 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AD5044 Datasheet(PDF) 21 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
AD5044 Datasheet(HTML) 21 Page - Analog Devices |
|
|
21 / 24 page  AD5066 Rev. A | Page 21 of 24 APPLICATIONS INFORMATION USING A REFERENCE AS A POWER SUPPLY Because the supply current required by the AD5066 is extremely low, an alternative option is to use a voltage reference to supply the required voltage to the parts (see Figure 47). This is espe- cially useful if the power supply is quite noisy or if the system supply voltages are at some value other than 5 V or 3 V, for example, 15 V. The voltage reference outputs a steady supply voltage for the AD5066. If the low dropout REF195 is used, it must supply 2.5 mA of current to the AD5066 with no load on the output of the DAC. SYNC SCLK DIN 15V 5V 4.5V VOUTx = 0V TO 4.5V VDD VREF REF195 AD5066 3-WIRE SERIAL INTERFACE REF194 Figure 47. REF195 as a Power Supply to the AD5066 BIPOLAR OPERATION The AD5066 has been designed for single-supply operation, but a bipolar output range is also possible using the circuit in Figure 48. The circuit gives an output voltage range of ±5 V. Rail-to-rail operation at the amplifier output is achieved using an AD8638 or AD8639 the output amplifier. The output voltage for any input code can be calculated as follows: × − + × × = R1 R2 V R1 R2 R1 D V V DD DD O 536 , 65 where: D = the input code in decimal (0 to 65,535). VDD = 5 V. R1 = R2 = 10 kΩ. V 5 536 , 65 10 − × = D VO This is an output voltage range of ±5 V, with 0x0000 corre- sponding to a −5 V output, and 0xFFFF corresponding to a +5 V output. 3-WIRE SERIAL INTERFACE R2 = 10k Ω +5V AD820/ OP295 +5.5V +5V AD5066 VDD VOUT R1 = 10k Ω VREF ±5V 0.1µF 10µF VREF –5V Figure 48. Bipolar Operation with the AD5066 USING THE AD5066 WITH A GALVANICALLY ISOLATED INTERFACE In process control applications in industrial environments, it is often necessary to use a galvanically isolated interface to protect and isolate the controlling circuitry from any hazardous common-mode voltages that can occur in the area where the DAC is functioning. iCoupler® provides isolation in excess of 2.5 kV. The AD5066 uses a 3-wire serial logic interface, so the ADuM1300 three-channel digital isolator provides the required isolation (see Figure 49). The power supply to the part also needs to be isolated, which is done by using a transformer. On the DAC side of the transformer, a 5 V regulator provides the 5 V supply required for the AD5066. 0.1µF GND DIN SYNC SCLK POWER 10µF SDI SCLK DATA AD5066 VOUTx VOB VOA VOC VDD VIC VIB VIA ADuM1300 5V REGULATOR Figure 49. AD5066 with a Galvanically Isolated Interface |
Similar Part No. - AD5044 |
|
Similar Description - AD5044 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
