Control

®

INA

114

INA114

INA

114

Precision INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 50µV max q LOW DRIFT: 0.25µV/°C max q LOW INPUT BIAS CURRENT: 2nA max q HIGH COMMON-MODE REJECTION: 115dB min q INPUT OVER-VOLTAGE PROTECTION: ±40V q WIDE SUPPLY RANGE: ±2.25 to ±18V q LOW QUIESCENT CURRENT: 3mA max q 8-PIN PLASTIC AND SOL-16

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.

APPLICATIONS
q BRIDGE AMPLIFIER q THERMOCOUPLE AMPLIFIER q RTD SENSOR AMPLIFIER q MEDICALINSTRUMENTATION q DATA ACQUISITION
V+

7 (13) – VIN 2 (4) 1 (2) RG 8 (15) + VIN 3 (5) Over-Voltage Protection A2 25kΩ 25kΩ 25kΩ 5 (10) Ref 25kΩ A3 6 (11) Over-Voltage Protection INA114 Feedback A1 25kΩ 25kΩ (12) DIP Connected Internally VO G=1+ 50kΩ RG

4 (7) DIP V–
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
®

(SOIC)

©1992 Burr-Brown Corporation

PDS-1142D 1

Printed in U.S.A. March, 1998

INA114

SPECIFICATIONS
ELECTRICAL
At TA = +25°C, VS = ±15V,RL = 2kΩ, unless otherwise noted. INA114BP, BU PARAMETER INPUT Offset Voltage, RTI Initial vs Temperature vs Power Supply Long-Term Stability Impedance, Differential Common-Mode Input Common-Mode Range Safe Input Voltage Common-Mode Rejection CONDITIONS MIN TYP MAX MIN INA114AP, AU TYP MAX UNITS

TA = +25°C TA = TMIN to TMAX VS = ±2.25V to ±18V

±11 VCM = ±10V, ∆RS = 1kΩ G=1 G = 10 G = 100 G =1000 80 96 110 115

±10 + 20/G ±0.1 + 0.5/G 0.5 + 2/G ±0.2 + 0.5/G 1010 || 6 1010 || 6 ±13.5 96 115 120 120 ±0.5 ±8 ±0.5 ±8

±50 + 100/G ±0.25 + 5/G 3 + 10/G

±40

T

±25 + 30/G ±125 + 500/G ±0.25 + 5/G ±1 + 10/G T T T T T T T 90 106 110 110 T T T T T T T T T T T T

µV µV/°C µV/V µV/mo Ω || pF Ω || pF V V dB dB dB dB nA pA/°C nA pA/°C nV/√Hz nV/√Hz nV/√Hz µVp-p pA/√Hz pA/√Hz pAp-p V/VV/V % % % % ppm/°C ppm/°C % of FSR % of FSR % of FSR % of FSR V V V pF mA MHz kHz kHz kHz V/µs µs µs µs µs µs

75 90 106 106 ±2 ±2

BIAS CURRENT vs Temperature OFFSET CURRENT vs Temperature NOISE VOLTAGE, RTI f = 10Hz f = 100Hz f = 1kHz fB = 0.1Hz to 10Hz Noise Current f=10Hz f=1kHz fB = 0.1Hz to 10Hz GAIN Gain Equation Range of Gain Gain Error G = 1000, RS = 0Ω

±5 ±5

15 11 11 0.4 0.40.2 18 1 + (50kΩ/RG) 1 G=1 G = 10 G = 100 G = 1000 G=1 G=1 G = 10 G = 100 G = 1000 IO = 5mA, TMIN to TMAX VS = ±11.4V, RL = 2kΩ VS = ±2.25V, RL = 2kΩ ±13.5 ±10 ±1 ±0.01 ±0.02 ±0.05 ±0.5 ±2 ±25 ±0.0001 ±0.0005 ±0.0005 ±0.002 ±13.7 ±10.5 ±1.5 1000 +20/–15 1 100 10 1 0.6 18 20 120 1100 20 ±15 ±2.2 ±18 ±3 85 125 80 10000 ±0.05 ±0.4 ±0.5 ±1 ±10 ±100 ±0.001 ±0.002 ±0.002 ±0.01

T T T T T T T T T T T T TT T T T T T T T T T T T T T T T T T

Gain vs Temperature 50kΩ Resistance(1) Nonlinearity

T T ±0.5 ±0.7 ±2 ±10 T ±0.002 ±0.004 ±0.004 ±0.02

OUTPUT Voltage

Load Capacitance Stability Short Circuit Current FREQUENCY RESPONSE Bandwidth, –3dB G=1 G = 10 G = 100 G = 1000 VO = ±10V, G = 10 G=1 G = 10 G = 100 G = 1000 50% Overdrive

Slew Rate Settling Time,

0.3

T

0.01%

Overload...