1997 Burr-Brown Corporation
PDS-1390A
Printed in U.S.A. July, 1997
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
FEATURES
q
SINGLE AND DUAL VERSIONS
q
LOW DISTORTION: 0.0005% at f = 1kHz
q
HIGH SLEW RATE: 14V/
s
q
FAST SETTLING TIME: 3
s to 0.01%
q
WIDE SUPPLY RANGE:
4V to
18V
q
LOW QUIESCENT CURRENT: 2.9mA max
q
HIGH CMRR: 90dB
q
FIXED GAIN = 0dB (1V/V)
q
PACKAGES--SINGLE: 8-PIN DIP, SO-8
DUAL: 14-PIN DIP, SO-14
APPLICATIONS
q
AUDIO DIFFERENTIAL LINE RECEIVER
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SUMMING AMPLIFIER
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UNITY-GAIN INVERTING AMPLIFIER
q
PSUEDOGROUND GENERATOR
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INSTRUMENTATION BUILDING BLOCK
q
CURRENT SHUNT MONITOR
q
VOLTAGE-CONTROLLED CURRENT
SOURCE
q
GROUND LOOP ELIMINATOR
DESCRIPTION
The INA134 and INA2134 are differential line receiv-
ers consisting of high performance op amps with on-
chip precision resistors. They are fully specified for
high performance audio applications and have excel-
lent ac specifications, including low distortion
(0.0005% at 1kHz) and high slew rate (14V/
s), assur-
ing good dynamic response. In addition, wide output
voltage swing and high output drive capability allow
use in a wide variety of demanding applications. The
dual version features completely independent circuitry
for lowest crosstalk and freedom from interaction,
even when overdriven or overloaded.
The INA134 and INA2134 on-chip resistors are laser
trimmed for accurate gain and optimum
common-mode rejection. Furthermore, excellent TCR
tracking of the resistors maintains gain accuracy and
common-mode rejection over temperature. Operation
is guaranteed from
4V to
18V (8V to 36V total
supply).
The INA134 is available in 8-pin DIP and SO-8
surface-mount packages. The INA2134 comes in
14-pin DIP and SO-14 surface-mount packages. Both
are specified for operation over the extended industrial
temperature range, 40
C to +85
C.
INA134
INA2134
INA134
INA134
INA2134
INA2134
AUDIO DIFFERENTIAL LINE RECEIVERS
0dB (G = 1)
Sense
INA134
Output
V+
Ref
In
+In
5
6
1
2
7
V
4
3
25k
25k
25k
25k
Sense A
INA2134
Out A
V+
Ref A
In A
+In A
12
13
14
2
11
V
4
3
25k
25k
25k
25k
25k
25k
25k
25k
B
A
Sense B
Out B
Ref B
In B
+In B
10
9
8
6
5
2
INA134/2134
SPECIFICATIONS: V
S
=
18V
At T
A
= +25
C, V
S
=
18V, R
L
= 2k
, and Ref Pin connected to Ground, unless otherwise noted.
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.
INA134PA, UA
INA2134PA, UA
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
AUDIO PERFORMANCE
Total Harmonic Distortion + Noise, f = 1kHz
V
IN
= 10Vrms
0.0005
%
Noise Floor
(1)
20kHz BW
100
dBu
Headroom
(1)
THD+N < 1%
+23
dBu
FREQUENCY RESPONSE
Small-Signal Bandwidth
3.1
MHz
Slew Rate
14
V/
s
Settling Time: 0.1%
10V Step, C
L
= 100pF
2
s
0.01%
10V Step, C
L
= 100pF
3
s
Overload Recovery Time
50% Overdrive
3
s
Channel Separation (dual), f = 1kHz
117
dB
OUTPUT NOISE VOLTAGE
(2)
f = 20Hz to 20kHz
7
Vrms
f = 1kHz
52
nV/
HZ
OFFSET VOLTAGE
(3)
Input Offset Voltage
V
CM
= 0V
100
1000
V
vs Temperature
Specified Temperature Range
2
V/
C
vs Power Supply
V
S
=
4V to
18V
5
60
V/V
INPUT
Common-Mode Voltage Range: Positive
V
O
= 0V
2(V+)5
2(V+)4
V
Negative
V
O
= 0V
2(V)+5
2(V)+2
V
Differential Voltage Range
See Typical Curve
Common-Mode Rejection
V
CM
=
31V, R
S
= 0
74
90
dB
Impedance
(4)
Differential
50
k
Common-Mode
50
k
GAIN
Initial
1
V/V
Error
V
O
= 16V to 16V
0.02
0.1
%
vs Temperature
1
10
ppm/
C
Nonlinearity
V
O
= 16V to 16V
0.0001
%
OUTPUT
Voltage Output, Positive
(V+)2
(V+)1.8
V
Negative
(V)+2
(V)+1.6
V
Current Limit, Continuous to Common
60
mA
Capacitive Load (Stable Operation)
500
pF
POWER SUPPLY
Rated Voltage
18
V
Voltage Range
4
18
V
Quiescent Current (per Amplifier)
I
O
= 0
2.4
2.9
mA
TEMPERATURE RANGE
Specification Range
40
85
C
Operation Range
55
125
C
Storage Range
55
125
C
Thermal Resistance,
JA
8-Pin DIP
100
C/W
SO-8 Surface-Mount
150
C/W
14-Pin DIP
80
C/W
SO-14 Surface-Mount
100
C/W
NOTES: (1) dBu = 20log (Vrms /0.7746). (2) Includes effects of amplifier's input current noise and thermal noise contribution of resistor network.
(3) Includes effects of amplifier's input bias and offset currents. (4) 25k
resistors are ratio matched but have
25% absolute value.
3
INA134/2134
PIN CONFIGURATIONS
Top View
8-Pin DIP/SO-8
Top View
14-Pin DIP/SO-14
Ref
In
+In
V
NC
V+
Output
Sense
NC = No Connection
1
2
3
4
8
7
6
5
Supply Voltage, V+ to V .................................................................... 40V
Input Voltage Range ..........................................................................
80V
Output Short-Circuit (to ground)
(2)
........................................... 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
NOTE: (1) Stresses above these ratings may cause permanent damage.
(2) One channel per package.
ABSOLUTE MAXIMUM RATINGS
(1)
PACKAGE/ORDERING INFORMATION
PACKAGE
SPECIFICATION
DRAWING
TEMPERATURE
PRODUCT
PACKAGE
NUMBER
(1)
RANGE
Single
INA134PA
8-Pin DIP
006
40
C to +85
C
INA134UA
SO-8 Surface-Mount
182
40
C to +85
C
Dual
INA2134PA
14-Pin DIP
010
40
C to +85
C
INA2134UA
SO-14 Surface-Mount
235
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.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
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.
NC
In A
+In A
V
+In B
In B
NC
Ref A
Out A
Sense A
V+
Sense B
Out B
Ref B
NC = No Connection
1
2
3
4
5
6
7
14
13
12
11
10
9
8
A
B
4
INA134/2134
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S
=
18V, unless otherwise noted.
