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| 型號： | PCM4222 |
| 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)： | 31/38頁 |
| 文件大小： | 604K |
| 代理商： | PCM4222 |
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www.ti.com
560
(0.1%)
W
2
3
G
1
R
T
S
40.2
(1%)
W
40.2
(1%)
W
270
(0.1%)
W
270
(0.1%)
W
OPA1632DGN
Analog Input
Full-Scale: 11.76V
Differential
PP
typical with R = 40
W
1nF
1nF
560
(0.1%)
W
Ground
Lift Switch
2.7nF
10nF 100nF
-
-
15V
2
1
8
EN
V
OCM
VINL or VINR
-
-
VINL or VINR+
From
Buffered V
COM
7
6
3
4
5
10nF 100nF
-
+15V
100nF
PCM4222
SBAS399A–OCTOBER 2006–REVISED MARCH 2007
Figure 50. Differential Input Buffer Circuit Utilizing the OPA1632
Figure 51
demonstrates the same circuit topology of
Figure 50
, while using standard single or dual op amps.
The noise level of this circuit is adequate for obtaining the typical A-weighted dynamic range performance for the
PCM4222. However, unweighted performance may suffer, depending upon the op amp noise specifications.
Near-typical THD+N can be achieved with this configuration, although this performance also depends on the op
amps used for the application. The
NE5534A
and
OPA227
(the lower cost 'A' version) are good candidates from
a noise and distortion perspective, and are reasonably priced. More expensive lower-noise models, such as the
OPA211
, should also work well for this configuration. Feedback and input resistor values may be changed to
alter circuit gain. However, it is recommmended that all circuit changes be simulated and then tested on the
bench using a working prototype to verify performance.
Figure 52
illustrates a differential input circuit that employs a noninverting architecture. The total noise and
distortion is expected to be higher than that measured for
Figure 50
and
Figure 51
. As with
Figure 51
, the
NE5534A
and
OPA227
are good candidates for this circuit, although similar op amps should yield equivalent
results.
A useful tool for simulating the circuits shown here is
TINA-TI
, a free schematic capture and SPICE-based
simulator program available from the
Texas Instruments web site
. This tool includes macro models for many TI
and Burr-Brown branded amplifiers and analog integrated circuits. TINA-TI runs on personal computers using
Microsoft Windows
operating systems.
31
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM4222_07 | 制造商:BB 制造商全稱:BB 功能描述:High-Performance, Two-Channel, 24-Bit, 216kHz Sampling Multi-Bit Delta-Sigma Analog-to-Digital Converter |
| PCM4222EVM | 功能描述:音頻 IC 開發(fā)工具 PCM4222 Evaluation Module 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 |
| PCM4222EVM | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
| PCM4222PFB | 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: |
| 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: |
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