TEXAS INSTRUMENTS INA103 Technical data

®

INA103

INA103

Low Noise, Low Distortion

INSTRUMENT ATION AMPLIFIER

INA103

FEA TURES

● LOW NOISE: 1nV/√Hz

● LOW THD+N: 0.0009% at 1kHz, G = 100

● HIGH GBW: 100MHz at G = 1000

● WIDE SUPPLY RANGE:

±9V to ±25V

● HIGH CMRR: >100dB

● BUILT-IN GAIN SETTING RESISTORS:

G = 1, 100

● UPGRADES AD625

DESCRIPTION

The INA103 is a very low noise, low distortion mono­lithic instrumentation amplifier. Its current-feedback
circuitry achieves very wide bandwidth and excellent
dynamic response. It is ideal for low-level audio
signals such as balanced low-impedance microphones.
The INA103 provides near-theoretical limit noise per­formance for 200Ω source impedances. Many indus­trial applications also benefit from its low noise and
wide bandwidth.

Unique distortion cancellation circuitry reduces dis­tortion to extremely low levels, even in high gain. Its
balanced input, low noise and low distortion provide
superior performance compared to transformer-coupled
microphone amplifiers used in professional audio
equipment.

The INA103’s wide supply voltage (±9 to ±25V) and
high output current drive allow its use in high-level
audio stages as well. A copper lead frame in the plastic
DIP assures excellent thermal performance.

APPLICATIONS

● HIGH QUALITY MICROPHONE PREAMPS

(REPLACES TRANSFORMERS)

● MOVING-COIL PREAMPLIFIERS

● DIFFERENTIAL RECEIVERS

● AMPLIFICATION OF SIGNALS FROM:

Strain Gages (Weigh Scale Applications)
Thermocouples
Bridge Transducers

The INA103 is available in 16-pin plastic DIP and
SOL-16 surface-mount packages. Commercial and In­dustrial temperature range models are available.

Offset

Null

3 4

9

V+

Offset

6k

–

A

+

6k

Null

Ω

3

Ω

V–

11

Sense

Output

10

Ref

7

8

–Input

–Gain Sense

–R

G = 100

+R

+Gain Sense

+Input

–Gain Drive

12

Ω

1

3kΩ

3k

Ω

2

5

+Gain Drive

6k

Ω

6k

+

16

A

–

15
13

G

60.6Ω

14

6

G

–

2

A

+

1

SBOS003

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

©

1990 Burr-Brown Corporation PDS-1016H Printed in U.S.A. March, 1998

1

INA103

®

SPECIFICATIONS

All specifications at TA = +25°C, VS = ±15V and RL = 2kΩ, unless otherwise noted.

INA103KP, KU
PARAMETER CONDITIONS MIN TYP MAX UNITS
GAIN

Range of Gain 1 1000 V/V
Gain Equation
Gain Error, DC G = 1 ±10V Output 0.005 0.05 %

Gain Temp. Co. G = 1 ±10V Output 10 ppm/°C

Nonlinearity, DC G = 1 ±10V Output 0.0003 0.01 % of FS

OUTPUT

Voltage, R

Current T
Short Circuit Current ±70 mA
Capacitive Load Stability 10 nF

INPUT OFFSET VOLTAGE

Initial Offset RTI
(KU Grade) (250+ 5000/G) µV
vs Temp G = 1 to 1000 T

vs Supply ±9V to ±25V 0.2 + 8/G 4 + 60/G µV/V

INPUT BIAS CURRENT

Initial Bias Current 2.5 12 µA

vs Temp T

Initial Offset Current 0.04 1 µA

vs Temp T

INPUT IMPEDANCE

Differential Mode 60 || 2 MΩ || pF
Common-Mode 60 || 5 MΩ || pF

INPUT VOLTAGE RANGE

Common-Mode Range
CMR

G = 1 DC to 60Hz 72 86 dB
G = 100 DC to 60Hz 100 125 dB

INPUT NOISE

Voltage

10Hz 2 nV/√Hz
100Hz 1.2 nV/√Hz
1kHz 1 nV/√Hz

Current, 1kHz 2 pA/√Hz

OUTPUT NOISE

Voltage 1kHz 65 nV/√Hz
A Weighted, 20Hz-20kHz 20Hz-20kHz –100 dBu

DYNAMIC RESPONSE

–3dB Bandwidth: G = 1 Small Signal 6 MHz

Full Power Bandwidth G = 1

V

OUT

Slew Rate G = 1 to 500 15 V/µs
THD + Noise G = 100, f = 1kHz 0.0009 %
Settling Time 0.1%

G = 1 V
G = 100 1.5 µs

Settling Time 0.01%

G = 1 V
G = 100 3.5 µs

Overload Recovery

NOTES: (1) Gains other than 1 and 100 can be set by adding an external resistor, RG between pins 2 and 15. Gain accuracy is a function of RG. (2) FS = Full Scale.
(3) Adjustable to zero. (4) V
for output to return from saturation to linear operation following the removal of an input overdrive voltage.

