參數(shù)資料
型號: PCM4222PFB
英文描述: High-Performance, Two-Channel, 24-Bit, 216kHz Sampling Multi-Bit Delta-Sigma Analog-to-Digital Converter
中文描述: 高性能,雙通道,24位,216kHz的采樣多位Δ-Σ模擬到數(shù)字轉(zhuǎn)換器
文件頁數(shù): 17/38頁
文件大?。?/td> 604K
代理商: PCM4222PFB
www.ti.com
ANALOG INPUTS
The PCM4222 includes two analog inputs, referred to as the
left
and
right
channels. Each channel includes a
pair of differential voltage input pins. The left channel inputs are named VINL– (pin 10) and VINL+ (pin 11),
respectively. The right channel inputs are named VINR– (pin 2) and VINR+ (pin 3), respectively. Each pin of an
input pair has a nominal full scale input of 2.8V
PP
. The full-scale input for a given pair is specified as 5.6V
PP
differential in the
Electrical Characteristics
table.
Figure 37
shows the full-scale input range of the PCM4222,
with the input signals centered on the nominal common-mode voltage of +1.95V.
2.8V
Full-Scale
PP
2.8V
Full-Scale
PP
VINL+
or
VINR+
VINL
-
or
VINR
-
+1.95V
+1.95V
VOLTAGE REFERENCE
The PCM4222 includes an on-chip, band-gap voltage reference. The band-gap output voltage is buffered and
then routed to the two delta-sigma modulators. The inclusion of an on-chip reference circuit enhances the
power-supply noise rejection of the PCM4222. The buffered reference voltage for each channel is filtered using
external capacitors. The capacitors are connected between VREFL (pin 15) and REFGNDL (pin 14) for the left
channel, and VREFR (pin 46) and REFGNDR (pin 47) for the right channel.
Figure 38
illustrates the recommend
reference decoupling capacitor values and connection scheme.
The 10nF to 100nF capacitors in
Figure 38
may be metal film or X7R/C0G ceramic chip capacitors. The 100
μ
F
capacitors may be polymer tantalum chip (Kemet T520 series or equivalent) or aluminum electrolytic.
PCM4222
SBAS399A–OCTOBER 2006–REVISED MARCH 2007
PRODUCT INFORMATION (continued)
In a typical application, the front end is driven by a buffer amplifier or microphone/line level preamplifier.
Examples are given in the
Input Buffer Circuits
section of this datasheet. The analog inputs of the PCM4222
may be driven up to the absolute maximum input rating without instability. If the analog input voltage is expected
to exceed the absolute maximum input ratings in a given application, it is recommended that input clamping or
limiting be added to the analog input circuitry prior to the PCM4222 in order to provide protection against
damaging the device. Specifications for the analog inputs are given in the
Electrical Characteristics
and
Absolute
Maximum Ratings
tables of this datasheet.
Figure 37. Full-Scale Analog Input Range
The VREFL and VREFR pins are not designed for biasing external input circuitry. Two common-mode voltage
outputs are provided for this purpose, and are discussed in the following section.
17
Submit Documentation Feedback
相關(guān)PDF資料
PDF描述
PCM4222PFBR High-Performance, Two-Channel, 24-Bit, 216kHz Sampling Multi-Bit Delta-Sigma Analog-to-Digital Converter
PCM50KG Audio Digital-to-Analog Converter
PCM51 Audio Digital-to-Analog Converter
PCM52JG-V Audio Digital-to-Analog Converter
PCM53JG-I Audio Digital-to-Analog Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM4222PFBG4 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24B/216kHz 124dB Stereo Audio ADC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM4222PFBR 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24-Bit/216kHz 124dB RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM4222PFBRG4 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24B/216kHz 124dB Stereo Audio ADC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM-423 制造商:Panduit Corp 功能描述:
PCM-425-449 功能描述:電線鑒定 Pre-Printed WM Card Vinyl Cloth .22" W RoHS:否 制造商:TE Connectivity / Q-Cees 產(chǎn)品:Labels and Signs 類型: 材料:Vinyl 顏色:Blue 寬度:0.625 in 長度:1 in