Electronic Components Datasheet Search |
|
MAX44211 Datasheet(PDF) 10 Page - Maxim Integrated Products |
|
MAX44211 Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 15 page Detailed Description A common technique used to couple OFDM signals to the AC powerline is through a signal transformer. A line driver is needed to provide adequate levels of current and voltage to drive the varying loads that exist on today’s powerlines. The MAX44211 line driver is efficient low-distortion power amplifiers that drive high current to the low-impedance loads common in powerline communication (PLC) appli- cations. The output stage is designed to linearly drive up to 1.5A peak current and a differential voltage of up to 36VP-P. They feature very intermodulation distortion to meet the demanding requirements of today’s standards. The MAX44211 also features two open-drain diagnostic outputs, STATUS1 and STATUS0. These act as flags to indicate the status of the part. Another significant feature of the MAX44211 is its thermal monitoring and shutdown capability. This allows the device to alert the host micro- controller of high temperature situations and then to automatically shut down to prevent damage should the temperature rise further. Output Enable Enable the MAX44211 output by pulling TXEN high. The amplifier outputs are fully enabled 2.4µs (typ) after TXEN is pulled high. If a signal is applied to the IN+ and IN- inputs during the startup time, it may be distorted and the linearity specifications may not be met. Bias MODE Selection The MAX44211 linearity can be improved at the expense of quiescent current. To meet CENELEC linearity require- ments and save power, the MODE input is left uncon- nected. To improve linearity and meet ARIB or FCC requirements, the MODE input is pulled high. Gain Selection and Output Connection Set the MAX44211 overall gain using the G1 and G0 inputs (Table 1). The outputs, OUT+ and OUT- are inter- nally biased at VAVDD/2 to allow for maximum voltage swing. Therefore, the output should be A.C. coupled to the coupling transformer to avoid DC currents flowing in the transformer. In addition, the secondary side of the transformer should also be AC-coupled to avoid shorting the line input. Protection and Diagnostics The MAX44211 has two diagnostic status outputs: STATUS0 and STATUS1. These are open drain outputs that indicate the status of the device as shown in Table 2. Both of the MAX44211 outputs are current limited. Set the output current limit according to the following equation. LIM SET 60 I R1 = + While RSET is in kΩ and ILIM is in ampere (see Typical Operating Circuit). Do not use RSET values below 23kΩ or above 250kΩ. Note that the tolerance for the current limit is ±30% so care must be taken to ensure that the limit is set high enough to avoid clipping at peak loads. In addition, if the current limit is set too high, the device may enter thermal shutdown mode. PIN NAME FUNCTION 16 STATUS1 Open-Drain Active-Low Status Output1. See Table 2 for details. 17 STATUS0 Open-Drain Active-Low Status Output0. See Table 2 for details. 18 DGND Digital Ground 19 IN+ Positive Signal Input 20 IN- Negative Signal Input — EP Exposed Pad. Internally connected to AGND. Connect the EP to a copper plane to enhance thermal dissipation. Table 1. Voltage Gain Selection G1 G0 GAIN (V/V) 0 0 6 0 1 12 1 0 15 1 1 18 MAX44211 High-Current Differential Line Driver for Powerline Communications www.maximintegrated.com Maxim Integrated │ 10 Pin Description (continued) |
Similar Part No. - MAX44211 |
|
Similar Description - MAX44211 |
|
|
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 |