參數(shù)資料
型號(hào)： MAX5513EUA
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： DAC
英文描述： Dual, Ultra-Low-Power, 8-Bit, Voltage-Output DACs
中文描述： DUAL, PARALLEL, 8 BITS INPUT LOADING, 660 us SETTLING TIME, 8-BIT DAC, PDSO8
封裝： MO-187C-AA, MSOP-8
文件頁(yè)數(shù)： 18/23頁(yè)
文件大?。?/td> 1544K
代理商： MAX5513EUA
M
Voltage Biasing a
Current-Output Transducer
See the circuit in
Figure
5 for an illustration of how to
configure the MAX5514/MAX5515 to bias a current-out-
put transducer. In
Figure
5, the output voltage of the
MAX5514/MAX5515 is a function of the voltage drop
across the transducer added to the voltage drop
across the feedback resistor R.
Unipolar Output
Figure
6 shows the MAX5514 in a unipolar output con-
figuration with unity gain.
Table
4 lists the unipolar out-
put codes.
Bipolar Output
The MAX5514 output can be configured for bipolar
operation as shown in
Figure
7. The output voltage is
given by the following equation:
V
OUT_
= V
REFIN
x [(N
A
- 128) / 128]
where N
A
represents the decimal value of the DAC’s
binary input code.
Table
5 shows the digital codes (off-
set binary) and the corresponding output voltage for
the circuit in
Figure
7.
Configurable Output Gain
The MAX5514/MAX5515 have force-sense outputs,
which provide a connection directly to the inverting ter-
minal of the output op amp, yielding the most flexibility.
The advantage of the force-sense output is that specific
gains can be set externally for a given application. The
gain error for the MAX5514/MAX5515 is specified in a
unity-gain configuration (op-amp output and inverting
terminals connected), and additional gain error results
from external resistor tolerances. Another advantage of
the force-sense DAC is that it allows many useful circuits
to be created with only a few simple external components.
An example of a custom fixed gain using the MAX5514/
MAX5515 force-sense output is shown in
Figure
9. In
this example, R1 and R2 set the gain for V
OUTA
.
V
OUTA
= [(V
REFIN
x N
A
) / 256] x [1 + (R2 / R1)]
where N
A
represents the numeric value of the DAC
input code.
Dual, Ultra-Low-Power,
8-Bit, Voltage-Output DACs
18
______________________________________________________________________________________
Table
4. Unipolar Code
Table
(Gain = +1)
DAC CONTENTS
MSB
1111
1111
1000
0001
1000
0000
0111
1111
0000
0001
0000
0000
LSB
0000
0000
0000
0000
0000
0000
ANALOG OUTPUT
+V
REF
(255/256)
+V
REF
(129/256)
+V
REF
(128/256) = +V
REF
/2
+V
REF
(127/256)
+V
REF
(1/256)
0V
Table
5. Bipolar Code
Table
(Gain = +1)
DAC CONTENTS
MSB
1111
1111
1000
0001
1000
0000
0111
1111
0000
0001
0000
0000
LSB
0000
0000
0000
0000
0000
0000
ANALOG OUTPUT
+V
REF
(127/128)
+V
REF
(1/128)
0V
-V
REF
(1/128)
-V
REF
(127/128)
-V
REF
(128/128) = -V
REF
N
A
IS THE DAC_ INPUT CODE
(0 TO 255 DECIMAL).
REFIN
MAX5514
OUT_
FB_
OUT
= V
REFIN
×
N
A
V
DAC
Figure
6. Unipolar Output Circuit
REFIN
1/2 MAX5514
OUT_
V
OUT
FB_
V+
10k
10k
V-
DAC
Figure
7. Bipolar Output Circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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MAX5513EUA+T 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-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
MAX5513EUA-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
MAX5514ETC 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
MAX5514ETC+ 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-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
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