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參數(shù)資料
| 型號(hào)： | MAX5231 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3V/5V, 12-Bit, Serial Voltage-Output Dual DACs with Internal Reference |
| 中文描述： | 3V/5V、12位、串行電壓輸出、雙路DAC，內(nèi)置電壓基準(zhǔn) |
| 文件頁(yè)數(shù)： | 15/18頁(yè) |
| 文件大?。?/td> | 974K |
| 代理商： | MAX5231 |
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Digital Feedthrough
Digital feedthrough is noise generated on the DAC
’
s
output when any digital input transitions. Proper board
layout and grounding significantly reduce this noise,
but there is always some feedthrough caused by the
DAC itself.
Unipolar Output
Figure 7 shows the MAX5230/MAX5231 configured for
unipolar, rail-to-rail operation. The MAX5231 produces
a 0 to 4.095V output, while the MAX5230 produces 0 to
2.0475V output. Table 4 lists the unipolar output codes.
Digital Calibration and
Threshold Selection
Figure 8 shows the MAX5230/MAX5231 in a digital cali-
bration application. With a bright light value applied to
the photodiode (on), the DAC is digitally ramped until 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 read-
ers, and liquid clarity analysis.
Sharing a Common DIN Line
Several MAX5230/MAX5231s may share one common
DIN signal line (Figure 9). In this configuration, the data
bus is common to all devices; data is not shifted through
a daisy-chain. The SCLK and DIN lines are shared by all
devices, but each IC needs its own dedicated
CS
line.
Daisy-Chaining Devices
Any number of MAX5230/MAX5231s can be daisy-
chained by connecting the serial data output (DOUT) of
one device to the digital input (DIN) of the following
device in the chain (Figure 10).
M
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
______________________________________________________________________________________
15
Table 4. Unipolar Code Table
DAC CONTENTS
MSB
1111 1111 1
1000 0000 0
1000 0000 0
0111 1111 1
0000 0000
0000 0000 0
ANALOG OUTPUT (V)
MAX5230
2.04750
1.02425
1.02375
1.02325
0.00050
0
LSB
111 (0)
001 (0)
000 (0)
111 (0)
001 (0)
000 (0)
MAX5231
4.0950
2.0485
2.0475
2.0465
0.0010
0
DAC_
MAX5230
MAX5231
REF
REF
V
DD
5V/3V
GAIN = 1.6384V/V
OUT_
OS_
121k
77.25k
1k
AGND
DGND
Figure 7. Unipolar Output Circuit (Rail-to-Rail)
DAC_
MAX5230
MAX5231
REF
REF
V
DD
V
OUT
5V/3V
OUT_
PHOTODIODE
OS_
V+
V+
V-
121k
77.25k
1k
R
PULLDOWN
AGND
DGND
Figure 8. Digital Calibration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5231AEEE | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 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(shí)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 |
| MAX5231AEEE+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 2Ch Precision DAC 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(shí)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 |
| MAX5231AEEE+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 2Ch Precision DAC 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(shí)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 |
| MAX5231AEEE-T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 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(shí)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 |
| MAX5231BEEE | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 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(shí)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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