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PDF INA111 Data sheet ( Hoja de datos )

Número de pieza INA111
Descripción High Speed FET-Input INSTRUMENTATION AMPLIFIER
Fabricantes Burr-Brown Corporation 
Logotipo Burr-Brown Corporation Logotipo



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No Preview Available ! INA111 Hoja de datos, Descripción, Manual

® INA111
INA111
INA111
High Speed FET-Input
INSTRUMENTATION AMPLIFIER
FEATURES
q FET INPUT: I = 20pA max
B
q HIGH SPEED: TS = 4µs (G = 100, 0.01%)
q LOW OFFSET VOLTAGE: 500µV max
q LOW OFFSET VOLTAGE DRIFT:
5µV/°C max
q HIGH COMMON-MODE REJECTION:
106dB min
q 8-PIN PLASTIC DIP, SOL-16 SOIC
APPLICATIONS
q MEDICAL INSTRUMENTATION
q DATA ACQUISITION
DESCRIPTION
The INA111 is a high speed, FET-input instrumenta-
tion amplifier offering excellent performance.
The INA111 uses a current-feedback topology provid-
ing extended bandwidth (2MHz at G = 10) and fast
settling time (4µs to 0.01% at G = 100). A single
external resistor sets any gain from 1 to over 1000.
Offset voltage and drift are laser trimmed for excellent
DC accuracy. The INA111’s FET inputs reduce input
bias current to under 20pA, simplifying input filtering
and limiting circuitry.
The INA111 is available in 8-pin plastic DIP, and
SOL-16 surface-mount packages, specified for the
–40°C to +85°C temperature range.
–2
VIN (4)
1
(2)
RG
8
(15)
+3
VIN (5)
V+
7 (13)
A1
25k
10k
25k
A2
10k
INA111
10k
Feedback
(12)
DIP Connected
Internally
A3
10k
6
(11) VO
5
Ref
(10)
G = 1 + 50k
RG
4 (7)
DIP (SOIC)
V–
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1992 Burr-Brown Corporation
PDS-11143E
INA111Printed in U.S.A. March, 1998
®

1 page




INA111 pdf
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, unless otherwise noted.
OFFSET VOLTAGE WARM-UP vs TIME
75
50
25
0
G 10
–25
–50
G=1
–75
0
1 234
Time From Power Supply Turn-On (Minutes)
300
200
100
0
–100
–200
–300
5
10n
1n
100p
INPUT BIAS CURRENT vs TEMPERATURE
Ib
IOS
10p
1p
0.1p
0.01p
–75 –50 –25 0 25 50 75 100 125
Temperature (°C)
–10m
–1m
INPUT BIAS CURRENT
vs DIFFERENTIAL INPUT VOLTAGE
–15.7V
–100µ
–10µ
+1p
G=1
+10p
G = 10 G = 100 G = 1k
G = 1k
G = 10
G = 100
+100p
–20 –15 –10 –5
0
5 10
Differential Overload Voltage (V)
NOTE: One input grounded.
G=1
+15.7V
15 20
–10m
–1m
INPUT BIAS CURRENT
vs COMMON-MODE INPUT VOLTAGE
–15.7V
–100µ
–10µ
+1p
+15.7V
+10p
–20 –15 –10 –5
0
5 10 15 20
Common-Mode Voltage (V)
MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY
30
25
20
15
10
5
0
1k 10k 100k 1M 10M
Frequency (Hz)
OUTPUT CURRENT LIMIT vs TEMPERATURE
50
40
30
–ICL
+ICL
20
10
0
–75 –50 –25
0 25 50
Temperature (°C)
75 100 125
®
5 INA111

5 Page





INA111 arduino
VIN RG INA111
+
Ref
C1
0.1µF
VO
R1
1M
OPA602
f–3dB =
1
2πR1C1
= 1.59Hz
VIN
OPA177
C1
50nF
R1
10k
INA111
Ref
RG R2
Make
G 10
where
G
=1
+
50k
RG
Load
IL
=
VIN
G R2
FIGURE 11. AC-Coupled Instrumentation Amplifier.
FIGURE 12. Voltage Controlled Current Source.
VI–N
VI+N
NOTE: Driving the shield minimizes CMR degradation
due to unequally distributed capacitance on the input
line. The shield is driven at approximately 1V below
the common-mode input voltage.
FIGURE 13. Shield Driver Circuit.
100
OPA602
22.1k
22.1k
511INA111
Ref
For G = 100
RG = 511// 2(22.1k)
effective RG = 505
VO
+
Channel 1 VIN
Channel 8
VIN
+
MPC800
MUX
RG INA111
Ref
+5V
ADS574
12 Bits
Out
FIGURE 14. Multiplexed-Input Data Acquisition System.
®
11 INA111

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