Electronic Components Datasheet Search |
|
AD7393AR Datasheet(PDF) 7 Page - Analog Devices |
|
AD7393AR Datasheet(HTML) 7 Page - Analog Devices |
7 / 11 page AD7392/AD7393 –7– REV. A TIME – 100 s/DIV 100 50 0 2 0 1 0 IDD ( A) VOUT (V) SHDN 100 90 0% 10 Figure 23. Shutdown Recovery Time Table I. Control Logic Truth Table CS RS DAC Register Function H H Latched L H Transparent ↑ H Latched with New Data X L Loaded with All Zeros H ↑ Latched all Zeros NOTE ↑ Positive logic transition; X Don’t Care. OPERATION The AD7392 and AD7393 comprise a set of pin compatible, 12-bit/10-bit digital-to-analog converters. These single-supply operation devices consume less than 100 microamps of current while operating from power supplies in the +2.7 V to +5.5 V range making them ideal for battery operated applications. They contain a voltage-switched, 12-bit/10-bit, laser-trimmed digital- to-analog converter, rail-to-rail output op amps, and a parallel- input DAC register. The external reference input has constant input resistance independent of the digital code setting of the DAC. In addition, the reference input can be tied to the same supply voltage as VDD, resulting in a maximum output voltage span of 0 to VDD. The parallel data interface consists of 12 data bits, DB0–DB11, for the AD7392; 10 data bits, DB0–DB9, for the AD7393; and a CS write strobe. A RS pin is available to reset the DAC register to zero scale. This function is useful for power-on reset or system failure recovery to a known state. Additional power savings are accomplished by activating the SHDN pin, resulting in a 1.5 µA maximum consumption sleep mode. As long as the supply voltage remains, data will be re- tained in the DAC register to reset the DAC output when the part is taken out of shutdown ( SHDN = 1). D/A CONVERTER SECTION The voltage switched R-2R DAC generates an output voltage dependent on the external reference voltage connected to the REF pin according to the following equation: V OUT =VREF × D 2N Equation 1 where D is the decimal data word loaded into the DAC register, and N is the number of bits of DAC resolution. In the case of the 10-bit AD7393 using a 2.5 V reference, Equation 1 simpli- fies to: V OUT = 2.5 × D 1024 Equation 2 Using Equation 2, the nominal midscale voltage at VOUT is 1.25 V for D = 512; full-scale voltage is 2.497 volts. The LSB step size is = 2.5 × 1/1024 = 0.0024 volts. For the 12-bit AD7392 operating from a 5.0 V reference Equa- tion 1 becomes: V OUT =VREF × D 2N Equation 3 Using Equation 3, the AD7392 provides a nominal midscale voltage of 2.50 V for D = 2048, and a full-scale output of 4.998 volts. The LSB step size is = 5.0 × 1/4096 = 0.0012 volts. TEMPERATURE – C 1000 10 –55 –35 125 –15 65 85 105 525 45 100 VDD = 5.5V VREF = 2.5V SHDN = 0V AD7392 Figure 24. Shutdown Current vs. Temperature |
Similar Part No. - AD7393AR |
|
Similar Description - AD7393AR |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |