LTC2053
Precision, Rail-to-Rail
Input and Output, Zero-Drift Instrumentation
Amplifier with Resistor-Programmable Gain
FEATURES
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DESCRIPTIO
116dB CMRR Independent of Gain
Maximum Offset Voltage: 10碌V
Maximum Offset Voltage Drift: 50nV/擄C
Rail-to-Rail Input
Rail-to-Rail Output
2-Resistor Programmable Gain
Supply Operation: 2.7V to
鹵5.5V
Typical Noise: 2.5碌V
P-P
(0.01Hz to 10Hz)
Typical Supply Current: 750碌A
Available in an MS8 and 3mm
脳
3mm
脳
0.8mm
DFN Packages
The LTC
廬
2053 is a high precision instrumentation ampli-
fier. The CMRR is typically 116dB with a single or dual 5V
supply and is independent of gain. The input offset voltage
is guaranteed below 10碌V with a temperature drift of less
than 50nV/擄C. The LTC2053 is easy to use; the gain is
adjustable with two external resistors, like a traditional
op amp.
The LTC2053 uses charge balanced sampled data tech-
niques to convert a differential input voltage into a single
ended signal that is in turn amplified by a zero-drift
operational amplifier.
The differential inputs operate from rail-to-rail and the
single ended output swings from rail-to-rail. The LTC2053
can be used in single supply applications, as low as 2.7V.
It can also be used with dual
鹵5.5V
supplies. The LTC2053
is available in an MS8 surface mount package. For space
limited applications, the LTC2053 is available in a
3mm
脳
3mm
脳
0.8mm dual fine pitch leadless package
(DFN).
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Thermocouple Amplifiers
Electronic Scales
Medical Instrumentation
Strain Gauge Amplifiers
High Resolution Data Acquisition
TYPICAL APPLICATIO
3V
Differential Bridge Amplifier
0.1碌F
R < 10k
2
8
INPUT OFFSET VOLTAGE (碌V)
Typical Input Referred Offset vs Input
Common Mode Voltage (V
S
= 3V)
15
10
5
0
鈥?
G = 10
鈥?0
G=1
鈥?5
2053 TA01
V
S
= 3V
V
REF
= 0V
T
A
= 25擄C
鈥?/div>
LTC2053
7
6
5
1, 4
GAIN = 1+
0.1碌F
R1
10鈩?/div>
R2 10k
R2
R1
OUT
3
+
0
1.0
1.5
2.0
2.5
0.5
INPUT COMMON MODE VOLTAGE (V)
U
G = 1000
G = 100
3.0
2053 G01
U
U
2053fa
1
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