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參數(shù)資料
| 型號： | AD1849KP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費家電 |
| 英文描述： | Serial-Port 16-Bit SoundPort Stereo Codec |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 25/28頁 |
| 文件大小： | 293K |
| 代理商： | AD1849KP |
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AD1849K
REV. 0
–25–
CS4215 COMPAT IBILIT Y
T he Analog Devices AD1849K SoundPort Stereo Codec is pin-
compatible with the CS4215. T hese chips were independently
codeveloped to a common specification provided by Sun
Microsystems, Inc. Because of their independent development,
they will differ in performance and in minor details. A board can
be designed to accommodate either chip by attending to a few
differences in their required support circuitry.
If consistent control information is transmitted to the Codec
during Control Mode, the AD1849K DCB handshake is
compatible with the CS4215. See text for more details.
T he Analog Devices AD1849K uses two external capacitors
to complete its internal input filter as shown in Figure 18.
T he CS4215 calls the two pins on the AD1849K for these
capacitor connections, “no connects.” By laying out a board
with these capacitors, either chip will work.
T he AD1849K
requires an external
passive
antialias filter as
shown in Figure 11. In contrast, the recommended input
circuit for the CS4215 is a single-pole
active
filter requiring a
dual op amp. T hough overkill for the AD1849K , this input
circuit will work with the AD1849K as well.
T he AD1849K was designed to require no external low-pass
filters on analog outputs. As shown in Figure 13, the
AD1849K only requires ac coupling capacitors and resistors
for line-level dc bias. In contrast, the CS4215 has a single-
pole passive filter for its recommended line-level output
circuit. T hough overkill for the AD1849K , this output circuit
will work with the AD1849K as well.
Pin 38 (PLCC) and Pin 32 (T QFP) on the AD1849K is used
as a digital power supply. On the CS4215, this pin is a “no
connect.” We strongly recommend connecting this pin to the
digital supply. Both chips should operate in this configura-
tion. Pin 39 (PLCC) and Pin 33 (T QFP) on the AD1849K is
used as a digital ground. On the CS4215, this pin is a “no
connect.” We strongly recommend connecting this pin to the
digital ground plane. Both chips should operate in this
configuration.
Analog Devices recommends a 10
μ
F bypass capacitor on the
voltage reference output, CMOUT (Pin 19). Using a 0.47
μ
F
capacitor may be acceptable in many systems, however DAC
performance at low sample rates will be improved with the
larger capacitor.
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相關(guān)代理商/技術(shù)參數(shù) |
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| AD1849KP-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 16-Bit 44-Pin PLCC T/R |
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| AD1849KST | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:A-Law/u-Law/Linear CODEC |
| AD-1850 | 制造商:SPC Multicomp 功能描述:ADAPTOR 18VDC 500MA 制造商:SPC Multicomp 功能描述:ADAPTOR, 18VDC, 500MA |
| AD-1850 | 制造商:UNBRANDED 功能描述:ADAPTOR 18VDC 500MA |
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