BB INA154U

®
INA
INA154
154
For most current data sheet and other product
information, visit www.burr-brown.com
High-Speed, Precision
DIFFERENCE AMPLIFIER (G = 1)
FEATURES
APPLICATIONS
● DESIGNED FOR LOW COST
● DIFFERENTIAL INPUT AMPLIFIER
● LOW OFFSET VOLTAGE: ±750µV max
● LOW OFFSET DRIFT: ±2µV°C
● INSTRUMENTATION AMPLIFIER
BUILDING BLOCK
● UNITY-GAIN INVERTING AMPLIFIER
● LOW GAIN ERROR: ±0.05% max
● WIDE BANDWIDTH: 3MHz
● SUMMING AMPLIFIER
● DIFFERENTIAL CURRENT RECEIVER
● HIGH SLEW RATE: 14V/µs
● FAST SETTLING TIME: 3µs to 0.01%
● VOLTAGE-CONTROLLED CURRENT SOURCE
● SYNCHRONOUS DEMODULATOR
● WIDE SUPPLY RANGE: ±4V to ±18V
● LOW QUIESCENT CURRENT: 2.4mA
● SO-8 SURFACE-MOUNT PACKAGE
DESCRIPTION
V+
The INA154 is a high slew rate, unity-gain difference
amplifier consisting of a precision op amp with a
precision resistor network. The on-chip resistors are
laser trimmed for accurate gain and high commonmode rejection. Excellent TCR tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. The input common-mode
voltage range extends beyond the positive and negative supply rails. It operates on ±4V to ±18V supplies.
The difference amplifier is the foundation of many
commonly used circuits. The INA154 provides this
circuit function without using an expensive precision
resistor network. The INA154 is available in a SO-8
surface-mount package and is specified for operation
over the extended industrial temperature range, –40°C
to +85°C.
7
–In
2
25kΩ
25kΩ
5
6
+In
3
25kΩ
25kΩ
Sense
Output
1
Ref
4
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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1999 Burr-Brown Corporation
PDS-1482B
Printed in U.S.A. March, 1999
SPECIFICATIONS: VS = ±15V
At TA = +25°C, VS = ±15V, RL = 2kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
INA154U
PARAMETER
CONDITIONS
VOLTAGE(1)
OFFSET
Initial
vs Temperature
vs Power Supply
vs Time
MIN
OUTPUT VOLTAGE NOISE(3)
f = 0.1Hz to 10Hz
f = 1kHz
GAIN
Initial
Error
vs Temperature
Nonlinearity
VS = ±4V to ±18V
VCM
VO = 0V
VO = 0V
= –25V to 25V, RS = 0Ω
✽
✽
74
2(V+) – 5 2(V+) – 4
2(V–) + 5 2(V–) + 2
80
90
2.6
52
1
±0.02
±1
±0.0001
VO = –13V to +13V
TEMPERATURE RANGE
Specified
Operation
Storage
Thermal Resistance, ΘJA
SO-8 Surface-Mount
±750
±20
±60
TYP
MAX
UNITS
✽
✽
✽
✽
±1500
✽
✽
µV
µV/°C
µV/V
µV/mo
✽
✽
kΩ
kΩ
✽
✽
✽
V
V
dB
✽
✽
µVp-p
nV/√Hz
RTO
OUTPUT
Voltage, Positive
Negative
Current Limit, Continuous to Common
Capacitive Load (stable operation)
POWER SUPPLY
Rated Voltage
Operating Voltage Range
Quiescent Current
±100
±2
±5
0.5
MIN
50
50
VO = –13V to +13V
FREQUENCY RESPONSE
Small-Signal Bandwidth
Slew Rate
Settling Time: 0.1%
0.01%
Overload Recovery Time
MAX
RTO
INPUT IMPEDANCE(2)
Differential
Common-Mode
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Positive
Negative
Common-Mode Rejection Ratio
INA154UA
TYP
(V+) – 2
(V–) + 2
–3dB
✽
✽
✽
✽
±0.05
±10
±0.001
✽
✽
(V+) – 1.8
(V–) + 1.6
±60
500
3.1
14
2
3
3
10V Step, CL = 100pF
10V Step, CL = 100pF
50% Overdrive
±15
±4
±2.4
IO = 0mA
–40
–55
–55
150
±0.1
✽
±0.002
✽
✽
✽
✽
V
V
mA
pF
✽
✽
✽
✽
✽
MHz
V/µs
µs
µs
µs
✽
±18
±2.9
✽
+85
+125
+125
✽
✽
✽
V/V
%
ppm/°C
% of FS
✽
✽
✽
✽
V
V
mA
✽
✽
✽
°C
°C
°C
°C/W
✽Specifications the same as INA154U.
NOTES: (1) Includes effects of amplifier’s input bias and offset currents. (2) 25kΩ resistors are ratio matched but have ±20% absolute value. (3) 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.
®
INA154
2
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
TOP VIEW
SO-8
Ref
1
8
Supply Voltage, V+ to V– .................................................................... 40V
Input Voltage Range ......................................................................... ±80V
Output Short Circuit (to ground) ............................................. Continuous
Operating Temperature .................................................. –55°C to +125°C
Storage Temperature ..................................................... –55°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NIC
–In
2
7
V+
+In
3
6
Output
V–
4
5
Sense
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
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.
NC = No Internal Connection
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
PRODUCT
PACKAGE
PACKAGE
DRAWING
NUMBER(1)
INA154U
"
INA154UA
"
SO-8 Surface-Mount
"
SO-8 Surface-Mount
"
182
"
182
"
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER(2)
TRANSPORT
MEDIA
–40°C to +85°C
"
–40°C to +85°C
"
INA154U
"
INA154UA
"
INA154U
INA154U/2K5
INA154UA
INA154UA/2K5
Rails
Tape and Reel
Rails
Tape and Reel
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are
available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “INA154U/2K5” will get a single
2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.
®
3
INA154
TYPICAL PERFORMANCE CURVES
At TA = +25°C and VS = ±15V, unless otherwise noted.
GAIN vs FREQUENCY
COMMON-MODE REJECTION RATIO vs FREQUENCY
10
Common-Mode Rejection Ratio (dB)
100
Voltage Gain (dB)
0
–10
–20
80
60
40
20
0
–30
1k
10k
100k
1M
10M
1k
10k
Frequency (Hz)
POWER SUPPLY REJECTION RATIO vs FREQUENCY
40
80
Output Voltage (Vp-p)
100
–PSRR
60
40
30
20
10
+PSRR
20
0
0
100
1k
10k
100k
1M
100
1k
10k
100k
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE RANGE
vs OUTPUT VOLTAGE
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
10M
1
VS = ±15V
30
VO = 10Vrms
20
0.1
THD+Noise (%)
10
0
–10
–20
0.010
RL = 100kΩ
RL = 2kΩ
0.001
–30
–40
1M
Frequency (Hz)
40
Common-Mode Voltage (V)
1M
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
120
Power Supply Rejection Ratio (dB)
100k
Frequency (Hz)
VREF = 0V
RL = 2kΩ
RL = 600Ω
–50
0.0001
–20
–15
–10
–5
0
5
10
15
20
20
Output Voltage (V)
1k
Frequency (Hz)
®
INA154
100
4
10k 20k
TYPICAL PERFORMANCE CURVES
(CONT)
At TA = +25°C, and VS = ±15V, unless otherwise noted.
QUIESCENT CURRENT vs TEMPERATURE
SLEW RATE vs TEMPERATURE
4
16
3
14
Slew Rate (V/µs)
Quiescent Current (mA)
–SR
2
1
0
+SR
12
10
8
–75
–50
–25
0
25
50
75
100
125
–75
–50
–25
Temperature (°C)
SHORT-CIRCUIT CURRENT vs TEMPERATURE
50
75
100
125
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
13
40
Output Voltage Swing (V)
60
Short-Circuit Current (mA)
25
14
80
+ISC
20
0
–20
–ISC
–40
–60
–55°C
12
25°C
11
125°C
10
85°C
9
–9
85°C
125°C
–10
–11
–12
25°C
–13
–55°C
–14
–80
–75
–50
–25
0
25
50
75
100
125
0
±20
±40
±60
Temperature (°C)
Output Current (mA)
OUTPUT VOLTAGE NOISE SPECTRAL DENSITY
vs FREQUENCY
OUTPUT NOISE VOLTAGE
vs NOISE BANDWIDTH
10k
±80
±100
10k
100k
100
Noise Voltage (µVrms)
Voltage Noise (nV/√Hz)
0
Temperature (°C)
1k
100
10
10
1
0.1
1
10
100
1k
10k
100k
1M
1
Frequency (Hz)
10
100
1k
Frequency (Hz)
®
5
INA154
TYPICAL PERFORMANCE CURVES
(CONT)
At TA = +25°C, and VS = ±15V, unless otherwise noted.
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
Typical production distribution
of packaged units.
20
15
10
15
10
5
0
0
–1000
–900
–800
–700
–600
–500
–400
–300
–200
–100
0
100
200
300
400
500
600
700
800
900
1000
5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Offset Voltage Drift (µV/°C)
Offset Voltage (µV)
SMALL-SIGNAL STEP RESPONSE
LARGE-SIGNAL STEP RESPONSE
CL = 500pF
CL = 100pF
5V/div
50mV/div
CL = 500pF
1µs/div
1µs/div
SMALL-SIGNAL OVERSHOOT
vs LOAD CAPACITANCE
70
60
50
Overshoot (%)
Percent of Units (%)
20
25
Typical Production
Distribution of
Packaged Units.
Percent of Units (%)
25
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
40
30
20
RL = 2kΩ
100mV Step
10
0
0
400
800
1200
Load Capacitance (pF)
®
INA154
6
1600
2000
APPLICATIONS INFORMATION
Figure 1 shows the basic connections required for operation
of the INA154. Decoupling capacitors are strongly recommended in applications with noisy or high impedance power
supplies. The capacitors should be placed close to the
device pins as shown in Figure 1.
