Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp, differential amplifier Differential PDIP 8

1985 Burr-Brown Corporation PDS-617G Printed in U.S.A. August, 1993

Precision Unity Gain

DIFFERENTIAL AMPLIFIER

INA105

DESCRIPTION

The INA105 is a monolithic Gain = 1 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 INA105 provides this

precision circuit function without using an expensive

precision resistor network. The INA105 is available in

8-pin plastic DIP, SO-8 surface-mount and TO-99

metal packages.

Sense

V+

Output

V–

Ref

–In

+In

25kΩ 25kΩ

25kΩ25kΩ

FEATURES

● CMR 86dB min OVER TEMPERATURE

● GAIN ERROR: 0.01% max

● NONLINEARITY: 0.001% max

● NO EXTERNAL ADJUSTMENTS

REQUIRED

● EASY TO USE

● COMPLETE SOLUTION

● HIGHLY VERSATILE

● LOW COST

● PLASTIC DIP, TO-99 HERMETIC METAL,

AND SO-8 SOIC PACKAGES

APPLICATIONS

● DIFFERENTIAL AMPLIFIER

● INSTRUMENTATION AMPLIFIER

BUILDING BLOCK

● UNITY-GAIN INVERTING AMPLIFIER

● GAIN-OF-1/2 AMPLIFIER

● NONINVERTING GAIN-OF-2 AMPLIFIER

● AVERAGE VALUE AMPLIFIER

● ABSOLUTE VALUE AMPLIFIER

● SUMMING AMPLIFIER

● SYNCHRONOUS DEMODULATOR

● CURRENT RECEIVER WITH COMPLIANCE

TO RAILS

● 4mA TO 20mA TRANSMITTER

● VOLTAGE-CONTROLLED CURRENT

SOURCE

● ALL-PASS FILTERS

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

SBOS145

Summary of content (17 pages)

