Amplifier and Data Converter Selection Guide

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28 Amplifiers ➔ Analog Current Shunt Monitors –16V to +80V, High-Side Current Shunt Monitors with Integrated Dual Comparators INA206, INA207, INA208 Get samples, datasheets, and app reports at: www.ti.com/sc/device/INA206, www.ti.com/sc/device/INA207 and www.ti.com/sc/device/INA208 Key Features • Extended common mode input range: –16V to +80V • Integrated dual open drain comparators • 1.2V reference • Low offset: 2mV • Rail-to-rail output voltage • Single supply: 2.7V to 18V • Packaging: MSOP, SO-14, TSSOP The INA206/207/208 feature dual comparators and 1.2V reference. These devices are ideal for multilevel watchdog systems, window comparators, or power good detection. Convenient default trip points are provided at each comparator of 0.6V, which can be overridden by external inputs if desired. One of the comparators has a latching capability, while the other comparator has a provision for a programmable delay by using a single external capacitor. The current shunt amplifiers of the INA206/207/208 feature a common-mode range of –16V to +80V independent of supply voltage, and are powered by single-supply voltages from +2.7V to +18V. The INA20x provides a fully buffered voltage output available in three gains: INA206 = 20; INA207 = 50; INA208 = 100. Applications • Notebook computers • Cell phones • Telecom equipment • Power management • Battery chargers C1 IN x20 V+ V OUT C1 OUT RESET 1.2V Reference V REF OUT C2 IN C2 OUT DELAY INA206 INA206/207/208 functional block diagram. *Expected Release Date 3Q 2006 Current Shunt Monitors Selection Guide Offset I Q Per Offset Drift CMRR BW Power Ch. (µV) (µV/ºC) (dB) (MHz) Output Voltage Supply (mA) Device Description Ch. Gain (max) (max) (typ) (typ) Swing (V) (min) (V) (max) Package Price * Voltage-Output, High-Side Current Shunt Monitors INA19x –16 to +80V CMV 1 20, 50, 100V/V 2000 1 100 0.5 V(+)–0.1 to (V-)+0.05 +2.7 to 18 0.9 SOT23-5 $0.80 INA20x Dual Comparator, V REF 1 20, 50, 100V/V 2000 1 100 0.5 V(+)–0.1 to (V-)+0.05 +2.7 to 18 0.9 SOT23-5 $0.80 Current-Output, High-Side Current Shunt Monitor INA138 36V (max) 1 200mA/V 1000 1 120 0.8 0 to (V+) –0.8 +2.7 to 36 0.045 SOT23-5 $0.95 INA168 60V (max) 1 200mA/V 1000 1 120 0.8 0 to (V+) –0.8 +2.7 to 60 0.045 SOT23-5 $1.25 INA139 High Speed, 40V (max) 1 1000mA/V 1000 1 100 0.44 0 to (V+) –1.2 +2.7 to 40 0.125 SOT23-5 $0.99 INA169 High Speed, 60V (max) 1 1000mA/V 1000 1 100 0.44 0 to (V+) –1.2 +2.7 to 60 0.125 SOT23-5 $1.25 Bidirectional Current Shunt Monitor INA170 60V (max) 1 1 to 100mA/V 1000 1 100 0.4 0 to V(+)–1.2 +2.7 to 40 0.125 VSSOP-8 $1.25 * Suggested resale price in U.S. dollars in quantities of 1,000. New products are listed in bold red. Preview products are listed in bold blue. Amplifier and Data Converter Selection Guide Texas Instruments 3Q 2006
The instrumentation amplifier (IA) is a high input impedance, closed-loop, fixed- or adjustable-gain block that allows for the amplification of low-level signals in the presence of common-mode errors and noise. TI offers many types of instrumentation amplifiers including single-supply, low-power, high-speed and low-noise devices. These instrumentation amplifiers are available in either the traditional three-op-amp or in the cost-effective two-op-amp topology. V IN R G 25kΩ A 3 V IN Over-Voltage Protection Over-Voltage Protection A 1 A 2 Amplifiers Instrumentation Amplifiers 60kΩ 60kΩ 60kΩ 60kΩ 50kΩ G = 1 + R G The three-op-amp topology is the benchmark for instrumentation amplifier performance. V O Ref 29 ➔ Three-Op-Amp Version The three-op-amp topology is the benchmark for instrumentation amplifier performance. These devices provide a wide gain range (down to G = 1) and generally offer the highest performance. Symmetrical inverting and non-inverting gain paths provide better common-mode rejection at high frequencies. Some types use current-feedback-type input op amps which maintain excellent bandwidth in high gain. Two-Op-Amp Version The two-op-amp topology can provide wider common-mode voltage range, especially in low-voltage, single-supply applications. Their simpler internal circuitry allows lower cost, lower quiescent current and smaller package sizes. This topology, however, does not lend itself to gains less than four (INA125) or five (all others). Ref VIN V IN 100kΩ 25kΩ V O = (V IN – V IN ) • G + V REF R G 25kΩ A 1 A 2 Single Supply V+ 100kΩ Two-op-amp topology provides wider common-mode range in low-voltage, single-supply applications. V O Dual Supply V– Design Considerations Supply voltage—TI has developed a series of low-voltage, single-supply, rail-to-rail instrumentation amps suitable for a wide variety of applications requiring maximum dynamic signal range. Gain requirement—for high-gain applications consider a low total noise device, because drift, input bias current and voltage offset all contribute to error. Common-mode voltage range—the voltage input range over which the amplifier can operate and the differential pair behaves as a linear amplifier for differential signals. Input bias current—can be an important