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PDF INA148 Data sheet ( Hoja de datos )
| Número de pieza | INA148 | |
| Descripción | 200V Common-Mode Voltage DIFFERENCE AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
INA148
INA148
For most current data sheet and other product
information, visit www.burr-brown.com
±200V Common-Mode Voltage
DIFFERENCE AMPLIFIER
FEATURES
q HIGH COMMON-MODE VOLTAGE:
+75V at VS = +5V
±200V at VS = ±15V
q FIXED DIFFERENTIAL GAIN = 1V/V
q LOW QUIESCENT CURRENT: 260µA
q WIDE SUPPLY RANGE:
Single Supply: 2.7V to 36V
Dual Supplies: ±1.35V to ±18V
q LOW GAIN ERROR: 0.075% max
q LOW NONLINEARITY: 0.002% max
q HIGH CMR: 86dB
q SO-8 PACKAGE
APPLICATIONS
q CURRENT SHUNT MEASUREMENTS
q DIFFERENTIAL SENSOR AMPLIFIERS
q LINE RECEIVERS
q BATTERY POWERED SYSTEMS
q AUTOMOTIVE INSTRUMENTATION
q STACKED CELL MONITORS
DESCRIPTION
The INA148 is a precision, low-power, unity-gain
difference amplifier with a high common-mode input
voltage range. It consists of a monolithic precision
bipolar op amp with a thin-film resistor network.
The on-chip resistors are laser trimmed for an accu-
rate 1V/V differential gain and high common-mode
rejection. Excellent temperature tracking of the resis-
tor network maintains high gain accuracy and com-
mon-mode rejection over temperature. The INA148
will operate on single or dual supplies.
The INA148 is available in a small SO-8 surface-
mount package and it is specified for the –40°C to
+85°C extended industrial temperature range.
VI–N 2
1MΩ
50kΩ
A1
50kΩ
2.7778kΩ
6
VO
VI+N 3
1MΩ
52.6316kΩ
74
V+ V–
1
Ref
INA148
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-1579A
Printed in U.S.A.December, 1999
1 page  
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±15V, RL = 10kΩ to common, and VREF = 0V, unless otherwise noted.
5
0
–5
–10
–20
–25
–30
–35
10
GAIN vs FREQUENCY
VS= ±1.35V
VS = ±15V
100 1k 10k 100k 1M
Frequency (Hz)
COMMON-MODE REJECTION vs FREQUENCY
100
= VS = ±15V
= VS = ±1.35V
80
60
40
20
0
10
100 1k 10k 100k 1M
Frequency (Hz)
110
100
90
80
70
60
50
40
30
20
10
1
POWER SUPPLY REJECTION vs FREQUENCY
PSR+
(VS = ±18V)
PSR–
(VS = ±18V)
PSR+
(VS = ±1.35V)
PSR–
(VS = ±1.35V)
10 100 1k
10k
Frequency (Hz)
100K
VOLTAGE NOISE (RTI)
0.1Hz to 10Hz
1s/div
INPUT VOLTAGE NOISE SPECTRAL DENSITY
1k
800
600
400
200
100
10
100 1k 10k
Frequency (Hz)
100k
QUIESCENT CURRENT vs TEMPERATURE
290
280
VS = ±15V
270
260
250
VS = ±2.5V
240
230
220
210
–60 –40 –20
0 20 40 60 80 100 120 140
Temperature (°C)
®
5 INA148
5 Page 
+VS
7
VI–N 2 1MΩ
50kΩ
A1
fC ≅ 0.75 Hz HPF
U1
50kΩ
2.7778kΩ
6
VO = (VI+N – VI–N) + VREF
VO
1MΩ
VI+N 3
4
–VS
52.6316kΩ
U2:
OPA132 for VS = ±5V to ±15V
OPA340 for VS = ±2.5
FIGURE 6. Quasi-AC-Coupled Differential Amplifier.
INA148
1 0.22µF
+VS
7
6
U2 4
–VS
2
3
1MΩ
VREF
+5V 0.1µF
VI–N 2 1MΩ
7
50kΩ
VCM = –23V to +56V
A1
50kΩ
2.7778kΩ
VO = (VI+N – VI–N) + 1.235V
6
VO
1MΩ
VI+N 3
52.6316kΩ
INA148
4 1 5Ω
+
10µF
34kΩ
+5V
REF1004-1.2
FIGURE 7. Single-Supply Differential Amplifier.
IC RS
0.01Ω
0.1µF
7
2 1MΩ
50kΩ
50kΩ
+ 28V
Supply
–
2.7778kΩ
6 VO = 1.235V + (IC • RS)
A1
3 1MΩ
4
52.6316kΩ
INA148
1 5Ω
+
10µF
271kΩ
REF1004-1.2
FIGURE 8. Battery Monitor Circuit.
11
INA148
®
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet INA148.PDF ] | |
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