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PDF INA118 Data sheet ( Hoja de datos )
| Número de pieza | INA118 | |
| Descripción | Precision/ Low Power INSTRUMENTATION AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de INA118 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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®
INA118
INA118
INA118
Precision, Low Power
INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 50µV max
q LOW DRIFT: 0.5µV/°C max
q LOW INPUT BIAS CURRENT: 5nA max
q HIGH CMR: 110dB min
q INPUTS PROTECTED TO ±40V
q WIDE SUPPLY RANGE: ±1.35 to ±18V
q LOW QUIESCENT CURRENT: 350µA
q 8-PIN PLASTIC DIP, SO-8
APPLICATIONS
q BRIDGE AMPLIFIER
q THERMOCOUPLE AMPLIFIER
q RTD SENSOR AMPLIFIER
q MEDICAL INSTRUMENTATION
q DATA ACQUISITION
DESCRIPTION
The INA118 is a low power, general purpose instru-
mentation amplifier offering excellent accuracy. Its
versatile 3-op amp design and small size make it ideal
for a wide range of applications. Current-feedback
input circuitry provides wide bandwidth even at high
gain (70kHz at G = 100).
A single external resistor sets any gain from 1 to 10,000.
Internal input protection can withstand up to ±40V
without damage.
The INA118 is laser trimmed for very low offset voltage
(50µV), drift (0.5µV/°C) and high common-mode re-
jection (110dB at G = 1000). It operates with power
supplies as low as ±1.35V, and quiescent current is only
350µA—ideal for battery operated systems.
The INA118 is available in 8-pin plastic DIP,
and SO-8 surface-mount packages, specified for
the –40°C to +85°C temperature range.
– 2 Over-Voltage
VIN Protection
1
RG
8
+ 3 Over-Voltage
VIN Protection
A1
25kΩ
25kΩ
A2
V+
7
INA118
60kΩ
60kΩ
A3
60kΩ
4
V–
60kΩ
G = 1 + 50kΩ
RG
6
VO
5
Ref
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
©1994 Burr-Brown Corporation
PDS-11199D
INA118Printed in U.S.A. April, 1998
®
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, unless otherwise noted.
160
140
120
100
80
60
40
20
0
1
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
G = 1000
G = 100
G = 10
G=1
10 100 1k 10k 100k
Frequency (Hz)
160
140
120
100
80
60
40
20
0
10
NEGATIVE POWER SUPPLY REJECTION
vs FREQUENCY
G = 100
G = 1000
G = 10
G=1
100 1k
Frequency (Hz)
10k
100k
INPUT- REFERRED NOISE VOLTAGE
vs FREQUENCY
1k
100
100
10
1
1
G=1
10
G = 10
G = 100, 1000
G = 1000 BW Limit
1
Current Noise
(All Gains)
0.1
10 100 1k 10k
Frequency (Hz)
1000
100
10
1
SETTLING TIME vs GAIN
RL = 10kΩ
CL = 100pF
0.01%
0.1%
10 100
Gain (V/V)
1000
QUIESCENT CURRENT and SLEW RATE
vs TEMPERATURE
500 1.5
400
Slew Rate
1
IQ VS = ±15V
300 0.5
VS = ±1.35V
200
–75 –50 –25
0 25 50
Temperature (°C)
0
75 100 125
10
8
6
4
2
0
–2
–4 G = 1
–6
–8
–10
–40
INPUT BIAS CURRENT
vs INPUT OVERLOAD VOLTAGE
G = 1000
G = 1000
G=1
0
Overload Voltage (V)
40
®
5 INA118
5 Page 
+3V
300 Ω
150Ω
R1 (1)
2V – ∆V
RG
2V + ∆V
3V
INA118
Ref
VO
NOTE: (1) R1 required to create proper common-mode voltage,
only for low voltage operation — see text.
FIGURE 5. Single-Supply Bridge Amplifier.
–
VIN RG INA118
+
Ref
C1
0.1µF
VO
R1
1MΩ
OPA602
f–3dB =
1
2πR1C1
= 1.59Hz
FIGURE 6. AC-Coupled Instrumentation Amplifier.
10.0V
R1 R2
V+
6
REF102 2
4
Pt100
Cu
K
Cu
VO
RG INA118
R3
100Ω = RTD at 0°C
Ref
ISA
TYPE
E
J
K
T
MATERIAL
+ Chromel
– Constantan
+ Iron
– Constantan
+ Chromel
– Alumel
+ Copper
– Constantan
SEEBECK
COEFFICIENT
(µV/°C)
58.5
50.2
39.4
38.0
R1, R2
66.5kΩ
76.8kΩ
97.6kΩ
102kΩ
FIGURE 7. Thermocouple Amplifier With Cold Junction
Compensation.
–
VIN RG INA118
+
Ref
R1
IO
=
VIN
R1
•G
IB
A1
OPA177
OPA602
OPA128
IB Error
±1.5nA
±1pA
±75fA
A1 IO
Load
FIGURE 8. Differential Voltage to Current Converter.
LA
RA
RL
390kΩ
390kΩ
1/2
OPA2604
10kΩ
1/2
OPA2604
2.8kΩ
RG/2
2.8kΩ
INA118
Ref
VO
G = 10
FIGURE 9. ECG Amplifier With Right-Leg Drive.
11
INA118
®
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet INA118.PDF ] | |
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