データシートサーチシステム |
|
MC1408P8 データシート(PDF) 9 Page - National Semiconductor (TI) |
|
|
MC1408P8 データシート(HTML) 9 Page - National Semiconductor (TI) |
9 / 12 page Test Circuits (Continued) Application Hints REFERENCE AMPLIFIER DRIVE AND COMPENSATION The reference amplifier provides a voltage at pin 14 for converting the reference voltage to a current, and a turn-around circuit or current mirror for feeding the ladder. The reference amplifier input currrent, I 14, must always flow into pin 14, regardless of the set-up method or reference voltage polarity. Connections for a positive voltage are shown in Figure 7. The reference voltage source supplies the full current I 14. For bipolar reference signals, as in the multiplying mode, R15 can be tied to a negative voltage corresponding to the minimum input level. It is possible to eliminate R15 with only a small sacrifice in accuracy and temperature drift. The compensation capacitor value must be increased with increases in R14 to maintain proper phase margin; for R14 values of 1, 2.5 and 5 k Ω, minimum capacitor values are 15, 37 and 75 pF. The capacitor may be tied to either V EE or ground, but using V EE increases negative supply rejection. A negative reference voltage may be used if R14 is grounded and the reference voltage is applied to R15 as shown in Figure 8. A high input impedance is the main DS005687-11 FIGURE 8. Negative V REF (Note 8) DS005687-12 FIGURE 9. Programmable Gain Amplifier or Digital Attenuator Circuit (Note 8) www.national.com 9 |
同様の部品番号 - MC1408P8 |
|
同様の説明 - MC1408P8 |
|
|
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 |