OUTPUT VOLTAGE NOISE SPECTRAL DENSITY
vs FREQUENCY
Frequency (Hz)
Voltage Noise (nV/
Hz)
1
10
100
1k
10k
100k
1M
10k
1k
100
10
HARMONIC DISTORTION PRODUCTS
vs FREQUENCY
Frequency (Hz)
Amplitude (% of Fundamental)
20
100
1k
10k
20k
0.01
0.001
0.0001
0.00001
0.000001
( noise limited)
V
O
= 1Vrms
R
L
= 600
,
2nd Harmonic
R
L
= 2k
,
2nd Harmonic
R
L
= 2k
,
3rd Harmonic
R
L
= 600
,
3rd Harmonic
OUTPUT NOISE VOLTAGE
vs NOISE BANDWIDTH
Frequency (Hz)
Noise Voltage (Vrms)
1
10
100
1k
10k
100k
100
10
1
0.1
DIM INTERMODULATION DISTORTION
vs OUTPUT AMPLITUDE
Output Amplitude (dBu)
DIM (%)
10
5
0
5
10
15
20
25
5
1
0.1
0.010
0.001
R
L
= 2k
, 600
BW = 100kHz
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
Frequency (Hz)
THD+Noise (%)
20
100
1k
10k
20k
1
0.1
0.010
0.001
0.0001
V
O
= 10Vrms
R
L
= 600
R
L
= 100k
R
L
= 2k
HEADROOM - TOTAL HARMONIC DISTORTION+NOISE
vs OUTPUT AMPLITUDE
Output Amplitude (dBu)
THD+Noise (%)
0
5
10
15
20
25
30
1
0.1
0.010
0.001
0.0001
f = 1kHz
R
L
= 600
R
L
= 2k
,
100k
5
INA134/2134
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
18V, unless otherwise noted.
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
Frequency (Hz)
Output Voltage (Vp-p)
100
1k
10k
100k
1M
10M
40
30
20
10
0
GAIN vs FREQUENCY
Frequency (Hz)
Voltage Gain (dB)
1k
10k
100k
1M
10M
10
0
10
20
30
COMMON-MODE REJECTION vs FREQUENCY
Frequency (Hz)
Common-Mode Rejection (dB)
1k
10k
100k
1M
100
80
60
40
20
0
POWER SUPPLY REJECTION vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
100
1k
10k
100k
1M
120
100
80
60
40
20
0
PSR
+PSR
CHANNEL SEPARATION vs FREQUENCY
Frequency (Hz)
Channel Separation (dB)
20
100
1k
10k
20k
130
120
110
100
90
R
L
= 100k
R
L
= 2k
INPUT COMMON-MODE VOLTAGE RANGE
vs OUTPUT VOLTAGE
Output Voltage (V)
Common-Mode Voltage (V)
20
15
10
5
0
5
10
15
20
40
30
20
10
0
10
20
30
40
50
V
REF
= 0V
R
L
= 2k
V
S
= 18V
6
INA134/2134
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
18V, unless otherwise noted.
SHORT-CIRCUIT CURRENT vs TEMPERATURE
Temperature (C)
Short-Circuit Current (mA)
75
50
25
0
25
50
75
100
125
80
60
40
20
0
20
40
60
80
+I
SC
I
SC
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
Percent of Amplifiers (%)
Offset Voltage Drift (V/C)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
25
20
15
10
5
0
Typical Production Distribution
of Packaged Units.
QUIESCENT CURRENT vs TEMPERATURE
Temperature (C)
Quiescent Current (mA)
75
50
25
0
25
50
75
100
125
4
3
2
1
0
SLEW RATE vs TEMPERATURE
Temperature (C)
Slew Rate (V/s)
75
50
25
0
25
50
75
100
+SR
125
16
14
12
10
8
SR
QUIESCENT CURRENT vs SUPPLY VOLTAGE
Supply Voltage (V)
Quiescent Current (mA)
4
6
8
10
12
14
16
18
3
2
1
0
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
Percent of Amplifiers (%)
Offset Voltage (V)
1000
900
800
700
600
500
400
300
200
100
0
100
200
300
400
500
600
700
800
900
1000
25
20
15
10
5
0
Typical Production
Distribution of
Packaged Units.
7
INA134/2134
SMALL-SIGNAL OVERSHOOT
vs LOAD CAPACITANCE
Load Capacitance (pF)
Overshoot (%)
0
400
800
1200
1600
2000
70
60
50
40
30
20
10
0
R
L
= 2k
100mV Step
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
18V, unless otherwise noted.
