LTC6078/LTC6079
Micropower Precision,
Dual/Quad CMOS
Rail-to-Rail Input/Output Amplifiers
FEATURES
■
■
■
DESCRIPTIO
■
■
■
■
■
■
■
Maximum Offset Voltage of 25µV (25°C)
Maximum Offset Drift of 0.7µV/°C
Maximum Input Bias:
1pA (25°C)
50pA (≤85°C)
Micropower: 54µA per Amp
95dB CMRR (Min)
100dB PSRR (Min)
Input Noise Voltage Density: 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
The LTC
®
6078/LTC6079 are dual/quad, low offset, low
noise operational amplifiers with low power consumption
and rail-to-rail input/output swing.
Input offset voltage is trimmed to less than 25µV 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 amplifier draws only 54µA 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 specified on power supply
voltages of 3V and 5V from –40 to 125°C. The dual am-
plifier LTC6078 is available in 8-lead MSOP and 10-lead
DFN packages. The quad amplifier LTC6079 is available
in 16-lead SSOP and DFN packages.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Patent Pending.
APPLICATIO S
■
■
■
■
■
Photodiode Amplifier
High Impedance Sensor Amplifier
Microvolt Accuracy Threshold Detection
Instrumentation Amplifiers
Battery Powered Applications
TYPICAL APPLICATIO
SMT
1/4W
150k
0.1µF
OMEGA
5TC-TT-K-30-36
THERMOCOUPLE
SMT
1/4W
150k
LT1025
5V
Thermocouple Signal Conditioner
14
5V
NUMBER OF AMPS OUT OF 200
NORMALLY
FLOATING
+
1/2
LTC6078
LTC6078MS8
V
S
= 3V
12 V
CM
= 0.5V
T
A
= 25°C
10
8
6
4
2
0
–11 –9 –7 –5 –3 –1 1
V
OS
(µV)
–
2.49M
1k
40.6µV/°C
100pF
10k
5.6pF
OUT = 10mV/°C
0°C TO 500°C
±0.5°C
K
60789 TA01a
AMPLIFIER PROTECTED TO
±190V,
ACCIDENTAL CONTACT
U
V
OS
Distribution
3
5
7
9
60789 TA01b
U
U
60789fa
1
LTC6078/LTC6079
ABSOLUTE
(Note 1)
AXI U RATI GS
Specified Temperature Range (Note 4)
LTC6078C, LTC6079C .............................. 0°C to 70°C
LTC6078I, LTC6079I ............................ –40°C to 85°C
LTC6078H, LTC6079H........................ –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
Total Supply Voltage (V
+
to V
–
) ...................................6V
Input Voltage...................................................... V
–
to V
+
Output Short Circuit Duration (Note 2) ............ Indefinite
Operating Temperature Range (Note 3)
LTC6078C, LTC6079C .......................... –40°C to 85°C
LTC6078I, LTC6079I ............................ –40°C to 85°C
LTC6078H, LTC6079H........................ –40°C to 125°C
(Not Available in DFN Package)
PACKAGE/ORDER I FOR ATIO
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
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
UNDERSIDE METAL CONNECTED TO V
–
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 200°C/W
TOP VIEW
OUTA
–INA
+INA
V
+
+INB
–INB
OUTB
NC
1
2
3
4
5
6
7
8
B
C
A
D
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
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
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 specified with wider operating temperature ranges.
*The temperature grades and parametric grades are identified by a label on the shipping container.
60789fa
2
U
U
W
W W
U
W
ORDER PART
NUMBER
LTC6078CDD
LTC6078IDD
8
7
6
5
V
+
OUTB
–INB
+INB
DD PART
MARKING*
LBBB
LBBB
MS8 PART
MARKING*
LTAJZ
LTAJZ
LTAJZ
LTAJZ
LTAJZ
LTAJZ
DHC PART
MARKING*
6079
6079
GN PART
MARKING
6079
6079I
6079H
ORDER PART
NUMBER
LTC6078ACMS8
LTC6078CMS8
LTC6078AIMS8
LTC6078IMS8
LTC6078AHMS8
LTC6078HMS8
ORDER PART
NUMBER
LTC6079CDHC
LTC6079IDHC
ORDER PART
NUMBER
LTC6079CGN
LTC6079IGN
LTC6079HGN
16 OUTD
15 –IND
14 +IND
13 V
–
12 +INC
11 –INC
10 OUTC
9
NC
LTC6078/LTC6079
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
Offset Voltage (Note 5)
CONDITIONS
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
LTC6078AMS8
LTC6078MS8
LTC6078DD, LTC6079GN
LTC6079DHC
V
CM
= V
+
/2
V
CM
= V
+
/2
V
CM
= V
+
/2
V
CM
= V
+
/2
0.1Hz to 10Hz
f = 1kHz
f = 10kHz
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
TYP
±7
±7
±20
±25
±30
±30
±35
±0.2
±0.3
±0.3
0.2
10
0.1
0.5
1
18
16
0.56
●
H SUFFIX
MIN
TYP
±7
±25
±30
±35
MAX
±25
±95
±135
±165
UNITS
MAX
±25
±30
±70
±97
±115
±120
±150
±0.7
±1.1
±1.4
±1.8
1
50
25
●
●
●
●
●
●
●
●
●
●
●
μV
μV
μV
μV
μV
μV
μV
μV/°C
μV/°C
μV/°C
μV/°C
pA
pA
pA
pA
µV
P-P
nV/√Hz
nV/√Hz
fA/√Hz
ΔV
OS
⁄ΔT Input Offset Voltage Drift
(Note 5)
±0.2
±0.3
0.2
150
0.1
10
1
18
16
0.56
±0.7
±1.1
±1.4
1
350
100
I
B
I
OS
e
n
Input Bias Current
(Note 6)
Input Offset Current
(Note 6)
Input Noise Voltage
Input Noise Voltage Density
i
n
Input Noise Current Density
(Note 8)
Input Common Mode Range
V
–
Differential Input Capacitance
Common Mode Input
Capacitance
Common Mode Rejection
Ratio
All Packages
LTC6078AMS8
LTC6078AMS8
LTC6078MS8
LTC6078MS8
LTC6079GN
LTC6079GN
LTC6078DD, LTC6079DHC
LTC6078DD, LTC6079DHC
V
CM
= 0V to 3V
V
CM
= 0V to 3V
V
CM
= 0V to 1.7V
V
CM
= 0V to 3V
V
CM
= 0V to 1.7V
V
CM
= 0V to 3V
V
CM
= 0V to 1.7V
V
CM
= 0V to 3V
V
CM
= 0V to 1.7V
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
V
+
10
18
V
–
10
18
95
87
91
85
89
84
88
110
103
103
100
102
100
102
V
+
V
pF
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mV
mV
mV
C
DIFF
C
CM
CMRR
95
87
91
85
89
84
88
83
87
100
97
35
350
110
105
103
102
102
102
102
100
102
120
1
15
150
1
10
100
30
300
PSRR
V
OUT
Power Supply Rejection Ratio V
S
= 2.7V to 5.5V
Output Voltage, High
(Referred to V
+
)
Output Voltage, Low
(Referred to V
–
)
No Load
I
SOURCE
= 0.2mA
I
SOURCE
= 2mA
No Load
I
SINK
= 0.2mA
I
SINK
= 2mA
R
LOAD
= 10k, 0.5V ≤ V
OUT
≤ 2.5V
Source
Sink
A
V
= 1
R
L
= 100k
R
L
= 10k, C
L
= 200pF
A
V
= 1, 1V Step
100
97
40
400
120
1
15
150
1
10
100
35
350
mV
mV
mV
dB
mA
mA
V/μs
kHz
kHz
Deg
μs
60789fa
A
VOL
I
SC
SR
GBW
Φ
0
t
S
Large-Signal Voltage Gain
Output Short-Circuit Current
Slew Rate
Gain-Bandwidth Product
(f
TEST
= 10kHz)
Phase Margin
Settling Time 0.1%
115
5
7
420
360
130
10
14
0.05
750
66
24
110
4
6
420
320
125
10
14
0.05
750
66
24
●
3
LTC6078/LTC6079
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
I
S
Supply Current
(per Amplifier)
Shutdown Current
(per Amplifier)
V
S
Supply Voltage Range
Channel Separation
Shutdown Logic
t
ON
t
OFF
Turn on Time
Turn off Time
Leakage of SHDN Pin
CONDITIONS
No Load
●
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
TYP
54
●
●
H SUFFIX
MIN
TYP
54
MAX
72
80
UNITS
μA
μA
μA
MAX
72
78
1
5.5
Shutdown, V
SHDN
≤ 0.8V, LTC6078DD
Guaranteed by the PSRR Test
f
s
= 10kHz, R
L
= 10k
SHDN High, LTC6078DD
SHDN Low, LTC6078DD
V
SHDN
= 0.8V to 2V, LTC6078DD
V
SHDN
= 2V to 0.8V, LTC6078DD
V
SHDN
= 0V, LTC6078DD
0.3
2.7
–110
2
2.7
–110
2
5.5
V
dB
V
V
µs
µs
μA
●
●
0.8
50
2
0.6
50
2
0.8
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.
