Electronic Components Datasheet Search |
|
TLC7225 Datasheet(PDF) 8 Page - Texas Instruments |
|
|
TLC7225 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 22 page TLC7225C, TLC7225I QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS SLAS109B – OCTOBER 1996 – REVISED FEBRUARY 2001 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION specification ranges For the TLC7225 to operate to rated specifications, the input reference voltage must be at least 4 V below the power supply voltage at the VDD terminal. This voltage differential is the overhead voltage required by the output amplifiers. The TLC7225 is specified to operate over a VDD range from 12 V ± 5% to 15 V ± 10% (i.e., from 11.4 V to 16.5 V) with a VSS of – 5 V ± 10%. Operation is also specified for a single supply with a VDD of 15 V ± 5%. Applying a VSS of – 5 V results in improved zero-code error, improved output sink capability with outputs near AGND, and improved negative-going settling time. Performance is specified over the range of reference voltages from 2 V to (VDD – 4 V) with dual supplies. This allows a range of standard refence generators to be used such as the TL1431, with an adjustable 2.5-V bandgap reference. Note that an output voltage range of 0 V to 10 V requires a nominal 15 V ± 5% power supply voltage. DAC section The TLC7225 contains four, identical, 8-bit voltage-mode DACs. Each converter has a separate reference input. The output voltages from the converters have the same polarity as the reference voltages, thus allowing single supply operation. The simplified circuit diagram for channel A is shown in Figure 4. Note that AGND (terminal 6) is common to all four DACs. 2R 2R R R R _ + OUTA REFA AGND 2R 2R 2R DB0 DB5 DB6 DB7 Shown For All 1s On DAC Figure 4. DAC Simplified-Circuit Diagram The input impedance at any of the reference inputs is code dependent and can vary from 1.4 k Ω minimum to an open circuit. The lowest input impedance at any reference input occurs when that DAC is loaded with the digital code 01010101. Therefore, it is important that the reference source presents a low output impedance under changing load conditions. The nodal capacitance at the reference terminals is also code dependent and typically varies from 60 pF to 300 pF. Each OUTx terminal can be considered as a digitally programmable voltage source with an output voltage of: VOUTx = Dx × VREFx where Dx is the fractional representation of the digital input code and can vary from 0 to 255/256. The output impedance is that of the output buffer amplifier. |
Similar Part No. - TLC7225 |
|
Similar Description - TLC7225 |
|
|
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 |