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
17
16
15
14
13
12
12
13
14
15
16
17
0
20
40
60
80
100
Output Current (mA)
Output Voltage Swing (V)
55C
55C
25C
85C
85C
125C
125C
25C
SMALL-SIGNAL STEP RESPONSE
50mV/div
5V/div
LARGE-SIGNAL STEP RESPONSE
C
L
= 500pF
C
L
= 100pF
C
L
= 500pF
1
s/div
1
s/div
8
INA134/2134
APPLICATIONS INFORMATION
Figure 1 shows the basic connections required for operation
of the INA134. Decoupling capacitors are strongly recom-
mended in applications with noisy or high impedance power
supplies. The capacitors should be placed close to the device
pins as shown in Figure 1. All circuitry is completely
independent in the dual version assuring lowest crosstalk
and normal behavior when one amplifier is overdriven or
short-circuited.
As shown in Figure 1, the differential input signal is con-
nected to pins 2 and 3. The source impedances connected to
the inputs must be nearly equal to assure good common-
mode rejection. A 10
mismatch in source impedance will
degrade the common-mode rejection of a typical device to
approximately 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.
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.
AUDIO PERFORMANCE
The INA134 and INA2134 were designed for enhanced ac
performance. Very low distortion, low noise, and wide band-
width provide superior performance in high quality audio
applications. Laser-trimmed matched resistors provide opti-
mum common-mode rejection (typically 90dB), especially
when compared to circuits implemented with an op amp and
discrete precision resistors. In addition, high slew rate
(14V/
s) and fast settling time (3
s to 0.01%) ensure good
dynamic performance.
The INA134 and INA2134 have excellent distortion charac-
teristics. THD+Noise is below 0.002% throughout the audio
frequency range. Up to approximately 10kHz distortion is
below the measurement limit of commonly used test equip-
ment. Furthermore, distortion remains relatively flat over its
wide output voltage swing range (approximately 1.7V from
either supply).
OFFSET VOLTAGE TRIM
The INA134 and INA2134 are 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 10
to maintain good
common-mode rejection.
V
3
5
6
1
3
INA134
V
OUT
= V
3
V
2
2
R
3
25k
R
4
25k
R
1
25k
R
2
25k
V
2
In
+In
1F
V
4
1F
V+
7
FIGURE 1. Precision Difference Amplifier (Basic Power
Supply and Signal Connections).
FIGURE 2. Offset Adjustment.
V
3
5
6
3
V
O
INA134
V
O
= V
3
V
2
Offset Adjustment
Range = 300V
2
R
3
R
1
R
2
R
4
V
2
10
499k
10
100k
+15V
15V
1
9
INA134/2134
FIGURE 5. High Input Impedance Instrumentation Amplifier.
V
1
V
2
5
6
1
3
V
0
= V
1
+ V
2
INA134
2
FIGURE 3. Precision Summing Amplifier.
FIGURE 4. Boosting Output Current.
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:
Current Receiver with Compliance to Rails
Precision Unity-Gain Inverting Amplifier
10V Precision Voltage Reference
5V Precision Voltage Reference
Precision Unity-Gain Buffer
Precision Average Value Amplifier
Precision G = 2 Amplifier
Precision Summing Amplifier
Precision G = 1/2 Amplifier
Precision Bipolar Offsetting
Precision Summing Amplifier with Gain
Instrumentation Amplifier Guard Drive Generator
Precision Summing Instrumentation Amplifier
Precision Absolute Value Buffer
Precision Voltage-to-Current Converter with Differential
Inputs
Differential Input Voltage-to-Current Converter for Low
I
OUT
Isolating Current Source
Differential Output Difference Amplifier
Isolating Current Source with Buffering Amplifier for
Greater Accuracy
Window Comparator with Window Span and Window
Center Inputs
Precision Voltage-Controlled Current Source with Buff-
ered Differential Inputs and Gain
Digitally Controlled Gain of
1 Amplifier
5
6
3
INA134
2
1
V
0
0utput
V
1
1/2
OPA2134
1/2
OPA2134
R
2
R
2
R
1
In
V
2
+In
V
O
= (1 + 2R
2
/R
1
) (V
2
V
1
)
BUF634
+In
In
5
6
1
6
3
3
V
O
INA134
2
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