參數(shù)資料
型號： MAX9850
廠商： Maxim Integrated Products, Inc.
英文描述： Stereo Audio DAC with DirectDrive Headphone Amplifier
中文描述： 立體聲音頻DAC，帶有DirectDrive®耳機放大器
文件頁數(shù)： 19/36頁
文件大?。?/td> 956K
代理商： MAX9850
Slave modes of operation allow the MAX9850 to operate
in any audio system where the LRCLK and BCLK must be
supplied from an external source. When operating in
slave mode, the MCLK supplied to the MAX9850 may be
either synchronous or asynchronous with LRCLK. Use the
slave integer mode if ICLK is synchronous and has an
integer multiple of 16 x LRCLK. Integer mode ensures
that the highest levels of full-scale-input signal perfor-
mance can be achieved. Slave noninteger mode offers
the highest degree of clock flexibility. ICLK does not
need to be synchronous or an integer multiple of
LRCLK when operating in slave noninteger mode.
Master modes of operation allow the MAX9850 to gener-
ate and supply an LRCLK and BCLK to other elements in
the system. Use master integer mode if the provided
ICLK is an integer multiple of 16 x LRCLK. Integer mode
ensures that the highest levels of full-scale input signal
performance can be achieved. Master noninteger mode
allows the MAX9850 to supply virtually any frequency
LRCLK with an accuracy better than ±0.5%.
The slave noninteger mode provides maximum flexibility
for ICLK and LRCLK frequencies. The ICLK and LRCLK
can be asynchronous and noninteger related. Connect
any available system clock that is listed on Table 5 in
the
Internal Timing
section. In slave noninteger mode,
the acceptable MCLK frequency range is the same as
master mode.
Master Integer Mode (MAS = 1, IM = 1)
The MAX9850 generates the LRCLK and BCLK in mas-
ter mode. LRCLK is an integer factor of ICLK by the fol-
lowing equation:
where:
f
ICLK
= ICLK frequency. f
ICLK
must be at least 160 x
f
LRCLK
for proper DAC operation.
N
LSB
= decimal value of the data contained in LSB(7:0)
(register 0x9, bits B7–B0).
f
LRCLK
= LRCLK frequency.
For example:
f
ICLK
= 12.228MHz and N
LSB
= 16 (0x10), f
LRCLK
=
48kHz.
Solve the above equation for N
LSB
. Use master integer
mode if N
LSB
is an integer. Use master noninteger
mode if N
LSB
is not an integer.
Slave Integer Mode (MAS = 0, IM = 1)
The MAX9850 accepts LRCLK and BCLK from an
external digital audio source when in slave integer
mode. LRCLK must be an
exact
integer multiple of
ICLK to ensure proper operation. Program LSB(7:0)
(register 0x9, bits B7–B0) with the LRCLK division ratio.
Use the following equation to find the value that needs
to be programmed to LSB(7:0):
where:
f
ICLK
= ICLK frequency. f
ICLK
must be 160 x f
LRCLK
for
proper DAC operation.
f
LRCLK
= supplied LRCLK frequency.
N
LSB
= decimal value of the data contained in LSB(7:0)
(register 0x9, bits B7–B0).
For example:
f
ICLK
= 11.2896MHz and f
LRCLK
= 44.1kHz, N
LSB
= 16
(0x10).
Solve the above equation for N
LSB
. Use slave integer
mode if N
LSB
is an integer. Use slave noninteger mode
if N
LSB
is not an integer.
Slave Noninteger (MAS = 0, IM = 0)
In slave noninteger mode, the MAX9850 accepts an
external LRCLK and converts the digital audio signal
using any asynchronous ICLK within the acceptable
operating range. The MAX9850 uses internal clock
recovery circuitry to generate all required internal clocks.
This allows the MAX9850 to operate in systems that do
not have dedicated clock sources or crystal oscillators.
Virtually any existing system clock will work. f
ICLK
must
be at least 176 x f
LRCLK
for proper operation.
Master Noninteger Mode (MAS = 1, IM = 0)
The ICLK frequency in some applications may not be
an integer multiple of the desired LRCLK frequency.
The MAX9850, operating in master noninteger mode,
can generate and output any LRCLK frequency
between 8kHz to 48kHz (
±
0.5%) with any ICLK frequen-
cy within the acceptable operating range. In this mode,
the MAX9850 generates LRCLK by dividing MCLK by
the ratio programmed into MSB(14:8) and LSB(7:0)
(register 0x8, bits B7–B0 and register 0x9, bits B6–B0).
The LRCLK sample frequency can have any noninteger
relationship with respect to MCLK. Calculate the values
for MSB(14:8) and LSB(7:0) with the following equation:
N
ROUND
f
f
MSB LSB
LRCLK
ICLK
,
×
=
2
22
N
f
f
LSB
ICLK
LRCLK
16
=
f
f
N
LRCLK
ICLK
LSB
=
16
M
Stereo Audio DAC with DirectDrive
Headphone Amplifier
______________________________________________________________________________________
19
相關PDF資料
PDF描述
MAX9850ETI Stereo Audio DAC with DirectDrive Headphone Amplifier
MAX9995ETX-D Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX-T Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX-TD Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
相關代理商/技術(shù)參數(shù)
參數(shù)描述
MAX98500EVKIT+ 功能描述:音頻 IC 開發(fā)工具 MAX98500 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
MAX98500EWE+ 制造商:Maxim Integrated Products 功能描述:BOOSTED CLASS D AMPLIFIER WITH ALC - Rail/Tube
MAX98500EWE+T 功能描述:音頻放大器 2.2W Mono Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX98502EVKIT# 功能描述:放大器 IC 開發(fā)工具 MAX98502 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V
MAX98502EWE+ 功能描述:音頻放大器 Boosted Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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