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參數(shù)資料
| 型號： | MAX5170AEEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | Low-Power, Serial, 14-Bit DACs with Voltage Output |
| 中文描述： | SERIAL INPUT LOADING, 18 us SETTLING TIME, 14-BIT DAC, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 241K |
| 代理商： | MAX5170AEEE |
M
Low-Power, S erial, 14-Bit DACs
with Voltage Output
14
______________________________________________________________________________________
Offset and Buffer Configurations
The simple circuit of Figure 7 illustrates how to intro-
duce an offset to the output voltage. The amount of off-
set introduced by a voltage at the OS pin is shown in
the following equation:
V
OFFSET
= V
OS
·
(1 - Gain)
where Gain = 1.638. However, the total output voltage
of the device cannot exceed V
DD
regardless of the volt-
age on the OS pin.
To set the gain of the output amplifier to 1, connect OS
to OUT.
Daisy-Chaining Devices
The serial data output pin (DOUT) allows multiple
MAX5170/MAX5172s to be daisy-chained together, as
shown in Figure 9. The advantage of this is that only two
lines are needed to control all the DACs on the line. The
disadvantage is that it takes ncommands to program the
DACs. Figure 10 shows several MAX5170/MAX5172s
sharing one common DIN signal line. In this configura-
tion, the data bus is common to all devices. However,
more I/O lines are required for this configuration because
each device requires a dedicated
CS
line. The advan-
tage of this configuration is that only one command is
needed to program any DAC.
Using an AC Reference
The MAX5170/MAX5172 accepts reference voltages with
AC components as long as the reference voltage
remains between 0 and V
DD
- 1.4V. Figure 11 shows a
technique for applying an offset sine wave signal to REF.
The reference voltage must remain above AGND.
Power-Supply and Layout Considerations
Wire-wrap boards are not recommended. For optimum
system performance, use printed circuit boards with
separate analog and digital ground planes. Connect the
two ground planes together at the low-impedance
power-supply source. Connect DGND and AGND pins
together at the IC. The best ground connection is
achieved by connecting the DAC’s DGND and AGND
pins together and connecting that point to the system
analog ground plane. This is useful because if the DAC’s
DGND is connected to the system digital ground, digital
noise may get through to the DAC’s analog portion.
Bypass the power supply with a 4.7μF capacitor in paral-
lel with a 0.1μF capacitor to AGND. Minimize their lead
lengths to reduce inductance. If noise becomes an
issue, use shielding and/or ferrite beads to increase iso-
lation.
To maintain INL and DNL performance as well as gain
drift, it is extremely important to provide the lowest possi-
ble reference output impedance at the DAC reference
input pin. INL degrades if the series resistance on REF
pin exceeds 0.1
. The same consideration must be
made for the AGND pin.
TOOTHER
SERIAL DEVICES
MAX5170
MAX5172
DIN
SCLK
CS
MAX5170
MAX5172
MAX5170
MAX5172
DIN
DOUT
DOUT
DOUT
SCLK
CS
DIN
SCLK
CS
Figure 9. Daisy-Chaining MAX5170/MAX5172 Devices
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5170BEEE | Low-Power, Serial, 14-Bit DACs with Voltage Output |
| MAX5172AEEE | Low-Power, Serial, 14-Bit DACs with Voltage Output |
| MAX5172BEEE | Low-Power, Serial, 14-Bit DACs with Voltage Output |
| MAX5170 | Low-Power, Serial, 14-Bit DACs with Voltage Output |
| MAX5172 | Low-Power, Serial, 14-Bit DACs with Voltage Output |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5170AEEE+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 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 |
| MAX5170AEEE+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 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 |
| MAX5170AEEE-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 |
| MAX5170BEEE | 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 |
| MAX5170BEEE+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 14-Bit 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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