LTC6800
Rail-to-Rail
Input and Output,
Instrumentation Amplifier
FEATURES
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DESCRIPTIO
116dB CMRR Independent of Gain
Maximum Offset Voltage: 100碌V
Maximum Offset Voltage Drift: 250nV/擄C
鈥?40擄C to 125擄C Operation
Rail-to-Rail Input Range
Rail-to-Rail Output Swing
Supply Operation: 2.7V to 5.5V
Available in an MS8 and 3mm
脳
3mm
脳
0.8mm
DFN Packages
The LTC
廬
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 100碌V with a temperature drift of less than
250nV/擄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
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
High Side Power Supply Current Sense
1.5m鈩?/div>
V
REGULATOR
Typical Input Referred Offset vs
Input Common Mode Voltage (V
S
= 3V)
15
10
V
S
= 3V
V
REF
= 0V
T
A
= 25擄C
6
5
4
10k
0.1碌F
V
OS
(碌V)
+
3
鈥?/div>
2
8
7
LTC6800
OUT
100mV/A
OF LOAD
CURRENT
I
LOAD
5
0
鈥?
G = 10
鈥?0
6800 TA01
LOAD
150鈩?/div>
鈥?5
0
1
1.5
2
2.5
0.5
INPUT COMMON MODE VOLTAGE (V)
U
G = 1000
G = 100
G=1
3
6800 TA02
U
U
6800fa
1
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