Texas Instruments DRV601EVM User manual

User's GuideSLOU215 – January 2008
DRV601EVM
This user’s guide describes the operation of the DRV601EVM stereo line driver evaluation module andprovides measurement data and design information such as the schematic, bill of materials, andprinted-circuit board layout.
Contents1 Overview ...................................................................................................................... 22 Quick Setup Guide........................................................................................................... 33 Shutdown ..................................................................................................................... 54 Component Selection ....................................................................................................... 55 Layout Recommendations .................................................................................................. 76 DRV601EVM Performance ................................................................................................. 87 Related Documentation from Texas Instruments ...................................................................... 198 Design Documentation .................................................................................................... 19
List of Figures
1 DRV601EVM ................................................................................................................. 22 DRV601 Functional Block Diagram ....................................................................................... 33 DRV601EVM Physical Structure ........................................................................................... 34 Power-Up/Down Sequence ................................................................................................. 55 Second-Order, Active Low-Pass Filter .................................................................................... 66 THD+N vs Voltage (600 Ω)................................................................................................. 97 THD+N vs Voltage (600 Ω)................................................................................................. 98 THD+N vs Voltage (100-k Ωload) ........................................................................................ 109 THD+N vs Voltage (100- Ωload) Linear Scale ......................................................................... 1010 THD+N vs Voltage (600- ΩLoad) ........................................................................................ 1111 THD+N vs Voltage (100-k ΩLoad) ....................................................................................... 1112 THD+N vs Frequency (600- ΩLoad) ..................................................................................... 1213 THD+N vs Frequency (600- ΩLoad) Using X7R Input Capacitors .................................................. 1214 FFT Spectrum With –60-dBFS Tone .................................................................................... 1315 Idle Noise FFT Spectrum (BTL) .......................................................................................... 1316 Channel Separation ........................................................................................................ 1417 Channel Separation, 10x Lower Feedback Impedance ............................................................... 1518 Frequency Response ...................................................................................................... 1519 Phase Response ........................................................................................................... 1620 Pop/Click (Enable) ......................................................................................................... 1721 Pop/Click (Disable) ......................................................................................................... 1822 DRV601EVM PCB Component Placement Top ........................................................................ 2123 PCB Top Layer ............................................................................................................. 2124 PCB Bottom Layer ......................................................................................................... 22
List of Tables
1 DRV601 Features ............................................................................................................ 22 Recommended Supply Voltage ............................................................................................ 53 DRV601EVM Specification ................................................................................................. 64 General Test Specifications ................................................................................................ 8PurePath Digital, DirectPath, FilterPro are trademarks of Texas Instruments.
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1 Overview
Overview
5 Electrical Data ................................................................................................................ 86 Audio Performance .......................................................................................................... 87 Physical Specifications ...................................................................................................... 88 DRV601EVM Parts List .................................................................................................... 209 PCB Specifications ......................................................................................................... 20
The DRV601EVM customer evaluation module (EVM) demonstrates the integrated circuits DRV601RTJfrom Texas Instruments (TI).
The DRV601 is a stereo line driver designed to allow the removal of the DC-blocking capacitors forreduced component count and cost. The DRV601 is ideal for single-supply electronics where size andcost are critical design parameters ().
The DRV601 is capable of driving 2 Vrms into a 600- Ωload at 3.3-V supply. The DRV601 has externalgain-setting resistors, that support a gain range of -1 V/V to -10 V/V and line outputs that have ±8 kV IECESD protection. The DRV601 has independent shutdown control for the left and right audio channels.
This EVM is configured with two RCA phone input connectors and two RCA phone output connectors.Power supply is connected via a two-pin 2,54-mm pin header.
The EVM is configured with a gain of –2 V/V.
Table 1. DRV601 Features
KEY PARAMETERS
Supply Voltage 1.8 V to 4.5 VNumber of Channels 2Load Impedance Minimum 600 ΩOutput Voltage 2 Vrms / 600 Ω< 0.005% THDDYR > 108 dBGain –2 V/V
This EVM is designed for evaluating applications such as A/V receivers, DVD receivers, DVDminicomponent systems, home theater in a box (HTIB) designs, or set-top boxes.
This document covers EVM specifications, audio performance and power efficiency measurementsgraphs, and design documentation that includes schematics, parts list, layout, and mechanical design.
Figure 1. DRV601EVM
Gerber (layout) files are available at the TI Web site .
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1.1 DRV601EVM Features
Functional Block Diagram
Rin
SVDD
SVDD
SVSS
SVSS
Audio In - R
Audio In - L
SGND
Audio Out - R
Audio Out - L
Short
Circuit
Protection
Charge
Pump
Bias
Circuitry
SDx
C1N
C1P
PVSS
Rin
Rfb
Rfb
1.2 PCB Key Map
2 Quick Setup Guide
Quick Setup Guide
•Two-channel evaluation module, a double-sided, plated-through printed-circuit board (PCB) layout.•2-V
RMS
line output•Output capacitor-less.
•Shutdown button
Figure 2. DRV601 Functional Block Diagram
The physical structure of the DRV601EVM is shown in Figure 3 .
Figure 3. DRV601EVM Physical Structure
This section describes the DRV601EVM board in regards to power supply and system interfaces. Itprovides information regarding handling and unpacking, absolute operating conditions, and a descriptionof the factory default switch and jumper configuration.
The following is a step–by–step guide to configuring the DRV601EVM for device evaluation.
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2.1 Electrostatic Discharge Warning
2.2 Unpacking the EVM
Quick Setup Guide
Many of the components on the DRV601EVM are susceptible to damage by electrostatic discharge (ESD).Customers are advised to observe proper ESD handling precautions when unpacking and handling theEVM, including the use of a grounded wrist strap at an approved ESD workstation.
CAUTION
Failure to observe ESD handling procedures may result in damage to EVMcomponents.
On opening the DRV601EVM package, ensure that the following items are included:•1 DRV601EVM board with one DRV601RTJ•1 pc. PurePath Digital™ CD-ROM
If either of these items is missing, contact the Texas Instruments Product Information Center nearest youto inquire about a replacement.
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2.3 Power Supply Setup
3 Shutdown
DVDD
SHUTDOWN
> 50 sm> 50 sm
4 Component Selection
4.1 Charge Pump
Shutdown
To power up the EVM, one power supply is needed. The power supply is connected to the EVM using a2-pin, 2,54-mm pin header, J10.
Table 2. Recommended Supply Voltage
Description Voltage Limitations Current Requirement Cable
Power supply 1.8 V to 4.5 V 0.3 A
CAUTION
Applying voltages above the limitations given in Table 2 may cause permanentdamage to your hardware.
For minimum click and pop during power on and power off, the shutdown pin should be kept low. Thepreferred power-up/down sequence is shown in Figure 4 .
Figure 4. Power-Up/Down Sequence
The charge pump flying capacitor, C13, serves to transfer charge during the generation of the negativesupply voltage. The PVSS capacitor must be at least equal to the charge pump capacitor in order to allowmaximum charge transfer. Low ESR capacitors are an ideal selection, and a value of 1 µF is typical.Capacitor values smaller than 1 µF can be used, but the maximum output can be reduced. It is thereforerecommended to validate the design with thorough testing.
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4.2 Decoupling Capacitors
4.3 Supply Voltage Limiting at 4.5 V
4.4 Using the DRV601 as a Second-Order Low-Pass Filter
C1
R1 R3
R2
C2
+
-
C3
Component Selection
The DRV601 is a DirectPath™ line driver amplifier that requires adequate power supply decoupling toensure that the noise and total harmonic distortion (THD) are low. A good low equivalent-series-resistance(ESR) ceramic capacitor, C12, typical 1 µF, placed as close as possible to the device V
DD
leads worksbest. Placing this decoupling capacitor close to the DRV601 is important for the performance of theamplifier. For filtering lower frequency noise signals, a 10- µF or greater capacitor placed near the audioamplifier also helps, but is not required in most applications because of the high PSRR of this device.
