Datenblatt-Suchmaschine für elektronische Bauteile |
|
AD204JY Datenblatt(PDF) 5 Page - Analog Devices |
|
AD204JY Datenblatt(HTML) 5 Page - Analog Devices |
5 / 12 page REV. D AD202/AD204 –5– AD246 Clock Driver. The AD246 is a compact, inexpensive clock driver that can be used to obtain the required clock from a single 15 V supply. Alternatively, the circuit shown in Figure 4 (essentially an AD246) can be used. In either case, one clock circuit can operate at least 32 AD204s at the rated minimum supply voltage of 14.25 V and one additional isolator can be operated for each 40 mV increase in supply voltage up to 15 V. A supply bypass capacitor is included in the AD246, but if many AD204s are operated from a single AD246, an external bypass capacitor should be used with a value of at least 1 mF for every five isolators used. Place the capacitor as close as possible to the clock driver. 180pF 49.9k C RC R 2 3 1 Q CD 4047B 14 6 5 12 9 8 74 10 2 4 TELEDYNE TSC426 3 1N914 1N914 6 7 5 + 1 F 35V 15V CLK OUT CLK AND PWR COM Figure 4. Clock Driver Input Configurations. The AD202 and AD204 have been designed to be very easy to use in a wide range of applications. The basic connection for standard unity gain applications, useful for signals up to ±5 V, is shown in Figure 5; some of the possible variations are described below. When smaller signals must be handled, Figure 6 shows how to achieve gain while preserving a very high input resistance. The value of feedback resistor RF should be kept above 20 k W for best results. Whenever a gain of more than five is taken, a 100 pF capacitor from FB to IN COM is required. At lower gains this capacitor is unnecessary, but it will not adversely affect performance if used. OUT HI OUT LO IN– IN+ IN COM 15V OR CLOCK AD202 OR AD204 VOUT 5V 2k (SEE TEXT) VSIG ( 5V) FB Figure 5. Basic Unity-Gain Application AD202 OR AD204 2k VSIG VO VO = VSIG 1 + ––– RF 20k RF RG RF RG 100pF ( ) Figure 6. Input Connections for Gain > 1 The noninverting circuit of Figures 5 and 6 can also be used to your advantage when a signal inversion is needed: just interchange either the input leads or the output leads to get inversion. This approach retains the high input resistance of the noninverting circuit, and at unity gain no gain-setting resistors are needed. When the isolator is not powered, a negative input voltage of more than about 2 V will cause an input current to flow. If the signal source can supply more than a few mA under such con- ditions, the 2 k W resistor shown in series with IN+ should be used to limit current to a safe value. This is particularly impor- tant with the AD202, which may not start if a large input current is present. Figure 7 shows how to accommodate current inputs or sum currents or voltages. This circuit can also be used when the input signal is larger than the ±5 V input range of the isolator; for example, a ±50 V input span can be accommodated with RF = 20 k W and RS = 200 kW. Once again, a capacitor from FB to IN COM is required for gains above five. AD202 OR AD204 RS2 V V = – (V S1 ––– + V S2 ––– + IS RF + ... ) RF 20k RF RS1 RF RS2 RF RS1 IS VS1 VS2 Figure 7. Connections for Summing or Current Inputs (NOTE: Circuit figures shown on this page are for SIP-style packages. Refer to Page 3 for proper DIP package pinout.) |
Ähnliche Teilenummer - AD204JY |
|
Ähnliche Beschreibung - AD204JY |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller 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 |