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Linear Technology Electronic Components Datasheet

LT2078 Datasheet

Micropower/ Dual and Quad/ Single Supply/ Precision Op Amps

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FEATURES
s Supply Current per Amplifier: 50µA Max
s Offset Voltage: 70µV Max
s Offset Current: 250pA Max
s Voltage Noise: 0.6µVP-P, 0.1Hz to 10Hz
s Current Noise: 3pAP-P, 0.1Hz to 10Hz
s Offset Voltage Drift: 0.4µV/°C
s Gain Bandwidth Product: 200kHz
s Slew Rate: 0.07V/µs
s Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors Needed
s Output Sources and Sinks 5mA Load Current
s SO Package with Standard Pinout
U
APPLICATIONS
s Battery or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Satellite Circuitry
s Micropower Sample-and-Hold
s Thermocouple Amplifier
s Micropower Filters
LT 2078/LT 2079
Micropower, Dual and
Quad, Single Supply,
Precision Op Amps
DESCRIPTION
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.
TYPICAL APPLICATION
Single Battery, Micropower, Gain = 100, Instrumentation Amplifier
10.1k
1M
1M 2
A
INVERTING 3 +1/2 LT2078
–INPUT
1 10.1k
3V
(Li-Ion)
68
B
NONINVERTING 5 +1/2 LT2078
+INPUT
4
7
OUT
LT2078/79 • TA01
TYPICAL PERFORMANCE
INPUT OFFSET VOLTAGE = 40µV
INPUT OFFSET CURRENT = 0.2nA
OUTPUT NOISE = 85µVP-P 0.1Hz TO 10Hz
= 300µVRMS OVER FULL BANDWIDTH
INPUT RANGE = 0.03V TO 1.8V
TOTAL POWER DISSIPATION = 240µW
OUTPUT RANGE = 0.03V TO 2.3V
COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED)
(0.3mV VIN+ – VIN– 23mV)
GAIN BANDWIDTH PRODUCT = 200kHz
OUTPUTS SINK CURRENT—NO PULL-DOWN RESISTORS
Distribution of Input Offset Voltage
800
VS = 5V, 0V
700 5000 OP AMPS
600
500
400
300
200
100
0
–120
–80 –40 0 40 80
INPUT OFFSET VOLTAGE (µV)
120
2078/79 • TA02
20789fa
1


Linear Technology Electronic Components Datasheet

LT2078 Datasheet

Micropower/ Dual and Quad/ Single Supply/ Precision Op Amps

No Preview Available !

LT2078/LT 2079
ABSOLUTE MAXIMUM RATINGS (Note 1)
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
PACKAGE/ORDER INFORMATION
OUT A 1
–IN A 2
+IN A 3
V4
TOP VIEW
A
B
8 V+
7 OUT B
6 –IN B
5 +IN B
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 190°C/ W
ORDER PART
NUMBER
LT2078ACS8
LT2078AIS8
LT2078CS8
LT2078IS8
PART MARKING
2078A 2078
2078AI 2078I
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
A
B
14 OUT D
13 –IN D
D
12 +IN D
11 V
10 +IN C
C
9 –IN C
8 OUT C
S PACKAGE
14-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 150°C/ W
ORDER PART
NUMBER
LT2079ACS
LT2079AIS
LT2079CS
LT2079IS
ELECTRICAL CHARACTERISTICS VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
VOS Input Offset Voltage
CONDITIONS (NOTE 2)
LT2078
LT2079
LT2078AC/LT2078AI
LT2079AC/LT2079AI
MIN TYP MAX
30 70
35 110
LT2078C/LT2078I
LT2079C/LT2079I
MIN TYP MAX
40 120
40 150
UNITS
µV
µV
VOS
Time
IOS
IB
en
Long Term Input Offset
Voltage Stability
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Voltage Density
in Input Noise Current
Input Noise Current Density
Input Resistance
Differential Mode
Common Mode
Input Voltage Range
0.1Hz to 10Hz (Note 3)
fO = 10Hz (Note 3)
fO = 1000Hz (Note 3)
0.1Hz to 10Hz (Note 3)
fO = 10Hz (Note 3)
fO = 1000Hz
(Note 4)
CMRR
PSRR
Common Mode Rejection Ratio VCM = 0V to 3.5V
Power Supply Rejection Ratio VS = 2.3V to 12V
0.4 0.5 µV/Mo
0.05 0.25
68
0.6 1.2
29 45
28 37
2.3 4.0
0.06 0.10
0.02
0.05 0.35
nA
6 10
nA
0.6 µVP-P
29 nVHz
28 nVHz
2.3 pAP-P
0.06 pAHz
0.02 pAHz
400 800
6
3.5 3.8
0 – 0.3
95 110
100 114
300 800
6
3.5 3.8
0 – 0.3
92 108
98 114
M
G
V
V
dB
dB
20789fa
2


Part Number LT2078
Description Micropower/ Dual and Quad/ Single Supply/ Precision Op Amps
Maker Linear Technology
PDF Download

LT2078 Datasheet PDF






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