tc9400 Microchip Technology Inc., tc9400 Datasheet
tc9400
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tc9400 Summary of contents
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... FM Demodulation © 2007 Microchip Technology Inc. TC9400/9401/9402 General Description: The TC9400/9401/9402 are low-cost Voltage-to-Fre- quency (V/F) converters, utilizing low-power CMOS technology. The converters accept a variable analog input signal and generate an output pulse train, whose frequency is linearly proportional to the input voltage. ...
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... TC9400/9401/9402 Functional Block Diagram Integrator Integrator Capacitor Op Amp R IN Input Voltage I IN Reference Capacitor I REF Reference Voltage DS21483D-page 2 Threshold One Detector Shot ÷ 2 TC9400 © 2007 Microchip Technology Inc. Pulse Output Pulse/2 Output ...
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... L 10: Full temperature range -0.1V. IN © 2007 Microchip Technology Inc. TC9400/9401/9402 † Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied ...
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... Parameter Min Typ Max Analog Input I Full Scale — 10 — Over Range — — Response Time — 2 — Digital Section TC9400 10mA — 0.2 0.4 SAT OL V – V — — 18 OUT OUT MAX Common (Note 4) Pulse Frequency — 3 — Output Width ...
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... R F ≥ 2 kΩ, tested @ 10 kΩ 10: Full temperature range -0.1V. IN © 2007 Microchip Technology Inc. TC9400/9401/9402 = +5V -5V 0V GND Min Typ Max Min Typ Max 0.4 — ...
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... DS21483D-page 6 Table 2-1. Description This pin sets bias current in the TC9400. Connect to V Low frequency adjustment input. Input current connection for the V/F converter. Negative power supply voltage connection, typically -5V. Reference capacitor connection. Analog ground. ...
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... F/V mode, the input frequency is applied to this input. The nominal threshold of the detector is half way between the power supplies mV. The TC9400’s charge balancing V/F technique is not dependent on a precision comparator threshold, because the threshold only sets the lower limit of the op SS amp output. The op amp’ ...
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... TC9400/9401/9402 3.0 DETAILED DESCRIPTION 3.1 Voltage-to-Frequency (V/F) Circuit Description The TC9400 V/F converter operates on the principal of charge balancing. The operation of the TC9400 is easily understood by referring to Figure voltage ( converted to a current (I IN resistor. This current is then converted to a charge on the integrating capacitor and shows linearly decreasing voltage at the output of the op amp ...
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... Voltage-to-Time Measurements The TC9400 output can be measured in the time domain as well as the frequency domain. Some micro- computers, for example, have extensive timing capabil- ity, but limited counter capability. Also, the response time of a time domain measurement is only the period between two output pulses, while the frequency measurement must accumulate pulses during the entire counter time-base period ...
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... Improved Single Supply V/F Converter Operation A TC9400, which operates from a single 12 to 15V variable power source, is shown in circuit uses two Zener diodes to set stable biasing levels for the TC9400. The Zener diodes also provide the reference voltage, so the output impedance and temperature coefficient of the Zeners will directly affect power supply rejection and temperature performance ...
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... Trimming the reference voltage is not recommended for high accuracy applications unless an op amp is used as a buffer, because the TC9400 requires a low- impedance reference (see Section 2.5 “Voltage Ref- erence (VREF)”, V pin description, for more infor- REF mation 910 kΩ 100 kΩ ...
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... MΩ 0V–10V 10V 1 MΩ 12V 1.4 MΩ 15V 2 MΩ FIGURE 4-3: Fixed Voltage – Single Supply Operation. DS21483D-page 15V (Fixed 0.01 TC9400 µ REF 11 0.01 µ 180 100 kΩ R ----------------------------------------- - ...
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... FREQUENCY-TO-VOLTAGE (F/V) CIRCUIT DESCRIPTION When used as an F/V converter, the TC9400 generates an output voltage linearly proportional to the input frequency waveform. Each zero crossing at the threshold detector’s input causes a precise amount of charge ( dispensed into the op amp’s summing junction. This charge, in turn, flows through the feedback resistor, generating voltage pulses at the output of the op amp ...
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... INT C can be increased to lower the ripple. Values of INT 1 µF to 100 µF are perfectly acceptable for low frequen- cies. When the TC9400 is used in the Single Supply mode defined as the voltage difference between Pin 7 REF and Pin 2. 0.01 µF 33 kΩ ...
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... F 0.5 ms Min Input F OUT F OUT FIGURE 6-3: F/V Digital Outputs. © 2007 Microchip Technology Inc. TC9400/9401/9402 V+ = 10V to 15V GND .01 µF TC9400 10 kΩ V REF 2 Zero Adjust V+ 1.0 kΩ 11 DET IN914 I V 1.0 BIAS REF MΩ 7 0.1 µF 1.0 kΩ ...
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... Output Filtering The output of the TC9400 has a sawtooth ripple super- imposed level. The ripple will be rejected if the TC9400 output is converted to a digital value by an integrating Analog-to-Digital Converter, such as the TC7107. The ripple can also be reduced by increasing the value of the integrating capacitor, although this will reduce the response time of the F/V converter ...
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... Microchip Technology Inc. TC9400/9401/9402 In some cases, however, the TC9400 output must be zero at power-on without a frequency input. In such cases, a capacitor connected from Pin usually be sufficient to pulse the TC9400 and provide a Power-on Reset (see predictable power-on operation is critical, a more complicated circuit, such as required. ...
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... DS21483D-page 18 Example: (Front View) TC9400EJD 0731256 Example: (Back View) Y2026 Example: (Front View) TC9400 ^^ CPD e 3 0731256 Example: (Back View) Y2026 Example: (Front View) TC9400 ^^ e EOD 3 0731256 Example: (Back View) Y2026 ) e 3 © 2007 Microchip Technology Inc. ...
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... Notes: 1. Pin 1 visual index feature may vary, but must be located within the hatched area. 2. § Significant Characteristic. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. © 2007 Microchip Technology Inc. TC9400/9401/9402 Units ...
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... TC9400/9401/9402 14-Lead Plastic Dual In-Line (PD) – 300 mil Body [PDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane ...
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... Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. © 2007 Microchip Technology Inc. TC9400/9401/9402 ...
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... TC9400/9401/9402 NOTES: DS21483D-page 22 © 2007 Microchip Technology Inc. ...
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... The following is the list of modifications: 1. Corrected Figure 6-1. 2. Added History section. 3. Updated package marking information and package outline drawings 4. Added Product identification System section. Revision C (May 2006) Revision B (May 2002) Revision A (April 2002) • Original Release of this Document. © 2007 Microchip Technology Inc. TC9400/9401/9402 DS21483D-page 23 ...
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... TC9400/9401/9402 NOTES: DS21483D-page 24 © 2007 Microchip Technology Inc. ...
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... Tape and Reel. © 2007 Microchip Technology Inc. TC9400/9401/9402 . Examples: a) TC9400COD: 0°C to +70°C, 14LD SOIC package. b) TC9400COD713:0°C to +70°C, 14LD SOIC package, Tape and Reel c) TC9400CPD: 0°C to +70°C, 14LD PDIP package. d) TC9400EJD: -40°C to +85°C, 14LD PDIP package. ...
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... TC9400/9401/9402 NOTES: DS21483D-page 26 © 2007 Microchip Technology Inc. ...
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... Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. © 2007 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...
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... Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2007 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris ...