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PDF CRD35L01 Data sheet ( Hoja de datos )
| Número de pieza | CRD35L01 | |
| Descripción | 1 x 1.7 W CS35L01 Amplifier Reference Design Kit | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CRD35L01
www.DataSheet4U.com
1 x 1.7 W CS35L01 Amplifier Reference Design Kit
Features
Four boards provided in the CS35L01 Amplifier
Reference Design Kit
Separate boards for each mode configuration
– SD, FSD, HD, and FHD
CS35L01 produces a default +6-dB Gain
Delivers 1.4 W/Ch into 8 at 1% THD+N
Delivers 1.7 W/Ch into 8 at 10% THD+N
Differential mono analog inputs
Demonstrates recommended 4-layer layout
and grounding arrangements
– Optional output filter connections
– Optional gain adjustment resistors
Powered by a single 2.5- to 5.5-V power supply
Device shutdown control
Description
The CRD35L01 demonstrates the CS35L01 high-effi-
ciency Hybrid Class-D audio amplifier. This reference
design implements a single-channel amplifier that deliv-
ers 1.7 W per full-bridge channel into 8- loads using a
single +5-V supply.
Differential audio inputs can easily be connected
through the J1 header. If desired, the gain can be ad-
justed through the optional input resistors.
The -SD, -FSD, -HD, or -FHD suffix designates the
CS35L01’s operational mode. Each of the four boards
is configured to operate in each of the four correspond-
ing modes of the CS35L01 device.
Device shutdown control is available through the J2
header.
ORDERING INFORMATION
CRD35L01
CS35L01 Reference Design
Analog
Input (J1)
Optional
Gain
Adjustment
Shutdown
Control (J2)
CS35L01
(SD Mode)
Optional
Output
Filter
Speaker
Output (J3)
VBATT
Power (J4)
Analog
Input (J1)
Optional
Gain
Adjustment
Shutdown
Control (J2)
CS35L01
(FSD Mode)
Optional
Output
Filter
Speaker
Output (J3)
VBATT
Power (J4)
Analog
Input (J1)
Optional
Gain
Adjustment
Shutdown
Control (J2)
CS35L01
(HD Mode)
Optional
Output
Filter
Speaker
Output (J3)
VBATT
Power (J4)
Analog
Input (J1)
Optional
Gain
Adjustment
Shutdown
Control (J2)
CS35L01
(FHD Mode)
Optional
Output
Filter
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2010
(All Rights Reserved)
Speaker
Output (J3)
VBATT
Power (J4)
APR '10
DS914RD2
1 page  
CRD35L01
By adding series resistance to the input, the signal amplitude to the CS35L01 will be rewduwcwe.dD,ataanSdheweitl4lU.com
reduce the overall system gain. The typical input impedance values of the CS35L01 can be found in the
device datasheet.
In order to use the optional gain adjustment resistors, the traces between the R1 pads and the traces be-
tween the R2 pads must be cut to break the bypass circuit, before populating R1 and R2 with the desired
resistance values. The location of these required cuts are shown in Figure 1. After the trace between the
pads has been broken, the gain adjustment resistors can be added to the board.
1.6 Differential Analog Inputs
The differential audio inputs into the CS35L01 are provided by the 3-pin header (J1) through DC blocking
capacitors (C1 and C2). The C1 and C2 capacitors allow for an analog source to connect directly to the
CS35L01 regardless of any DC bias that may be present between the analog audio source’s outputs and
CS35L01 inputs.
1.7 Speaker Outputs
The CS35L01 power outputs are configured for a full-bridge, single audio channel. The outputs are routed
through an optional EMI output filter and then presented at the J3 header (OUT- and OUT+).
1.7.1
Optional Speaker Output EMI Filter Components
As mentioned above, the CS35L01 contains optional placeholders for a series ferrite bead and shunt ca-
pacitor output filter. For most applications with very short speaker leads between the CS35L01 and the
speaker, use of these components will not be necessary. However, if there is a long signal path between
the CS35L01 and the speaker or if the system requires connecting to cables off the PCB, it is suggested
that the ferrite bead and capacitor are populated with the recommended values shown in Figure 3 on
page 9.
In order to use the optional output filter ferrite beads, the traces between the L1 pads and the traces be-
tween the L2 pads must be cut to break the bypass circuit, before populating L1 and L2 with the desired
component values. The location of these required cuts are shown in Figure 1.
Cut the bypass
traces before insert-
ing the optional
input gain adjust-
ment resistors
Figure 1. Optional Bypass Trace Cut Locations
Cut the bypass
traces before insert-
ing the optional out-
put filter ferrite
beads
DS914RD2
5
5 Page 
CRD35L01
www.DataSheet4U.com
Figure 12. CRD35L01-FSD Top Side Component
Placement
Figure 13. CRD35L01-FSD Bottom Side Component
Placement
Figure 14. CRD35L01-FSD Layer 1 Copper
Figure 15. CRD35L01-FSD Layer 2 Copper
Figure 16. CRD35L01-FSD Layer 3 Copper
DS914RD2
Figure 17. CRD35L01-FSD Layer 4 Copper
11
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet CRD35L01.PDF ] | |
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