ZHCSBA9C July 2013 – November 2017 TAS5760LD
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Digital I/O Pins
- 6.6 Master Clock
- 6.7 Serial Audio Port
- 6.8 Protection Circuitry
- 6.9 Speaker Amplifier in All Modes
- 6.10 Speaker Amplifier in Stereo Bridge-Tied Load (BTL) Mode
- 6.11 Speaker Amplifier in Mono Parallel Bridge-Tied Load (PBTL) Mode
- 6.12 Headphone Amplifier and Line Driver
- 6.13 I²C Control Port
- 6.14 Typical Idle, Mute, Shutdown, Operational Power Consumption
- 6.15 Typical Speaker Amplifier Performance Characteristics (Stereo BTL Mode)
- 6.16 Typical Performance Characteristics (Mono PBTL Mode)
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1
Hardware Control Mode
- 8.4.1.1 Speaker Amplifier Shut Down (SPK_SD Pin)
- 8.4.1.2 Serial Audio Port in Hardware Control Mode
- 8.4.1.3 Soft Clipper Control (SFT_CLIP Pin)
- 8.4.1.4 Speaker Amplifier Switching Frequency Select (FREQ/SDA Pin)
- 8.4.1.5 Parallel Bridge Tied Load Mode Select (PBTL/SCL Pin)
- 8.4.1.6 Speaker Amplifier Sleep Enable (SPK_SLEEP/ADR Pin)
- 8.4.1.7 Speaker Amplifier Gain Select (SPK_GAIN [1:0] Pins)
- 8.4.1.8 Considerations for Setting the Speaker Amplifier Gain Structure
- 8.4.2 Software Control Mode
- 8.4.1
Hardware Control Mode
- 8.5
Register Maps
- 8.5.1 Control Port Registers - Quick Reference
- 8.5.2
Control Port Registers - Detailed Description
- 8.5.2.1 Device Identification Register (0x00)
- 8.5.2.2 Power Control Register (0x01)
- 8.5.2.3 Digital Control Register (0x02)
- 8.5.2.4 Volume Control Configuration Register (0x03)
- 8.5.2.5 Left Channel Volume Control Register (0x04)
- 8.5.2.6 Right Channel Volume Control Register (0x05)
- 8.5.2.7 Analog Control Register (0x06)
- 8.5.2.8 Reserved Register (0x07)
- 8.5.2.9 Fault Configuration and Error Status Register (0x08)
- 8.5.2.10 Reserved Controls (9 / 0x09) - (15 / 0x0F)
- 8.5.2.11 Digital Clipper Control 2 Register (0x10)
- 8.5.2.12 Digital Clipper Control 1 Register (0x11)
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Applications
- 9.2.1
Stereo BTL Using Software Control
- 9.2.1.1 Design Requirements
- 9.2.1.2
Detailed Design Procedure
- 9.2.1.2.1 Startup Procedures- Software Control Mode
- 9.2.1.2.2 Shutdown Procedures- Software Control Mode
- 9.2.1.2.3 Component Selection and Hardware Connections
- 9.2.1.2.4 Recommended Startup and Shutdown Procedures
- 9.2.1.2.5
Headphone and Line Driver Amplifier
- 9.2.1.2.5.1 Charge-Pump Flying Capacitor and DR_VSS Capacitor
- 9.2.1.2.5.2 Decoupling Capacitors
- 9.2.1.2.5.3 Gain-Setting Resistor Ranges
- 9.2.1.2.5.4 Using the Line Driver Amplifier in the TAS5760LD as a Second-Order Filter
- 9.2.1.2.5.5 External Undervoltage Detection
- 9.2.1.2.5.6 Input-Blocking Capacitors
- 9.2.1.2.6 Gain-Setting Resistors
- 9.2.1.3 Application Curves
- 9.2.2 Stereo BTL Using Hardware Control
- 9.2.3 Mono PBTL Using Software Control
- 9.2.4 Mono PBTL Using Hardware Control
- 9.2.1
Stereo BTL Using Software Control
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
9.2.1.2.5.4 Using the Line Driver Amplifier in the TAS5760LD as a Second-Order Filter
Several audio DACs used today require an external low-pass filter to remove out-of-band noise. This is possible with the headphone amplifier / line driver inside the TAS5760LD, as it can be used like a standard operational amplifier. Several filter topologies can be implemented, both single-ended and differential. In Figure 59, multi-feedback (MFB) with differential input and single-ended input are shown.
An ac-coupling capacitor to remove dc content from the source is shown; it serves to block any dc content from the source and lowers the dc gain to 1, helping to reduce the output dc offset to a minimum.
The component values can be calculated with the help of the TI FilterPro™ program available on the TI Web site at: http://focus.ti.com/docs/toolsw/folders/print/filterpro.html.
Figure 59. Second-Order Active Low-Pass Filter
The resistor values should have a low value for obtaining low noise, but should also have a high enough value to get a small-size ac-coupling capacitor. With the proposed values of R1 = 15 kΩ, R2 = 30 kΩ, and R3 = 43 kΩ, a dynamic range (DYR) of 106 dB can be achieved with a 1-mF input ac-coupling capacitor.