(1)

G = 1 + 6kΩ/R

G

V/V

G = 100 0.07 0.25 %
Equation 0.05 %

G = 100 25 ppm/°C
Equation 25 ppm/°C

G = 100 0.0006 0.01 % of FS

= 600Ω TA = T

L

R

= 600Ω VS = ±25, TA = 25°C ±20 ± 21 V

L

(3)

G = 1000 T

(4)

(5)

A

A

A

A

A

= T

= T

= T

= T

= T

to T

MIN

to T

MIN

to T

MIN

to T

MIN

to T

MIN

to T

MIN

RS = 0Ω

MAX

MAX

MAX

MAX

MAX

MAX

±11.5 ± 12 V

±40 mA

(30 + 1200/G) µV

1 + 20/G µV/°C

µV/°C

15 nA/°C

0.5 nA/°C

±11 ± 12 V

G = 100 Small Signal 800 kHz

= ±10V, RL = 600Ω 240 kHz

= 20V Step 1.7 µs

O

= 20V Step 2 µs

O

(6)

= 0V, see Typical Curves for VCM vs VO. (5) V

O

50% Overdrive 1 µs

2

NOISE RTI

= √V

N INPUT

+ (V

/Gain)2 + 4KTRG. See Typical Curves. (6) Time required

N OUTPUT

(2)

®

INA103

2

SPECIFICATIONS (CONT)

All specifications at TA = +25°C, VS = ±15V and RL = 2kΩ, unless otherwise noted.

INA103KP, KU
PARAMETER CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY

Rated Voltage ±15 V
Voltage Range ±9 ±25 V
Quiescent Current 9 12.5 mA

TEMPERATURE RANGE

Specification 0 +70 °C
Operation –40 +85 °C
Storage –40 +100 °C
Thermal Resistance,

θ

JA

100 °C/W

PIN CONFIGURATION

Top View DIP or SOIC

(1)

+R

Ref

V–

1
2
3
4
5
6

G

7
8

+ Input

+ Gain Sense

+ Offset Null

– Offset Null

+ Gain Drive

NOTE: (1) Pin 1 Marking—SOL-16 Package

16
15
14
13
12
11
10

9

– Input
– Gain Sense
G = 100
–R

G

– Gain Drive
Sense
Output
V+

PACKAGE/ORDERING INFORMATION

PACKAGE
DRAWING TEMPERATURE

PRODUCT PACKAGE NUMBER

INA103KP Plastic DIP 180 0°C to +70°C
INA103KU SOL-16 211 0°C to +70°C

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.

(1)

RANGE

ELECTROSTATIC
DISCHARGE SENSITIVITY

Any 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.

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

published specifications.

ABSOLUTE MAXIMUM RATINGS

Power Supply Voltage ....................................................................... ±25V

Input Voltage Range, Continuous ....................................................... ±V

Operating Temperature Range:........................................–40°C to +85 °C

Storage Temperature Range: ........................................... –40°C to +85°C

Junction Temperature:

P, U Package.............................................................................. +125°C

Lead Temperature (soldering, 10s) ............................................... +300°C

Output Short Circuit to Common ............................................. Continuous

NOTE: (1) Stresses above these ratings may cause permanent damage.

(1)

S

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.

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INA103

®

TYPICAL PERFORMANCE CURVES

At TA = +25°C, VS = ±15V, unless otherwise noted.

±25

±20

±15

±10

Input Voltage Range (V)

±5

±5 ±10 ±15 ±20 ±25

22

16.5

11

5.5

Common-Mode Voltage (V)

INPUT VOLTAGE RANGE vs SUPPLY

Power Supply Voltage (V)

MAX COMMON-MODE VOLTAGE

vs OUTPUT VOLTAGE

V = ±25V

S

V = ±15V

S

±25

±20

±15

Output Voltage (V)

±10

±5

±5 ±10 ±15 ±20 ±25

±16

±12

±8

Output Voltage (V)

±4

OUTPUT SWING vs SUPPLY

Power Supply Voltage (V)

OUTPUT SWING vs LOAD RESISTANCE

0 5.5 11 16.5 22

Output Voltage (V)

OFFSET VOLTAGE vs TIME FROM POWER UP

20

10

OSI

0

Change In V (µV)

–10

–20

012 45

®

(G = 100)

3

Time (min)

INA103

2.60

2.55

2.50

2.45

2.40

2.35

Input Bias Current (µA)

2.30

2.25

4

±0

0 200 400 600 800 1k

Load Resistance ( )

INPUT BIAS CURRENT vs SUPPLY

9 10 15 20 25

Power Supply Voltage (±V)

Ω

TYPICAL PERFORMANCE CURVES (CONT)

SETTLING TIME vs GAIN

(0.1%, 20V STEP)

Settling Time (µs)

Gain

1 10 100 1000

10

8

6

4

2

0

At TA = +25°C, VS = ±15V, unless otherwise noted.

6

5

4

3

Input Bias Current (µA)

2

1

INPUT BIAS CURRENT vs TEMPERATURE

–55

SMALL SIGNAL TRANSIENT RESPONSE

0 50 100 125

Temperature (°C)

(G = 100)

SMALL SIGNAL TRANSIENT RESPONSE

(G = 1)

Output Voltage (V)

Time (µs)

LARGE SIGNAL TRANSIENT RESPONSE

(G = 1)

Output Voltage (V)

Time (µs)

LARGE SIGNAL TRANSIENT RESPONSE

Output Voltage (V)

(G = 100)

Time (µs)

Output Voltage (V)

Time (µs)

®

5

INA103