Datasheet

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DRV604PWPEVM (continued)
7 THD+N vs Frequency (HeadPhone Output) ........................................................................... 10
8 FFT Spectrum with –60-dBFS Tone (Line Output).................................................................... 11
9 FFT Spectrum with –60-dBFS Tone (Head-Phone Output) ......................................................... 11
10 Channel Separation, Line Output ....................................................................................... 12
11 Channel Separation, Headphone Output............................................................................... 12
12 Frequency Response, Line Output...................................................................................... 13
13 Pop/Click (Enable)......................................................................................................... 14
14 Pop/Click (Disable) ........................................................................................................ 14
15 DRV604PWPEVM Schematic: DRV604................................................................................ 16
16 DRV604PWPEVM PCB Component Placement ...................................................................... 18
17 DRV604PWPEVM PCB Top Layer ..................................................................................... 18
18 DRV604PWPEVM PCB Bottom Layer ................................................................................. 18
List of Tables
1 DRV604PWPEVM Specification .......................................................................................... 3
2 Recommended Supply Voltage ........................................................................................... 4
3 DRV604PWPEVM Filter Specifications .................................................................................. 6
4 General Test Conditions .................................................................................................. 7
5 Electrical Data ............................................................................................................... 7
6 Audio Performance Line Output .......................................................................................... 8
7 Audio Performance Headphone Output.................................................................................. 8
8 Physical Specifications ..................................................................................................... 8
9 Related Documentation................................................................................................... 15
10 Bill of Materials............................................................................................................. 17
1 Overview
The DRV604PWPEVM customer evaluation module demonstrates the DRV604PWP integrated circuit (IC)
from Texas Instruments (TI).
The DRV604PWP is a 2Vrms Pop-Free stereo line driver with a stereo headphone driver designed to
allow the removal of the output DC-blocking capacitors for reduced component count and cost. The device
is ideal for single supply electronics where size and cost are critical design parameters.
Designed using TI’s patented DirectPath™ technology, The DRV604 is capable of driving 2 Vrms into a
5kΩ load and a clean 40mW into a 32Ω headphone with a single 3.3V supply voltage. The device has
differential inputs and uses external gain setting resistors, that supports a gain range of ±1V/V to ±10V/V,
and line and headphone outputs have ±8kV IEC ESD protection. The DRV604 (occasionally referred to as
the '604) has built-in shutdown control for pop-free on/off control.
Using the DRV604 in audio products can reduce component count considerably compared to traditional
methods of generating a 2Vrms output. The DRV604 does not require a power supply greater than 3.3V to
generate its 5.6Vpp output, nor does it require a split rail power supply. The DRV604 integrates its own
charge pump to generate a negative supply rail that provides a clean, pop-free ground biased 2Vrms
output.
The DRV604 is available in a 28-pin HTSSOP.
This EVM is configured with single ended RCA input connectors for analog input, and RCA's for the line
output and a 3.5mm mini-jack for the HP output. Power supply is connected via a two pin 2.54mm pin
header.
2
DRV604PWPEVM SLOU288–February 2010
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