Electronic Components Datasheet Search |
|
MAX9717DEBL-T Datasheet(PDF) 9 Page - Maxim Integrated Products |
|
MAX9717DEBL-T Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 19 page Detailed Description The MAX9716/MAX9717 are 1.3W BTL speaker ampli- fiers. Both devices feature a low-power shutdown mode, and industry-leading click-and-pop suppression. The MAX9717 features a headphone sense input that disables the slave BTL amplifier to drive the headphone as a single-ended load. These devices consist of high output-current audio amps configured as BTL ampli- fiers (see Functional Diagrams). The closed-loop gain of the input op amp sets the single-ended gain of the device. Two external gain resistors set the gain of the MAX9716 and MAX9717A (see the Gain-Setting Resistor section). The MAX9717B/C/D feature internally set gains of 6dB, 9dB, and 12dB, respectively. The output of the first amplifier serves as the input of the second amplifier, which is configured as an inverting unity-gain follower. This results in two outputs, identical in amplitude, but 180° out-of-phase. BIAS The MAX9716/MAX9717 operate from a single 2.7V to 5.5V supply and feature an internally generated, common- mode bias voltage of VCC/2 referenced to ground. BIAS provides both click-and-pop suppression and sets the DC bias level for the audio outputs. The MAX9716 can be configured as a single-ended or differential input. For sin- gle-ended input, connect the noninverting input IN+ to BIAS externally. The MAX9717 BIAS is internally connect- ed to the amplifier noninverting input IN+. The MAX9717 can only be used with a single-ended input. Always bypass BIAS to ground with a capacitor. Choose the value of the bypass capacitor as described in the BIAS Capacitor section. Do not connect external loads to BIAS. Any load lowers the BIAS voltage, affecting the overall performance of the device. BTL/SE Control Input The MAX9717 features a headphone sense input, BTL/SE, that enables headphone jack sensing to con- trol the power amplifier output configuration. Driving BTL/SE low enables the slave amplifier (OUT-). Driving BTL/SE high disables the slave amplifier. Shutdown Mode The MAX9716/MAX9717 feature a low-power shutdown mode that reduces quiescent current consumption to 10nA. Entering shutdown disables the bias circuitry, forces the amplifier outputs to GND through an internal 20k Ω resistor. Drive SHDN low to enter shutdown mode; drive SHDN high for normal operation. Click-and-Pop Suppression The MAX9716/MAX9717 feature Maxim’s industry-leading click-and-pop suppression circuitry. During startup, the amplifier common-mode bias voltage ramps to the DC bias. When entering shutdown, the amplifier outputs are pulled to GND through an internal 20k Ω resistor. This scheme minimizes the energy present in the audio band. Low-Cost, Mono, 1.4W BTL Audio Power Amplifiers _______________________________________________________________________________________ 9 Pin Description PIN BUMP TDFN/µMAX UCSP MAX9716 MAX9717 MAX9716 MAX9717 NAME FUNCTION 1 1 C3 C3 SHDN Active-Low Shutdown 2 2 C1 C1 BIAS DC Bias Bypass Capacitor Connection. Bypass BIAS to ground with a 1µF capacitor. 3 — A3 — IN+ Noninverting Input 4 4 A1 A1 IN- Inverting Input 5 5 A2 A2 OUT+ Bridge Amplifier Positive Output 6 6 B3 B3 VCC Power Supply. Bypass VCC with a 1µF capacitor to ground. 77 B1, B2 B1, B2 GND Ground 8 8 C2 C2 OUT- Bridge Amplifier Negative Output. OUT- becomes high-impedance when BTL/SE is driven high. —3 — A3 BTL/SE BTL/Single-Ended Mode Input. Logic low sets the device in BTL mode. Logic high sets the device in single-ended mode. EP EP — — EP Exposed Pad. Connect EP to GND. |
Similar Part No. - MAX9717DEBL-T |
|
Similar Description - MAX9717DEBL-T |
|
|
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 |