INA105KP [BB]
Precision Unity Gain DIFFERENTIAL AMPLIFIER; 精密单位增益差分放大器
| 型号： | INA105KP |
| 厂家： | 
BURR-BROWN CORPORATION |
| 描述： | Precision Unity Gain DIFFERENTIAL AMPLIFIER |
| 文件： | 总12页 (文件大小：184K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
INA105
Precision Unity Gain
DIFFERENTIAL AMPLIFIER
FEATURES
APPLICATIONS
● CMR 86dB min OVER TEMPERATURE
● DIFFERENTIAL AMPLIFIER
● GAIN ERROR: 0.01% max
● INSTRUMENTATION AMPLIFIER
BUILDING BLOCK
● NONLINEARITY: 0.001% max
● UNITY-GAIN INVERTING AMPLIFIER
● GAIN-OF-1/2 AMPLIFIER
● NO EXTERNAL ADJUSTMENTS
REQUIRED
● EASY TO USE
● NONINVERTING GAIN-OF-2 AMPLIFIER
● AVERAGE VALUE AMPLIFIER
● ABSOLUTE VALUE AMPLIFIER
● SUMMING AMPLIFIER
● COMPLETE SOLUTION
● HIGHLY VERSATILE
● LOW COST
● PLASTIC DIP, TO-99 HERMETIC METAL,
● SYNCHRONOUS DEMODULATOR
AND SO-8 SOIC PACKAGES
● CURRENT RECEIVER WITH COMPLIANCE
TO RAILS
● 4mA TO 20mA TRANSMITTER
● VOLTAGE-CONTROLLED CURRENT
SOURCE
● ALL-PASS FILTERS
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.
25kΩ
25kΩ
2
5
7
6
4
1
–In
Sense
V+
Output
V–
25kΩ
25kΩ
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.
3
+In
Ref
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
•
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
©1985 Burr-Brown Corporation
PDS-617G
Printed in U.S.A. August, 1993
SPECIFICATIONS
ELECTRICAL
At +25°C, VCC = ±15V, unless otherwise noted.
INA105AM
TYP
INA105BM
TYP
INA105KP, KU
TYP
PARAMETER
CONDITIONS
MIN
MAX
MIN
MAX
MIN
MAX
UNITS
GAIN
Initial(1)
Error
vs Temperature
Nonlinearity(2)
1
0.005
1
✻
✻
✻
✻
✻
0.01
✻
V/V
%
ppm/°C
%
0.01
5
0.001
✻
✻
✻
0.025
✻
✻
0.0002
✻
OUTPUT
Rated Voltage
Rated Current
Impedance
Current Limit
Capacitive Load
IO = +20mA, –5mA
O = 10V
10
+20, –5
12
✻
✻
✻
✻
✻
✻
V
mA
Ω
mA
pF
V
0.01
+40/–10
1000
✻
✻
✻
✻
✻
✻
To Common
Stable Operation
INPUT
Impedance(3)
Differential
Common-Mode
Differential
Common-Mode
TA = TMIN to TMAX
50
50
✻
✻
✻
✻
kΩ
kΩ
V
V
dB
Voltage Range(4)
±10
±20
80
✻
✻
86
✻
✻
72
Common-Mode Rejection(5)
90
100
✻
OFFSET VOLTAGE
Initial
vs Temperature
vs Supply
RTO(6), (7)
50
5
1
250
20
25
✻
5
✻
✻
✻
10
15
✻
✻
✻
✻
500
✻
✻
µV
µV/°C
µV/V
±VS = 6V to 18V
vs Time
20
µV/mo
OUTPUT NOISE VOLTAGE
RTO(6), (8)
fB = 0.01Hz to 10Hz
2.4
60
✻
✻
✻
✻
µVp-p
nV/√Hz
f
O = 10kHz
DYNAMIC RESPONSE
Small Signal Bandwidth
Full Power Bandwidth
Slew Rate
Settling Time: 0.1%
0.01%
–3dB
O = 20Vp-p
1
50
3
4
5
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
✻
MHz
kHz
V/µs
µs
µs
µs
V
30
2
✻
✻
✻
✻
V
V
O = 10V Step
O = 10V Step
CM = 10V Step, VDIFF = 0V
0.01%
V
1.5
POWER SUPPLY
Rated
Voltage Range
Quiescent Current
±15
✻
✻
✻
✻
V
V
mA
Derated Performance
±5
±18
±2
✻
✻
✻
✻
✻
✻
VO = 0V
±1.5
TEMPERATURE RANGE
Specification
Operation
–40
–55
–65
+85
+125
+150
✻
✻
✻
✻
✻
✻
✻
–40
–40
✻
+85
+125
°C
°C
°C
Storage
✻ Specification same as for INA105AM.
