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PDF INA105KP Data sheet ( Hoja de datos )
| Número de pieza | INA105KP | |
| Descripción | Precision Unity Gain DIFFERENTIAL AMPLIFIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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® INA105
Precision Unity Gain
DIFFERENTIAL AMPLIFIER
FEATURES
q CMR 86dB min OVER TEMPERATURE
q GAIN ERROR: 0.01% max
q NONLINEARITY: 0.001% max
q NO EXTERNAL ADJUSTMENTS
REQUIRED
q EASY TO USE
q COMPLETE SOLUTION
q HIGHLY VERSATILE
q LOW COST
q PLASTIC DIP, TO-99 HERMETIC METAL,
AND SO-8 SOIC PACKAGES
DESCRIPTION
The INA105 is a monolithic Gain = 1 differential
amplifier consisting of a precision op amp and on-chip
metal film resistors. The resistors are laser trimmed
for accurate gain and high common-mode rejection.
Excellent TCR tracking of the resistors maintains
gain accuracy and common-mode rejection over
temperature.
The differential amplifier is the foundation of many
commonly used circuits. The INA105 provides this
precision circuit function without using an expensive
precision resistor network. The INA105 is available in
8-pin plastic DIP, SO-8 surface-mount and TO-99
metal packages.
APPLICATIONS
q DIFFERENTIAL AMPLIFIER
q INSTRUMENTATION AMPLIFIER
BUILDING BLOCK
q UNITY-GAIN INVERTING AMPLIFIER
q GAIN-OF-1/2 AMPLIFIER
q NONINVERTING GAIN-OF-2 AMPLIFIER
q AVERAGE VALUE AMPLIFIER
q ABSOLUTE VALUE AMPLIFIER
q SUMMING AMPLIFIER
q SYNCHRONOUS DEMODULATOR
q CURRENT RECEIVER WITH COMPLIANCE
TO RAILS
q 4mA TO 20mA TRANSMITTER
q VOLTAGE-CONTROLLED CURRENT
SOURCE
q ALL-PASS FILTERS
–In 2
25kΩ
+In 3
25kΩ
25kΩ
25kΩ
5 Sense
7 V+
6 Output
4 V–
1 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
©1985 Burr-Brown Corporation
PDS-617G
Printed in U.S.A. August, 1993
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = 25°C, VS = ±15V, unless otherwise noted.
140
120
100
80
60
40
1
POWER SUPPLY REJECTION
vs FREQUENCY
V–
V+
10 100 1k 10k 100k
Frequency (Hz)
COMMON-MODE INPUT RANGE vs SUPPLY
(Difference Amplifier Connected, VOUT = 0)
36
30
24
Negative CMV
18
Positive CMV
12
6
0
±3 ±6 ±9 ±12 ±15 ±18 ±21
Supply Voltage (V)
APPLICATION INFORMATION
V– V+
Figure 1 shows the basic connections required for operation
of the INA105. Power supply bypass capacitors should be
connected close to the device pins.
The differential input signal is connected to pins 2 and 3 as
shown. The source impedances connected to the inputs must
be nearly equal to assure good common-mode rejection. A
5Ω mismatch in source impedance will degrade the com-
mon-mode rejection of a typical device to approximately
80dB. If the source has a known mismatch in source imped-
ance, an additional resistor in series with one input can be
used to preserve good common-mode rejection.
The output is referred to the output reference terminal (pin
1) which is normally grounded. A voltage applied to the Ref
terminal will be summed with the output signal. This can be
used to null offset voltage as shown in Figure 2. The source
impedance of a signal applied to the Ref terminal should be
less than 10Ω to maintain good common-mode rejection.
Do not interchange pins 1 and 3 or pins 2 and 5, even though
nominal resistor values are equal. These resistors are laser
trimmed for precise resistor ratios to achieve accurate gain
and highest CMR. Interchanging these pins would not pro-
vide specified performance.
1µF 1µF
2
V2
47
INA105
R1 R2
25kΩ
25kΩ
3
V3
R3
25kΩ
5
6
R4
25kΩ
VOUT = V3 – V2
1
FIGURE 1. Basic Power Supply and Signal Connections.
®
5 INA105
5 Page 
2
Window Span
0 to +5V
Window Center–Window Span
5
6
3
Window
Center
±10V
1
INA105
2
3
Lower Limit
VIN
5 Upper Limit
6
5 10
3
4115
Window
9
2 Comparator 7
HI
GO
LO
8
1 INA105
FIGURE 24. Window Comparator with Window Span and Window Center Inputs.
–In
V1
(1)
INA105
R2
2
5
Window Center + Window Span
V+
R1
R2
3
+In
V2
(1)
IO = (E2 – E1) (1 +2R2/R1) (1/25k + 1/R)
NOTE: (1) See Figure 5 for op amp recommendation.
6R
1kΩ
1
R
Load IO
FIGURE 25. Precision Voltage-Controlled Current Source with Buffered Differential Inputs and Gain.
INA105
2
V1
DG188
3
5
6 VO
1
Logic
In
1
FIGURE 26. Digitally Controlled Gain of ±1 Amplifier.
11
Logic In
0
1
VO
–V1
+V1
INA105
®
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet INA105KP.PDF ] | |
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