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參數(shù)資料
| 型號： | MAX5155BMJE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | Low-Power, Dual, 12-Bit Voltage-Output DACs with Serial Interface |
| 中文描述： | DUAL, SERIAL INPUT LOADING, 16 us SETTLING TIME, 12-BIT DAC, CDIP16 |
| 封裝： | 0.300 INCH, CERDIP-16 |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 184K |
| 代理商： | MAX5155BMJE |
it trips the comparator. The microprocessor (μP) stores
this “high” calibration value. Repeat the process with a
dim light (off) to obtain the dark current calibration.
The μP then programs the DAC to set an output voltage
at the midpoint of the two calibrated values.
Applications include tachometers, motion sensing,
automatic readers, and liquid clarity analysis.
Digital Control of Gain and Offset
The two DACs can be used to control the offset and
gain for curve-fitting nonlinear functions, such as trans-
ducer linearization or analog compression/expansion
applications. The input signal is used as the reference
for the gain-adjust DAC, whose output is summed with
the output from the offset-adjust DAC. The relative
weight of each DAC output is adjusted by R1, R2, R3,
and R4 (Figure 14).
Power-S upply Considerations
On power-up, the input and DAC registers clear (set to
zero code). For rated performance, V
REF_
should be at
least 1.4V below V
DD
. Bypass the power supply with a
4.7μF capacitor in parallel with a 0.1μF capacitor to
AGND. Minimize lead lengths to reduce lead inductance.
Grounding and Layout Considerations
Digital and AC transient signals on AGND can create
noise at the output. Connect AGND to the highest quality
ground available. Use proper grounding techniques,
such as a multilayer board with a low-inductance ground
plane. Carefully lay out the traces between channels to
reduce AC cross-coupling and crosstalk. Wire-wrapped
boards and sockets are not recommended. If noise
becomes an issue, shielding may be required.
M
Low-Power, Dual, 12-Bit Voltage-Output DACs
with S erial Interfac e
______________________________________________________________________________________
15
AGND
DGND
MAX5154
MAX5155
DACA
V
DD
REFA
V
IN
V
REF
CS
SCLK
DIN
REFB
R1
R3
R
R
R
R
R4
R2
OUTB
OSB
OUTA
OSA
V
OUT
DACB
INPUT
REG A
INPUT
REG B
DAC
REG A
DAC
REG B
– OFFSET
[ ]
(
V
IN
)(
)(
1+
) (
V
REF
)( )
[ ] [ ]
V
OUT
=
=
GAIN
2NA
4096
NA IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACA.
NB IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACB.
R2
R1+R2
R4
R3
2NB
4096
R4
R3
SHIFT
REGISTER
Figure 14. Digital Control of Gain and Offset
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5155MJEE | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Converter IC |
| MAX5156 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述: |
| MAX5156ACEE | 功能描述:數(shù)模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率: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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| MAX5156ACEE+T | 功能描述:數(shù)模轉換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率: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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