參數(shù)資料
型號(hào)： 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)： 30/38頁
文件大小： 604K
代理商： PCM4222PFB
www.ti.com
AGND
VINR
-
VINR+
VCC1
AGND
AGND
AGND
AGND
VCC2
VINL
-
VINL+
1
2
3
4
PCM4222PFB
100nF to 1 F
m
Left Channel
Analog Input
+4.0V
100nF
+
100 F
m
5
6
7
8
9
12
13
14
15
16
17
18
19
20
21
22
23
24
AGND
VCOML
REFGNDL
VREFL
PCMEN
MOD1
MOD2
MOD3
MOD4
MOD5
MOD6
MODEN
DSDMODE
100 F
m
+
100nF
100nF
+
100 F
m
10
11
Right Channel
Analog Input
VCOMR
REFGNDR
VREFR
DGND
FMT0
FMT1
OWL0
OWL1
DGND
S/M
OVFR
48
47
46
45
From Host or Master Reset
From Audio Master Clock Source
44
43
42
41
40
37
36
35
34
33
32
31
30
29
28
27
26
25
OVFL
RST
MCKI
LRCK
BCK
DATA
VDD
DGND
DSDR
DSDL
DSDCLK
WCKO
MCKO
100nF
+3.3V
+
100 F
m
39
38
100nF
+
100 F
m
100nF to 1 F
m
External
Digital
Filtering
and Processing
+3.3V
+3.3V
INPUT BUFFER CIRCUITS
The PCM4222 is typically preceded in an application by an input buffer or preamplifier circuit. The input circuit is
required to perform anti-aliasing filtering, in addition to application-specific analog gain scaling, limiting, or
processing that may be needed. At a minimum, first-order, low-pass anti-aliasing filtering is necessary. The input
buffer must be able to perform the input filtering requirement, in addition to driving the switched-capacitor inputs
of the PCM4222 device. The buffer must have adequate bandwidth, slew rate, settling time, and output drive
capability to perform these tasks.
PCM4222
SBAS399A–OCTOBER 2006–REVISED MARCH 2007
Figure 49. Typical Connections for MBM Output Mode
Figure 50
illustrates the input buffer/filter circuit utilized on the
PCM4222EVM evaluation module
. This circuit has
been optimized for measurement purposes, so that it does not degrade the dynamic characteristics of the
PCM4222. The resistors are primarily 0.1% metal film. The 40.2
resistor is 1% tolerance thick film. The 1nF
and 2.7nF capacitors may be either PPS film or C0G ceramic capacitors; both types perform with equivalent
results in this application. Surface-mount devices are utilized throughout because they provide superior
performance when combined with a wideband amplifier such as the
OPA1632
. The DGN package version of the
OPA1632 is utilized; this package includes a thermal pad on the bottom side. The thermal pad must be soldered
to the PCB ground plane for heat sink and mechanical support purposes.
30
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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
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