參數(shù)資料
型號(hào)： AD5744
廠商： Analog Devices, Inc.
英文描述： Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
中文描述： 完整，四路，14/16-Bit，高精度，串行輸入，雙極性電壓輸出DAC
文件頁(yè)數(shù)： 23/27頁(yè)
文件大?。?/td> 243K
代理商： AD5744
Preliminary Technical Data
APPLICATIONS INFORMATION
TYPICAL OPERATING CIRCUIT
Figure 11 shows the typical operating circuit for the
AD5744/64. The only external components needed for this
precision 14/16-bit DAC are decoupling capacitors on the
supply pins, R-C connection from REFOUT to REFAB and
REFCD and a short circuit current setting resistor. Because the
device incorporates a voltage reference, and reference buffers, it
eliminates the need for an external bipolar reference and
associated buffers. This leads to an overall saving in both cost
and board space.
Rev. PrA 15-Nov-04| Page 23 of 27
In the circuit below, VDD and VSS are both connected to ±15 V,
but VDD and VSS can operate with supplies from ±11.4 V to
±16.5 V. In Figure 11, AGNDA is connected to REFGND, but
the option of Force/Sense is included on this device, if required
by the user.
1
2
3
4
5
6
7
8
23
22
21
18
19
20
24
17
9
10 11
12
13 14 15
16
32
31
30
29
28 27
26
25
AD5744/64
SYNC
SCLK
SDIN
SDO
D0
D1
LDAC
CLR
VOUTA
VOUTB
AGNDB
AGNDC
VOUTD
VOUTC
AGNDA
AGNDD
R
R
D
D
A
P
A
I
B
A
A
T
R
R
R
R
SYNC
SCLK
SDIN
SDO
LDAC
D0
D1
RSTOUT
RSTIN
BIN/2SCOMP
+5V
+5V +15V -15V
+15V -15V
VOUTA
VOUTB
VOUTC
VOUTD
6k
100 nF
1
1
1
10 μF
10 μF
100 nF
100 nF
10 μF
10 μF
1
3
TEMP
Figure 11. Typical operating circuit
Precision Voltage Reference Selection
To achieve the optimum performance from the AD5744/64 over
it’s full operating temperature range an external voltage
reference must be used. Thought should be given to the
selection of a precision voltage reference. The AD5744/64 has
two reference inputs, REFAB and REFCD. The voltages applied
to the reference inputs are used tomprovide a buffered positiver
and negative reference for the DAC cores. Therefore, any error
in the voltage reference is reflected in the outputs of the device.
There are four possible sources of error to consider when
choosing a voltage reference for high accuracy applications:
initial accuracy, temperature coefficient of the output voltage,
long term drift and output voltage noise.
Initial accuracy error on the output voltage of an external
reference could lead to a full-scale error in the DAC. Therefore,
to minimize these errors, a reference with low initial accuracy
error specification is preferred. Also, choosing a reference with
an output trim adjustment, such as the ADR425, allows a
system designer to trim system errors out by setting the
reference voltage to a voltage other than the nominal. The trim
adjustment can also be used at temperature to trim out any
error.
Long term drift is a measure of how much the reference output
voltage drifts over time. A reference with a tight lon-term drift
specification ensures that the overall solution remains relatively
stable over its entire lifetime.
The temperature coefficient of a reference’s output voltage
affects INL, DNL and TUE. A reference with a tight
tempaerature coefficient specifiaction should be chosen to
reduce the dependence of the DAC output voltage on ambient
conditions.
In high accuracy applications, which have a relatively low noise
budget, reference output voltage noise needs to be considered.
Choosing a reference waith as low an output noise voltage as
practical for the system resolution required is important.
Precision voltage references such as the ADR435 (XFET design)
produce low output noise in the 0.1 Hx to 10 Hz region.
However, as the circuit bandwidth increases, filtering the output
of the reference may be required to minimise the output noise.
Table 20. Partial List of Precision References Recommended for
use with the AD5744/64
Part No.
ADR435
ADR425
ADR02
ADR395
AD586
Initial
Accuracy
(mV max)
± 6
± 6
± 5
± 6
± 2.5
Long-Term
Drift
(ppm typ)
30
50
50
50
15
Temp Drift
(ppm/
°C max)
3
3
3
25
10
0.1
Hz to
10 Hz Noise
(μV p-p typ)
3.4
3.4
15
5
4
相關(guān)PDF資料
PDF描述
AD5744ASU Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5744BSU Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5744CSU Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5754R Quad 12-Bit Serial Input Unipolar/Bipolar Voltage Output DAC
AD5725 Quad 12-Bit Serial Input Unipolar/Bipolar Voltage Output DAC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD5744ASU 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5744BSU 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5744CSU 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete, Quad, 14/16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5744R 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete Quad, 14-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
AD5744R_08 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete Quad, 14-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*