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PDF INA146 Data sheet ( Hoja de datos )
| Número de pieza | INA146 | |
| Descripción | High-Voltage/ Programmable Gain DIFFERENCE AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
INA146
INA146
For most current data sheet and other product
information, visit www.burr-brown.com
High-Voltage, Programmable Gain
DIFFERENCE AMPLIFIER
FEATURES
q HIGH COMMON-MODE VOLTAGE:
+40V at VS = +5V
±100V at VS = ±15V
q DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
Set with External Resistors
q LOW QUIESCENT CURRENT: 570µA
q WIDE SUPPLY RANGE:
Single Supply: 4.5V to 36V
Dual Supplies: ±2.25V to ±18V
q LOW GAIN ERROR: 0.025%
q HIGH CMR: 80dB
q SO-8 PACKAGE
APPLICATIONS
q CURRENT SHUNT MEASUREMENTS
q SENSOR AMPLIFIER
q SYNCHRONOUS DEMODULATOR
q CURRENT AND DIFFERENTIAL LINE
RECEIVER
q VOLTAGE-CONTROLLED CURRENT
SOURCE
q BATTERY POWERED SYSTEMS
q LOW COST AUTOMOTIVE
INSTRUMENTATION
V+
7
R1
100kΩ
VIN– 2
R2
10kΩ
G = 0.1
A1
R3
100kΩ
VIN+ 3
R4
10kΩ
4
V–
DESCRIPTION
The INA146 is a precision difference amplifier that
can be used to accurately attenuate high differential
voltages and reject high common-mode voltages for
compatibility with common signal processing voltage
levels. High-voltage capability also affords inherent
input protection. The input common-mode range ex-
tends beyond both supply rails, making the INA146
well-suited for both single and dual supply applica-
tions.
On-chip precision resistors are laser-trimmed to achieve
accurate gain and high common-mode rejection. Ex-
cellent TCR tracking of these resistors assures contin-
ued high precision over temperature.
A 10:1 difference amplifier provides 0.1V/V gain
when the output amplifier is used as a unity-gain
buffer. In this configuration, input voltages up to
±100V can be measured. Gains greater than 0.1V/V
can be set with an external resistor pair without affect-
ing the common-mode input range.
The INA146 is available in the SO-8 surface-mount
package specified for the extended industrial tempera-
ture range, –40°C to +85°C.
RG1
RG2
5
R5
10kΩ
(1%)
A2 6 VO
VO = (VI+N – VI–N) 0.1 (1 + RG2/RG1)
INA146
18
Ref V01
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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1999 Burr-Brown Corporation
PDS-11491A
INA146Printed in U.S.A. September, 1999
®
1 page  
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, G = 0.1, RL = 10kΩ connected to ground and Ref pin connected to ground, unless otherwise noted.
40
20
0
–20
–40
100
GAIN vs FREQUENCY
G = 10
VS = ±15V
CL = 1000pF
G=1
G = 0.1
1K
10K 100K
1M
10M
Frequency (Hz)
40
20
0
–20
–40
100
GAIN vs FREQUENCY
VS = ±15V
G = 10 CL = 200pF 10kΩ
G=1
G = 0.1
1K 10K 100K 1M 10M
Frequency (Hz)
COMMON-MODE REJECTION vs FREQUENCY
100
80
60
40
20
0
10 100 1k 10k 100k 1M 10M
Frequency (Hz)
POWER SUPPLY REJECTION vs FREQUENCY
100
PSR+
(VS = ±15V)
80
PSR+
60 (VS = +5V)
40
20
0
1
PSR–
(VS = ±15V)
10 100 1k 10k 100k
Frequency (Hz)
INPUT VOLTAGE NOISE DENSITY
10k
G = 0.1
1k
G = 10
G=1
100
0.1 1 10 100 1k 10k 100k
Frequency (Hz)
0.1Hz to 10Hz VOLTAGE NOISE (RTI)
500ms/div
®
5 INA146
5 Page 
For sense resistors (RS)
greater than 10Ω, use
series compensation
resistor (RC) for good
common-mode rejection.
Sense resistors greater
than 500Ω are not
recommended.
Power
Supply
RC
100Ω
RS
100Ω
2
3
Load
FIGURE 7. Current Monitor, G = 1.
RG1
11kΩ
RG2
100kΩ
5
VO
6
INA146
18
VO1
24V
2
SHUNT
R-I Lamp/10
e.g., 0.1Ω for 1A
3
Lamp
+5V
Feedback
8.4kΩ
75
VO
6
1V – 50mV
INA146
41
8
Ref 10MΩ
8kΩ
10kΩ
1V
2kΩ
FIGURE 8. Comparator Output with Optional Hysteresis Application to Sense Lamp Burn-Out.
VI–N 2
RG1
11kΩ
RG2
100kΩ
5
VO
VI+N 3
1
Pole at
f = 1 = 1.6Hz
2πR1RC
INA146
C1
0.1µF
R1
1MΩ
OPA277
VIN 2
VI+N 3
RG2
10kΩ
5
10kΩ
VO
6
INA146
1 8 VO1
IOUT – (VI+N – VI–N)/10kΩ
FIGURE 9. AC Coupling (DC Restoration).
FIGURE 10. Precision Current Source.
11 INA146
®
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet INA146.PDF ] | |
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