LTC2053_1 Datasheet, PDF (1/16 Pages) Linear Technology – Precision, Rail-to-Rail,Zero-Drift, Resistor-Programmable Instrumentation Amplifier

LTC2053/LTC2053-SYNC
Precision, Rail-to-Rail,
Zero-Drift, Resistor-Programmable
Instrumentation Amplifier
FEATURES
■ _{116dB CMRR Independent of Gain}
■ _{Maximum Offset Voltage: 10µV}
■ _{Maximum Offset Voltage Drift: 50nV/°C}
■ _{Rail-to-Rail Input}
■ _{Rail-to-Rail Output}
■ _{2-Resistor Programmable Gain}
■ _{Supply Operation: 2.7V to ±5.5V}
■ _{Typical Noise: 2.5µVP-P (0.01Hz to 10Hz)}
■ _{Typical Supply Current: 750µA}
■ _{LTC2053-SYNC Allows Synchronization to}
External Clock
■ _{Available in MS8 and 3mm × 3mm × 0.8mm}
DFN Packages
U
APPLICATIO S
■ _{Thermocouple Amplifiers}
■ _{Electronic Scales}
■ _{Medical Instrumentation}
■ _{Strain Gauge Amplifiers}
■ _{High Resolution Data Acquisition}
DESCRIPTIO
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
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 ±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).
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Differential Bridge Amplifier
3V
0.1µF
R < 10k
2
3
8
–
LTC2053
+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
2053syncfb
1