"Chapter 1 - The Op Amp's Place in the World" - HTL Wien 10

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Practical Design Hints 16-54 f T 100· 10 kHz 0.618 1.5 MHz 1.62 2 0.5 1.62 2 0.25 Besides good dc performance, low noise, and low signal distortion, another important parameter that determines the speed of an op amp is the slew rate (SR). For adequate fullpower response, the slew rate must be greater than: SR ·V PP ·f C For example, a single-supply, 100-kHz filter with 5 V PP output requires a slew rate of at least: SR ·5V·100 kHz 1.57 V s Texas Instruments offers a wide range of op amps for high-performance filters in single supply applications. Table 16–3 provides a selection of single-supply amplifiers sorted in order of rising slew rate. Table 16–3. Single-Supply Op Amp Selection Guide (T A = 25°C, V CC = 5 V) OP AMP BW (MHz) FPR (kHz) SR (V/µs) VIO (mV) Noise (nV/√Hz) TLV2721 0.51 11 0.18 0.6 20 TLC2201A 1.8 159 2.5 0.6 8 TLV2771A 4.8 572 9 1.9 21 TLC071 10 1000 16 1.5 7 TLE2141 5.9 2800 45 0.5 10.5 THS4001 270 127 MHz (1VPP) 400 6 7.5
16.9 Filter Coefficient Tables Active Filter Design Techniques Filter Coefficient Tables The following tables contain the coefficients for the three filter types, Bessel, Butterworth and Tschebyscheff. The Tschebyscheff tables (Table 16–9) are split into categories for the following passband ripples: 0.5 dB, 1 dB, 2 dB, and 3 dB. The table headers consist of the following quantities: n is the filter order i is the number of the partial filter. ai, bi are the filter coefficients. ki is the ratio of the corner frequency of a partial filter, fCi , to the corner frequency of the overall filter, fC. This ratio is used to determine the unity-gain bandwidth of the op amp, as well as to simplify the test of a filter design by measuring fCi and comparing it to fC. Qi is the quality factor of the partial filter. fi / fC this ratio is used for test purposes of the allpass filters, where fi is the frequency, at which the phase is 180° for a second-order filter, respectively 90° for a first-order all-pass. Tgr0 is the normalized group delay of the overall all-pass filter. 16-55
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Operational Amplifier Chapter 1: Th
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1-2 problem. It seems that circuits
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1-4 you are looking in the wrong pl
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Laws of Physics 2-2 V IR (2-1) In
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Current Divider Rule 2-4 put voltag
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Thevenin’s Theorem 2-6 V theorem
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Superposition 2.6 Superposition 2-8
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Transistor Amplifier 2-10 I C I B
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Transistor Amplifier 2-12 approxima
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Ideal Op Amp Assumptions 3-2 a hard
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The Inverting Op Amp 3-4 in a curre
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The Differential Amplifier 3.5 The
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Complex Feedback Networks 3-8 Break
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Capacitors Figure 3-10. Low-Pass Fi
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3-12
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Single Supply versus Dual Supply 4-
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Circuit Analysis 4-4 VREF VIN Figur
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Circuit Analysis 4-6 Four op amps w
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Simultaneous Equations 4.3 Simultan
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Simultaneous Equations 4-10 VOUT V
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Simultaneous Equations 4-12 VIN = 0
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Simultaneous Equations 4-14 m R F
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Simultaneous Equations 4.3.3 Case 3
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Simultaneous Equations 4-18 - Input
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Simultaneous Equations 4-20 |b| V
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Summary 4.4 Summary 4-22 Single-sup
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Block Diagram Math and Manipulation
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Block Diagram Math and Manipulation
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Feedback Equation and Stability 5.3
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Bode Analysis of Feedback Circuits
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Bode Analysis of Feedback Circuits
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Loop Gain Plots are the Key to Unde
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Loop Gain Plots are the Key to Unde
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References 5-16 M tangent 1 (2) (
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Review of the Canonical Equations 6
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Review of the Canonical Equations 6
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Inverting Op Amps 6-6 comparison al
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Differential Op Amps 6.5 Differenti
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6-10
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Internal Compensation 7-2 around in
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Internal Compensation 7-4 Damping R
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Internal Compensation AVD - Large-S
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External Compensation, Stability, a
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Dominant-Pole Compensation 7-10 VTH
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Gain Compensation 7-12 VOUT VIN a
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Lead Compensation 7-14 transfer fun
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Compensated Attenuator Applied to O
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Lead-Lag Compensation 7-18 FHASE (A
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Comparison of Compensation Schemes
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7-22
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Development of the Stability Equati
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The Noninverting CFA Figure 8-4. No
