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LT2078AIS8#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LT2078/LT2079
20789fa
Micropower, Dual and
Quad, Single Supply,
Precision Op Amps
FEATURES
■
Supply Current per Amplifier: 50µA Max
■
Offset Voltage: 70µV Max
■
Offset Current: 250pA Max
■
Voltage Noise: 0.6µV
P-P
, 0.1Hz to 10Hz
■
Current Noise: 3pA
P-P
, 0.1Hz to 10Hz
■
Offset Voltage Drift: 0.4µV/°C
■
Gain Bandwidth Product: 200kHz
■
Slew Rate: 0.07V/µs
■
Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors Needed
■
Output Sources and Sinks 5mA Load Current
■
SO Package with Standard Pinout
DESCRIPTION
U
The LT
®
2078 is a micropower dual op amp in 8-pin small
outline, standard surface mount package, and LT2079 is
a micropower quad op amp offered in the standard 14-pin
surface mount package. Both devices are optimized for
single supply operation at 5V. ±15V specifications are also
provided.
Micropower performance of competing devices is achieved
at the expense of seriously degrading precision, noise,
speed and output drive specifications. The design effort of
the LT2078/LT2079 was concentrated on reducing sup-
ply current without sacrificing other parameters. The
offset voltage achieved is the lowest on any dual or quad
nonchopper stabilized op amp––micropower or other-
wise. Offset current, voltage and current noise, slew rate
and gain bandwidth product are all two to ten times better
than on previous micropower op amps.
Both the LT2078/LT2079 can be operated from a single
supply (as low as one lithium cell or two NiCd batteries).
The input range goes below ground. The all NPN output
stage swings to within a few millivolts of ground while
sinking current––no power consuming pull-down resis-
tors are needed. For applications requiring DIP packages
refer to the LT1078/LT1079.
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Battery or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Satellite Circuitry
■
Micropower Sample-and-Hold
■
Thermocouple Amplifier
■
Micropower Filters
TYPICAL APPLICATION
U
Single Battery, Micropower, Gain = 100, Instrumentation Amplifier Distribution of Input Offset Voltage
INPUT OFFSET VOLTAGE (µV)
–120
NUMBER OF OP AMPS
0
80
2078/79 • TA02
–80 –40 40
800
700
600
500
400
300
200
100
0
120
V
S
= 5V, 0V
5000 OP AMPS
–
+
–
+
INVERTING
–INPUT
1M
2
3
1
6
5
7
A
1/2 LT2078
10.1k
1M
10.1k
NONINVERTING
+INPUT
B
1/2 LT2078
4
8
3V
(Li-Ion)
OUT
TYPICAL PERFORMANCE
INPUT OFFSET VOLTAGE = 40µV
INPUT OFFSET CURRENT = 0.2nA
TOTAL POWER DISSIPATION = 240µW
COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED)
GAIN BANDWIDTH PRODUCT = 200kHz
OUTPUT NOISE = 85µV
P-P
0.1Hz TO 10Hz
= 300µV
RMS
OVER FULL BANDWIDTH
INPUT RANGE = 0.03V TO 1.8V
OUTPUT RANGE = 0.03V TO 2.3V
(0.3mV ≤ V
IN
+
– V
IN
–
≤ 23mV)
OUTPUTS SINK CURRENT—NO PULL-DOWN RESISTORS
LT2078/79 • TA01
APPLICATIONS
U
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
2
LT2078/LT2079
20789fa
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Supply Voltage ...................................................... ±22V
Differential Input Voltage ....................................... ±30V
Input Voltage ...............Equal to Positive Supply Voltage
............5V Below Negative Supply Voltage
Output Short-Circuit Duration.......................... Indefinite
Specified Temperature Range
Commercial ............................................. 0°C to 70°C
Industrial ............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
T
JMAX
= 150°C, θ
JA
= 150°C/ W
T
JMAX
= 150°C, θ
JA
= 190°C/W
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C, unless otherwise noted.
