERMOCOUPLE
AMPLIFIER PROTECTED TO
190V, ACCIDENTAL CONTACT
40.6
V/C
SMT
1/4W
150k
10k
100pF
K
1/2
LTC6078
LT1025
V
OS
Distribution
V
OS
(V)
NUMBER OF AMPS OUT OF 200
14
12
10
6
8
4
2
0
60789 TA01b
11
7
9 7 5
1
5
9
3 1
3
LTC6078MS8
V
S
= 3V
V
CM
= 0.5V
T
A
= 25C
LTC6078/LTC6079
2
60789f
Total Supply Voltage (V
+
to V
) ...................................6V
Input Voltage ...................................................... V
to V
+
Output Short Circuit Duration (Note 2) ............ Indefi nite
Operating Temperature Range (Note 3)
LTC6078C, LTC6079C .......................... 40C to 85C
LTC6078I, LTC6079I ............................ 40C to 85C
LTC6078H, LTC6079H ........................ 40C to 125C
(Not Available in DFN Package)
(Note 1)
Specifi ed Temperature Range (Note 4)
LTC6078C, LTC6079C .............................. 0C to 70C
LTC6078I, LTC6079I ............................ 40C to 85C
LTC6078H, LTC6079H ........................ 40C to 125C
Junction Temperature
DFN
Packages
................................................... 125C
All Other Packages ............................................ 150C
Storage Temperature Range
DFN Packages .................................... 65C to 125C
All Other Packages ............................. 65C to 150C
Lead Temperature (Soldering, 10 Sec) .................. 300C
ABSOLUTE AXI U
RATI GS
W
W
W
U
PACKAGE/ORDER I FOR ATIO
U
U
W
TOP VIEW
DD PACKAGE
10-LEAD (3mm
3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
V
+
OUTB
INB
+INB
SHDN_B
OUTA
INA
+INA
V
SHDN_A
B
A
T
JMAX
= 125C,
JA
= 43C/W
UNDERSIDE METAL CONNECTED TO V
1
2
3
4
OUTA
INA
+INA
V
8
7
6
5
V
+
OUTB
INB
+INB
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
B
A
T
JMAX
= 150C,
JA
= 200C/W
ORDER PART
NUMBER
DD PART
MARKING*
LTC6078CDD
LTC6078IDD
LBBB
LBBB
ORDER PART
NUMBER
MS8 PART
MARKING*
LTC6078ACMS8
LTC6078CMS8
LTC6078AIMS8
LTC6078IMS8
LTC6078AHMS8
LTC6078HMS8
LTAJZ
LTAJZ
LTAJZ
LTAJZ
LTAJZ
LTAJZ
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OUTD
IND
+IND
V
+INC
INC
OUTC
NC
OUTA
INA
+INA
V
+
+INB
INB
OUTB
NC
TOP VIEW
DHC PACKAGE
16-LEAD (5mm
3mm) PLASTIC DFN
D
A
C
B
T
JMAX
= 125C,
JA
= 43C/W
UNDERSIDE METAL CONNECTED TO V
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
OUTA
INA
+INA
V
+
+INB
INB
OUTB
NC
OUTD
IND
+IND
V
+INC
INC
OUTC
NC
D
A
C
B
T
JMAX
= 150C,
JA
= 110C/W
ORDER PART
NUMBER
DHC PART
MARKING*
LTC6079CDHC
LTC6079IDHC
6079
6079
ORDER PART
NUMBER
GN PART
MARKING
LTC6079CGN
LTC6079IGN
LTC6079HGN
6079
6079I
6079H
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
*The temperature grades and parametric grades are identifi ed by a label on the shipping container.
