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參數(shù)資料
| 型號： | PCM63P |
| 英文描述： | Colinear⑩ 20-Bit Monolithic Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 共線⑩20位單片音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 254K |
| 代理商： | PCM63P |
8
PCM63P
INSTALLATION
POWER SUPPLIES
Refer to Figure 4 for proper connection of the PCM63P in
the voltage-out mode using the internal feedback resistor.
The feedback resistor connections (P9 and P10) should be
left open if not used. The PCM63P only requires a
±
5V
supply. Both positive supplies should be tied together at a
single point. Similarly, both negative supplies should be
connected together. No real advantage is gained by using
separate analog and digital supplies. It is more important that
both these supplies be as “clean” as possible to reduce
coupling of supply noise to the output. Power supply decou-
pling capacitors should be used at each supply pin to
maximize power supply rejection, as shown in Figure 4,
regardless of how good the supplies are. Both commons
should be connected to an analog ground plane as close to
the PCM63P as possible.
FILTER CAPACITOR REQUIREMENTS
As shown in Figure 4, various size decoupling capacitors
can be used, with no special tolerances being required. The
size of the offset decoupling capacitor is not critical either,
with larger values (up to 100
μ
F) giving slightly better SNR
readings. All capacitors should be as close to the appropriate
pins of the PCM63P as possible to reduce noise pickup from
surrounding circuitry.
MSB ADJUSTMENT CIRCUITRY
Near optimum performance can be maintained at all signal
levels without using the optional MSB adjust circuitry of the
PCM63P shown in Figure 5. Adjustability is provided for
those cases where slightly better full-scale THD+N is
desired. Use of the MSB adjustments will only affect larger
dynamic signals (between 0dB and –6dB). This improve-
ment comes from bettering the gain match between the
upper and lower DACs at these signal levels. The change is
realized by small adjustments in the bit-2 weights of each
DAC. Great care should be taken, however, as improper
adjustment will easily result in degraded performance.
In theory, the adjustments would seem very simple to
perform, but in practice they are actually quite complex. The
first step in the theoretical procedure would involve making
each bit-2 weight ideal in relation to its code minus one
value (adjusting each potentiometer for zero differential
nonlinearity error at the bit-2 major carries). This would be
the starting point of each 100k
potentiometer for the next
adjustment. Then, each potentiometer would be adjusted
equally, in opposite directions, to achieve the lowest full-
scale THD+N possible (reversing the direction of rotation
FIGURE 5. Optional Bit-2 Adjustment Circuitry.
0.1μF
330k
330k
0.1μF
100k
100k
28
25
24
23
–V
V
LB2 Adj
UB2 Adj
A
FIGURE 4. Connection Diagram.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CAP
+V
CAP
CAP
BPO
I
ACOM
NC
RF
RF
–V
DCOM
+V
NC
–V
NC
NC
V
LB2 Adj
UB2 Adj
NC
DATA
LE
NC
CLK
NC
NC
NC
PCM63P
A
1μF
0.1μF
4.7μF
+
1μF
1μF
1/2
OPA2604
OUT
1
2
D
D
A
1μF
0.1μF
0.1μF
–5V
+5V
0.1μF
±3V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCM63P-J | Colinear⑩ 20-Bit Monolithic Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM63P-K | Colinear⑩ 20-Bit Monolithic Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM64D | 18-Bit Digital-to-Analog Converter |
| PCM67 | Advanced 1-Bit BiCMOS Dual 18-Bit DIGITAL-TO-ANALOG CONVERTER |
| PCM67P | Advanced 1-Bit BiCMOS Dual 18-Bit DIGITAL-TO-ANALOG CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM63P-J | 制造商:BB 制造商全稱:BB 功能描述:Colinear⑩ 20-Bit Monolithic Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM63P-K | 制造商:BB 制造商全稱:BB 功能描述:Colinear⑩ 20-Bit Monolithic Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM63P-K-2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Colinear 20-Bit Monolithic Audio IGITAL-TO-ANALOG CONVERTER |
| PCM-64 | 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 |
| PCM64D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:18-Bit Digital-to-Analog Converter |
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