Burr Brown INA114BU-1K, INA114BP, INA114AU-1K, INA114AU, INA114AP Datasheet

®

INA114

INA114

Precision

INSTRUMENTATION AMPLIFIER

INA114

FEATURES

● LOW OFFSET VOLTAGE: 50µV max

● LOW DRIFT: 0.25

µV/°C max

● LOW INPUT BIAS CURRENT: 2nA max

● HIGH COMMON-MODE REJECTION:

115dB min

● INPUT OVER-VOLTAGE PROTECTION:

±40V

● WIDE SUPPLY RANGE:

● LOW QUIESCENT CURRENT: 3mA max

● 8-PIN PLASTIC AND SOL-16

±2.25 to ±18V

APPLICATIONS

● BRIDGE AMPLIFIER

● THERMOCOUPLE AMPLIFIER

● RTD SENSOR AMPLIFIER

● MEDICAL INSTRUMENTATION

● DATA ACQUISITION

DESCRIPTION

The INA114 is a low cost, general purpose instrumen­tation amplifier offering excellent accuracy. Its versa­tile 3-op amp design and small size make it ideal for a
wide range of applications.

A single external resistor sets any gain from 1 to 10,000.
Internal input protection can withstand up to ±40V
without damage.

The INA114 is laser trimmed for very low offset voltage
(50µV), drift (0.25µV/°C) and high common-mode
rejection (115dB at G = 1000). It operates with power
supplies as low as ±2.25V, allowing use in battery
operated and single 5V supply systems. Quiescent cur­rent is 3mA maximum.

The INA114 is available in 8-pin plastic and SOL-16
surface-mount packages. Both are specified for the
–40°C to +85°C temperature range.

V+

(13)7

–

2

R

(4)

(2)

G

(15)

(5)

1

8

3

Over-Voltage

Protection

Over-Voltage

Protection

A

1

25kΩ

25kΩ

A

2

DIP (SOIC)

V

IN

+

V

IN

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]

©1992 Burr-Brown Corporation PDS-1142D Printed in U.S.A. March, 1998

INA114

25kΩ25kΩ

A

3

25kΩ25kΩ

(7)4

V–

1

Feedback

(12)

6

(11)

5

(10)

DIP Connected

Internally

V

O

G = 1 +

Ref

INA114

50kΩ

R

G

®

SPECIFICATIONS

ELECTRICAL

At TA = +25°C, VS = ±15V, RL = 2kΩ, unless otherwise noted.

INA114BP, BU INA114AP, AU
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
INPUT

Offset Voltage, RTI

Initial T

vs Temperature T
vs Power Supply V

Long-Term Stability ±0.2 + 0.5/G ✻ µV/mo

Impedance, Differential 10

Common-Mode 10
Input Common-Mode Range ±11 ±13.5 ✻✻ V
Safe Input Voltage ±40 ✻ V
Common-Mode Rejection V

BIAS CURRENT ±0.5 ±2 ✻ ±5nA

vs Temperature ±8 ✻ pA/°C

OFFSET CURRENT ±0.5 ±2 ✻ ±5nA

vs Temperature ±8 ✻ pA/°C

NOISE VOLTAGE, RTI G = 1000, R

f = 10Hz 15 ✻ nV/√Hz
f = 100Hz 11 ✻ nV/√Hz
f = 1kHz 11 ✻ nV/√Hz

= 0.1Hz to 10Hz 0.4 ✻ µVp-p

f

B

Noise Current

f=10Hz 0.4 ✻ pA/√Hz
f=1kHz 0.2 ✻ pA/√Hz

= 0.1Hz to 10Hz 18 ✻ pAp-p

f

B

GAIN

Gain Equation 1 + (50kΩ/R
Range of Gain 1 10000 ✻✻V/V
Gain Error G = 1 ±0.01 ±0.05 ✻✻%

Gain vs Temperature G = 1 ±2 ±10 ✻ ±10 ppm/°C

50kΩ Resistance

Nonlinearity G = 1 ±0.0001 ±0.001 ✻ ±0.002 % of FSR

OUTPUT

Voltage I

Load Capacitance Stability 1000 ✻ pF
Short Circuit Current +20/–15 ✻ mA

FREQUENCY RESPONSE

Bandwidth, –3dB G = 1 1 ✻ MHz

Slew Rate V
Settling Time, 0.01% G = 1 18 ✻ µs

(1)

Overload Recovery 50% Overdrive 20 ✻ µs

POWER SUPPLY

Voltage Range ±2.25 ±15 ±18 ✻✻ ✻V
Current V

TEMPERATURE RANGE

Specification –40 85 ✻✻°C
Operating –40 125 ✻✻°C

θ

JA

✻ Specification same as INA114BP/BU.
NOTE: (1) Temperature coefficient of the “50kΩ” term in the gain equation.