The charge pump circuit does apply ripple current on the V
DD
line, and a LC or RC filter may be needed ifnoise-sensitive audio devices share the V
DD
supply.
The DRV601 has a build-in charge pump which serves to generate a negative rail for the line driver.Because the line driver operates from a positive and negative voltage supply, circuitry has beenimplemented to protect the devices in the amplifier from an overvoltage condition. Once the supply isabove 4.5 V, the DRV601 can shut down in an overvoltage protection mode to prevent damage to thedevice.
Many of the audio DACs used today require an external low-pass filter, to remove band noise. This ispossible with the DRV601, and the EVM is configured as a 40-kHz second-order, active Butterworth filter.The topology chosen is the MFB Single-Ended. Further, the DRV601 needs a ac-coupling capacitor toremove dc-content from the source.
Figure 5. Second-Order, Active Low-Pass Filter
The component values can be calculated with the help of the TI FilterPro™ program available on:http://focus.ti.com/docs/toolsw/folders/print/filterpro.html
In Table 3 , various proposals for the filter and gain settings can be found.
Table 3. DRV601EVM Specification
Gain High Pass Low Pass C1 C2 C3 R1 R2 R3
–1 V/V 16 Hz 40 kHz 100 pF 680 pF 1 µF 10 kR 10 kR 24 kR-1.5 V/V 19 Hz 40 kHz 68 pF 680 pF 1 µF 8.2 kR 12 kR 30 kR-2 V/V 11 Hz 40 kHz 33 pF 330 pF 1 µF 15 kR 30 kR 47 kR–2 V/V 11 Hz 30 kHz 47 pF 470 pF 1 µF 15 kR 30 kR 43 kR–3.33 V/V 12 Hz 40 kHz 33 pF 470 pF 1 µF 13 kR 43 kR 43 kR-10 V/V 15 Hz 30 kHz 22 pF 1 nF 2.2 µF 4.7 kR 47 kR 27 kR
The resistor values should be low value to get low noise, but should be high value to get a small sizeac-coupling capacitor. With the proposed values, 15k, 30k, and47k, a DYR of 105 dB can be achievedwith a small 1- µF input ac-coupling capacitor.
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5 Layout Recommendations
5.1 Exposed Pad on the DRV601RJT Package
5.2 SGND and PGND Connections
Layout Recommendations
The exposed metal pad on the DRV601RTJ package can be soldered to a pad on the PCB in order toimprove reliability. The pad on the PCB should be allowed to float and not be connected to ground orpower. Connecting this pad to power or ground prevents the device from working properly because it isconnected internally to PVSS.
The SGND and PGND pins of the DRV601 must be routed separately back to the decoupling capacitor inorder to provide proper device operation. If the SGND pins are connected directly to each other, the partfunctions without risk of failure, but the noise and THD performance can be reduced.
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6 DRV601EVM Performance
DRV601EVM Performance
This section provides general test specifications, electrical data, audio performance data, and physicalspecifications.
Table 4. General Test Specifications
(1)
GENERAL TEST SPECIFICATIONS NOTES
Supply Voltage 3.3 VLoad Impedance 600 ΩInput Signal 1-kHz SineMeasurement Filter AES17
(1)
These test conditions are used for all tests, unless otherwise specified.
Table 5. Electrical Data
(1)
ELECTRICAL DATA SPECIFICATIONS NOTES/CONDITIONS
Output Voltage, 600 Ω2.2 Vrms 1 kHz, unclipped (< 1% THD), T
A
= 25 °COutput Voltage, 100 k Ω2.3 Vrms 1 kHz, unclipped (< 1% THD), T
A
= 25 °CSupply Current < 10 mA 1 kHz, 2 m Vrms output voltageSupply Current < 20 mA 1 kHz, 2 m Vrms output voltage into 600 Ω
(1)
All electrical and audio specifications are typical values.
