參數(shù)資料
型號： DAC7744
英文描述： 16-Bit, Quad Voltage Output DIGITAL-TO-ANALOG CONVERTER
中文描述： 16位四路電壓輸出數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù)： 17/23頁
文件大?。?/td> 458K
代理商： DAC7744
17
DAC7744
ANALOG OUTPUTS
When V
SS
= –15V (dual supply operation), the output ampli-
fier can swing to within 4V of the supply rails, guaranteed
over the –40
°
C to +85
°
C temperature range. With V
SS
= 0V
(single-supply operation), and with R
LOAD
also connected to
ground, the output can swing to ground. Care must also be
taken when measuring the zero-scale error when V
SS
= 0V.
Since the output voltage cannot swing below ground, the
output voltage may not change for the first few digital input
codes (0000
H
, 0001
H
, 0002
H
, etc.), if the output amplifier has
a negative offset. At the negative limit of –5mV, the first
specified output starts at code 0021
H
.
Due to the high accuracy of these D/A converters, system
design problems such as grounding and contact resistance
become very important. A 16-bit converter with a 10V full-
scale range has a 1LSB value of 152
μ
V. With a load current
of 1mA, series wiring and connector resistance of only
150m
(R
W2
) will cause a voltage drop of 150
μ
V, as shown
in Figure 4. To understand what this means in terms of a
system layout, the resistivity of a typical 1 ounce copper-clad
printed circuit board is 1/2 m
per square. For a 1mA load,
a 20 milli-inch wide printed circuit conductor 6 inches long
will result in a voltage drop of 150
μ
V.
The DAC7744 offers a force and sense output configuration
for the high open-loop gain output amplifiers. This feature
allows the loop around the output amplifier to be closed at
the load, thus ensuring an accurate output voltage, as shown
in Figure 4.
FIGURE 3. Basic Dual-Supply Operation of the DAC7744.
FIGURE 4. Analog Output Closed-Loop Configuration
(1/2 DAC7744). R
W
represents wiring resis-
tances.
DB15 (MSB)
DB14
DB13
DB12
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0 (LSB)
RSTSEL
RST
LOADDACS
R/W
A1
A0
CS
DGND
NC
NC
NC
NC
V
OUT
A Sense
V
OUT
A
V
REF
L AB Sense
V
REF
L AB
V
REF
H AB
V
REF
H AB Sense
V
OUT
B Sense
V
OUT
B
V
OUT
C Sense
V
OUT
C
V
REF
H CD Sense
V
REF
H CD
V
REF
L CD
V
REF
L CD Sense
V
OUT
D Sense
V
OUT
D
V
SS
AGND
V
CC
V
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
DAC7744
Reset DACs
Data
Bus
Address
Load DAC Registers
READ/WRITE
Chip Select
NC = No Connection
–10V to +10V
–10V
–10V to +10V
–10V to +10V
–10V to +10V
+10V
+10V
–10V
+5V
–15V
0.1
μ
F
1
μ
F
+15V
0.1
μ
F
1
μ
F
+5V
0.1
μ
F
1
μ
F
+
+
+
NC
NC
NC
NC
V
OUT
A Sense
V
OUT
A
V
REF
L AB Sense
V
REF
L AB
V
REF
H AB
V
REF
H AB Sense
V
OUT
B Sense
V
OUT
B
48
47
46
45
44
43
42
41
40
39
38
37
DAC7744
R
W1
R
W2
+10V
+V
V
OUT
R
W1
R
W2
V
OUT
R
LOAD
R
LOAD
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DAC7744E 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC7744E 制造商:Texas Instruments 功能描述:IC 16BIT DAC SMD 7744 SSOP48 制造商:Texas Instruments 功能描述:IC, 16BIT DAC, SMD, 7744, SSOP48 制造商:Texas Instruments 功能描述:IC, 16BIT DAC, SMD, 7744, SSOP48; Resolution (Bits):16bit; Sampling Rate:100kSPS; Input Channel Type:Parallel; Supply Voltage Range:4.75V to 5.25V, 14.25V to 15.75V; Digital IC Case Style:SSOP; No. of Pins:48; Data ;RoHS Compliant: Yes
DAC7744E/1K 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC7744E/1KG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC7744EB 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Quad Voltage Output RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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