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PDF INA114AP Data sheet ( Hoja de datos )
| Número de pieza | INA114AP | |
| Descripción | Precision INSTRUMENTATION AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de INA114AP (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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® INA114
INA114
INA114
Precision
INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 50µV max
q LOW DRIFT: 0.25µV/°C max
q LOW INPUT BIAS CURRENT: 2nA max
q HIGH COMMON-MODE REJECTION:
115dB min
q INPUT OVER-VOLTAGE PROTECTION:
±40V
q WIDE SUPPLY RANGE: ±2.25 to ±18V
q LOW QUIESCENT CURRENT: 3mA max
q 8-PIN PLASTIC AND SOL-16
APPLICATIONS
q BRIDGE AMPLIFIER
q THERMOCOUPLE AMPLIFIER
q RTD SENSOR AMPLIFIER
q MEDICAL INSTRUMENTATION
q DATA ACQUISITION
– 2 Over-Voltage
VIN (4)
Protection
1
(2)
RG
8
(15)
+ 3 Over-Voltage
VIN (5)
Protection
A1
25kΩ
25kΩ
A2
DIP
DESCRIPTION
The INA114 is a low cost, general purpose instrumen-
tation amplifier offering excellent accuracy. Its versa-
tile 3-op amp design and small size make it ideal for a
wide range of applications.
A single external resistor sets any gain from 1 to 10,000.
Internal input protection can withstand up to ±40V
without damage.
The INA114 is laser trimmed for very low offset voltage
(50µV), drift (0.25µV/°C) and high common-mode
rejection (115dB at G = 1000). It operates with power
supplies as low as ±2.25V, allowing use in battery
operated and single 5V supply systems. Quiescent cur-
rent is 3mA maximum.
The INA114 is available in 8-pin plastic and SOL-16
surface-mount packages. Both are specified for the
–40°C to +85°C temperature range.
V+
7 (13)
INA114
25kΩ
25kΩ
A3
25kΩ
25kΩ
4 (7)
V–
(SOIC)
Feedback
(12)
DIP Connected
Internally
6
(11) VO
5
Ref
(10)
G = 1 + 50kΩ
RG
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-11142D
INA114Printed in U.S.A. March, 1998
®
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±15V, unless otherwise noted.
1200
1000
800
600
400
200
0
1
SETTLING TIME vs GAIN
0.01%
0.1%
10 100
Gain (V/V)
1000
6
4
2
0
–2
–4
–6
0
OFFSET VOLTAGE WARM-UP vs TIME
G ≥ 100
15 30 45 60 75 90 105 120
Time from Power Supply Turn-on (s)
INPUT BIAS AND INPUT OFFSET CURRENT
vs TEMPERATURE
2
1
±IB
0
IOS
–1
–2
–40
–15 10
35
Temperature (°C)
60
85
INPUT BIAS CURRENT
vs DIFFERENTIAL INPUT VOLTAGE
3
2
1
0
–1 G = 1
–2
–3
–45
G = 10
G = 100
G = 1000
–30 –15
0
15 30
Differential Overload Voltage (V)
45
INPUT BIAS CURRENT
vs COMMON-MODE INPUT VOLTAGE
3
Both Inputs
2 |Ib1| + |Ib2|
One Input
1
0
Over-Voltage
Protection
–1
Normal
Operation
Over-Voltage
Protection
–2 One Input
–3
–45
Both Inputs
–30 –15
0
15
Common-Mode Voltage (V)
30
45
32
28
24
20
16
12
8
4
0
10
MAXIMUM OUTPUT SWING vs FREQUENCY
G = 1, 10
G = 100
G = 1000
100 1k 10k 100k
Frequency (Hz)
1M
®
5 INA114
5 Page 
V+ V+
Equal line resistance here creates
a small common-mode voltage
which is rejected by INA114.
1
REF200
100µA
RTD
2
3
RZ
Resistance in this line causes
a small common-mode voltage
which is rejected by INA114.
FIGURE 8. RTD Temperature Measurement Circuit.
RG INA114
Ref
VO
VO = 0V at RRTD = RZ
V+
2
R1
27k Ω
10.0V 6
REF102
R4
80.6k Ω
4
1N4148
(1)
Cu
R2
5.23k Ω
(2)
R7
1MΩ
K
Cu
INA114
Ref
VO
R3
100Ω
R5
50Ω
R6
100Ω
Zero Adj
ISA
TYPE
E
J
K
T
MATERIAL
Chromel
Constantan
Iron
Constantan
Chromel
Alumel
Copper
Constantan
SEEBECK
COEFFICIENT
(µV/°C)
58.5
R2
(R3 = 100Ω)
3.48kΩ
50.2 4.12kΩ
39.4 5.23kΩ
38.0 5.49kΩ
R4
(R5 + R6 = 100Ω)
56.2kΩ
64.9kΩ
80.6kΩ
84.5kΩ
NOTES: (1) –2.1mV/°C at 200µA. (2) R7 provides down-scale burn-out indication.
FIGURE 9. Thermocouple Amplifier With Cold Junction Compensation.
11 INA114
®
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet INA114AP.PDF ] | |
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