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The Inverting CFA 8-6 The current e
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Stability Analysis 8-8 The plot in
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Selection of the Feedback Resistor
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Stability and Feedback Capacitance
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Summary 8.11 Summary 8-14 A Z1 R
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Precision 9.2 Precision 9-2 The lon
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Bandwidth 9-4 A aR G R F R G (9-2
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Stability 9.4 Stability 9-6 Substit
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Equation Comparison 9-8 R G = 100
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9-10
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Characterization 10-2 Noise Signal
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Types of Noise 10.2.5 Noise Units 1
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Types of Noise 10-6 Shot noise is
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Types of Noise 10-8 Ith 4kTB R Wh
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Noise Colors Figure 10-4. Avalanche
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Op Amp Noise 10.4.3 Red/Brown Noise
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Op Amp Noise 10-14 E n Square it.
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Op Amp Noise 10.5.4 Inverting Op Am
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Op Amp Noise 10.5.6 Differential Op
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Putting It All Together 10-20 Vn Vn
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Putting It All Together 10-22 volta
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10-24
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Operational Amplifier Parameter Glo
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Additional Parameter Information 11
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12-2 The ADC selection is based on
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12-4 (A) 4 V 3 V ADC 0 V Sensor Out
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12.2 Transducer Types 12-6 This is
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12-8 some value, and R X is switche
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12-10 Resolvers and synchros are po
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12-12 6) Scan the transducer and AD
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12-14 the worst case excursions of
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Table 12-3. Op Amp Selection 12-16
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12-18 this yields m = 16.16. The re
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12-20 0.97R 1 VREF(MIN) VREF 50 m
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12-22 ply contribution is reduced b
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12-24
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Wireless Systems 13-2 Signal @ - 10
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Wireless Systems 13-4 900 MHz Figur
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Selection of ADCs/DACs 13.3 Selecti
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Selection of ADCs/DACs 13-8 Therefo
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Factors Influencing the Choice of O
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Anti-Aliasing Filters 13-12 anti-al
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Communication D/A Converter Reconst
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External Vref Circuits for ADCs/DAC
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High-Speed Analog Input Drive Circu
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High-Speed Analog Input Drive Circu
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References 13.9 References 13-22 [1
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Understanding the D/A Converter and
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Understanding the D/A Converter and
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D/A Converter Error Budget 14-6 rat
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D/A Converter Error Budget 14-8 The
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D/A Converter Errors and Parameters
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Compensating For DAC Capacitance 14
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Increasing Op Amp Buffer Amplifier
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Increasing Op Amp Buffer Amplifier
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14-24
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Requirements for Oscillation 15-2 u
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Gain in the Oscillator 15-4 The fre
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Active Element (Op Amp) Impact on t
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Analysis of the Oscillator Operatio
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Sine Wave Oscillator Circuits 15-10
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References 15.8 References 15-22 [1
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Fundamentals of Low-Pass Filters 16
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Page 304 and 305: All-Pass Filter Design 16-42 2 i
Page 306 and 307: All-Pass Filter Design 16.7.1 First
Page 308 and 309: All-Pass Filter Design 16-46 V IN f
Page 310 and 311: Practical Design Hints 16-48 low-pa
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Page 318 and 319: Filter Coefficient Tables Table 16-
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Page 328 and 329: General Considerations 17.1.3 Noise
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Input Common-Mode Range 18-10 V µ
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Shutdown and Low Current Drain 18-1
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Transducer to ADC Analog Interface
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DAC to Actuator Analog Interface 18
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DAC to Actuator Analog Interface 18
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Comparison of Op Amps 18-20 When DA
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Summary 18.11 Summary 18-22 Always
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"Chapter 1 - The Op Amp's Place in the World" - HTL Wien 10

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