參數(shù)資料
型號(hào)： CDB4216
廠商： Cirrus Logic, Inc.
元件分類： Codec
英文描述： 16-Bit Stereo Audio Codec
中文描述： 16位立體聲音頻編解碼器
文件頁(yè)數(shù)： 9/58頁(yè)
文件大?。?/td> 799K
代理商： CDB4216
OVERVIEW
The CS4216 contains two analog-to-digital con-
verters, two digital-to-analog converters,
adjustable input gain, and adjustable output level
control. Since the converters contain all the re-
quired filters in digital or sampled analog form,
the filters’ frequency responses track the sample
rate of the CS4216. Only a single-pole RC filter
is required on the analog inputs and outputs. The
RC filter acts as a charge reserve for the
switched-capacitor input and buffers op-amps
from a switched-capacitor load. Communication
with the CS4216 is via a serial port, with sepa-
rate pins for data into the device, and data from
the device. The filters and converters operate
over a sample rate range of 4 kHz to 50 kHz.
FUNCTIONAL SPECIFICATIONS
Analog Inputs and Outputs
Figure 1 illustrates the suggested connection dia-
gram to obtain full performance from the
CS4216. The line level inputs, LIN1 or LIN2
and RIN1 or RIN2, are selected by an internal
input multiplexer. This multiplexer is a source
selector and is not designed for switching be-
tween inputs at the sample rate.
Unused analog inputs that are not selected have
a very high input impedance, so they may be
tied to AGND directly. Unused analog inputs
that are selected should be tied to AGND
through a 0.1
μ
F capacitor. This prevents any
DC current flow.
The analog inputs are single-ended and inter-
nally biased to the REFBUF voltage (nominally
2.2 V). The REFBUF output pin can be used to
level shift an input signal centered around
0 Volts as shown in Figure 2. The input buffers
shown have a gain of 0.5, yielding a full scale
input sensitivity of 2 V
rms
with the CS4216 pro-
grammable gain set to 0. If the source imped-
ance is very low, then the inputs can be AC
coupled with a series 0.47
μ
F capacitor, elimi-
nating the need for external op-amps (see Figure
3). However, the use of AC coupling capacitors
will increase DC offset at 0dB gain (see Analog
Characteristics Table).
The analog outputs are also single-ended and
centered around the REFBUF pin. AC coupling
capacitors of >1
μ
F are recommended.
Line In
Right
Example
Op-Amps
are
MC34072
or
LT1013
Line In
Left
Op-amps are run
from VA+5V and
AGND
RINx
(PLCC pin 25 or 26)
REFBUF
LINx
(PLCC pin 27 or 28)
_
+
_
+
56 pF
10 k
20 k
0.47 uF
0.47 uF
0.47 uF 20 k
150
5 k
56 pF
10 k
150
0.01 uF
NPO
0.01 uF
NPO
Figure 2. DC Coupled Input.
Line In
Right
Line In
Left
0.01 uF
NPO
0.01 uF
NPO
150
150
0.47 uF
0.47 uF
RINx
(PLCC pin 25 or 26)
LINx
(PLCC pin 27 or 28)
Figure 3. AC Coupled Input
CS4216
DS83F2
9
相關(guān)PDF資料
PDF描述
CDB4220 24-Bit Stereo Audio Codec with 3V Interface
CDB4221 24-Bit Stereo Audio Codec with 3V Interface
CDB4222 20-Bit Stereo Audio Codec with Volume Control
CDB4224 24-Bit 105 dB Audio Codec with Volume Control
CDB4223 24-Bit 105 dB Audio Codec with Volume Control
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDB4220 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit Stereo Audio Codec with 3V Interface
CDB4221 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit Stereo Audio Codec with 3V Interface
CDB4222 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:20-Bit Stereo Audio Codec with Volume Control
CDB4223 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit 105 dB Audio Codec with Volume Control
CDB4224 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:24-Bit 105 dB Audio Codec with Volume Control
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