LTC6800 Datasheet, PDF (1/12 Pages) Linear Technology – Input and Output, Instrumentation Amplifier

FEATURES
s _{116dB CMRR Independent of Gain}
s _{Maximum Offset Voltage: 100µV}
s _{Maximum Offset Voltage Drift: 250nV/°C}
s _{– 40°C to 125°C Operation}
s _{Rail-to-Rail Input Range}
s _{Rail-to-Rail Output Swing}
s _{Supply Operation: 2.7V to 5.5V}
s _{Available in an MS8 and 3mm × 3mm × 0.8mm}
DFN Packages
U
APPLICATIO S
s _{Thermocouple Amplifiers}
s _{Electronic Scales}
s _{Medical Instrumentation}
s _{Strain Gauge Amplifiers}
s _{High Resolution Data Acquisition}
LTC6800
Rail-to-Rail
Input and Output,
Instrumentation Amplifier
DESCRIPTIO
The LTC^®6800 is a precision instrumentation amplifier.
The CMRR is typically 116dB with a single 5V supply and
is independent of gain. The input offset voltage is guaran-
teed below 100µV with a temperature drift of less than
250nV/°C. The LTC6800 is easy to use; the gain is adjust-
able with two external resistors, like a traditional op amp.
The LTC6800 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 LTC6800
is available in an MS8 surface mount package. For space
limited applications, the LTC6800 is available in a
3mm × 3mm × 0.8mm dual fine pitch leadless package
(DFN).
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
High Side Power Supply Current Sense
V_REGULATOR
1.5mΩ
2– 8
7
LTC6800
3+
6 _10k
5
4
0.1µF
150Ω
OUT
100mV/A
OF LOAD
CURRENT
I_LOAD LOAD
6800 TA01
Typical Input Referred Offset vs
Input Common Mode Voltage (V_S = 3V)
15
V_S = 3V
V_REF = 0V
10 T_A = 25°C
5
0
–5
–10
–15
0
G = 1000
G = 100
G = 10
G=1
0.5 1 1.5 2 2.5 3
INPUT COMMON MODE VOLTAGE (V)
6800 TA02
6800fa
1