LTC6078/LTC6079
3
60789f
The
denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25C. Test conditions are V
+
= 3V, V
= 0V, V
CM
= 0.5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
C, I SUFFIXES
H SUFFIX
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
V
OS
Offset Voltage (Note 5)
LTC6078MS8, LTC6078AMS8, LTC6079GN
V
CM
= 0.5V, 2.5V
LTC6078DD, LTC6079DHC
V
CM
= 0.5V, 2.5V
LTC6078AMS8 V
CM
= 0.5V
LTC6078MS8 V
CM
= 0.5V
LTC6079GN V
CM
= 0.5V
LTC6078DD V
CM
= 0.5V
LTC6079DHC V
CM
= 0.5V
7
7
20
25
30
30
35
25
30
70
97
115
120
150
7
25
30
35
25
95
135
165
V
V
V
V
V
V
V
V
OS
/T Input Offset Voltage Drift
(Note 5)
LTC6078AMS8
LTC6078MS8
LTC6078DD, LTC6079GN
LTC6079DHC
0.2
0.3
0.3
0.7
1.1
1.4
1.8
0.2
0.3
0.7
1.1
1.4
V/C
V/C
V/C
V/C
I
B
Input Bias Current
(Note 6)
0.2
10
1
50
0.2
150
1
350
pA
pA
I
OS
Input Offset Current
0.1
0.5
25
0.1
10
100
pA
pA
e
n
Input Noise Voltage
0.1Hz to 10Hz
1
1
V
P-P
Input Noise Voltage Density
f = 1kHz
f = 10kHz
18
16
18
16
nV/Hz
nV/Hz
Input Common Mode Range
V
V
+
V
V
+
V
C
DIFF
Differential Input Capacitance
10
10
pF
C
CM
Common Mode Input
Capacitance
18
18
pF
CMRR
Common Mode Rejection
Ratio
All Packages
V
CM
= 0V to 3V
LTC6078AMS8 V
CM
= 0V to 3V
LTC6078AMS8 V
CM
= 0V to 1.7V
LTC6078MS8 V
CM
= 0V to 3V
LTC6078MS8 V
CM
= 0V to 1.7V
LTC6079GN V
CM
= 0V to 3V
LTC6079GN V
CM
= 0V to 1.7V
LTC6078DD, LTC6079DHC
V
CM
= 0V to 3V
LTC6078DD, LTC6079DHC
V
CM
= 0V to 1.7V
95
87
91
85
89
84
88
83
87
110
105
103
102
102
102
102
100
102
95
87
91
85
89
84
88
110
103
103
100
102
100
102
dB
dB
dB
dB
dB
dB
dB
dB
dB
PSRR
Power Supply Rejection Ratio V
S
= 2.7V to 5.5V
100
97
120
100
97
120
dB
dB
V
OUT
Output Voltage, High
(Referred to V
+
)
No Load
I
SOURCE
= 0.2mA
I
SOURCE
= 2mA
35
350
1
15
150
40
400
1
15
150
mV
mV
mV
Output Voltage, Low
(Referred to V
)
No Load
I
SINK
= 0.2mA
I
SINK
= 2mA
1
10
100
30
300
1
10
100
35
350
mV
mV
mV
A
VOL
Large-Signal Voltage Gain
R
LOAD
= 10k, 0.5 V
OUT
2.5
115
130
110
125
dB
I
SC
Output Short-Circuit Current
Source
Sink
5
7
10
14
4
6
10
14
mA
mA
SR
Slew Rate
A
V
= 1
0.05
0.05
V/s
GBW
Gain-Bandwidth Product
(f
TEST
= 10kHz)
R
L
= 100k
420
360
750
420
320
750
kHz
kHz
0
Phase Margin
R
L
= 10k, C
L
= 200pF
66
66
Deg
t
S
Settling Time 0.1%
A
V
= 1, 1V Step
24
24
s
ELECTRICAL CHARACTERISTICS
LTC6078/LTC6079
4
60789f
ELECTRICAL CHARACTERISTICS
The
denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25C. Test conditions are V
+
= 3V, V
= 0V, V
CM
= 0.5 unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
C, I SUFFIXES
H SUFFIX
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
I
S
Supply Current
(per Amplifi er)
No Load
54
72
78
54
72
80
A
A
Shutdown Current
(per Amplifi er)
Shutdown, V
SHDN
0.8V, LTC6078DD
0.3
1
A
V
S
Supply Voltage Range
Guaranteed by the PSRR Test
2.7
5.5
2.7
5.5
V
Channel Separation
f
s
= 10kHz, R
L
= 10k
110
110
dB
Shutdown Logic
SHDN High, LTC6078DD
SHDN Low
2
0.8
2
0.8
V
V
t
ON
Turn on Time
V
SHDN
= 0.8V to 2V, LTC6078DD
50
50
s
t
OFF
Turn off Time
V
SHDN
= 2V to 0.8V, LTC6078DD
2
2
s
Leakage of SHDN Pin
V
SHDN
= 0V, LTC6078DD
0.6
A
The
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T
A
= 25C. Test
conditions are V
+
= 5V, V
= 0V, V
CM
= 0.5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
C, I SUFFIXES
H SUFFIX
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
V
OS
Offset Voltage
LTC6078MS8, LTC6078AMS8, LTC6079GN
V
CM
= 0.5V
LTC6078DD, LTC6079DHC
V
CM
= 0.5V
LTC6078AMS8 V
CM
= 0.5V
LTC6078MS8 V
CM
= 0.5V
LTC6079GN V
CM
= 0.5V
LTC6078DD V
CM
= 0.5V
LTC6079DHC V
CM
= 0.5V
10
10
20
25
30
30
35
30
35
75
102
120
125
155
10
25
30
35
30
