參數(shù)資料
型號： DAC7744EC
元件分類： 外設(shè)及接口
英文描述： Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述： 單電源RS232C接口線路驅(qū)動器/接收器（單電源RS232C接口線收發(fā)器（2發(fā)2收））
文件頁數(shù)： 16/23頁
文件大小： 458K
代理商： DAC7744EC
16
DAC7744
FIGURE 1. DAC7744 Architecture.
FIGURE 2. Basic Single-Supply Operation of the DAC7744.
THEORY OF OPERATION
The DAC7744 is a quad voltage output, 16-bit digital-to-
analog converter (DAC). The architecture is an R-2R ladder
configuration with the three MSB’s segmented followed by
an operational amplifier that serves as a buffer. Each DAC
has its own R-2R ladder network, segmented MSBs and
output op amp (see Figure 1). The minimum voltage output
(zero scale) and maximum voltage output (full scale) are set
by the external voltage references (V
REF
L and V
REF
H, re-
spectively). The digital input is a 16-bit parallel word and
the DAC input registers offer a readback capability. The
converters can be powered from either a single +15V supply
or a dual
±
15V supply. The device offers a reset function
which immediately sets all DAC output voltages and DAC
registers to mid-scale code 8000
H
or to zero scale, code
0000
H
. See Figures 2 and 3 for the basic operation of the
DAC7744.
R
2R
2R
2R
2R
2R
2R
2R
2R
2R
V
REF
H
V
OUT
V
OUT
Sense
V
REF
H Sense
V
REF
L
V
REF
L Sense
R
F
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
0V to +10V
0V to +10V
0V to +10V
0V to +10V
+10.000V
+10.000V
+15V
0.1
μ
F
1
μ
F
+5V
0.1
μ
F
1
μ
F
+
+
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DAC7744EC/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
DAC7744EC/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
DAC7744ECG4 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
DAC7744EG4 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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