LTC2053_15 Datasheet, PDF (1/18 Pages) Linear Technology – Precision, Rail-to-Rail, Zero-Drift, Resistor-Programmable Instrumentation Amplifier

LTC2053/LTC2053-SYNC
Features
Precision, Rail-to-Rail,
Zero-Drift, Resistor-Programmable
Instrumentation Amplifier
Description
n _{116dB CMRR Independent of Gain}
n _{Maximum Offset Voltage: 10µV}
n _{Maximum Offset Voltage Drift: 50nV/°C}
n _{Rail-to-Rail Input}
n _{Rail-to-Rail Output}
n _{2-Resistor Programmable Gain}
n _{Supply Operation: 2.7V to ±5.5V}
n _{Typical Noise: 2.5µVP-P (0.01Hz to 10Hz)}
n _{Typical Supply Current: 750µA}
n _{LTC2053-SYNC Allows Synchronization to}
External Clock
n _{Available in MS8 and 3mm × 3mm × 0.8mm}
DFN Packages
Applications
n _{Thermocouple Amplifiers}
n _{Electronic Scales}
n _{Medical Instrumentation}
n _{Strain Gauge Amplifiers}
n _{High Resolution Data Acquisition}
The LTC^®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 10µV with a temperature
drift of less than 50nV/°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 op-
erational 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 ±5.5V supplies. The LTC2053
requires no external clock, while the LTC2053-SYNC has
a CLK pin to synchronize to an external clock.
The LTC2053 is available in an MS8 surface mount pack-
age. For space limited applications, the LTC2053 is avail-
able in a 3mm × 3mm × 0.8mm dual fine pitch leadless
package (DFN).
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Differential Bridge Amplifier
3V
0.1µF
R < 10k
8
2_–
LTC2053
3₊
5
1, 4
7
6
R2 10k
0.1µF
R1
10Ω
OUT
R2
GAIN = 1+
R1
2053 TA01
Typical Input Referred Offset vs Input
Common Mode Voltage (V_S = 3V)
15
V_S = 3V
V_REF = 0V
10 TA = 25°C
5
0
–5
–10
–15
0
G = 1000
G = 100
G = 10
G=1
0.5 1.0 1.5 2.0 2.5 3.0
INPUT COMMON MODE VOLTAGE (V)
2053 TA01b
2053syncfc