BURR-BROWN INA126, INA2126 User Manual

®

40kΩ

10kΩ

10kΩ

40kΩ

INA2126

5

7

8

1

3

4

2

9
6

R

G

V

IN

–

V

IN

+

V+

V–

V

O

= (V

IN

– VIN) G

–

+

80k

R

G

G = 5 +

V

O

= (VIN – VIN) G

–

+

80k
R

G

G = 5 +

40kΩ

10kΩ

10kΩ

40kΩ

12

16

14

13

15

11

10

R

G

V

IN

–

V

IN

+

INA126

INA2126

INA126

INA126

INA2126

INA2126

INA2126

Micro

POWER INSTRUMENTATION AMPLIFIER

Single and Dual Versions

FEATURES

● LOW QUIESCENT CURRENT: 175µA/chan.

● WIDE SUPPLY RANGE:

● LOW OFFSET VOLTAGE: 250

● LOW OFFSET DRIFT: 3

● LOW NOISE: 35nV/√Hz

● LOW INPUT BIAS CURRENT: 25nA max

● 8-PIN DIP, SO-8, MSOP-8 SURFACE- MOUNT

DUAL: 16-Pin DIP, SO-16, SSOP-16

APPLICATIONS

● INDUSTRIAL SENSOR AMPLIFIER:

Bridge, RTD, Thermocouple

● PHYSIOLOGICAL AMPLIFIER:

ECG, EEG, EMG

● MULTI-CHANNEL DATA ACQUISITION

● PORTABLE, BATTERY OPERATED SYSTEMS

±1.35V to ±18V

µV max

µV/°C max

DESCRIPTION

The INA126 and INA2126 are precision instrumentation
amplifiers for accurate, low noise differential signal acquisi­tion. Their two-op-amp design provides excellent perfor­mance with very low quiescent current (175µA/chan.). This,
combined with wide operating voltage range of ±1.35V to
±18V, makes them ideal for portable instrumentation and data
acquisition systems.

Gain can be set from 5V/V to 10000V/V with a single
external resistor. Laser trimmed input circuitry provides
low offset voltage (250µV max), low offset voltage drift
(3µV/°C max) and excellent common-mode rejection.

Single version package options include 8-pin plastic DIP,
SO-8 surface mount, and fine-pitch MSOP-8 surface-mount.
Dual version is available in the space-saving SSOP-16 fine­pitch surface mount, SO-16, and 16-pin DIP. All are speci­fied for the –40°C to +85°C industrial temperature range.

V+

+

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]

©1996 Burr-Brown Corporation PDS-1365C Printed in U.S.A. September, 1997

3

8

R

G

1

2

7

40kΩ

10kΩ

10kΩ

40kΩ

4

V–

INA126

6

5

= (VIN – VIN) G

V

O

G = 5 +

–+

80k

R

G

SPECIFICATIONS

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

INA126P, U, E INA126PA, UA, EA

INA2126P, U, E INA2126PA, UA, EA
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
INPUT

Offset Voltage, RTI ±100 ±250 ±150 ±500 µV

vs Temperature ±0.5 ±3 ✻ ±5 µV/°C

vs Power Supply (PSRR) V
Input Impedance 10
Safe Input Voltage R

Common-Mode Voltage Range V
Channel Separation (dual) G = 5, dc 130 dB
Common-Mode Rejection R

INA2126U (dual SO-16) 80 94 dB
INPUT BIAS CURRENT –10 –25 ✻ –50 nA

vs Temperature ±30 ✻ pA/°C
Offset Current ±0.5 ±2 ✻ ±5nA

vs Temperature ±10 ✻ pA/°C
GAIN G = 5 to 10k ✻ V/V

Gain Equation G = 5 + 80kΩ/R
Gain Error V

vs Temperature G = 5 ±2 ±10 ✻✻ppm/°C
Gain Error V

vs Temperature G = 100 ±25 ±100 ✻✻ppm/°C
Nonlinearity G = 100, V

NOISE

Voltage Noise, f = 1kHz 35 ✻ nV/√Hz

f = 100Hz 35 ✻ nV/√Hz
f = 10Hz 45 ✻ nV/√Hz

= 0.1Hz to 10Hz 0.7 ✻ µVp-p

f

Current Noise, f = 1kHz 60 ✻ fA/√Hz

B

= 0.1Hz to 10Hz 2 ✻ pAp-p

f

B

OUTPUT

Voltage, Positive R

Negative R
Short-Circuit Current Short-Circuit to Ground +10/–5 ✻ mA
Capacitive Load Drive 1000 ✻ pF

