Burr Brown INA118P, INA118UB-2K5, INA118UB, INA118PB, INA118U-2K5 Datasheet

1

®

INA118

A

1

A

2

A

3

6

60kΩ60kΩ

60kΩ60kΩ

7

4

3

8

1

2

V

IN

V

IN

R

G

V+

V–

INA118

Ref

V

O

G = 1 +

50kΩ

R

G

–

+

5

Over-Voltage

Protection

25kΩ

25kΩ

Over-Voltage

Protection

FEATURES

● LOW OFFSET VOLTAGE: 50µV max

● LOW DRIFT: 0.5µV/°C max

● LOW INPUT BIAS CURRENT: 5nA max

● HIGH CMR: 110dB min

● INPUTS PROTECTED TO ±40V

● WIDE SUPPLY RANGE: ±1.35 to ±18V

● LOW QUIESCENT CURRENT: 350µA

● 8-PIN PLASTIC DIP, SO-8

DESCRIPTION

The INA118 is a low power, 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. Current-feedback
input circuitry provides wide bandwidth even at high
gain (70kHz at G = 100).

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

The INA118 is laser trimmed for very low offset voltage
(50µV), drift (0.5µV/°C) and high common-mode re­jection (110dB at G = 1000). It operates with power
supplies as low as ±1.35V, and quiescent current is only
350µA—ideal for battery operated systems.

The INA118 is available in 8-pin plastic DIP,
and SO-8 surface-mount packages, specified for
the –40°C to +85°C temperature range.

Precision, Low Power

INSTRUMENTATION AMPLIFIER

®

INA118

APPLICATIONS

● BRIDGE AMPLIFIER

● THERMOCOUPLE AMPLIFIER

● RTD SENSOR AMPLIFIER

● MEDICAL INSTRUMENTATION

● DATA ACQUISITION

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]

INA118

INA118

©1994 Burr-Brown Corporation PDS-1199D Printed in U.S.A. April, 1998

2

®

INA118

INPUT

Offset Voltage, RTI

Initial TA = +25°C ±10 ± 50/G ±50 ± 500/G ±25 ±100/G ±125±1000/G µV

vs Temperature T

A

= T

MIN

to T

MAX

±0.2 ± 2/G ±0.5 ± 20/G ±0.2 ± 5/G ±1 ± 20/G µV/°C

vs Power Supply V

S

= ±1.35V to ±18V ±1 ±10/G ±5 ± 100/G ✻ ±10 ±100/G µV/V

Long-Term Stability ±0.4 ±5/G ✻ µV/mo

Impedance, Differential 10

10

|| 1 ✻ Ω || pF

Common-Mode 10

10

|| 4 ✻ Ω || pF

Linear Input Voltage Range (V+) – 1 (V+) – 0.65 ✻✻ V

(V–) + 1.1 (V–)

+ 0.95 ✻✻ V
Safe Input Voltage ±40 ✻ V
Common-Mode Rejection VCM = ±10V, ∆RS = 1kΩ

G = 1 80 90 73 ✻ dB

G = 10 97 110 89 ✻ dB

G = 100 107 120 98 ✻ dB

G = 1000 110 125 100 ✻ dB

BIAS CURRENT ±1 ±5 ✻ ±10 nA

vs Temperature ±40 ✻ pA/°C

OFFSET CURRENT ±1 ±5 ✻ ±10 nA

vs Temperature ±40 ✻ pA/°C

NOISE VOLTAGE, RTI G = 1000, R

S

= 0Ω
f = 10Hz 11 ✻ nV/√Hz
f = 100Hz 10 ✻ nV/√Hz
f = 1kHz 10 ✻ nV/√Hz
fB = 0.1Hz to 10Hz 0.28 ✻ µVp-p

Noise Current

f=10Hz 2.0 ✻ pA/√Hz
f=1kHz 0.3 ✻ pA/√Hz
f

B

= 0.1Hz to 10Hz 80 ✻ pAp-p

GAIN

Gain Equation 1 + (50kΩ/R

G

) ✻ V/V
Range of Gain 1 10000 ✻✻V/V
Gain Error G = 1 ±0.01 ±0.024 ✻ ±0.1 %

G = 10 ±0.02 ±0.4 ✻ ±0.5 %

G = 100 ±0.05 ±0.5 ✻ ±0.7 %

G = 1000 ±0.5 ±1 ✻ ±2%

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

50kΩ Resistance

(1)

