INA106UG4

INA106 INA INA 10 6 106 SBOS152A – AUGUST 1987 – REVISED OCTOBER 2003 Precision Gain = 10 DIFFERENTIAL AMPLIFIER FEATURES ● ● ● ● ● APPLICATIONS 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 ● ● ● ● ● 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. –In 2 R1 10kΩ R2 100kΩ 5 7 6 4 +In 3 R3 10kΩ R4 100kΩ 1 Sense V+ Output 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. Copyright © 1987-2003, Texas Instruments Incorporated 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. www.ti.com SPECIFICATIONS ELECTRICAL At +25°C, VS = ±15V, unless otherwise specified. INA106KP, U PARAMETER CONDITIONS MIN 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 TYP 10 0.01 –4 0.0002 IO = +20mA, –5mA VO = 10V 10 +20, –5 MAX 0.025 0.001 12 Differential Common-Mode Differential Common-Mode TA = TMIN to TMAX 10 110 ±1 ±11 86 V/V % ppm/°C % V mA Ω mA pF 0.01 +40/–10 1000 To Common Stable Operation UNITS kΩ kΩ V V dB 100 RTI(4) 50 0.2 1 10 ±VS = 6V to 18V 200 10 µV µV/°C µV/V µV/mo RTI(5) –3dB VO = 20Vp-p 30 2 VO = 10V Step VO = 10V Step VCM = 10V Step, VDIFF = 0V Derated Performance VO = 0V TEMPERATURE RANGE Specification Operation Storage ±5 0 –40 –65 1 30 µVp-p nV/√Hz 5 50 3 5 10 5 MHz kHz V/µs µs µs µs ±15 ±1.5 ±18 ±2 V V mA +70 +85 +150 °C °C °C 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 amplifiers’s input bias and offset currents. (5) Includes effect of amplifier’s input current noise and thermal noise contribution of resistor network. 2 INA106 www.ti.com SBOS152A PIN CONFIGURATION Top View ELECTROSTATIC DISCHARGE SENSITIVITY DIP/SOIC 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. • (1) Ref 1 –In 2 +In 3 V– 4 10kΩ 8 NC 7 V+ 6 Output 5 Sense 100kΩ 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. 10kΩ 100kΩ 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. 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 ................................ –40°C to +85°C Storage Temperature Range ............................................ –40°C to +85°C Lead Temperature (soldering, 10s): P .......................................... +300°C Wave Soldering (3s, max) U .......................................................... +260°C 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. INA106 SBOS152A www.ti.com 3 TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = ±15V, unless otherwise noted. SMALL SIGNAL RESPONSE (No Load) STEP RESPONSE Output Voltage (mV) 50 0 –50 2µs/div 2µs/div TOTAL HARMONIC DISTORTION AND NOISE vs FREQUENCY SMALL SIGNAL RESPONSE (RLOAD = ∞, CLOAD = 100pF) 1 A = 20dB, 3Vrms, 10kΩ load THD + N (%) Output Voltage (mV) 50 0 0.1 Inverting Noninverting 0.01 –50 30kHz low-pass filtered 0.001 1k 2µs/div 10k 100k Frequency (Hz) MAXIMUM VOUT vs IOUT (Negative Swing) MAXIMUM VOUT vs IOUT (Positive Swing) –17.5 17.5 VS = ±18V –15 15 VS = ±15V –10 VS = ±12V 12.5 VOUT (V) VOUT (V) VS = ±18V –12.5 –7.5 –5 VS = ±12V 7.5 5 VS = ±5V –2.5 2.5 0 VS = ±5V 0 0 –2 –4 –6 –8 –10 –12 0 –IOUT (mA) 4 VS = ±15V 10 6 12 18 24 30 36 IOUT (mA) INA106 www.ti.com SBOS152A TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = ±15V, unless otherwise noted. POWER SUPPLY REJECTION vs FREQUENCY 110 140 100 120 PSRR (dB) CMR (dB) CMR vs FREQUENCY 90 80 70 100 V– 80 60 V+ 60 40 10 100 1k 10k 100k 1 10 Frequency (Hz) 100 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– V+ 1µF Figure 2 shows a voltage applied to pin 1 to trim the offset voltage of the INA106. The known 100Ω source impedance of the trim circuit is compensated by the 10Ω resistor in series with pin 3 to maintain good CMR. 1µF 4 7 INA106 V2 2 R2 100kΩ R1 10kΩ Ref terminal will be summed with the output signal. The source impedance of a signal applied to the Ref terminal should be less than 10Ω to maintain good common-mode rejection. 5 INA106 R1 V3 3 R3 10kΩ 6 + – R2 2 V2 5 VOUT = 10(V3 –V2) 10Ω R4 100kΩ V3 1 3 6 R3 Compensates for some impedance at pin 1. See text. R4 +15V 1 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 5Ω 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 100kΩ 100Ω –15V 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 SBOS152A 499kΩ VO = V2 – V3 Offset Adjustment Range = ±3mV FIGURE 1. Basic Power Supply and Signal Connections. VO www.ti.com 5 INA106 V1 10Ω 10kΩ 2 E1 –In 100kΩ 5 A1 E0 6 2 R2 Gain Adjust 200Ω INA106 5 6 R1 E0 Output R2 V2 10Ω 10kΩ 3 100kΩ 1 200Ω INA106 10kΩ E0 = 10(1 + 2R2 /R1) (E2 – E1) E2 +In FIGURE 3. Difference Amplifier with Gain and CMR Adjust. 100kΩ 2 5 6 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 10kΩ, 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 OPA128—see 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. VO VO = –10V2 10kΩ 100kΩ 3 1 A2 To eliminate adjustment interactions, first adjust gain with V2 grounded. V2 3 CMR Adjust 1 A1, A2 R1 (Ω) R2 (kΩ) GAIN (V/V) CMRR (dB) Ib (pA) NOISE AT 1kHz (nV/ √Hz) OPA37A OPA111B OPA128LM 50.5 202 202 2.5 10 10 1000 1000 1000 128 110 118 40000 1 0.075 4 10 38 FIGURE 6. Precision Instrumentation Amplifier. Gain Error = 0.01% maximum Nonlinearity = 0.001% maximum Gain Drift = 2.ppm/°C INA106 FIGURE 4. Precision G = –10 Inverting Amplifier. 2 INA106 2 R2 100kΩ R1 10kΩ V1 1 R4 100kΩ 1 5 V0 6 V0 = V1 + 10 V3 6 R3 10kΩ 3 VO FIGURE 7. Precision Summing Amplifier. VO = VIN ±100V Safe Input R2 100kΩ R4 100kΩ 5 V3 VIN R1 10kΩ R3 10kΩ INA106 3 2 10kΩ 100kΩ 5 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. 1 VIN 3 100kΩ 10kΩ 6 VO VO = 11VIN Gain Error = 0.01% maximum FIGURE 8. Precision G = 11 Buffer. 6 INA106 www.ti.com SBOS152A PACKAGE OPTION ADDENDUM www.ti.com 21-Sep-2022 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) Samples (4/5) (6) INA106KP ACTIVE PDIP P 8 50 RoHS & Green NIPDAU N / A for Pkg Type INA106U ACTIVE SOIC D 8 75 RoHS & Green NIPDAU INA106U/2K5 ACTIVE SOIC D 8 2500 RoHS & Green INA106UE4 ACTIVE SOIC D 8 75 RoHS & Green -40 to 85 INA106KP Samples Level-3-260C-168 HR INA 106U Samples NIPDAU Level-3-260C-168 HR INA 106U Samples NIPDAU Level-3-260C-168 HR INA 106U Samples (1) 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. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of