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PDF PCM58P Data sheet ( Hoja de datos )
| Número de pieza | PCM58P | |
| Descripción | Precision/ 18-Bit Monolithic Audio DIGITAL-TO-ANALOG CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PCM58P (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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® PCM58P
Precision, 18-Bit Monolithic Audio
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q 18-BIT MONOLITHIC AUDIO D/A
CONVERTER
q VERY LOW MAX THD+N: –96dB Without
External Adjustment; PCM58P-K
q SERIAL INPUT FORMAT 100%
COMPATIBLE WITH INDUSTRY STD
16-BIT PCM56P
q VERY FAST SETTLING, GLITCH-FREE
CURRENT OUTPUT (200ns)
q LOW-NOISE SCHMITT TRIGGER LOGIC
INPUT CIRCUITRY
q COMPLETE WITH REFERENCE
q RELIABLE PLASTIC 28-PIN DIP
PACKAGE
DESCRIPTION
The PCM58P is a complete, precision 18-bit digital-
to-analog converter with ultra-low distortion over a very
wide frequency range. The latched serial input data
format of the PCM58P is totally based on the widely
successful 16-bit PCM56P format (with the addition of
two more data bits). The PCM58P features a very low
noise and fast settling current output.
The PCM58P comes in a 28-pin plastic DIP package.
A provision is made for external adjustment of the four
MSBs to further improve the PCM58P’s specifications,
if desired. Applications include very low distortion
frequency synthesis and high-end consumer and pro-
fessional digital audio applications.
Clock
Latch Enable
Data
Control
Logic
Reference
18-Bit
IOUT DAC
Serial-to-Parallel
Shift Register
VREF
MSB Adj
IOUT
RF
RF
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PCM58P©1988 Burr-Brown Corporation
PDS-868A
Printed in U.S.A. October, 1993
1 page  
“STOPPED-CLOCK” OPERATION
The PCM58P is normally operated with a continuous clock
input signal. If the clock is to be stopped in between input
data words, the last 18-bits shifted in are not actually shifted
from the serial register to the latched parallel DAC register
until LE (latch enable) goes low. If the clock input (P16,
CLK) is stopped between data words, LE (P17) must remain
low until after the first clock cycle of the next data word
to insure proper DAC operation. In either case, the setup and
hold times for DATA and LE must still be observed as shown
in Figure 3.
INSTALLATION
Refer to Figure 4 for proper connection of the PCM58P in
the voltage-out mode using the internal feedback resistor.
The feedback resistor connections (P7 and P10) should be
connected to ACOM (P8) if not used. The PCM58P requires
only a +5V and –12V supply. It is very important that these
supplies be as “clean” as possible to reduce coupling of supply
noise to the output. Power supply decoupling capacitors
shown in Figure 4 should be used, regardless of how good
the supplies are to maximize power supply rejection. All
grounds should be connected to the analog ground plane as
close to the PCM58P as possible.
Data
Input
>40ns
LSB
Clock
Input
>15ns >15ns
>40ns
>40ns
>100ns
Latch
Enable
>One Clock Cycle
MSB
>5ns
>15ns
>One Clock Cycle
FIGURE 3. PCM58P Setup and Hold Timing Diagram.
FILTER CAPACITOR REQUIREMENTS
As shown in Figure 4, other various decoupling capacitors
are required around the supply and reference points with no
special tolerances being required. Placement of all capacitors
should be as close to the appropriate pins of the PCM58P
as possible to reduce noise pickup from surrounding circuitry.
+5V
Optional External Op-Amp
Burr-Brown
OPA602BP
3.3µF
+
NOTE: Connect P7 and P10 to P8
(ACOM) if internal feedback resis-
tor is not used
3.3µF
+
0.1µF
+
1 CAP
0.1µF
+
+
0.1µF
2 +VCC
3 CAP
4 CAP
5 BPO
6 IOUT
7 RF1
8 ACOM
9 –VCC
10 RF2
11 DCOM
12 NC
13 +VCC
14 NC
FIGURE 4. PCM58P Connection Diagram.
VPOT 28
Bit Adj (MSB) 27
Bit Adj (B2) 26
Bit Adj (B3) 25
Bit Adj (B4) 24
NC 23
NC 22
RF NC 21
3kΩ
–VCC 20
DATA 19
NC 18
LE 17
CLK 16
CAP 15
1kΩ 100kΩ 1kΩ
330kΩ
330kΩ
330kΩ
330kΩ
Optional
Bit
Adjust
Circuit
3.3µF
+
+
0.1µF
–12V
®
5 PCM58P
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet PCM58P.PDF ] | |
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