V+
V–
1µF
1µF
7
4
INA154
As shown in Figure 1, the output is referred to the reference
terminal (pin 1). A voltage applied to this pin will be
summed with output signal. The differential input signal is
connected to pins 2 and 3. The source impedances connected to the pinouts must be nearly equal to assure good
common-mode rejection. A 5Ω mismatch in source impedance will degrade the common-mode rejection of a typical
device to approximately 80dB (a 10Ω mismatch degrades
CMR to 74dB). If the source has a known impedance
mismatch, an additional resistor in series with the opposite
input can be used to preserve good common-mode rejection.
V2
V3
R1
25kΩ
2
R2
25kΩ
5
R3
25kΩ
3
6
RL
R4
25kΩ
VOUT = V3 – V2
Ref
Do not interchange pins 1 and 3 or pins 2 and 5, even though
nominal resistor values are equal. The resistors are laser
trimmed for precise resistor ratios to achieve accurate gain
and highest CMR. Interchanging these pins would not
provide specified performance.
1
FIGURE 1. Basic Power Supply and Signal Connections.
OPERATING VOLTAGE
The INA154 operates from ±4V to ±18V supplies with
excellent performance. Most behavior remains unchanged
throughout the full operating voltage range. Parameters
which vary significantly with operating voltage are shown
in the Typical Performance Curves.
INA154
2
V2
INPUT VOLTAGE RANGE
The INA154 can accurately measure differential signals
that are beyond the positive or negative power supply rails.
The linear common-mode range extends from 2•(V+) – 5V
to 2•(V–) +5V. See the Typical Performance Curve, “Input
Common-Mode Range vs Output Voltage.”
R1
R2
5
6
10Ω
V3
3
VO
R3
R4
OFFSET VOLTAGE TRIM
+15V
The INA154 is laser trimmed for low offset voltage and
drift. Most applications require no external offset adjustment. Figure 2 shows an optional circuit for trimming the
output offset voltage. 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.
VO = V 3 – V2
Offset Adjustment
Range = ±1V
1
150kΩ
100kΩ
10Ω
–15V
FIGURE 2. Offset Adjustment.
®
7
INA154
INA154
5
2
–In
6
1
V1
V2
BUF634 inside feedback
loop contributes no error.
INA154
2
5
V0 = V1 + V2
6
3
+In
1
3
BUF634
VO
(Low IQ mode)
FIGURE 3. Precision Summing Amplifier.
FIGURE 5. Boosting Output Current.
V1
INA154
–In
A1
2
5
R2
V+
V+
3
INA154
6
R1
2
VO
R2
5
1
3
7
V2
A2
6
+In
VO = (1 + 2R2/R1) (V2 –V1)
The INA154 can be combined with op amps to form a complete instrumentation amplifier with specialized performance characteristics. BurrBrown offers many complete high performance IAs. Products with related
performances are shown at the right.
FEATURE
SIMILIAR COMPLETE
BURR-BROWN IAs
Low Noise
Ultra Low Bias Current (fA)
Low Offset Drift, Low Noise
FET Input (pA)
INA103
INA116
INA114, INA128
INA111, INA121
A1, A2
OPA227
OPA129
OPA277
OPA2134
Ground
4
FIGURE 6. Pseudoground Generator.
FIGURE 4. Precision Instrumentation Amplifier.
®
INA154
1
8
(V+)/2
Ground
RL
V+
0V to 10V
In
12.5kΩ
1kΩ
7
50kΩ
INA154
2
OPA227
+15V
V2
2
5
25kΩ
25kΩ
6
REF102
6
10V
R1
50.1Ω
2N3904
Set R1 = R2
For 4-20mA applications,
the REF102 sets the 4mA
low-scale output for 0V input.
V3
3
25kΩ
25kΩ
1
R2
50.1Ω
4
4
IO = 4 to 20mA
IO = V 3 – V 2
RLOAD
1
1
+
40kΩ R2
FIGURE 7. Precision Voltage-to-Current Conversion.
The difference amplifier is a highly versatile building
block that is useful in a wide variety of applications. See
the INA105 data sheet for additional applications ideas,
including:
• Precision Summing Instrumentation Amplifier
• Precision Absolute Value Buffer
• Precision Voltage-to-Current Converter with Differential
Inputs
• Differential Input Voltage-to-Current Converter for Low
IOUT
• Current Receiver with Compliance to Rails
• Precision Unity-Gain Inverting Amplifier
• ±10V Precision Voltage Reference
• Isolating Current Source
• Differential Output Difference Amplifier
• ±5V Precision Voltage Reference
• Precision Unity-Gain Buffer
• Isolating Current Source with Buffering Amplifier for
Greater Accuracy
• Window Comparator with Window Span and Window
Center Inputs
• Precision Average Value Amplifier
• Precision G = 2 Amplifier (see INA157)
• Precision G = 1/2 Amplifier (see INA157)
• Precision Bipolar Offsetting
• Precision Voltage-Controlled Current Source with Buffered Differential Inputs and Gain
• Digitally Controlled Gain of ±1 Amplifier
• Precision Summing Amplifier with Gain
• Instrumentation Amplifier Guard Drive Generator
®
9
INA154