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LTC2050 数据手册 - Liner
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LTC2050数据手册
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1
LTC2050
Zero-Drift
Operational Amplifier
in SOT-23
November 1999
■
Thermocouple Amplifiers
■
Electronic Scales
■
Medical Instrumentation
■
Strain Gauge Amplifiers
■
High Resolution Data Acquisition
■
DC Accurate RC Active Filters
U
S
A
O
PP
L
IC
AT
I
■
SOT-23 Package
■
Maximum Offset Voltage of 3µV
■
Maximum Offset Voltage Drift of 30nV/°C
■
Noise: 1.5µV
P-P
(0.1Hz to 10Hz Typ)
■
Voltage Gain: 140dB (Typ)
■
PSRR: 130dB (Typ)
■
CMRR: 130dB (Typ)
■
Supply Current: 0.8mA (Typ)
■
Single Supply Operation: 2.7V to 6V
■
Extended Common Mode Input Range
■
Output Swings Rail-to-Rail
■
Overload Recovery Time: 2ms (Typ)
S
F
EA
T
U
RE
D
U
ESCRIPTIO
The LTC
®
2050 is a low drift operational amplifier available
in the 5- or 6-lead SOT-23 and SO-8 packages. It operates
from a single 2.7V supply while still supporting 5V appli-
cations. The power consumption is 800µA and the ver-
sions in the 6-lead SOT-23 and SO-8 packages offer power
shutdown (active low).
The LTC2050, despite its miniature size, features uncom-
promising DC performance. The typical input offset volt-
age and offset drift are 0.5µV and 10nV/°C. The almost
zero DC offset and drift are supported with a power supply
rejection ratio (PSRR) and common mode rejection ratio
(CMRR) of more than 130dB.
The input common mode voltage ranges from the negative
supply up to 1V from the positive supply. The LTC2050
also has an enhanced output stage capable of driving
loads as low as 1kΩ to both supply rails. The open-loop
gain, loaded with 1kΩ, is in excess of 140dB. The LTC2050
also features a 1.5µV
P-P
DC to 10Hz noise and a 3MHz gain
bandwidth product.
Input Referred Noise 0.1Hz to 10Hz
Differential Bridge Amplifier
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
, LTC and LT are registered trademarks of Linear Technology Corporation.
–
+
5V
1000pF
18.2k
1000pF
18.2k
7
6
4
3
2
0.1µF
5V
A
V
= 100
2050 TA01
350Ω
STRAIN
GAUGE
50Ω
GAIN
TRIM
LTC2050
TIME (s)
0
µV
3
1
8
LT2050 TA02
0
–1
–3
2
4
6
10
V
S
= 5V
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Final Electrical Specifications
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