FREQUENCY RESPONSE

Bandwidth, –3dB G = 5 200 ✻ kHz

Slew Rate V
Settling Time, 0.01% 10V Step, G = 5 30 ✻ µs

Overload Recovery 50% Input Overload 4 ✻ µs

POWER SUPPLY

Voltage Range ±1.35 ±15 ±18 ✻✻✻ V
Current (per channel) I

TEMPERATURE RANGE

Specification Range –40 +85 ✻✻°C
Operation Range –55 +125 ✻✻°C
Storage Range –55 +125 ✻✻°C
Thermal Resistance,

8-Pin DIP 100 ✻ °C/W

θ

JA

SO-8 Surface-Mount 150 ✻ °C/W
MSOP-8 Surface-Mount 200 ✻ °C/W
16-Pin DIP (dual) 80 ✻ °C/W
SO-16 (dual) 100 ✻ °C/W
SSOP-16 (dual) 100 ✻ °C/W

✻ Specification same as INA126P, INA126U, INA126E; INA2126P, INA2126U, INA2126E.

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.

®

INA126, INA2126

= ±1.35V to ±18V 5 15 ✻ 50 µV/V

S

= 0 (V–)–0.5 (V+)+0.5 ✻✻V

S

= 1kΩ (V–)–10 (V+)+10 ✻✻V

R

S

= 0V ±11.25 ±11.5 ✻✻ V

O

= 0, VCM = ±11.25V 83 94 74 90 dB

S

= ±14V, G = 5 ±0.02 ±0.1 ✻ ±0.18 %

O

= ±12V, G = 100 ±0.2 ± 0.5 ✻ ±1%

O

= ±14V ±0.002 ±0.012 ✻✻ %

O

= 25kΩ (V+)–0.9 (V+)–0.75 ✻✻ V

L

= 25kΩ (V–)+0.95 (V–)+0.8 ✻✻ V

L

9

|| 4 ✻ Ω || pF

G

✻ V/V

G = 100 9 ✻ kHz
G = 500 1.8 ✻ kHz

= ±10V, G = 5 0.4 ✻ V/µs

O

10V Step, G = 100 160 ✻ µs
10V Step, G = 500 1500 ✻ µs

= 0 ±175 ±200 ✻✻ µA

O

2

PIN CONFIGURATION (Single)

Top View 8-Pin DIP, SO-8, MSOP-8

1

R

G

–

2

V

IN

+

3

V

IN

4

V–

8

R

G

7

V+

6

V

O

5

Ref

PIN CONFIGURATION (Dual)

Top View 16-Pin DIP, SO-16, SSOP-16

V
V

R
R

Ref

V

Sense

–
INA

+
INA

V–

1
2
3

GA

4

GA

5

A

6

OA

7

A

8

–

16

V

INB
+

15

V

INB

14

R

GB

13

R

GB

12

Ref

B

11

V

OB

10

Sense

B

9

V+

ABSOLUTE MAXIMUM RATINGS

Power Supply Voltage, V+ to V– ........................................................ 36V

Input Signal Voltage
Input Signal Current

(2)

........................................... (V–)–0.7 to (V+)+0.7V

(2)

...................................................................... 10mA

(1)

Output Short Circuit ................................................................. Continuous

Operating Temperature ................................................. –55°C to +125°C

Storage Temperature ..................................................... –55°C to +125°C

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

NOTES: (1) Stresses above these ratings may cause permanent damage.
(2) Input signal voltage is limited by internal diodes connected to power
supplies. See text.

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.

PACKAGE INFORMATION

PRODUCT PACKAGE NUMBER

PACKAGE DRAWING TRANSPORT

Single

INA126PA 8-Pin DIP 006 INA126PA INA126PA Rails
INA126P 8-Pin DIP 006 INA126P INA126P Rails

INA126UA SO-8 182 INA126UA INA126UA Rails or Reel
INA126U SO-8 182 INA126U INA126U Rails or Reel

INA126EA

INA126E

(2)

" " " " INA126EA-2500 "

(2)

MSOP-8 337 A26

MSOP-8 337 A26

" " " " INA126E-2500 "

Dual

INA2126PA 16-Pin DIP 180 INA2126PA INA2126PA Rails
INA2126P 16-Pin DIP 180 INA2126P INA2126P Rails

INA2126UA SO-16 265 INA2126UA INA2126UA Rails
INA2126U SO-16 265 INA2126U INA2126U Rails

INA2126EA

INA2126E

(2)

" " " " INA2126EA-2500 "

(2)

SSOP-16 322 INA2126EA INA2126EA-250 Reel Only

SSOP-16 322 INA2126E INA2126E-250 Reel Only

" " " " INA2126E-2500 "

NOTES: (1) For detailed drawing and dimension table, see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) MSOP-8 and SSOP-16 packages are
available only on 250 or 2500 piece reels. (3) Grade designation is marked on reel.

(1)

PACKAGE MARKING ORDERING NUMBER MEDIA

(3)

(3)

INA126EA-250 Reel Only

INA126E-250 Reel Only

®

3

INA126, INA2126