SYMBOL PARAMETER
V
OS
Offset Voltage
CONDITIONS
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
LTC6078AMS8
LTC6078MS8
LTC6078DD, LTC6079GN
LTC6079DHC
V
CM
= V
+
/2
V
CM
= V
+
/2
V
CM
= V
+
/2
V
CM
= V
+
/2
0.1Hz to 10Hz
f = 1kHz
f = 10kHz
C, I SUFFIXES
MIN
TYP
±10
±10
±20
±25
±30
±30
±35
±0.2
±0.3
±0.3
0.2
10
0.1
0.5
1
18
16
0.56
●
H SUFFIX
MIN
TYP
±10
±25
±30
±35
MAX
±30
±100
±140
±170
UNITS
MAX
±30
±35
±75
±102
±120
±125
±155
±0.7
±1.1
±1.4
±1.8
1
50
25
●
●
●
●
●
●
●
●
●
●
●
μV
μV
μV
μV
μV
μV
μV
μV/°C
μV/°C
μV/°C
μV/°C
pA
pA
pA
pA
µV
P-P
nV/√Hz
nV/√Hz
fA/√Hz
ΔV
OS
⁄ΔT Input Offset Voltage Drift
(Note 7)
±0.2
±0.3
0.2
150
0.1
10
1
18
16
0.56
±0.7
±1.1
±1.4
1
350
100
I
B
I
OS
e
n
Input Bias Current
Input Offset Current
Input Noise Voltage
Input Noise Voltage Density
i
n
Input Noise Current Density
(Note 8)
Input Common Mode Range
V
–
Differential Input Capacitance
Common Mode Input
Capacitance
V
+
10
18
V
–
10
18
V
+
V
pF
pF
C
DIFF
C
CM
60789fa
4
LTC6078/LTC6079
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
CMRR
Common Mode Rejection
Ratio
CONDITIONS
All Packages
LTC6078AMS8
LTC6078AMS8
LTC6078MS8
LTC6078MS8
LTC6079GN
LTC6079GN
LTC6078DD, LTC6079DHC
LTC6078DD, LTC6079DHC
V
CM
= 0V to 5V
V
CM
= 0V to 5V
V
CM
= 0V to 3.7V
V
CM
= 0V to 5V
V
CM
= 0V to 3.7V
V
CM
= 0V to 5V
V
CM
= 0V to 3.7V
V
CM
= 0V to 5V
V
CM
= 0V to 3.7V
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
MIN
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
H SUFFIX
MIN
91
90
94
88
90
86
90
TYP
105
105
105
100
105
100
105
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mV
mV
mV
45
450
mV
mV
mV
dB
mA
mA
V/μs
kHz
kHz
Deg
μs
74
84
5
5.5
μA
μA
μA
V
dB
1.2
V
V
µs
µs
μA
TYP
105
105
105
100
105
100
105
100
105
120
MAX
91
90
94
88
90
86
90
86
90
100
97
50
500
PSRR
V
OUT
Power Supply Rejection Ratio V
S
= 2.7V to 5.5V
Output Voltage, High
(Referred to V
+
)
Output Voltage, Low
(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
Source
Sink
A
V
= 1
R
L
= 100k
R
L
= 10k, C
L
= 200pF
A
V
= 1, 1V Step
No Load
120
97
2
20
200
1
15
150
110
12
12
420
320
125
25
25
0.05
750
66
24
74
82
5
5.5
2.7
–110
3.5
1.2
55
1.5
2
20
200
1
15
150
40
400
55
550
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
= 10kHz)
Phase Margin
Settling Time 0.1%
Supply Current
(per Amplifier)
Shutdown Current
(per Amplifier)
115
14
14
420
360
130
25
25
0.05
750
66
24
55
●
●
Shutdown, V
SHDN
≤ 1.2V, LTC6078DD
Guaranteed by the PSRR Test
f
s
= 10kHz, R
L
= 10k
SHDN High, LTC6078DD
SHDN Low, LTC6078DD
V
SHDN
= 1.2V to 3.5V, LTC6078DD
V
SHDN
= 1.2V to 3.5V, LTC6078DD
V
SHDN
= 0V, LTC6078DD
●
●
1.5
2.7
–110
3.5
50
2
0.6
V
S
Supply Voltage Range
Channel Separation
Shutdown Logic
●
●
t
ON
t
OFF
Turn on Time
Turn off Time
Leakage of SHDN Pin
50
2
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
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 amplifiers are shorted.
Note 3:
The LTC6078C/LTC6079C and LTC6078I/LTC6079I are guaranteed
functional over the operating temperature range of –40°C to 85°C. The
LTC6078H/LTC6079H are guaranteed functional over the operating
temperature range of –40°C to 125°C.
Note 4:
The LTC6078C/LTC6079C are guaranteed to meet specified
performance from 0°C to 70°C. The LTC6078C/LTC6079C are designed,
characterized and expected to meet specified performance from –40°C
to 85°C but are not tested or QA sampled at these temperatures. The
LTC6078I/LTC6079I are guaranteed to meet specified performance from
–40°C to 85°C. The LTC6078H/LTC6079H are guaranteed to meet specified
performance from –40°C to 125°C.
Note 5:
V
OS
and V
OS
drift are 100% tested at 25°C and 125°C.
Note 6:
I
B
and I
OS
are guaranteed by the V
S
= 5V test.
Note 7:
V
OS
drift is guaranteed by the V
S
= 3V test.
Note 8:
Current noise is calculated from i
n
= √2qI
B
, where q = 1.6 • 10
–19
coulomb.
60789fa
5
电源技术