factor in many applications, especially those sensing a low current or where the sensor impedance is very high. The INA116 requires only 3fA typical of input bias current. Offset voltage and drift—IAs are generally used in high-gain applications, where any amp errors are amplified by the circuit gain. This can become a significant portion of the overall signal unless V OS and drift are taken into account. Bipolar amps excel in limiting voltage errors related to offset and drift in low source impedance applications. Current-feedback vs. voltage-feedback input stage—appropriate for designers needing higher bandwidth or a more consistent 3dB rolloff frequency over various gain settings. The INA128 and INA129 provide a significantly higher 3dB rolloff frequency than voltage-feedback input stage instrumentation amps and have a 3dB rolloff at essentially the same frequency in both G = 1 and G = 10 configurations. Technical Information IAs output the difference accurately between the input signals providing Common-Mode Rejection (CMR). It is the key parameter and main purpose for using this type of device. CMR measures the device’s ability to reject signals that are common to both inputs. IAs are often used to amplify the differential output of a bridge sensor, amplifying the tiny bridge output signals while rejecting the large common-mode voltage. They provide excellent accuracy and performance, yet require minimal quiescent current. Gain is usually set with a single external resistor. In some applications unwanted common-mode signals may be less conspicuous. Real-world ground interconnections are not perfect. What may, at first, seem to be a viable single-ended amplifier application can become an accumulation of errors. Error voltages caused by currents flowing in ground loops sum with the desired input signal and are amplified by a single-ended input amp. Even very low impedance grounds can have induced voltages from stray magnetic fields. As accuracy requirements increase, it becomes more difficult to design accurate circuits with a single-ended input amplifier. The differential input instrumentation amplifier is the answer. Texas Instruments 3Q 2006 Amplifier and Data Converter Selection Guide
Page 1 and 2: Amplifier and Data Converter Select
Page 7 and 8: Amplifiers 7 Technology Primer Unde
Page 9 and 10: Amplifiers Precision Operational Am
Page 11 and 12: Amplifiers 11 Low-Noise Operational
Page 13 and 14: Amplifiers 13 Precision Operational
Page 15 and 16: Wideband, Low-Noise, Low-Distortion
Page 17 and 18: Amplifiers High-Speed Amplifiers 17
Page 19 and 20: Amplifiers 19 Video amplifiers—ca
Page 21 and 22: Video Amplifiers (sorted by ascendi
Page 23 and 24: Low-Power Comparators with Integrat
Page 25 and 26: Amplifiers Difference Amplifiers 25
Page 27: Amplifiers 27 Current shunt monitor
Page 31 and 32: Single-Supply Instrumentation Ampli
Page 33 and 34: Programmable gain instrumentation a
Page 35 and 36: 8-Channel Variable Gain Amplifier V
Page 37 and 38: Amplifiers Audio Amplifiers 37 ➔
Page 39 and 40: Amplifiers Audio Power Amplifiers 3
Page 41 and 42: Amplifiers 41 TI power amplifiers s
Page 43 and 44: Amplifiers 43 TI’s pulse width mo
Page 45 and 46: Amplifiers 45 Industrial Analog Vol
Page 47 and 48: Amplifiers Integrating Amplifiers 4
Page 49 and 50: Amplifiers 49 Data acquisition syst
Page 51 and 52: ADCs by Architecture 51 Delta-sigma
Page 53 and 54: 16-Bit, 10MSPS, Very Wide Bandwidth
Page 55 and 56: ADCs by Architecture Intelligent AD
Page 57 and 58: ADCs by Architecture 57 Successive-
Page 59 and 60: ADCs by Architecture 59 18-Bit, 1MS
Page 61 and 62: ADCs by Architecture SAR ADCs (Cont
Page 63 and 64: ADCs by Architecture 63 Analog-to-d
Page 65 and 66: 14-Bit, 170MSPS/190MSPS ADCs with L
Page 67 and 68: ADCs by Architecture 67 Pipeline AD
Page 69 and 70: 16-Bit, Ultra-Low Power, Voltage-Ou
Page 71 and 72: DACs by Architecture 71 High-Precis
Page 73 and 74: DACs by Architecture 73 High-Precis
Page 75 and 76: Low-Noise, 16-Bit, 500MSPS Dual DAC
Page 77 and 78: 1-Bit, 10MHz, 2nd-Order, Delta-Sigm
Page 79 and 80:
Analog Monitoring and Control 79 Th
Page 81 and 82:
7ppm/°C Precision Series Voltage R
Page 83 and 84:
World’s Smallest Digital Temperat
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High Reliability Products 85 The Te
Page 87 and 88:
Quick Reference Selection Table 87
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Quick Reference Audio Selection Tab
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Design and Evaluation Tools 101 SPI
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Design and Evaluation Tools 103 Sof
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Design and Evaluation Tools Data Co
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Page 111 and 112:
Device Index 111 ➔ ACF2101 ......
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Device Index 113 ➔ PCM1800 ......
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TI Worldwide Technical Support Inte
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Amplifier and Data Converter Selection Guide

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