Table 6. Audio Performance
AUDIO PERFORMANCE NOTES/CONDITIONS
THD+N, 600 Ω0.02 Vrms < 0.099 % 1 kHz (Noise-limited)THD+N, 600 Ω0.2 Vrms < 0.009 % 1 kHz (Noise-limited)THD+N, 600 Ω2 Vrms < 0.006 % 1 kHzTHD+N, 100 k Ω0.02 Vrms < 0.099 % 1 kHz (Noise-limited)THD+N, 100 k Ω0.2 Vrms < 0.009 % 1 kHz (Noise- limited)THD+N, 100 k Ω2 Vrms < 0.005 % 1 kHzDynamic Range > 105 dB Ref: 2 Vrms, A-weighted, AES17 filterNoise Voltage < 12 µVrms A-weighted, AES17 filterDC Offset < 5m mV No signal, 600- ΩloadChannel Separation > 97 dB 1 kHz, 2 VrmsFrequency Response: 20 Hz to 20 kHz +0.5/–1 dB 2 Vrms/600 Ω
Table 7. Physical Specifications
(1)
PHYSICAL SPECIFICATIONS NOTES/CONDITIONS
PCB Dimensions 50 x 60 x 25 Width x Length x Height (mm)Total Weight 35g Components + PCB + Mechanics
(1)
All electrical and audio specifications are typical values.
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6.1 THD+N vs Voltage (600- ΩLoad)
10m 420m 50m 100m 200m 500m 1 2
V - Output Voltage - Vrms
O
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
4.5 V DVDD
3.3 V DVDD
1.8 V DVDD
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
250m 4500m750m 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.751
V - Output Voltage - Vrms
O
1.8 V DVDD
3.3 V DVDD
4.5 V DVDD
DRV601EVM Performance
Figure 6. THD+N vs Voltage (600 Ω)
The THD+N from 10m Vrms to approximately 0.5 Vrms is dominated by noise.
Figure 7. THD+N vs Voltage (600 Ω)
Here the THD+N versus output voltage is shown with linear scale, this makes it easier to see whereclipping occurs. Clipping is often defines as THD+N=1%. For the DRV601 this is 2.25 Vrms with a 3.3-Vsupply and 600- Ωload.
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6.2 THD+N vs Voltage (100-k Ωload)
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
10m 420m 50m 100m 200m 500m 1 2
V - Output Voltage - Vrms
O
3.3 V DVDD
4.5 V DVDD
1.8 V DVDD
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
250m 4500m 750m 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.751
V - Output Voltage - Vrms
O
1.8 V DVDD
3.3 V DVDD
4.5 V DVDD
DRV601EVM Performance
Figure 8. THD+N vs Voltage (100-k Ωload)
The THD+N in the range from 10mVrms to 1Vrms is completely dominated by noise.
Figure 9. THD+N vs Voltage (100- Ωload) Linear Scale
Here the THD+N versus output voltage is shown with linear scale; this makes it easier to see whereclipping occurs. Clipping is often defines as THD+N = 1%. For the DRV601 this is over 2.25 Vrms with a3.3-V supply and 100-k Ωload.
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6.3 THD+N vs Frequency (600R Load)
1 31.2 1.4 1.6 1.8 22.2 2.4 2.6 2.8
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
V - Output Voltage - Vrms
O
3.3 V DVDD
3.63 V DVDD
3.3 V DVDD
-100
-20
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
10m 3
20m 50m 100m 200m 500m 1 2
T
V - Output Voltage - Vrms
O
THD+N - Total Harmonic Distortion Plus Noise - dB
3.3 V DVDD
DRV601EVM Performance
Figure 10. THD+N vs Voltage (600- ΩLoad)
Here the clipping is shown with a 3.3-V supply, and ±10% tolerance. It shows that even with a low DVDD,3.3 V–10% , the DRV601 can achieve the 2 Vrms with a THD+N less than 1%.
