LTC6800_15 Datasheet, PDF (1/14 Pages) Linear Technology – Rail-to-Rail, Input and Output, Instrumentation Amplifier

Features
n _{116dB CMRR Independent of Gain}
n _{Maximum Offset Voltage: 100µV}
n _{Maximum Offset Voltage Drift: 250nV/°C}
n _{–40°C to 125°C Operation}
n _{Rail-to-Rail Input Range}
n _{Rail-to-Rail Output Swing}
n _{Supply Operation: 2.7V to 5.5V}
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}
LTC6800
Rail-to-Rail,
Input and Output,
Instrumentation Amplifier
Description
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 guaranteed
below 100µV with a temperature drift of less than 250nV/°C.
The LTC6800 is easy to use; the gain is adjustable 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).
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
High Side Power Supply Current Sense
V_REGULATOR
1.5mΩ
2– 8
7
LTC6800
3+
6
5
10k
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
6800fb