NOTES: (1) Connected as difference amplifier (see Figure 4). (2) Nonlinearity is the maximum peak deviation from the best-fit straight line as a percent of full-scale peak-
to-peak output. (3) 25kΩ resistors are ratio matched but have ±20% absolute value. (4) Maximum input voltage without protection is 10V more than either ±15V supply
(±25V). Limit IIN to 1mA. (5) With zero source impedance (see “Maintaining CMR” section). (6) Referred to output in unity-gain difference configuration. Note that this
circuit has a gain of 2 for the operational amplifier’s offset voltage and noise voltage. (7) Includes effects of amplifier’s input bias and offset currents. (8) Includes effects
of amplifier’s input current noise and thermal noise contribution of resistor network.
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.
®
2
INA105
PIN CONFIGURATIONS
Top View
TO-99
Top View
DIP/SOIC
Tab
8
No Internal
Connection
Ref
1
V+
7
1
2
3
4
No Internal Connection
Ref
–In
+In
V–
8
7
6
5
(1)
V+
–In
2
6
Output
Output
Sense
3
5
Sense
+In
4
INA105AM
INA105BM
V–
NOTE: (1) Performance grade identifier box for small outline surface mount.
Blank indicates K grade. Part is marked INA105U.
Case internally connected to V–. Make no connection.
ABSOLUTE MAXIMUM RATINGS
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
Supply ................................................................................................ ±18V
Input Voltage Range ............................................................................ ±VS
Operating Temperature Range: M .................................. –55°C to +125°C
P, U ................................ –40°C to +85°C
Storage Temperature Range: M ..................................... –65°C to +150°C
P, U ................................. –40°C to +125°C
Lead Temperature (soldering, 10s) M, P ....................................... +300°C
Wave Soldering (3s, max) U .......................................................... +260°C
Output Short Circuit to Common .............................................. Continuous
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.
PACKAGE/ORDERING INFORMATION
PACKAGE
DRAWING TEMPERATURE
PRODUCT
PACKAGE
NUMBER(1)
RANGE
INA105AM
INA105BM
INA105KP
INA105KU
TO-99 Metal
TO-99 Metal
8-Pin Plastic DIP
8-Pin SOIC
001
001
006
182
–40°C to +85°C
–40°C to +85°C
–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.
®
3
INA105
TYPICAL PERFORMANCE CURVES
At TA = 25°C, VS = ±15V, unless otherwise noted.
SMALL SIGNAL RESPONSE
(No Load)
STEP RESPONSE
+50
0
–50
0
5
10
0
4
8
12
16
Time (µs)
Time (µs)
MAXIMUM VOUT vs IOUT
(Negative Swing)
SMALL SIGNAL RESPONSE
(RLOAD =∞Ω, CLOAD = 1000pF)
–17.5
–15
–12.5
–10
–7.5
–5
VS = ±18V
+50
0
VS = ±15V
VS = ±12V
–50
VS = ±5V
–4
–2.5
0
0
5
10
0
–2
–6
–IOUT (mA)
–8
–10
–12
Time (µs)
MAXIMUM VOUT vs IOUT
(Positive Swing)
CMR vs FREQUENCY
110
100
90
17.5
15
VS = ±18V
VS = ±15V
BM
12.5
10
AM, KP, U
VS = ±12V
7.5
5
80
VS = ±5V
70
2.5
0
60
10
100
1k
10k
100k
0
6
12
18
24
30
36
Frequency (Hz)
I
OUT (mA)
®
4
INA105
TYPICAL PERFORMANCE CURVES (CONT)
At TA = 25°C, VS = ±15V, unless otherwise noted.
POWER SUPPLY REJECTION
vs FREQUENCY
COMMON-MODE INPUT RANGE vs SUPPLY
(Difference Amplifier Connected, VOUT = 0)
140
120
100
80
36
30
24
18
12
6
Negative CMV
Positive CMV
V–
60
V+
40
0
1
10
100
1k
10k
100k
±3
±6
±9
±12
±15
±18
±21
Frequency (Hz)
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.
