FT1100
Precision, Zero-Drift
Instrumentation Amplifier
Equivalent LT1100
Features
■
■
■
■
■
■
■
■
■
■
Offset Voltage: 10µV Max
Offset Voltage Drift: 100nV/°C Max
Bias Current: 65pA Max
Offset Current: 65pA Max
Gain Nonlinearity: 20ppm Max
Gain Error:
±0.075%
Max
CMRR: 90dB
0.1Hz to 10Hz Noise: 1.9µV
P-P
Single 5V Supply Operation
8-Pin MiniDIP
The
FT1100
is a high precision instrumentation amplifier
using zero-drift techniques to achieve outstanding DC
performance. The input DC offset is typically 1µV while
the DC offset drift is typically 5nV/°C; a very low bias
current of 65pA is also achieved.
The
FT1100
is self-contained; that is, it achieves a differ-
ential gain of 100 without any external gain setting resistor
or trim pot. The gain linearity is 20ppm and the gain drift is
4ppm/°C. The
FT1100
operates from a single 5V supply
up to
±8V.
The output typically swings 300mV from its
power supply rails with a 10k load.
An optional external capacitor can be added from Pin 7 to
Pin 8 to tailor the device’s 18kHz bandwidth and to
eliminate any unwanted noise pickup.
The
FT1100
is also offered in a 16-pin surface mount
package with selectable gains of 10 or 100.
Applications
■
■
■
Thermocouple Amplifiers
Strain Gauge Amplifiers
Differential
to Single-Ended Converters
Single 5V Supply, DC Instrumentation Amplifier
1
2
–V
IN
3
4
FT1100
8
7
6
5
0.01µF
V
IN
V
OUT
V
+
= 5V
0.1µF
V
OUT
= 100 [V
IN
– (–V
IN
)]
U
Description
U
U
FT1100
Precision, Zero-Drift
Instrumentation Amplifier
Absolute Maximum Ratings
Operating Temperature Range
FT1100M/AM ................................
−55°C
to 125°C
FT1100C
.........................................
−40°C
to 85°C
Output Short Circuit Duration ......................... Indefinite
Storage Temperature Range ................
−65°C
to 150°C
Total Supply Voltage (V
+
to V
−
) ............................. 18V
Input Voltage ....................... (V
+
+
0.3V) to (V
−
−
0.3V)
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
GND REF 1
CMRR 2
–V
IN
3
V
–
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
OUT
COMP
V
IN
V
+
ORDER PART
NUMBER
FT1100CN8
T
JMAX
= 110°C,
θ
JA
= 130°C/W
J PACKAGE
8-LEAD CERDIP
T
JMAX
= 150°C,
θ
JA
= 100°C/W
FT1100CJ8
FT1100AMJ8
FT1100MJ8
Electrical Characteristics
PARAMETER
Gain Error
CONDITIONS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±
5V, R
L
= 10k,
C
C
= 1000pF, unless otherwise noted.
FT1100ACN
MIN
TYP
0.01
●
Gain Nonlinearity
●
Input Offset Voltage
Input Offset Voltage Drift
Input Noise Voltage
Input Bias Current
(Note 2)
(Note 2)
DC to 10Hz, T
A
= 25°C
●
●
Input Offset Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Supply Current
V
CM
= 2.3V to
−4.7V
(Note 3)
V
S
=
±2.375V
to
±8V
R
L
= 2k, V
S
=
±8V
R
L
=10k, V
S
=
±8V
Internal Sampling Frequency
Bandwidth
U
TOP VIEW
NC 1
GND REF 2
G = 10 3
CMRR 4
NC 5
–V
IN
6
V
–
7
NC 8
16 NC
15 V
OUT
14 G = 10
13 COMP
12 NC
11 V
IN
10 V
+
9
NC
Order/Package Information
W
U
ORDER PART
NUMBER
FT1100CSW
SW PACKAGE
16-LEAD PLASTIC SO WIDE
T
JMAX
= 110°C,
θ
JA
= 100°C/W
MAX
0.05
0.10
8
30
±10
±100
50
120
50
FT1100CN/CJ
MIN
TYP
MAX
0.01
3
12
±1
±5
1.9
2.5
10
90
105
110
6.2
7.5
2.4
3.4
2.8
18
3.3
4.5
65
135
65
0.075
0.150
20
60
±10
±100
UNITS
±%
±%
ppm
ppm
µV
nV/°C
µV
P-P
pA
pA
pA
dB
dB
V
V
mA
mA
kHz
kHz
3
12
±1
±5
1.9
2.5
●
●
●
●
●
●
10
104
120
– 7.2
– 7.7
2.4
3.4
2.8
18
115
6.2
7.5
2.8
4.0
– 7.2
– 7.7
Ashley Crt, Henley,
Marlborough, Wilts, SN8 3RH UK
Tel: +44(0)1264 731200
Fax:+44(0)1264 731444
E-mail
sales@forcetechnologies.co.uk
www.forcetechnologies.co.uk
Unless otherwise stated in this SCD/Data sheet, Force Technologies Ltd reserve the right to make changes, without notice, in the products, Includ
-ing circuits, cells and/or software, described or contained herein in order to improve design and/or performance. Force Technologies resumes no
responsibility or liability for the use of any of these products, conveys no licence or any title under patent, copyright, or mask work to these
products, and makes no representation or warranties that that these products are free from patent, copyright or mask work infringement, unless
otherwise specified.
Life Support Applications
Force Technologies products are not designed for use in life support appliances, devices or systems where malfunction of a Force Technologies
product can reasonably be expected to result in a personal injury. Force Technologies customers using or selling Force Technologies products
for use in such applications do so at their own risk and agree to fully indemnify Force Technologies for any damages resulting from such
improper use or sale.
All trademarks acknowledged
Copyright Force Technologies Ltd 2008
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