INA115.pdf 데이터시트 (총 11 페이지) - 파일 다운로드 INA115 데이타시트 다운로드

No Preview Available !

®
INA115
INA115
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 SOL-16 SURFACE-MOUNT PACKAGE
APPLICATIONS
q SWITCHED-GAIN AMPLIFIER
q BRIDGE AMPLIFIER
q THERMOCOUPLE AMPLIFIER
q RTD SENSOR AMPLIFIER
q MEDICAL INSTRUMENTATION
q DATA ACQUISITION
DESCRIPTION
The INA115 is a low cost, general purpose instrumen-
tation amplifier offering excellent accuracy. Its versa-
tile three-op amp design and small size make it ideal
for a wide range of applications. Similar to the model
INA114, the INA115 provides additional connections
to the input op amps, A1 and A2, which improve gain
accuracy in high gains and are useful in forming
switched-gain amplifiers.
A single external resistor sets any gain from 1 to
10,000. Internal input protection can withstand up to
±40V without damage.
The INA115 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. Quies-
cent current is 3mA maximum.
The INA115 is available in the SOL-16 surface-mount
package, specified for the –40°C to +85°C tempera-
ture range.
VO1 V+
1 13
4 Over-Voltage
VIN Protection
2
3
A1
25k
INA115
25k
25k
Feedback
12
RG
14
15
+5
VIN
Over-Voltage
Protection
25k
A2
25k
A3
25k
11 VO
Ref
10
G = 1 + 50k
RG
87
VO2 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-1169B
Printed in U.S.A. October, 1993

No Preview Available !

SPECIFICATIONS
ELECTRICAL
At TA = +25°C, VS = ±15V, RL = 2kunless otherwise noted.
INA115BU
INA115AU
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
Offset Voltage, RTI
Initial
vs Temperature
vs Power Supply
Long-Term Stability
TA = +25°C
TA = TMIN to TMAX
VS = ±2.25V to ±18V
±10 + 20/G
±0.1 + 0.5/G
0.5 + 2/G
±0.2 + 0.5/G
±50 + 100/G
±0.25 + 5/G
3 + 10/G
±25 + 30/G
±0.25 + 5/G
T
T
±125 + 500/G
±1 + 10/G
T
µV
µV/°C
µV/V
µV/mo
Impedance, Differential
Common-Mode
1010 || 6
1010 || 6
T || pF
T || pF
Input Common-Mode Range
±11 ±13.5
TT
V
Safe Input Voltage
±40 T V
Common-Mode Rejection
VCM = ±10V, RS = 1k
G=1
80
96
75 90
dB
G = 10
96 115
90 106
dB
G = 100
110 120
106 110
dB
G = 1000
115 120
106 110
dB
BIAS CURRENT
vs Temperature
±0.5
±8
±2
T ±5 nA
T pA/°C
OFFSET CURRENT
vs Temperature
±0.5
±8
±2
T ±5 nA
T pA/°C
NOISE VOLTAGE, RTI
f = 10Hz
f = 100Hz
f = 1kHz
fB = 0.1Hz to 10Hz
Noise Current
f=10Hz
f=1kHz
fB = 0.1Hz to 10Hz
GAIN
Gain Equation
Range of Gain
Gain Error
Gain vs Temperature
50kResistance(1)
Nonlinearity
G = 1000, RS = 0
G=1
G = 10
G = 100
G = 1000
G=1
G=1
G = 10
G = 100
G = 1000
15
11
11
0.4
0.4
0.2
18
1 + (50k/RG)
1 10000
±0.01
±0.05
±0.02
±0.4
±0.05
±0.5
±0.5
±1
±2 ±10
±25 ±100
±0.0001
±0.001
±0.0005
±0.002
±0.0005
±0.002
±0.002
±0.01
T
T nV/Hz
T nV/Hz
T nV/Hz
T µVp-p
T pA/Hz
T pA/Hz
T pAp-p
T V/V
T V/V
T T%
T ±0.5 %
T ±0.7 %
T ±2 %
T ±10 ppm/°C
T T ppm/°C
T
±0.002
% of FSR
T
±0.004
% of FSR
T
±0.004
% of FSR
T
±0.02
% of FSR
OUTPUT(2)
Voltage
Load Capacitance Stability
Short Circuit Current
IO = 5mA, TMIN to TMAX
VS = ±11.4V, RL = 2k
VS = ±2.25V, RL = 2k
±13.5
±10
±1
±13.7
±10.5
±1.5
1000
+20/–15
TT
TT
TT
T
T
V
V
V
pF
mA
FREQUENCY RESPONSE
Bandwidth, –3dB
Slew Rate
Settling Time, 0.01%
Overload Recovery
G=1
G = 10
G = 100
G = 1000
VO = ±10V, G = 10
G=1
G = 10
G = 100
G = 1000
50% Overdrive
0.3
1
100
10
1
0.6
18
20
120
1100
20
T
T
T
T
TT
T
T
T
T
T
MHz
kHz
kHz
kHz
V/µs
µs
µs
µs
µs
µs
POWER SUPPLY
Voltage Range
Current
TEMPERATURE RANGE
Specification
Operating
θJA
VIN = 0V
±2.25
–40
–40
±15
±2.2
80
±18
±3
+85
+125
T
T
T
T
T
T
TV
T mA
T °C
T °C
°C/W
T Specification same as INA115BU.
NOTE: (1) Temperature coefficient of the “50k” term in the gain equation. (2) Output specifications are for output amplifier, A3. A1 and A2 provide the same output
voltage swing but have less output current drive. A1 and A2 can drive external loads of 25k|| 200pF.
®
INA115
2