2 Vrms is equal to 2.848-Vpeak; that is only 142-mV drop from the 2.97-V supply
Figure 11. THD+N vs Voltage (100-k ΩLoad)
With the THD+N in dB scale. 0.001% corresponds to –100 dB.
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6.4 THD+N vs Frequency
20 20k50 100 200 500 1k 2k 5k 10k
f - Frequency - Hz
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
2 Vrms 600 W
2 Vrms 100 kW
20 20k50 100 200 500 1k 2k 5k 10k
f - Frequency - Hz
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
THD+N - Total Harmonic Distortion Plus Noise - %
X7R 1 F, 16 V, 0805m
X7R 1 F, 50 V, 1206m
1 F filmm
DRV601EVM Performance
Figure 12. THD+N vs Frequency (600- ΩLoad)
The DRV601EVM uses a 1- µF film capacitor for ac-coupling of the input signal. If a lower cost ceramiccapacitor, like a X7R is used, higher THD at low frequencies should be expected. Y5V capacitors showeven higher THD and cannot be recommended at all.
Figure 13. THD+N vs Frequency (600- ΩLoad) Using X7R Input Capacitors
The X7R capacitors raise the 20-Hz THD from 0.003% to 0.04% or 0.07–20 times higher. If the costrequirements for the system demand that an inexpensive capacitor is used, then select the X7R capacitorwith the highest voltage rating, as seen from the figure a 50-V X7R 1206 capacitor has 2x lower THD thana 16-V X7R 0805 capacitor.
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6.5 FFT Spectrum With –60 dBFS Tone
022k2k 4k 6k 8k 10k 12k 14k 16k 18k 20k
f - Frequency - Hz
-150
0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude - dB
6.6 Idle Noise FFT Spectrum
0 90k10k 20k 30k 40k 50k 60k 70k 80k
f - Frequency - Hz
-150
0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude - dB
DRV601EVM Performance
Reference voltage is 2 Vrms. FFT size 16k.
Figure 14. FFT Spectrum With –60-dBFS Tone
This spectrum corresponds to a dynamic range of 104-dB A-weighted. SNR measures to 104 dBA-weighted, <12 µVrms. This noise floor is dominated by the feedback resistor network impedance level.This can be improved by lowering the impedance level, a 10x lower impedance level lowers the noise floorto 110 dB, <6 µVrms.
Reference voltage is 2 Vrms. FFT size 16k.
Figure 15. Idle Noise FFT Spectrum (BTL)
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6.7 Channel Separation
20 20k
50 100 200 500 1k 2k 5k 10k
f - Frequency - Hz
-120
0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude - dB
0 dB
Right to Left
Left Rightto
DRV601EVM Performance
Channel-1 output signal is 2 Vrms; channel-2 input is grounded. Reference voltage is 2 Vrms; the load is600R.
Figure 16. Channel Separation
Left-to-right cross-coupling and right-to-left cross-coupling are not exactly the same; a difference of 15 dBis seen at 1 kHz. The channel separation is more than 80 dB in both cases. The cause for thecross-coupling is the high impedance of the feedback network. If a lower cross-coupling is wanted, thefeedback impedance can be lowered, this has an influence on the input coupling capacitor that needs tobe equally larger and thereby adds more cost.
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6.8 Frequency Response
-120
0
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Amplitude - dB
20 20k
50 100 200 500 1k 2k 5k 10k
f - Frequency - Hz
0 dB
Left Rightto
Right to Left
-20
2
-18
-16
-14
-12
-10
-8
-6
-4
-2
-0
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
f - Frequency - Hz
Amplitude - dB
600 loadW
DRV601EVM Performance
Measurement bandwidth filter is set to 500 kHz.
