データシートサーチシステム |
|
TC9401CPD データシート(PDF) 8 Page - TelCom Semiconductor, Inc |
|
TC9401CPD データシート(HTML) 8 Page - TelCom Semiconductor, Inc |
8 / 13 page 3-294 TELCOM SEMICONDUCTOR, INC. VOLTAGE-TO-FREQUENCY/ FREQUENCY-TO-VOLTAGE CONVERTERS TC9400 TC9401 TC9402 CREF The exact value is not critical and may be used to trim the full-scale frequency (see "Input/Output Relationships"). Glass film or air trimmer capacitors are recommended because of their stability and low leakage. Locate as close as possible to pins 5 and 3. VDD, VSS Power supplies of ±5V are recommended. For high- accuracy requirements, 0.05% line and load regulation and 0.1 µF disc decoupling capacitors located near the pins are recommended. Adjustment Procedure Figure 1 shows a circuit for trimming the zero location. Full scale may be trimmed by adjusting RIN, VREF, or CREF. Recommended procedure for a 10kHz full-scale frequency is as follows: (1) Set VIN to 10 mV and trim the zero adjust circuit to obtain a 10Hz output frequency. (2) Set VIN to 10V and trim either RIN, VREF, or CREF to obtain a 10kHz output frequency. If adjustments are performed in this order, there should be no interaction and they should not have to be repeated. Figure 3. Recommended CREF vs VREF 500 400 300 200 100 0 –1 –2 –3 –4 –5 –6 –7 VREF (V) 1 kHz 100kHz VDD = +5V VSS = – 5V RIN = 1MΩ VIN = +10V TA = +25°C Improved Single Supply V/F Converter Operation A TC9400 which operates from a single 12 to 15V variable power source is shown in Figure 5. This 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. Full scale adjustment is accomplished by trimming the input current. Trimming the reference voltage is not recom- mended for high accuracy applications unless an op amp is used as a buffer, because the TC9400 requires a low impedance reference (see the VREF pin description section for more information). The circuit of Figure 5 will directly interface with CMOS logic operating at 12V to 15V. TTL or 5V CMOS logic can be accommodated by connecting the output pullup resistors to the +5V supply. An optoisolator can also be used if an isolated output is required. |
同様の部品番号 - TC9401CPD |
|
同様の説明 - TC9401CPD |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |