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參數(shù)資料
| 型號： | PCM1602APTG4 |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 22/46頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 24BIT 6CH 192KHZ 48-LQFP |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Basics |
| 標準包裝： | 250 |
| 位數(shù)： | 24 |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 6 |
| 電壓電源： | 模擬和數(shù)字 |
| 功率耗散（最大）： | 240mW |
| 工作溫度： | -25°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 6 電壓，單極 |
| 采樣率（每秒）： | 192k |
| 配用： | DEM-DAI1602-ND - EVAL FIXTURE FOR PCM1602 |
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f Frequency Hz
100
80
60
40
20
0
20
Level
dB
1
100
1k
10M
G019
10
10k
100k
1M
–
VCOM
OPA337
+
10
F
+
PCM1602A
S0054-05
15
4
3
1
V
BIAS +
V
CC
2
www.ti.com
SLES146A – AUGUST 2005 – REVISED OCTOBER 2010
ANALOG OUTPUTS
The PCM1602A includes six independent output channels, VOUT1 through VOUT6. These are unbalanced outputs,
each capable of driving 3.1 VPP typical into a 5-k ac load with VCC = 5 V. The internal output amplifiers for
VOUT1 through VOUT6 are dc biased to the common-mode (or bipolar zero) voltage, equal to VCC/2.
The output amplifiers include an RC continuous-time filter, which helps to reduce the out-of-band noise energy
present at the DAC outputs due to the noise-shaping characteristics of the PCM1602A delta-sigma DACs. The
frequency response of this filter is shown in Figure 28. By itself, this filter is not enough to attenuate the
out-of-band noise to an acceptable level for most applications. An external low-pass filter is required to provide
sufficient out-of-band noise rejection. Further discussion of DAC post-filter circuits is provided in the Application
Information section of this data sheet.
Figure 28. Output-Filter Frequency Response
VCOM OUTPUT
One unbuffered, common-mode voltage output pin, VCOM (pin 15), is brought out for decoupling purposes. This
pin is nominally biased to a dc voltage level equal to VCC/2. If this pin is to be used to bias external circuitry, a
voltage follower is required for buffering purposes. Figure 29 shows an example of using the VCOM pin for
external biasing applications.
Figure 29. Biasing External Circuits Using the VCOM Pin
Copyright 2005–2010, Texas Instruments Incorporated
29
Product Folder Link(s): PCM1602A
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