Figure 17. Channel Separation, 10x Lower Feedback Impedance
With a 10x lower impedance in the feedback network, the channel separation improved significantly and isnow >100 dB at 1 kHz. The lower impedance network also improved the noise floor, and now the dynamicrange is >110-dB , equal to <6- µVrms noise.
The parts used are: R11=R12=1k5, R16=R17=3k0, R14=R15=4k7, C17=C18=3n3, C19=C20=330 pF,C15=C16=10 µF ac-coupling.
Measurement bandwidth filter is set to 500 kHz.
Figure 18. Frequency Response
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-360
0
-340
-320
-300
-280
-260
-240
-220
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
20 80k50 100 200 500 1k 2k 5k 10k 20k 50k
f - Frequency - Hz
Amplitude - dB
600 loadW
6.9 Pop/Click (Enable)
DRV601EVM Performance
Figure 19. Phase Response
The low-frequency cutoff of 10 Hz (–3 dB) is determined by the input ac-coupling capacitor, 1 µF, togetherwith the feedback network input impedance of 15kR.
The low-pass, second-order filter implemented gives a –3 dB approximately at 35 kHz, and the responseis 13 dB down at 80 kHz.
No input signal is applied. The measurement results are presented both in a time domain and in afrequency domain. The resistor load is 600 Ω.
The power supply is applied, and then the shutdown signal is released. The shutdown signal is used totrigger the measuring system. For a description of the measuring technique, see the application reportPop and Click Measuring Technique (SLEA044 ).
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-100m
100m
-80m
-60m
-40m
-20m
0
20m
40m
60m
80m
-2m 2m-1m 0 1m
t - Time - s
Voltage - V
-100
0
-90
-80
-70
-60
-50
-40
-30
-20
-10
300 30k500 1k 2k 5k 10k 20k
f - Frequency - Hz
Amplitude - dBr
6.10 Pop/Click (Disable)
DRV601EVM Performance
Figure 20. Pop/Click (Enable)
The DRV601 shows very low pop during enable; only two small high-frequency spikes can be seen. Themeasurements are made with reference to 2 Vrms = 0 dB, 2 mV=-60 dBr.
No input signal is applied. The measurement results are presented both in a time domain and in afrequency domain.
No input signal applied. Load: 600 Ω.
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-100m
100m
-80m
-60m
-40m
-20m
0
20m
40m
60m
80m
-2m 2m-1m 0 1m
t - Time - s
Voltage - V
-100
0
-90
-80
-70
-60
-50
-40
-30
-20
-10
300 30k500 1k 2k 5k 10k 20k
f - Frequency - Hz
Amplitude - dBr
DRV601EVM Performance
Figure 21. Pop/Click (Disable)
During power-down, the click is even lower than during power-on (enable). A very small click is seen.
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7 Related Documentation from Texas Instruments
8 Design Documentation
8.1 DRV601EVM Schematic
R12 12
R18
10 R
1 2
C17
330 pF
21
R19
10 R
1 2
C18
330 pF
21
Shutdown
J11
Phono socket
2
3
4
1
J12
Phono socket
2
3
4
1
GND
GND
GND
GND
U1
DRV601
C1P
1
PGND
2
C1N
3
NC
4
PVSS
5
NC
6
SVSS
7
NC
8
OUTL
9
SVDD
10
OUTR 11
NC 12
INL 13
/SDR 14
INR 15
NC 16
SGND 17
/SDL 18
PVDD 19
NC 20
PowerPAD 21
GND
C13
21
GND
C14
2 1
C12
1 Fm
2 1
GND
GND
C15
2 1
C16
1 Fm
2 1
Layout note:
Do not ground the powerpad - keep it floating
Place C12-C13-C14 close to U10
Place R14-C19 close to pin 15
Place R15-C20 close to pin 13
Gain: = R16/R11 = R17/R12 = 2.0
Low Pass filter: 40kHz 2nd Order Butterworth
High Pass filter: R11-C15 = R12-C16 aprox. 10Hz
Line Driver
Input
Output
C19
33 pF
21
R13
12
C20
33 pF
21
+3.3 V
+3.3 V
1.8V to 4.5V
Power supply
C11
2 1
GND
SW1
Switch
1 4 2 3
R14
1 2
J21
Phono socket
2
3
4
1
R15
47 kW
1 2
J22
Phono socket
2
3
4
1
GND
GND
R16
30 kW
1 2
R11
15 kW
12
R17
30 kW
1 2
J10
Header
1
2
GND
1 Fm
1 Fm
47 kW
47 kW
15 kW
1 Fm
1 Fm
Related Documentation from Texas Instruments
For detailed descriptions of the integrated circuits used in the design of the DRV601EVM, see data sheetDirectPath™ Stereo Line Driver, Adjustable Gain (SLOS553 ).