1µF
1µF
4
7
INA105
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.
R1
R2
2
5
6
V2
25k
25k
Ω
Ω
Ω
R3
3
V3
VOUT = V3 – V2
25k
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.
R4
25k
Ω
1
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.
FIGURE 1. Basic Power Supply and Signal Connections.
®
5
INA105
V1
INA105
INA105
–In
A1
R1
R2
2
5
6
V2
2
5
6
1
R2
VO
R1
V0
0utput
R2
10
R3
Ω
3
V3
3
R4
A2
+15V
V1
+In
1
VO = V3 – V3
Offset Adjustment
Range = ±300µV
499k
Ω
VO = (1 + 2R2/R1) (V2 –V1)
100k
Ω
For low source impedance applications, an input stage using OPA27 op
amps will give the best low noise, offset, and temperature drift performance.
At source impedances above about 10kΩ, the bias current noise of the
OPA27 reacting with the input impedance begins to dominate the noise
performance. For these applications, using the OPA111 or dual OPA2111
FET input op amp will provide lower noise performance. For lower cost use
the OPA121 plastic. To construct an electrometer use the OPA128.
10
Ω
–15V
FIGURE 2. Offset Adjustment.
R1
R2
GAIN CMRR MAX NOISE AT 1kHz
INA105BM
R2
A1, A2
(Ω)
(Ω) (V/V)
(dB)
IB
(nV/√HZ)
OPA27A
OPA111B
OPA128LM 202
50.5 2.5k 100
202
128
110
118
40nA
1pA
75fA
4
10
38
R1
25k
–In
V2
10k
10k
100
100
2
5
6
1
25k
Ω
Ω
FIGURE 4. Precision Instrumentation Amplifier.
V0
R3
25k
R4
+In
V3
3
INA105
25k
Ω
Ω
2
5
6
1
V
0 = V3 – V2
100
1%
Ω
Gain Error = 0.005%
CMR = 100dB
Nonlinearity = 0.0002%
V–
V0
0 to 2V
100
1%
Ω
3
FIGURE 3. Precision Difference Amplifier.
IIN
0 to 20mA
FIGURE 5. Current Receiver with Compliance to Rails.
®
6
INA105
INA105
INA105
2
5
2
5
6
V2
V0
6
V0
1
3
V1
V
0 = V1
Gain Error = 0.001% maximum
1
3
V0 = – V2
FIGURE 9. Precision Unity-Gain Buffer.
Gain Error = 0.01% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 2ppm/°C
V+
V+
3
FIGURE 6. Precision Unity-Gain Inverting Amplifier.
INA105
2
+15V
2
5
7
6
+10V Out
6
REF10
INA105
(V+)/2
–10V Out
2
5
6
4
1
3
1
4
Common
Common
FIGURE 10. Pseudoground Generator.
FIGURE 7. ±10V Precision Voltage Reference.
INA105
2
5
V+
2
6
REF10
6
+5V Out
–5V Out
V0
2
1
V1
INA105
4
V3
3
5
V
0 = (V1 + V3)/2, ±0.01% maximum
6
FIGURE 11. Precision Average Value Amplifier.
1
3
FIGURE 8. ±5V Precision Voltage Reference.
®
7
INA105
INA105
INA105
0 to +10V Output
±2ppm/°C
2
5
2
5
6
V0
Output
6
1
3
(1)
1
V1
–10V
to
+10V
Input
3
Device
VFC320 0-10kHz
VFC100 0-FCLOCK/2
DAC80 0-FS (12 bits)
DAC703 0-FS (16 bits)
XTR110 4-20mA
Output
V0 = 2 • V1
Gain Error = 0.01% maximum
Gain Drift = 2ppm/°C
2
FIGURE 12. Precision (G = 2) Amplifier.
6
REF10
10V
INA105
4
NOTE: (1) Unipolar Input Device.
2
5
FIGURE 15. Precision Bipolar Offsetting.
6
V0
1
V1
V3
3
R1
R2
2
5
INA105
V0 = V1 + V3, ±0.01% maximum
FIGURE 13. Precision Summing Amplifier.
6
V0
1
3
V1
V3
INA105
For G=10,
See INA106.