No Preview Available !

PIN CONFIGURATIONS
U Package
VO1 1
Gain Sense1 2
RG
V–IN
V+IN
3
4
5
NC 6
V– 7
VO2 8
SOL-16 Surface-Mount
Top View
16 NC
15 Gain Sense2
14 RG
13 V+
12 Feedback
11 VO
10 Ref
9 NC
PACKAGE/ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
DRAWING TEMPERATURE
NUMBER(1)
RANGE
INA115AU
INA115BU
SOL-16 Surface-Mount
SOL-16 Surface-Mount
211
211
–40°C to +85°C
–40°C to +85°C
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .................................................................................. ±18V
Input Voltage Range .......................................................................... ±40V
Output Short-Circuit (to ground) .............................................. Continuous
Operating Temperature ................................................. –40°C to +125°C
Storage Temperature ..................................................... –40°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
3 INA115

No Preview Available !

TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, unless otherwise noted.
GAIN vs FREQUENCY
1k
100
10
1
10
VO1 connected to Gain Sense1 and
VO2 connected to Gain Sense2 . See text.
100
1k
10k 100k
1M
Frequency (Hz)
COMMON-MODE REJECTION vs FREQUENCY
140
G = 100, 1k
120
G = 10
100
G = 1k
80 G = 100
60
G = 10
40
G=1
20
0
10
100
1k
10k 100k
1M
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE RANGE
vs OUTPUT VOLTAGE
15
10 +LiOmuittepdutbSy wAi1ng
5
VD/2
VD/2
+
+
+ OLiumtpiteudt SbwyiAn2g
VO
0 VCM
(Any Gain)
–5 A3 – Output
Swing Limit
–10 – OLiumtpituetdSbwyinAg2
–15
–15 –10
–5
0
A3 + Output
Swing Limit
L–imOiutetpdubt ySwAi1ng
5 10
Output Voltage (V)
15
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
10k 100k
1M
Frequency (Hz)
140
120
100
80
60
40
20
0
10
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
G = 1000
G = 100
G = 10
G=1
100
1k
10k 100k
1M
Frequency (Hz)
INPUT- REFERRED NOISE VOLTAGE
vs FREQUENCY
1k
100
10
1
1
G=1
G = 100, 1000
G = 10
G = 1000
BW Limit
10 100 1k
Frequency (Hz)
10k
®
INA115
4

No Preview Available !

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 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
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
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 INA115