= +25°C ±10 + 20/G ±50 + 100/G ±25 + 30/G ±125 + 500/G µV

A

= T

to T

A

MIN

= ±2.25V to ±18V 0.5 + 2/G 3 + 10/G ✻✻µV/V

S

= ±10V, ∆RS = 1kΩ

CM

MAX

G = 1 80 96 75 90 dB

G = 10 96 115 90 106 dB

G = 100 110 120 106 110 dB

G = 1000 115 120 106 110 dB

= 0Ω

S

G = 10 ±0.02 ±0.4 ✻ ±0.5 %

G = 100 ±0.05 ±0.5 ✻ ±0.7 %

G = 1000 ±0.5 ±1 ✻ ±2%

±0.1 + 0.5/G ±0.25 + 5/G ±0.25 + 5/G ±1 + 10/G µV/°C

10

|| 6 ✻ Ω || pF

10

|| 6 ✻ Ω || pF

) ✻ V/V

G

±25 ±100 ✻✻ppm/°C

G = 10 ±0.0005 ±0.002 ✻ ±0.004 % of FSR

G = 100 ±0.0005 ±0.002 ✻ ±0.004 % of FSR

G = 1000 ±0.002 ±0.01 ✻ ±0.02 % of FSR

= 5mA, T

O

= ±11.4V, RL = 2kΩ±10 ±10.5 ✻✻ V

V

S

= ±2.25V, RL = 2kΩ±1 ±1.5 ✻✻ V

V

S

O

to T

MIN

G = 10 100 ✻ kHz

G = 100 10 ✻ kHz

G = 1000 1 ✻ kHz

= ±10V, G = 10 0.3 0.6 ✻✻ V/µs

G = 10 20 ✻ µs

G = 100 120 ✻ µs

G = 1000 1100 ✻ µs

= 0V ±2.2 ±3 ✻✻mA

IN

±13.5 ±13.7 ✻✻ V

MAX

80 ✻ °C/W

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.

®

INA114

2

PIN CONFIGURATIONS

ELECTROSTATIC

P Package 8-Pin DIP

R

G

–

V

IN

+

V

IN

V–

U Package SOL-16 Surface-Mount

1

NC

2

R

G

3

NC

–

4

V

IN

+

5

V

IN

6

NC

7

V–

8

NC

Top View

1
2
3
4

Top View

ABSOLUTE MAXIMUM RATINGS

(1)

8
7
6
5

R
V+
V
Ref

16
15
14
13
12
11
10

9

G

O

NC
R

G

NC
V+
Feedback
V

O

Ref
NC

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.

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

INA114AP 8-Pin Plastic DIP 006 –40°C to +85°C
INA114BP 8-Pin Plastic DIP 006 –40°C to +85°C
INA114AU SOL-16 Surface-Mount 211 –40°C to +85°C
INA114BU SOL-16 Surface-Mount 211 –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.

(1)

RANGE

Supply Voltage .................................................................................. ±18V

Input Voltage Range .......................................................................... ±40V

Output Short-Circuit (to ground) .............................................. Continuous

Operating Temperature ................................................. –40°C to +125°C

Storage Temperature ..................................................... –40°C to +125°C

Junction Temperature.................................................................... +150°C

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

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

®

3

INA114

TYPICAL PERFORMANCE CURVES

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

1k

100

10

Gain (V/V)

1

10 100 10k 100k 1M1k

INPUT COMMON-MODE VOLTAGE RANGE

15

10

5

Limited by A
+ Output Swing

1

V
V

0

–5

Common-Mode Voltage (V)

–10

A3 – Output
Swing Limit

Limited by A

– Output Swing

2

–15

–15 –10 0 5 15–5

GAIN vs FREQUENCY

Frequency (Hz)

vs OUTPUT VOLTAGE

–

D/2

+
–

D/2

+

V

CM

(Any Gain)

Output Voltage (V)

Limited by A

+ Output Swing

V

O

A3 + Output

Swing Limit

1

Limited by A
– Output Swing

10

140

COMMON-MODE REJECTION vs FREQUENCY

G = 100, 1k

120

G = 10

100

80

G = 1k
G = 100

60

G = 10

40

Common-Mode Rejection (dB)

20

G = 1

0

10 100 10k 100k 1M1k

Frequency (Hz)

POSITIVE POWER SUPPLY REJECTION

140

2

120

vs FREQUENCY

100

80

60

40

Power Supply Rejection (dB)

20

G = 1000

G = 100
G = 10

G = 1

0

10 100 10k 1M1k

100k

Frequency (Hz)

NEGATIVE POWER SUPPLY REJECTION

140

120

100

80

60

40

Power Supply Rejection (dB)

20

0

10 100 10k 1M1k

®

INA114

vs FREQUENCY

G = 100

G = 10
G = 1

Frequency (Hz)

G = 1000

100k

INPUT-REFERRED NOISE VOLTAGE

1k

100

vs FREQUENCY

G = 1

G = 10

10

G = 100, 1000

G = 1000

Input-Referred Noise Voltage (nV/√ Hz)

1

110 1k100

BW Limit

10k

Frequency (Hz)

4