LT2078AC/LT2078AI LT2078C/LT2078I
LT2079AC/LT2079AI LT2079C/LT2079I
SYMBOL PARAMETER CONDITIONS (NOTE 2) MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT2078 30 70 40 120 µV
LT2079 35 110 40 150 µV
∆V
OS
Long Term Input Offset 0.4 0.5 µV/Mo
∆Time Voltage Stability
I
OS
Input Offset Current 0.05 0.25 0.05 0.35 nA
I
B
Input Bias Current 6 8 6 10 nA
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.6 1.2 0.6 µV
P-P
Input Noise Voltage Density f
O
= 10Hz (Note 3) 29 45 29 nV√Hz
f
O
= 1000Hz (Note 3) 28 37 28 nV√Hz
i
n
Input Noise Current 0.1Hz to 10Hz (Note 3) 2.3 4.0 2.3 pA
P-P
Input Noise Current Density f
O
= 10Hz (Note 3) 0.06 0.10 0.06 pA√Hz
f
O
= 1000Hz 0.02 0.02 pA√Hz
Input Resistance (Note 4)
Differential Mode 400 800 300 800 MΩ
Common Mode 6 6 GΩ
Input Voltage Range 3.5 3.8 3.5 3.8 V
0 –0.3 0 –0.3 V
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.5V 95 110 92 108 dB
PSRR Power Supply Rejection Ratio V
S
= 2.3V to 12V 100 114 98 114 dB
ELECTRICAL CHARACTERISTICS
ORDER PART
NUMBER
LT2078ACS8
LT2078AIS8
LT2078CS8
LT2078IS8
2078A
2078AI
2078
2078I
PART MARKING
PACKAGE/ORDER INFORMATION
W
UU
ORDER PART
NUMBER
LT2079ACS
LT2079AIS
LT2079CS
LT2079IS
1
2
3
4
8
7
6
5
TOP VIEW
V
+
OUT B
–IN B
+IN B
OUT A
–IN A
+IN A
V
–
S8 PACKAGE
8-LEAD PLASTIC SO
A
B
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
V
–
+IN C
–IN C
OUT C
A
D
B
C
(Note 1)
3
LT2078/LT2079
20789fa
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, 0°C ≤ T
A
≤ 70°C, unless otherwise noted (Note 7)
LT2078AI/LT2079AI LT2078I/LT2079I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT2078 ● 70 250 95 370 µV
LT2079 ● 80 280 100 400 µV
∆V
OS
Input Offset Voltage Drift LT2078 ● 0.4 1.8 0.5 2.5 µV/°C
∆T (Note 6) LT2079 ● 0.6 3.0 0.6 3.5 µV/°C
I
OS
Input Offset Current ● 0.07 0.70 0.1 1.0 nA
I
B
Input Bias Current ● 710 712 nA
CMRR Common Mode Rejection Ratio V
CM
= 0.05V to 3.2V ● 90 106 86 104 dB
PSRR Power Supply Rejection Ratio V
S
= 3.1V to 12V ● 96 110 92 110 dB
A
VOL
Large-Signal Voltage Gain V
O
= 0.05V to 4V, No Load ● 110 600 80 600 V/mV
V
O
= 0.05V to 3.5V, R
L
= 50k ● 80 400 60 400 V/mV
Maximum Output Voltage Output Low, No Load ● 4.5 8 4.5 8 mV
Swing Output Low, I
SINK
= 100µA ● 125 170 125 170 mV
Output High, No Load
● 3.9 4.2 3.9 4.2 V
Output High, 2k to GND ● 3.0 3.7 3.0 3.7 V
I
S
Supply Current per Amplifier ● 43 60 45 70 µA
ELECTRICAL CHARACTERISTICS
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C, unless otherwise noted.
LT2078AC/LT2078AI LT2078C/LT2078I
LT2079AC/LT2079AI LT2079C/LT2079I
SYMBOL PARAMETER CONDITIONS (NOTE 1) MIN TYP MAX MIN TYP MAX UNITS
A
VOL
Large-Signal Voltage Gain V
O
= 0.03V to 4V, No Load 200 1000 150 1000 V/mV
V
O
= 0.03V to 3.5V, R
L
= 50k 150 600 120 600 V/mV
Maximum Output Voltage Output Low, No Load 3.5 6 3.5 6 mV
Swing Output Low, 2k to GND 0.55 1.2 0.55 1.2 mV
Output Low, I
SINK
= 100µA 95 130 95 130 mV
Output High, No Load 4.2 4.4 4.2 4.4 V
Output High, 2k to GND 3.5 3.9 3.5 3.9 V
SR Slew Rate A
V
= 1, V
S
= ±2.5V 0.04 0.07 0.04 0.07 V/µs
GBW Gain Bandwidth Product f
O
≤ 20kHz 200 200 kHz
I
S
Supply Current per Amplifier 38 50 39 55 µA
Channel Separation ∆V
IN
= 3V, R
L
= 10k, f ≤ 10Hz 110 110 dB
Minimum Supply Voltage (Note 5) 2.2 2.3 2.2 2.3 V
LT2078AC/LT2079AC LT2078C/LT2079C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT2078 ● 50 150 60 240 µV
LT2079 ● 60 180 70 270 µV
∆V
OS
Input Offset Voltage Drift LT2078 ● 0.4 1.8 0.5 2.5 µV/°C
∆T (Note 6) LT2079 ● 0.5 3.0 0.6 3.5 µV/°C
I
OS
Input Offset Current ● 0.06 0.35 0.06 0.50 nA
I
B
Input Bias Current ● 69 611 nA
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.4V ● 92 108 88 106 dB
PSRR Power Supply Rejection Ratio V
S
= 2.6V to 12V ● 98 112 95 112 dB
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, –40°C ≤ T
A
≤ 85°C for I grades, unless otherwise noted.
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LT2078AIS8#TRPBF

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Manufacturer:
Analog Devices Inc.
Description:
Precision Amplifiers Dual uP Op Amp
Lifecycle:
New from this manufacturer.
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