LT 2078/LT 2079
Micropower, Dual and
Quad, Single Supply,
Precision Op Amps
FEATURES
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DESCRIPTION
The LT
廬
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.
鹵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鈥撯€搈icropower 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鈥撯€搉o 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.
s
SO Package with Standard Pinout
Supply Current per Amplifier: 50碌A(chǔ) Max
Offset Voltage: 70碌V Max
Offset Current: 250pA Max
Voltage Noise: 0.6碌V
P-P
, 0.1Hz to 10Hz
Current Noise: 3pA
P-P
, 0.1Hz to 10Hz
Offset Voltage Drift: 0.4碌V/擄C
Gain Bandwidth Product: 200kHz
Slew Rate: 0.07V/碌s
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
APPLICATIONS
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Battery or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Satellite Circuitry
Micropower Sample-and-Hold
Thermocouple Amplifier
Micropower Filters
TYPICAL APPLICATION
Single Battery, Micropower, Gain = 100, Instrumentation Amplifier
10.1k
1M
1M
3V
(Li-Ion)
8
7
OUT
Distribution of Input Offset Voltage
800
700
V
S
= 5V, 0V
5000 OP AMPS
TYPICAL PERFORMANCE
INPUT OFFSET VOLTAGE = 40碌V
INPUT OFFSET CURRENT = 0.2nA
TOTAL POWER DISSIPATION = 240碌W
COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED)
GAIN BANDWIDTH PRODUCT = 200kHz
OUTPUT NOISE = 85
碌V
P-P
0.1Hz TO 10Hz
= 300
碌V
RMS
OVER FULL BANDWIDTH
INPUT RANGE = 0.03V TO 1.8V
OUTPUT RANGE= 0.03V TO 2.3V
(0.3mV
鈮?/div>
V
IN+
鈥?V
IN鈥?/div>
鈮?/div>
23mV)
OUTPUTS SINK CURRENT鈥擭O PULL-DOWN RESISTORS
+
+
INVERTING 3
鈥揑NPUT
NONINVERTING 5
+INPUT
鈥?/div>
A
1/2 LT2078
1
10.1k
6
NUMBER OF OP AMPS
鈥?/div>
2
600
500
400
300
200
100
0
鈥?20
鈥?0
40
80
0
INPUT OFFSET VOLTAGE (碌V)
鈥?0
120
2078/79 鈥?TA02
B
1/2 LT2078
4
LT2078/79 鈥?TA01
U
U
U
1
LT2079I相關(guān)型號PDF文件下載
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英文版
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英文版
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英文版
LT Series: 25/30 WATT Wide Input Range
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英文版
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英文版
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英文版
LT Series: 25/30 WATT Wide Input Range
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英文版
GaAs Hall IC for Fan Motor with Variable Speed by Temperatur...
SHARP [Sha...
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英文版
LT Series: 25/30 WATT Wide Input Range
ETC
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英文版
LT Series: 25/30 WATT Wide Input Range
ETC [ETC]
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英文版
LT Series: 25/30 WATT Wide Input Range
ETC
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英文版
LT Series: 25/30 WATT Wide Input Range
ETC [ETC]
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英文版
LT Series: 25/30 WATT Wide Input Range
ETC
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