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參數(shù)資料
| 型號： | TLC7225IDW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO24 |
| 封裝： | 0.300 INCH, GREEN, SOIC-24 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大?。?/td> | 331K |
| 代理商： | TLC7225IDW |
TLC7225C, TLC7225I
QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
SLAS109B – OCTOBER 1996 – REVISED FEBRUARY 2001
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
AGND bias for positive output offset
The TLC7225 AGND terminal can be biased above or below the system ground terminal, DGND, to provide an
offset-zero analog-output voltage level. Figure 10 shows a circuit configuration to achieve this for channel A of
the TLC7225. The output voltage, VO at OUTA, can be expressed as:
V
O +
V
bias )
D
A
V
I
where DA is a fractional representation of the digital input word (0 ≤ D ≤ 255/256).
_
+
DAC A
AGND
DGND
TLC7225
Vref
VO(OUTA)
5
22
2
7
3
VDD
6
VSS
VI
Vbias
Digital inputs omitted for clarity.
Figure 10. AGND Bias Circuit
Increasing AGND above system ground reduces the output range. VDD – Vref must be at least 4 V to ensure
specified operation. Since the AGND terminal is common to all four DACs, this method biases up the output
voltages of all the DACs in the TLC7225. Supply voltages VDD and VSS for the TLC7225 should be referenced
to DGND.
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| TLC7225IDWG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 5 us Quad 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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