INA106

INA 10 6
SBOS152A AUGUST 1987 REVISED OCTOBER 2003
Precision Gain = 10 DIFFERENTIAL AMPLIFIER

FEATURES

q q q q q ACCURATE GAIN: 0.025% max HIGH COMMON-MODE REJECTION: 86dB min NONLINEARITY: 0.001% max EASY TO USE PLASTIC 8-PIN DIP, SO-8 SOIC PACKAGES

APPLICATIONS

q q q q q G = 10 DIFFERENTIAL AMPLIFIER G = +10 AMPLIFIER G = 10 AMPLIFIER G = +11 AMPLIFIER INSTRUMENTATION AMPLIFIER

DESCRIPTION

The INA106 is a monolithic Gain = 10 differential amplifier consisting of a precision op amp and on-chip metal film resistors. The resistors are laser trimmed for accurate gain and high common-mode rejection. Excellent TCR tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. The differential amplifier is the foundation of many commonly used circuits. The INA106 provides this precision circuit function without using an expensive resistor network. The INA106 is available in 8-pin plastic DIP and SO-8 surface-mount packages.

R1 10k

R2 100k

Sense V+

Output

R3 10k R4 100k 1

V Reference
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 1987-2003, Texas Instruments Incorporated

www.ti.com

SPECIFICATIONS

ELECTRICAL

At +25C, VS = 15V, unless otherwise specified. INA106KP, U PARAMETER GAIN Initial(1) Error vs Temperature Nonlinearity(2) OUTPUT Related Voltage Rated Current Impedance Current Limit Capacitive Load INPUT Impedance Voltage Range Common-Mode Rejection(3) OFFSET VOLTAGE Initial vs Temperature vs Supply vs Time NOISE VOLTAGE fB = 0.01Hz to 10Hz fO = 10kHz DYNAMIC RESPONSE Small Signal Full Power BW Slew Rate Settling Time: 0.1% 0.01% 0.01% POWER SUPPLY Rated Voltage Range Quiescent Current TEMPERATURE RANGE Specification Operation Storage IO = +20mA, 5mA VO = 10V To Common Stable Operation Differential Common-Mode Differential Common-Mode TA = TMIN to TMAX RTI(4) 50 0.30 3dB VO = 20Vp-p VO = 10V Step VO = 10V Step VCM = 10V Step, VDIFF = 0V 15 1.10 V V/C V/V V/mo Vp-p nV/Hz MHz kHz V/s s s s V V mA C C C 10 +20, 5 CONDITIONS MIN TYP 10 0.0.0.01 +40/86 MAX UNITS V/V % ppm/C % V mA mA pF k k V V dB

0.025 0.001

VS = 6V to 18V RTI(5)
Derated Performance VO = 0V

+70 +85 +150

NOTES: (1) Connected as difference amplifier (see Figure 1). (2) Nonlinearity is the maximum peak deviation from the best-fit straight line as a percent of full-scale peakto-peak output. (3) With zero source impedance (see Maintaining CMR section). (4) Includes effects of amplifierss input bias and offset currents. (5) Includes effect of amplifiers input current noise and thermal noise contribution of resistor network.

SBOS152A

PIN CONFIGURATION

Top View DIP/SOIC

ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments 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.
Ref 1 10k In 2 10k +In 3 100k V 4 INA106 NOTE: (1) Pin 1 indentifier for SO-8 package. Model number identification may be abbreviated on SO-8 package due to limited available space. 5 Sense 6 Output 100k 7 V+ 8 NC

PACKAGE/ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.

ABSOLUTE MAXIMUM RATINGS

Power Supply Voltage... 18V Input Voltage Range... VS Operating Temperature Range: P, U.. 40C to +85C Storage Temperature Range.. 40C to +85C Lead Temperature (soldering, 10s): P.. +300C Wave Soldering (3s, max) U... +260C Output Short Circuit to Common... Continuous NOTE: (1) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.
TYPICAL PERFORMANCE CURVES
At TA = +25C, VS = 15V, unless otherwise noted.

STEP RESPONSE

SMALL SIGNAL RESPONSE (No Load)

Output Voltage (mV)

2s/div
SMALL SIGNAL RESPONSE (RLOAD = , CLOAD = 100pF) 1
TOTAL HARMONIC DISTORTION AND NOISE vs FREQUENCY A = 20dB, 3Vrms, 10k load

THD + N (%)

Inverting Noninverting 0.01
50 30kHz low-pass filtered 0.001 2s/div 1k 10k Frequency (Hz) 100k
MAXIMUM VOUT vs IOUT (Negative Swing) 17.12.5

VOUT (V) 17.5

MAXIMUM VOUT vs IOUT (Positive Swing)
VS = 18V VS = 15V VS = 12V

VOUT (V)

15 VS = 18V 12.5 VS = 15V 10 7.VS = 12V

10 7.2.0 2

VS = 5V

2.VS = 5V IOUT (mA) 36

6 IOUT (mA)
TYPICAL PERFORMANCE CURVES (CONT)

CMR vs FREQUENCY 110 140

POWER SUPPLY REJECTION vs FREQUENCY

PSRR (dB)

CMR (dB)

100 V 80

1k Frequency (Hz) 10k 100k
60 V+ 1k 10k 100k Frequency (Hz)

APPLICATIONS INFORMATION

Figure 1 shows the basic connections required for operation of the INA106. Power supply bypass capacitors should be connected close to the device pins as shown.
V 1F 4 INAR1 10k R2 100k 5
Ref terminal will be summed with the output signal. The source impedance of a signal applied to the Ref terminal should be less than 10 to maintain good common-mode rejection. Figure 2 shows a voltage applied to pin 1 to trim the offset voltage of the INA106. The known 100 source impedance of the trim circuit is compensated by the 10 resistor in series with pin 3 to maintain good CMR.

V+ 1F 7

INA106 R2

R3 10k

6 + R4 100k 1 VOUT = 10(V3 V2)
10 V3 Compensates for some impedance at pin 1. See text.
R4 +15V 1 499k 100k 100 15V
FIGURE 1. Basic Power Supply and Signal Connections. The differential input signal is connected to pins 2 and 3 as shown. The source impedance connected to the inputs must be equal to assure good common-mode rejection. A 5 mismatch in source impedance will degrade the commonmode rejection of a typical device to approximately 86dB. If the source has a known source impedance mismatch, an additional resistor in series with one input can be used to preserve good common-mode rejection. The output is referred to the output reference terminal (pin 1) which is normally grounded. A voltage applied to the
VO = V2 V3 Offset Adjustment Range = 3mV
FIGURE 2. Offset Adjustment. Referring to Figure 1, the CMR depends upon the match of the internal R4/R3 ratio to the R1/R2 ratio. A CMR of 106dB requires resistor matching of 0.005%. To maintain high CMR over temperature, the resistor TCR tracking must be better than 2ppm/C. These accuracies are difficult and expensive to reliably achieve with discrete components.

INA106 V10k 100k

E1 In 6 Gain Adjust E0

A1 R2 2

INA106 5

6 E0 Output 3 1

CMR Adjust A2 E2 +In
To eliminate adjustment interactions, first adjust gain with V2 grounded.
E0 = 10(1 + 2R2 /R1) (E2 E1)
FIGURE 3. Difference Amplifier with Gain and CMR Adjust.

INA106 10k V100k 5

To make a high performance high gain instrumentation amplifier, the INA106 can be combined with state-of-the-art op amps. For low source impedance applications, OPA37s will give the best noise, offset, and temperature drift. At source impedances above about 10k, the bias current noise of the OPA37 reacting with input impedance degrades noise. For these applications, use an OPA111 or a dual OPA2111 FET input op amp for lower noise. For an electrometer grade IA, use the OPA128see table below. Using the INA106 for the difference amplifier also extends the input commonmode range of the instrumentation amplifier to 10V. A conventional IA with a unity-gain difference amplifier has an input common-mode range limited to 5V for an output swing of 10V. This is because a unity-gain difference amp needs 5V at the input for 10V at the output, allowing only 5V additional for common-mode. A1, A2 OPA37A OPA111B OPA128LM R1 () 50.202 R2 (k) 2.10 GAIN (V/V) 1000 CMRR (dB) 118 Ib (pA) 0.075 NOISE AT 1kHz (nV/ Hz) 38

VO = 10V2 10k 100k

FIGURE 6. Precision Instrumentation Amplifier.
Gain Error = 0.01% maximum Nonlinearity = 0.001% maximum Gain Drift = 2.ppm/C

INAR2 100k 5

FIGURE 4. Precision G = 10 Inverting Amplifier.

INAR1 10k R2 100k 5

R4 100k R3 10k

V0 V0 = V1 + 10 V3

R4 100k

VO VO = VIN

FIGURE 7. Precision Summing Amplifier.

INA106 10k 100k

100V Safe Input 3
This circuit follows an 11/1 divider with a gain of 11 for an overall gain of unity. With an 11/1 divider, the input signal can exceed 100V without damage.
FIGURE 5. Voltage Follower with Input Protection.

100k 10k

VO VO = 11VIN
Gain Error = 0.01% maximum
FIGURE 8. Precision G = 11 Buffer. 6

PACKAGE OPTION ADDENDUM

16-Feb-2009

PACKAGING INFORMATION

Orderable Device INA106KP INA106KPG4 INA106U INA106U/2K5 INA106U/2K5G4 INA106UE4
Status (1) ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
Package Type PDIP PDIP SOIC SOIC SOIC SOIC
Package Drawing P P D D D D
Pins Package Eco Plan (2) Qty 75 Green (RoHS & no Sb/Br) Green (RoHS & no Sb/Br) Green (RoHS & no Sb/Br)
Lead/Ball Finish CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU CU NIPDAU
MSL Peak Temp (3) N / A for Pkg Type N / A for Pkg Type Level-3-260C-168 HR Level-3-260C-168 HR Level-3-260C-168 HR Level-3-260C-168 HR
2500 Green (RoHS & no Sb/Br) 2500 Green (RoHS & no Sb/Br) 75 Green (RoHS & no Sb/Br)
The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 1

PACKAGE MATERIALS INFORMATION

11-Mar-2008

TAPE AND REEL INFORMATION
*All dimensions are nominal

Device

Package Package Pins Type Drawing SOIC D 8

Reel Reel Diameter Width (mm) W1 (mm) 330.0 12.4

A0 (mm)

B0 (mm)

K0 (mm)

P1 (mm) 8.0
W Pin1 (mm) Quadrant 12.0 Q1

INA106U/2K5

Pack Materials-Page 1

Device INA106U/2K5

Package Type SOIC

Package Drawing D

Pins 8

SPQ 2500

Length (mm) 346.0

Width (mm) 346.0

Height (mm) 29.0

Pack Materials-Page 2

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