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參數(shù)資料
| 型號(hào)： | DAC8832ICRGY |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter |
| 中文描述： | 16位，超低功耗，電壓輸出數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 19/26頁 |
| 文件大?。?/td> | 702K |
| 代理商： | DAC8832ICRGY |
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OUTPUT AMPLIFIER SELECTION
For bipolar mode, a precision amplifier should be used, supplied from a dual power supply. This provides the
±
V
REF
output.
In a single-supply application, selection of a suitable operational amplifier may be more difficult because the
output swing of the amplifier does not usually include the negative rail; in this case, AGND. This output swing
can result in some degradation of the specified performance unless the application does not use codes near 0.
The selected operational amplifier needs to have low-offset voltage (the DAC LSB is 38
μ
V with a 2.5 V
reference), eliminating the need for output offset trims. Input bias current should also be low because the bias
current multiplied by the DAC output impedance (approximately 6.25 k
) adds to the zero-code error.
Rail-to-rail input and output performance is required. For fast settling, the slew rate of the operational amplifier
should not impede the settling time of the DAC. Output impedance of the DAC is constant and
code-independent, but in order to minimize gain errors the input impedance of the output amplifier should be as
high as possible. The amplifier should also have a 3 dB bandwidth of 1 MHz or greater. The amplifier adds
another time constant to the system, thus increasing the settling time of the output. A higher 3 dB amplifier
bandwidth results in a shorter effective settling time of the combined DAC and amplifier.
REFERENCE AND GROUND
Since the input impedance is code-dependent, the reference pin should be driven from a low impedance source.
The DAC8832 operates with a voltage reference ranging from 1.25 V to V
DD
. References below 1.25 V result in
reduced accuracy.
POWER SUPPLY AND REFERENCE BYPASSING
For accurate high-resolution performance, it is recommended that the reference and supply pins be bypassed
with a 10
μ
F tantalum capacitor in parallel with a 0.1
μ
F ceramic capacitor.
DAC8832
SBAS380A–FEBRUARY 2006–REVISED APRIL 2006
The DAC full-scale output voltage is determined by the reference.
Table 1
and
Table 2
outline the analog output
voltage for particular digital codes.
For optimum performance, Kelvin sense connections are provided. If the application does not require separate
force and sense lines, they should be tied together close to the package to minimize voltage drops between the
package leads and the internal die.
19
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC8832ICRGYR | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output 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 |
| DAC8832ICRGYRG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output 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 |
| DAC8832ICRGYT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output 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 |
| DAC8832ICRGYTG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output 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 |
| DAC8832IRGY | 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter |
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