Electronic Components Datasheet Search |
|
SA572DTBG Datasheet(PDF) 5 Page - ON Semiconductor |
|
SA572DTBG Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 12 page SA572 http://onsemi.com 5 The residual distortion is third harmonic distortion and is caused by gain control ripple. In a compandor system, available control of fast attack and slow recovery improve ripple distortion significantly. At the unity gain level of 100 mV, the gain cell gives THD (total harmonic distortion) of 0.17% typ. Output noise with no input signals is only 6.0 mV in the audio spectrum (10 Hz-20 kHz). The output current IO must feed the virtual ground input of an operational amplifier with a resistor from output to inverting input. The non-inverting input of the operational amplifier has to be biased at VREF if the output current IO is DC coupled. VREF THD TRIM V+ 1 2 IG ) 1 2 IO I1 140mA 280mA I2 IG IO Q4 Q3 Q1 Q2 VIN + − A1 Figure 3. Basic Gain Cell Schematic R1 6.8kW Rectifier The rectifier is a full-wave design as shown in Figure 4. The input voltage is converted to current through the input resistor R2 and turns on either Q5 or Q6 depending on the signal polarity. Deadband of the voltage to current converter is reduced by the loop gain of the gain block A2. If AC coupling is used, the rectifier error comes only from input bias current of gain block A2. The input bias current is typically about 70 nA. Frequency response of the gain block A2 also causes second-order error at high frequency. The collector current of Q6 is mirrored and summed at the collector of Q5 to form the full wave rectified output current IR. The rectifier transfer function is: IR + VIN * VREF R2 (eq. 3) If VIN is AC-coupled, then the equation will be reduced to: IRAC + VIN(AVG) R2 The internal bias scheme limits the maximum output current IR to be around 300 mA. Within a "1.0 dB error band the input range of the rectifier is about 52 dB. VIN VREF V+ A2 + − IR + VIN * VREF R2 Figure 4. Simplified Rectifier Schematic Q5 Q6 R2 D7 |
Similar Part No. - SA572DTBG |
|
Similar Description - SA572DTBG |
|
|
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 |