PAGE 1
® INA105 Precision Unity Gain DIFFERENTIAL AMPLIFIER FEATURES APPLICATIONS ● CMR 86dB min OVER TEMPERATURE ● DIFFERENTIAL AMPLIFIER ● GAIN ERROR: 0.01% max ● NONLINEARITY: 0.
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SPECIFICATIONS ELECTRICAL At +25°C, VCC = ±15V, unless otherwise noted. INA105AM PARAMETER CONDITIONS MIN GAIN Initial(1) Error vs Temperature Nonlinearity(2) OUTPUT Rated Voltage Rated Current Impedance Current Limit Capacitive Load IO = +20mA, –5mA VO = 10V To Common Stable Operation INPUT Impedance(3) Differential Common-Mode Differential Common-Mode TA = TMIN to TMAX Voltage Range(4) Common-Mode 10 +20, –5 Rejection(5) TYP MAX 1 0.005 1 0.0002 0.01 5 0.
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PIN CONFIGURATIONS Top View TO-99 Tab Top View DIP/SOIC No Internal Connection 8 Ref 1 V+ 7 Ref 1 8 No Internal Connection (1) –In 2 6 3 –In 2 7 V+ +In 3 6 Output V– 4 5 Sense Output 5 Sense +In 4 INA105AM INA105BM V– Case internally connected to V–. Make no connection. NOTE: (1) Performance grade identifier box for small outline surface mount. Blank indicates K grade. Part is marked INA105U. ABSOLUTE MAXIMUM RATINGS ELECTROSTATIC DISCHARGE SENSITIVITY Supply ..........
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TYPICAL PERFORMANCE CURVES At TA = 25°C, VS = ±15V, unless otherwise noted. SMALL SIGNAL RESPONSE (No Load) Output Voltage (V) –10 to +10 Output Voltage (mV) STEP RESPONSE 0 4 8 12 +50 0 –50 0 16 5 10 Time (µs) Time (µs) MAXIMUM VOUT vs IOUT (Negative Swing) SMALL SIGNAL RESPONSE (RLOAD = ∞ Ω, CLOAD = 1000pF) –17.5 VS = ±18V +50 VOUT (V) Output Voltage (mV) –15 0 –12.5 VS = ±15V –10 VS = ±12V –7.5 –5 –50 VS = ±5V –2.
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TYPICAL PERFORMANCE CURVES (CONT) At TA = 25°C, VS = ±15V, unless otherwise noted. COMMON-MODE INPUT RANGE vs SUPPLY (Difference Amplifier Connected, VOUT = 0) 140 36 120 30 Input Range (V) PSRR (dB) POWER SUPPLY REJECTION vs FREQUENCY 100 V– 80 60 V+ 10 100 1k Frequency (Hz) Negative CMV 18 Positive CMV 12 6 40 1 24 10k 0 100k ±6 ±3 APPLICATION INFORMATION ±9 ±12 ±15 Supply Voltage (V) ±21 V+ V– Figure 1 shows the basic connections required for operation of the INA105.
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V1 INA105 R1 2 V2 –In R2 INA105 A1 5 6 5 2 R2 VO 6 R1 10Ω V3 V0 0utput R2 R3 3 1 3 R4 +15V 499kΩ VO = (1 + 2R2/R1) (V2 –V1) 100kΩ For low source impedance applications, an input stage using OPA27 op amps will give the best low noise, offset, and temperature drift performance. At source impedances above about 10kΩ, the bias current noise of the OPA27 reacting with the input impedance begins to dominate the noise performance.
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INA105 INA105 2 2 V2 5 5 6 V0 6 V0 1 V1 3 V0 = V1 Gain Error = 0.001% maximum 1 3 V0 = – V2 Gain Error = 0.01% maximum Nonlinearity = 0.001% maximum Gain Drift = 2ppm/°C FIGURE 9. Precision Unity-Gain Buffer. V+ V+ 3 FIGURE 6. Precision Unity-Gain Inverting Amplifier. INA105 2 +15V 2 5 +10V Out 6 REF10 6 INA105 2 7 5 (V+)/2 –10V Out 4 6 1 1 Common 3 4 Common FIGURE 10. Pseudoground Generator. FIGURE 7. ±10V Precision Voltage Reference.
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INA105 INA105 2 0 to +10V Output ±2ppm/°C 5 2 5 6 1 V0 Output 6 (1) 1 V1 –10V to +10V Input 3 Device VFC320 VFC100 DAC80 DAC703 XTR110 3 V 0 = 2 • V1 Gain Error = 0.01% maximum Gain Drift = 2ppm/°C 2 FIGURE 12. Precision (G = 2) Amplifier. Output 0-10kHz 0-FCLOCK/2 0-FS (12 bits) 0-FS (16 bits) 4-20mA 6 REF10 10V INA105 4 NOTE: (1) Unipolar Input Device. 2 5 FIGURE 15. Precision Bipolar Offsetting. 6 V1 V3 1 V0 R1 3 R2 2 5 INA105 V0 = V1 + V3, ±0.01% maximum FIGURE 13.
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Offset Adjust 6 7 8 Noise (60Hz hum) INA101AG 3 A1 4 Transducer or Analog Signal 10kΩ 5 20kΩ 10kΩ A3 RG 1 10 20kΩ Output 10kΩ 11 A2 10kΩ 12 Noise (60Hz hum) 100kΩ Shield 2 +VCC 13 –VCC 9 14 Common 3 INA105 2 5 6 1 FIGURE 17. Instrumentation Amplifier Guard Drive Generator. INA105 2 5 INA105 2 6 V1 V2 5 3 6 1 3 V3 V0 = V3 + V4 – V1 – V2 V4 V0 1 FIGURE 18. Precision Summing Instrumentation Amplifier.
PAGE 10
INA105 INA105 5 2 V2 R 2 5 6 R V1 6 V1 1 3 1 3 IO = (V1 – V2) (1/25k + 1/R) For R ≅ 200 Ω, Figure 24 will provide superior performance. Load V01 IO V2 FIGURE 19. Precision Voltage-to-Current Converter with Differential Inputs. INA105 2 5 INA105 V2 6 V02 5 2 1 3 6 R V3 V01 – V02 = 2 (V2 – V1) 3 1 FIGURE 22. Differential Output Difference Amplifier. IO = (V3 – V2)/R IO Load V2 2 INA105 FIGURE 20. Differential Input Voltage-to-Current Converter for Low IOUT.
PAGE 11
Window Center–Window Span 2 5 Window Span 0 to +5V 6 1 3 INA105 2 Window Center ±10V 4115 3 9 Window Comparator 7 2 VIN 5 10 5 Lower Limit Upper Limit HI GO LO 8 6 3 INA105 1 Window Center + Window Span FIGURE 24. Window Comparator with Window Span and Window Center Inputs. –In V1 INA105 (1) V+ R2 2 5 R1 R 6 R2 3 1kΩ R 1 +In (1) V2 Load IO IO = (E2 – E1) (1 +2R2/R1) (1/25k + 1/R) NOTE: (1) See Figure 5 for op amp recommendation. FIGURE 25.
PAGE 12
INA105 R2 V1 2 R2 A1 5 R1 49.5Ω 6 R1 V0 = 200 (V2 – V1) 1 A3 R1 49.5Ω 3 R2 R2 A2 V2 Conventional Instrumentation Amplifier (e.g., INA101 or INA102) A = 100 INA105 A=2 FIGURE 27. Boosting Instrumentation Amplifier Common-Mode Range From ±5 to ±7.5V with 10V Full-Scale Output. INA105 R1 2 D1 5 10pF D2 OPA111 6 R3 3 V1 Input R2 V0 = |V1| R4 1 R5 2kΩ FIGURE 28. Precision Absolute Value Buffer. 0 to 10V In 12.5kΩ 1kΩ 50kΩ INA105 OPA27 +15V 2 5 2 50.1Ω 6 REF10 6 10V 50.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 24-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device INA105KU/2K5 Package Package Pins Type Drawing SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 6.4 B0 (mm) K0 (mm) P1 (mm) 5.2 2.1 8.0 W Pin1 (mm) Quadrant 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) INA105KU/2K5 SOIC D 8 2500 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.