100
140
170
V
V
V
V
V
V
V
V
OS
/T Input Offset Voltage Drift
(Note 7)
LTC6078AMS8
LTC6078MS8
LTC6078DD, LTC6079GN
LTC6079DHC
0.2
0.3
0.3
0.7
1.1
1.4
1.8
0.2
0.3
0.7
1.1
1.4
V/C
V/C
V/C
V/C
I
B
Input Bias Current
0.2
10
1
50
0.2
150
1
350
pA
pA
I
OS
Input Offset Current
0.1
0.5
25
0.1
10
100
pA
pA
e
n
Input Noise Voltage
0.1Hz to 10Hz
1
1
V
P-P
Input Noise Voltage Density
f = 1kHz
f = 10kHz
18
16
18
16
nV/Hz
nV/Hz
Input Common Mode Range
V
V
+
V
V
+
V
C
DIFF
Differential Input Capacitance
10
10
pF
C
CM
Common Mode Input
Capacitance
18
18
pF
CMRR
Common Mode Rejection
Ratio
All Packages
V
CM
= 0V to 5V
LTC6078AMS8 V
CM
= 0V to 5V
LTC6078AMS8 V
CM
= 0V to 3.7V
LTC6078MS8 V
CM
= 0V to 5V
LTC6078MS8 V
CM
= 0V to 3.7V
LTC6079GN V
CM
= 0V to 5V
LTC6079GN V
CM
= 0V to 3.7V
LTC6078DD, LTC6079DHC
V
CM
= 0V to 5V
LTC6078DD, LTC6079DHC
V
CM
= 0V to 3.7V
91
90
94
88
90
86
90
86
90
105
105
105
100
105
100
105
100
105
91
90
94
88
90
86
90
105
105
105
100
105
100
105
dB
dB
dB
dB
dB
dB
dB
dB
dB
LTC6078/LTC6079
5
60789f
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: A heat sink may be required to keep the junction temperature
below the absolute maximum. This depends on the power supply voltage
and how many amplifi ers are shorted.
Note 3: The LTC6078C/LTC6079C and LTC6078I/LTC6079I are guaranteed
functional over the operating temperature range of 40C to 85C. The
LTC6078H/LTC6079H are guaranteed functional over the operating
temperature range of 40C to 125C.
SYMBOL PARAMETER
CONDITIONS
C, I SUFFIXES
H SUFFIX
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
PSRR
Power Supply Rejection Ratio V
S
= 2.7V to 5.5V
100
97
120
97
120
dB
dB
V
OUT
Output Voltage, High
(Referred to V
+
)
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 5mA
50
500
2
20
200
55
550
2
20
200
mV
mV
mV
Output Voltage, Low
(Referred to V
)
No Load
I
SINK
= 0.5mA
I
SINK
= 5mA
1
15
150
40
400
1
15
150
45
450
mV
mV
mV
A
VOL
Large-Signal Voltage Gain
R
LOAD
= 10k, 0.5 V
OUT
4.5
115
130
110
125
dB
I
SC
Output Short-Circuit Current
Source
Sink
14
14
25
25
12
12
25
25
mA
mA
SR
Slew Rate
A
V
= 1
0.05
0.05
V/s
GBW
Gain-Bandwidth Product
(f
TEST
= 10kHz)
R
L
= 100k
420
360
750
420
320
750
kHz
0
Phase Margin
R
L
= 10k, C
L
= 200pF
66
66
Deg
t
S
Settling Time 0.1%
A
V
= 1, 1V Step
24
24
s
I
S
Supply Current
(per Amplifi er)
No Load
55
74
82
55
74
84
A
A
Shutdown Current
(per Amplifi er)
Shutdown, V
SHDN
1.2V, LTC6078DD
1.5
5
1.5
5
A
V
S
Supply Voltage Range
Guaranteed by the PSRR Test
2.7
5.5
2.7
5.5
V
Channel Separation
f
s
= 10kHz, R
L
= 10k
110
110
dB
Shutdown Logic
SHDN High, LTC6078DD
SHDN Low
3.5
1.2
3.5
1.2
V
V
t
ON
Turn on Time
V
SHDN
= 1.2V to 3.5V, LTC6078DD
50
50
s
t
OFF
Turn off Time
V
SHDN
= 1.2V to 3.5V, LTC6078DD
2
2
s
Leakage of SHDN Pin
V
SHDN
= 0V, LTC6078DD
0.6
A
Note 4: The LTC6078C/LTC6079C are guaranteed to meet specifi ed
performance from 0C to 70C. The LTC6078C/LTC6079C are designed,
characterized and expected to meet specifi ed performance from 40C
to 85C but are not tested or QA sampled at these temperatures. The
LTC6078I/LTC6079I are guaranteed to meet specifi ed performance from
40C to 85C. The LTC6078H/LTC6079H are guaranteed to meet specifi ed
performance from 40C to 125C.
Note 5: V
OS
and V
OS
drift are 100% tested at 25C and 125C.
Note 6: I
B
guaranteed by the V
S
= 5V test.
Note 7: V
OS
drift is guaranteed by the V
S
= 3V test.
ELECTRICAL CHARACTERISTICS
The
denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25C. Test conditions are V
+
= 5V, V
= 0V, V
CM
= 0.5 unless otherwise noted.
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