±25 ±100 ✻✻ppm/°C

Nonlinearity G = 1 ±0.0003 ±0.001 ✻ ±0.002 % of FSR

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

OUTPUT

Voltage: Positive R

L

= 10kΩ (V+) – 1 (V+) – 0.8 ✻✻ V

Negative R

L

= 10kΩ (V–) + 0.35 (V–) + 0.2 ✻✻ V

Single Supply High

VS = +2.7V/0V

(2)

, RL = 10kΩ

1.8 2.0 ✻✻ V

Single Supply Low

VS = +2.7V/0V

(2)

, RL = 10kΩ

60 35 ✻✻ mV
Load Capacitance Stability 1000 ✻ pF
Short Circuit Current +5/–12 ✻ mA

FREQUENCY RESPONSE

Bandwidth, –3dB G = 1 800 ✻ kHz

G = 10 500 ✻ kHz

G = 100 70 ✻ kHz

G = 1000 7 ✻ kHz

Slew Rate V

O

= ±10V, G = 10 0.9 ✻ V/µs

Settling Time, 0.01% G = 1 15 ✻ µs

G = 10 15 ✻ µs

G = 100 21 ✻ µs

G = 1000 210 ✻ µs

Overload Recovery 50% Overdrive 20 ✻ µs

POWER SUPPLY

Voltage Range ±1.35 ±15 ±18 ✻✻ ✻V
Current V

IN

= 0V ±350 ±385 ✻✻µA

TEMPERATURE RANGE

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

θ

JA

80 ✻ °C/W

INA118PB, UB INA118P, U

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

SPECIFICATIONS

ELECTRICAL

At TA = +25°C, VS = ±15V, RL = 10kΩ unless otherwise noted.

✻ Specification same as INA118PB, UB.
NOTE: (1) Temperature coefficient of the “50kΩ” term in the gain equation. (2) Common-mode input voltage range is limited. See text for discussion of low power supply
and single power supply operation.

3

®

INA118

PIN CONFIGURATION

8-Pin DIP and SO-8

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.

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.

ORDERING INFORMATION

PACKAGE
DRAWING TEMPERATURE

PRODUCT PACKAGE NUMBER

(1)

RANGE

INA118P 8-Pin Plastic DIP 006 –40°C to +85°C
INA118PB 8-Pin Plastic DIP 006 –40°C to +85°C
INA118U SO-8 Surface-Mount 182 –40°C to +85°C
INA118UB SO-8 Surface-Mount 182 –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.

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

Analog 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

ABSOLUTE MAXIMUM RATINGS

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.

R

G

V

–

IN

V

+

IN

V–

R

G

V+
V

O

Ref

1
2
3
4

8
7
6
5

Top View

4

®

INA118

INPUT COMMON-MODE RANGE

vs OUTPUT VOLTAGE

Output Voltage (V)

Common-Mode Voltage (V)

0

5

4

3

2

1

0

12345

G = 1

G = 2

G ≥ 10

V

D/2

–
+

–
+

V

CM

V

O

V

D/2

INA118

Ref

+5V

Single Supply

TYPICAL PERFORMANCE CURVES

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

GAIN vs FREQUENCY

60
50
40
30
20
10

0
–10
–20

Gain (dB)

Frequency (Hz)

1k 10k 100k 1M 10M

G = 100

G = 10

G = 1

G = 1000

COMMON-MODE REJECTION vs FREQUENCY

Frequency (Hz)

Common-Mode Rejection (dB)

1 10 1k 100k100

140

120

100

80

60

40

20

0

10k

G=1

G=10

G=100

G=1000

INPUT COMMON-MODE RANGE

vs OUTPUT VOLTAGE

Output Voltage (V)

Common-Mode Voltage (V)

–15 –10 0 5 15–5

15

10

5

0

–5

–10

–15

10

All

Gains

All

Gains

G = 1 G = 1

G ≥ 10

G ≥ 10

V

D/2

–
+

–
+

V

CM

V

O

V

D/2

INA118

Ref

–15V

+15V

INPUT COMMON-MODE RANGE

vs OUTPUT VOLTAGE

Output Voltage (V)

Common-Mode Voltage (V)

–5

5
4
3
2
1

0
–1
–2
–3
–4
–5

–4 –3 –2 –1 0 1 2 3 4 5

All

Gains

All

Gains

G = 1

G = 1

G ≥ 10

G ≥ 10

V

D/2

–
+

–
+

V

CM

V

O

V

D/2

INA118

Ref

–5V

+5V

INPUT COMMON-MODE RANGE

vs OUTPUT VOLTAGE

Output Voltage (V)

Common-Mode Voltage (V)

0

3

2

1

0

123

G = 1

G ≥ 10

V

D/2

–
+

–
+

V

CM

V

O

V

D/2

INA118

Ref

+3V

Single Supply