2
)( V + V
)
R2
R1
1
3
V0
=
(
1 +
2
5
6
FIGURE 16. Precision Summing Amplifier with Gain.
V0
= 1/2 V3
3
V3
±20V
1
V0 = V3/2, ±0.01%
FIGURE 14. Precision Gain = 1/2 Amplifier.
®
8
INA105
Offset
Adjust
6
7
8
Noise (60Hz hum)
INA101AG
3
4
A1
Transducer or
Analog Signal
10kΩ
5
20kΩ
20kΩ
10kΩ
10kΩ
A3
RG
Output
1
10
11
12
A2
10kΩ
Noise (60Hz hum)
100k
Ω
Shield
2
13
9
14 Common
+VCC –VCC
3
INA105
2
5
6
1
FIGURE 17. Instrumentation Amplifier Guard Drive Generator.
INA105
2
5
6
INA105
2
5
6
3
1
V1
V2
V0
3
1
V3
V4
V
0 = V3 + V4 – V1 – V2
FIGURE 18. Precision Summing Instrumentation Amplifier.
®
9
INA105
INA105
INA105
2
5
6
1
V2
R
R
2
5
6
1
V1
V01
3
V1
3
IO = (V1 – V2) (1/25k + 1/R)
For R 200Ω, Figure 24 will
provide superior performance.
Load
IO
V2
FIGURE 19. Precision Voltage-to-Current Converter with
Differential Inputs.
INA105
2
5
6
1
INA105
V02
2
5
6
V2
3
R
V01 – V02 = 2 (V2 – V1)
3
V3
1
FIGURE 22. Differential Output Difference Amplifier.
IO = (V3 – V2)/R
IO
Load
INA105
2
5
6
1
V2
FIGURE20. DifferentialInputVoltage-to-CurrentConverter
for Low IOUT
.
R ≥200Ω
R
3
V3
Gate can be
+VCC –5V
INA105
2
5
6
1
V2
IO = (V3 – V2)/R
R
R
Load
IO
R < 200Ω
Gate can be
+VS –5V
3
FIGURE 23. Isolating Current Source with Buffering Ampli-
fier for Greater Accuracy.
V3
IO = (V3 – V2) (1/25k + 1/R)
Load
IO
FIGURE 21. Isolating Current Source.
®
10
INA105
Window Center–Window Span
2
5
6
Window Span
0 to +5V
1
3
5
3
2
10
9
INA105
Lower Limit
VIN
HI
4115
Window
Comparator
2
GO
LO
7
Upper Limit
5
Window
Center
±10V
8
6
3
1
INA105
Window Center + Window Span
FIGURE 24. Window Comparator with Window Span and Window Center Inputs.
–In
V1
(1)
INA105
V+
R2
2
3
5
R
R
R1
6
1
R2
1kΩ
(1)
+In
V2
Load IO
I
O = (E2 – E1) (1 +2R2/R1) (1/25k + 1/R)
NOTE: (1) See Figure 5 for op amp recommendation.
FIGURE 25. Precision Voltage-Controlled Current Source with Buffered Differential Inputs and Gain.
INA105
2
5
6
V1
VO
DG188
3
1
Logic In
VO
–V1
+V1
1
0
1
Logic
In
FIGURE 26. Digitally Controlled Gain of ±1 Amplifier.
®
11
INA105
INA105
R2
R2
2
5
V1
A
1
R1
49.5Ω
6
V0 = 200 (V2 – V1)
1
3
A3
R1
R1
49.5Ω
R2
R2
A2
V2
Conventional
INA105
A = 2
Instrumentation
Amplifier (e.g., INA101 or INA102)
A = 100
FIGURE 27. Boosting Instrumentation Amplifier Common-Mode Range From ±5 to ±7.5V with 10V Full-Scale Output.
INA105
R1
R2
2
5
6
10pF
D1
R3
R4
V0 = |V1|
3
1
D2
OPA111
V1
Input
R5
2kΩ
FIGURE 28. Precision Absolute Value Buffer.
12.5k
1k
Ω
Ω
0 to 10V
In
50k
Ω
INA105
2
5
6
1
OPA27
+15V
2
50.1
Ω
6
10V
REF10
50.1
Ω
3
4
RLOAD
4 to 20mA
Out
FIGURE 29. Precision 4-20mA Current Transmitter.
®
12
INA105
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