This section includes a schematic for the DRV601EVM, the bill of materials, and the PCB designspecifications.
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8.2 Parts List
8.3 PCB Specifications
Design Documentation
Table 8. DRV601EVM Parts List
Qty Part Reference Description Manufacture First Mfr P/N
4 C11 C12 C13 C14 Ceramic 1 µF / 16V / 20% X7R 0805 Capacitor BC Components 0805B105M160NT2 C15 C16 Metal Film 1uF / 16V / 20% Polyester 1210 Capacitor Panasonic ECPU1C105MA52 C17 C18 Ceramic 330 pF / 50V / 10% NP0 0603 Capacitor BC Components 0603N331K500NT2 C19 C20 Ceramic 33 pF / 50V / 10% NP0 0603 Capacitor BC Components 0603N330K500NT1 J10 2 pins / 1 row / 2,54mm Pitch Vertical Male Friction Molex 22-27-2021Lock Pin Header4 J11 J12 J21 J22 Horizontal Female w. Switch Coax Phono socket Chunfeng RJ843-4W1 PCB11 A834-PCB-001_2.00 / DRV601EVM Printed Circuit Printline A834-PCB-001(2.00)Board (ver. 2.00)2 R11 R12 15k / 100 mW / 5% / 0603 Thick Film Resistor Yageo RC0603JR-0715KL3 R13 R14 R15 47k / 100 mW / 5% / 0603 Thick Film Resistor Yageo RC0603JR-0747KL2 R16 R17 30k / 100 mW / 5% / 0603 Thick Film Resistor Yageo RC0603JR-0730KL2 R18 R19 10R / 100 mW / 5% / 0603 Thick Film Resistor Yageo RC0603JR-0710RL1 SW1 Switch 6 mm SMD Tactile Switch Omron B3S-10001 U1 DRV601 / DirectPath™ Audio Line Driver with external Texas Instruments DRV601RTJTgain setting. (QFN-20)
Table 9. PCB Specifications
BOARD IDENTIFICATION A834-PCB-001(2.00)BOARD TYPE Double-sided plated-through boardLAMINATE TYPE FR4LAMINATE THICKNESS 1,6 mmCOPPER THICKNESS 35 µm (Include plating exterior layer)COPPER PLATING OF HOLES > 25 µmMINIMUM HOLE DIAMETER 0,3 mmSILKSCREEN COMPONENT SIDE White—Remove silkscreen from solder area and pre-tinned areasSILKSCREEN SOLDER SIDE NoneSOLDER MASK COMPONENT SIDE GreenSOLDER MASK SOLDER SIDE GreenPROTECTIVE COATING Solder coating and chemical silver on free copperELECTRICAL TEST PCB must be electrically testedMANUFACTURED TO PERFAG 2E (www.perfag.dk )APERTURE TABLE PERFAG 10A (www.perfag.dk )BOARD SIZE 60 mm ×50 mmCOMMENTS See drill information file (A834-PCB-001 (DrillDrawing).pdf)
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