- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371180 > TDA1387T (NXP SEMICONDUCTORS) Stereo Continuous Calibration DAC CC-DAC PDF資料下載
參數(shù)資料
| 型號： | TDA1387T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | DAC |
| 英文描述： | Stereo Continuous Calibration DAC CC-DAC |
| 中文描述： | SERIAL INPUT LOADING, 0.2 us SETTLING TIME, 16-BIT DAC, PDSO8 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 140K |
| 代理商： | TDA1387T |
1995 Dec 11
5
Philips Semiconductors
Preliminary specification
Stereo Continuous Calibration DAC (CC-DAC)
TDA1387T
PINNING
SYMBOL
PIN
DESCRIPTION
BCK
WS
DATA
GND
V
DD
I
OL
REF
I
OR
1
2
3
4
5
6
7
8
bit clock input
word selection input
data input
ground
supply voltage input
left channel output
reference decoupling
right channel output
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The basic operation of the continuous calibration DAC is
illustrated in Fig.3 which shows the calibration and
operation cycle. During calibration of the MOS current
source (Fig.3a) transistor M1 is connected as a diode by
applying a reference current. The voltage V
gs
on the
intrinsic gate-source capacitance C
gs
of M1 is then
determined by the transistor characteristics. After the drain
current has been calibrated to the reference value I
ref
, the
switch S1 is opened and S2 is switched to the other
position (Fig.3b). The gate-to-source voltage V
gs
of M1 is
not changed because the charge on C
gs
is preserved.
Therefore, the drain current of M1 will still be equal to I
ref
and this exact duplication of I
ref
is now available at the
OUT terminal.
In the TDA1387T, 32 current sources and one spare
current source are continuously calibrated (see Fig.1). The
spare current source is included to allow continuous
converter operation. The output of one calibrated source is
connected to an 11-bit binary current divider which
consists of 2048 transistors. A symmetrical offset
decoding principle is incorporated and arranges the bit
switching such that the zero-crossing is performed by
switching only the LSB currents.
The TDA1387T (CC-DAC) accepts serial input data format
of 16-bit word length. Left and right data words are time
multiplexed. The input data format is shown in
Figs 4 and 5.
With a HIGH level on the WS input, data is placed in the
right input register, with a LOW level on the WS input, data
is placed in the left input register. The data in the input
registers are simultaneously latched to the output registers
which control the bit switches. An internal bias current I
bias
is added to the full scale output current I
FS
in order to
achieve maximum dynamic range at the outputs of OP1
and OP2.
The signal current I
FS
and the bias current I
bias
are both
proportional to the supply voltage V
DD
, and have a fixed
mutual relation A
bias
(where A
bias
= I
bias
/I
FS
).
It is preferred that the non-inverting input of operational
amplifiers OP1 and OP2 is tied to ground to achieve a
maximum dynamic range over the supply voltage range.
A decoupling capacitor C4 is recommended for enhancing
the supply voltage ripple rejection of the DAC. It has no
significant effect on the noise performance.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA1388M | CAP .0012UF 200V B SERIES POLY |
| TDA1388 | Bitstream continuous calibration filter-DAC for CD-ROM audio applications |
| TDA1388T | CAP .012UF 200V B SERIES POLY |
| TDA1388TZ | TRI SLMLNE 4 CONT RECT RANG AU |
| TDA1517A | 8 W BTL or 2 x 4 W SE power amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA1387TD-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Digital-to-Analog Converter |
| TDA1388 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Bitstream continuous calibration filter-DAC for CD-ROM audio applications |
| TDA1388M | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Bitstream continuous calibration filter-DAC for CD-ROM audio applications |
| TDA1388T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Bitstream continuous calibration filter-DAC for CD-ROM audio applications |
| TDA1388TZ | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Bitstream continuous calibration filter-DAC for CD-ROM audio applications |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。