參數(shù)資料
型號(hào)： TDA1310A
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 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, PDIP8
封裝： PLASTIC, SOT-96DE, DIP-8
文件頁(yè)數(shù)： 5/16頁(yè)
文件大?。?/td> 115K
代理商： TDA1310A
May 1994
5
Philips Semiconductors
Preliminary specification
Stereo Continuous Calibration DAC
(CC-DAC)
TDA1310A
PINNING
SYMBOL
PIN
DESCRIPTION
BCK
WS
DATA
GND
V
DD
I
OL
I
ref
I
OR
1
2
3
4
5
6
7
8
bit clock input
word select input
data input
ground
supply voltage
left channel output
reference input
right channel output
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The basic operation of the continuous calibration DAC is
illustrated in Fig.3. The figure 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
calibration of the drain current 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 duplicate of I
ref
is now available at the OUT
terminal.
The 32 current sources and the spare current source of the
TDA1310A 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 consisting of
2048 transistors. A symmetrical offset decoding principle
is incorporated and arranges the bit switching in such a
way that the zero-crossing is performed only by switching
the LSB currents.
The TDA1310A (CC-DAC) accepts serial input data
formats of 16-bit word length. Left and right data words are
time multiplexed. The most significant bit (bit 1) must
always be first. The input data format is shown in
Figs 4 and 5.
With a HIGH level on the word select input (WS), data is
placed in the left input register, with a LOW level on the
WS input, data is placed in the right input register
(see Fig.1). The data in the input registers are
simultaneously latched in 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 the maximum
dynamic range at the outputs OP1 and OP2 in Fig.1.
The reference input current I
ref
controls with gain G
FS
, the
current I
FS
which is a sink current and with gain G
bias
the
I
bias
which is a source current
(1)
.
The current I
ref
is proportional to V
DD
so the I
FS
and the I
bias
will be proportional to V
DD
as well
(2)
because G
FS
and G
bias
are constant.
The reference voltage V
ref
in Fig.1 is
2
3
V
DD
. In this way
maximum dynamic range is achieved over the entire
power supply voltage range.
The tolerance of the reference input current in Fig.1
depends on the tolerance of the resistors R3, R4
and R
ref(3)
.
(1) I
FS
= G
FS
x I
ref
and I
bias
= G
bias
x I
ref
(2)
(3)
V
DD2
V
I
FS2
I
I
bias2
I
=
=
I
ref
I
ref
V
R4
+
R3
R3
R4
R
ref
R
ref
+
+
+
+
-------------------------------------------------------------------------------------------------
–
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA1310AT 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Stereo Continuous Calibration DAC CC-DAC
TDA13110 制造商:TE Connectivity 功能描述:
TDA1311A 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Stereo Continuous Calibration DAC CC-DAC
TDA1311AT 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Stereo Continuous Calibration DAC CC-DAC
TDA1312 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Stereo continuous calibration DAC CC-DAC
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