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參數(shù)資料
| 型號： | DAC7742 |
| 英文描述： | 16-Bit, Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface |
| 中文描述： | 16位，單通道數(shù)字到模擬轉(zhuǎn)換器，具有內(nèi)部參考和并行接口 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大小： | 376K |
| 代理商： | DAC7742 |
DAC7742
SBAS256
11
www.ti.com
THEORY OF OPERATION
The DAC7742 is a voltage output, 16-bit DAC with a +10V built-
in internal reference. The architecture is an R-2R ladder con-
figuration with the three MSBs segmented, followed by an
operational amplifier that serves as a buffer, as shown in Figure
1. The output buffer is designed to allow user-configurable
output adjustments giving the DAC7742 output voltage ranges
of 0V to +10V,
–
5V to +5V, or
–
10V to +10V. Please refer to
Figures 2, 3, and 4 for pin configuration information.
The digital input is a parallel word made up of the 16-bit DAC
code and is loaded into the DAC register using the
LDAC
input pin. The converter can be powered from
±
12V to
±
15V
dual analog supplies and a +5V logic supply. The device
offers a reset function, which immediately sets the DAC
output voltage and DAC register to min-scale (code FFFF
H
)
or mid-scale (code 7FFF
H
). The data I/O and reset functions
are discussed in more detail in the following sections.
FIGURE 1. DAC7742 Architecture.
FIGURE 2. Basic Operation: V
OUT
= 0V to +10V.
2R
2R
2R
2R
2R
2R
2R
2R
2R
R/4
R/2
R/2
R/4
R/4
R
R
OFFSET
RFB2
RFB1
SJ
V
OUT
V
REF
V
REF
AGND
REF
IN
REF
ADJ
REF
OUT
+10V Internal
Reference
Buffer
1
μ
F
0.1
μ
F
V
DD
1
μ
F
0.1
μ
F
V
SS
1
μ
F
0.1
μ
F
V
CC
Control Bus
Data Bus
Data Bus
3
3
3
3
3
3
3
2
2
2
2
2
N
D
D
D
D
D
D
D
D
D
T
N
DGND
V
DD
RST
LDAC
CS
R/W
RSTSEL
REFEN
REF
OUT
REFADJ
REF
IN
NC
NC
NC
DB6
DB5
DB4
DB3
DB2
DB1
DB0
NC
NC
NC
1
2
3
4
5
6
7
8
9
1
1
1
N
V
S
V
C
V
R
R
O
A
A
R
R
S
V
O
N
4
4
4
4
4
4
4
4
4
3
3
1
1
1
1
1
1
1
2
2
2
2
3
2
DAC7742
(0V to +10V)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC7742Y/250 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Single Ch. Parallel Ifc 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC7742Y/250G4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Sgl Channel Parallel Interface 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC7742Y/2K | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Single Ch. Parallel Ifc 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC7742Y/2KG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Single Ch. Parallel Ifc 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC7742YB/250 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit Single Ch. Parallel Ifc 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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