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ZXCD1210JB16TA

P1-P3P4-P6P7-P8
Issue 2 - October 2007 1 www.zetex.com
© Zetex Semiconductors plc 2007
ZXCD1210
High performance analog input Class D modulator
Description
The ZXCD1210 provides complete control and
modulation functions at the heart of high
efficiency high performance Class D switching
audio amplifier solutions. In combination with
high performance output stages and open or
closed loop architectures, the ZXCD1210
provides a high performance audio amplifier
with all the inherent benefits of Class D.
The ZXCD1210 solution uses proprietary
circuit design to realise the true benefits of
Class D without the traditional drawback of
poor distortion performance. The combination
of reference circuit designs, magnetic
component choice and layout are essential to
realising these benefits.
Features
• Output power 50W to 500W into 4
⍀
• THD+N <0.05%
• Dynamic range 98dB
• Open loop and closed loop reference designs
• Frequency response
Subwoofers: ±0.5dB from 10Hz to 250Hz
Full band: ±0.5dB from 20Hz to 20kHz
• 200kHz PWM frequency
• Output drive free of crossover artifacts
• QFN16 4x4 package
The ZXCD1210 reference designs provide output
powers up to 500W RMS with typical distortion
and noise of less than 0.05% and a dynamic
range of 98dB. The closed loop designs ensure a
high damping factor and excellent supply
rejection. The open loop designs provide high
performance in the most economic
implementation.
The closed loop reference designs include
circuits specifically for subwoofer applications
featuring a flat frequency response up to 250Hz.
The open loop designs give the ZXCD1210 the
ability to produce amplifiers with full a 20kHz
bandwidth.
Applications
• Subwoofers
• Home theatre systems
• Multimedia
• Wireless speakers
• Portable audio
This plot shows the
THD+N versus power
plot for a 500W closed
loop subwoofer
reference design.
THD+N is 0.02%
between 10W and
200W which is
outstanding
performance.
0.02
0.3
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.28
THD+N (%)
100m 500200m 500m 1 2 5 10 20 50 100 200
Output power (W)
ZXCD1210
Issue 2 - October 2007 2 www.zetex.com
© Zetex Semiconductors plc 2007
Absolute maximum ratings - Terminal voltage with respect to GND
V
CC
20V
Power dissipation 1W
Package thermal resistance (⍜ja) 55°C/W
Operating temperature range -40°C to 70°C
Maximum junction temperature 125°C
Storage temperature range -50°C to 85°C
Stresses beyond those listed under ‘Absolute maximum ratings’ may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum conditions for extended periods
may affect device reliability.
Electrical characteristics - Test conditions (unless otherwise stated) V
CC
= 16V, T
A
= 25°C
Symbol Parameter Conditions Limits Units
Min. Typ. Max.
V
CC
Operating voltage range
(*)
NOTES:
(*) For optimum thermal performance it is recommended that the ZXCD1210 is operated with a V
CC
of 12V.
12 16 18 V
I
SS
Quiescent current V
CC
=12V 45 mA
V
CC
= 18V, 16V 50 mA
F
CK
Clock frequency Clock capacitor =330pF 150 200 250 kHz
T
CK
Clock frequency tolerance Clock capacitor = 330pF ±25 %
V
OLPWM
Low level PWM output voltage No load 100 mV
V
OHPWM
High level PWM output voltage No load 7.5 V
T
DR
PWM output rise and fall time
Load capacitance = 2200pF
50 ns
T
REG5V5
REG5V5 tolerance 1uF decoupling 5.23 5.5 5.77 V
T
REG9V
REF9V tolerance 1uF decoupling 8.32 8.75 9.18 V
R
AIN
Audio input impedance 1.35 1.8 2.3 k⍀
R
SLI
Modulation input impedance 1.35 1.8 2.3 k⍀
B
AIN
Audio input bias level 2.95 3.1 3.25 V
B
SLI
Modulation input bias level 2.95 3.1 3.25 V
V
CK
Clock amplitude 0.89 1.05 1.2 V
ZXCD1210
Issue 2 - October 2007 3 www.zetex.com
© Zetex Semiconductors plc 2007
Pin connection diagrams
QFN16 4x4 package
Pin no. Pin name Pin description
1 PWML PWM drive
2 REG5V5 Internal supply rail
3 AINL Audio input
4 MODIL Modulation control
5 MODOL Modulation control
6 N/C No connection
7 CK External capacitor to set PWM frequency
8 MODOR Modulation control
9 MODIR Modulation control
10 AINR Audio input
11 Sgnd Signal ground
12 PWMR PWM drive
13 Pgnd Power ground
14 REG9VR Internal supply rail
15 VCC Internal supply pin
16 REG9VL Internal supply rail
1
2
3
4
5
6
7
8
12
11
10
9
16
15
14
13
P1-P3P4-P6P7-P8

ZXCD1210JB16TA

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Description:
Audio Amplifiers CLASS D MODULATOR
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