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參數資料
| 型號： | TLC7226EDW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | QUAD, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, PDSO20 |
| 封裝： | PLASTIC, SOIC-20 |
| 文件頁數： | 3/20頁 |
| 文件大小： | 280K |
| 代理商： | TLC7226EDW |
TLC7226C, TLC7226E
QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
SLAS060C – JANUARY 1995 – REVISED OCTOBER 2000
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
bipolar output operation using external amplifier
Each of the DACs of the TLC7226 can also be individually configured to provide bipolar output operation, using
an external amplifier and two resistors per channel. Figure 9 shows a circuit used to implement offset binary
coding (bipolar operation) with DAC A of the TLC7226. In this case:
V
O +
1
) R2
R1
D
A
V
ref *
R2
R1
V
ref
with R1
+ R2
V
O +
2D
A *
1
V
ref
where D
A
is a fractional representation of the digital word in latch A.
(2)
Mismatch between R1 and R2 causes gain and offset errors. Therefore, these resistors must match and track
over temperature. The TLC7226 can be operated with a single power supply or from positive and negative
power supplies.
15 V
_
+
DAC A
TLC7226
2
4
R2
R1
VO
REF
R1 = R2 = 10 k
±0.1%
_
+
– 15 V
Figure 9. Bipolar Output Circuit
staircase window comparator
In many test systems, it is important to be able to determine whether some parameter lies within defined limits.
The staircase window comparator shown in Figure 10 is a circuit that can be used to measure the VOH and VOL
thresholds of a TTL device under test. Upper and lower limits on both VOH and VOL can be programmed using
the TLC7226. Each adjacent pair of comparators forms a window of programmable size (see Figure 11). When
the test voltage (Vtest) is within a window, then the output for that window is higher. With a reference of 2.56 V
applied to the REF input, the minimum window size is 10 mV.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TLC7226I | 制造商:TI 制造商全稱:Texas Instruments 功能描述:QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS |
| TLC7226IDW | 功能描述:數模轉換器- DAC Quad DAC 8bit RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩定時間: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 |
| TLC7226IDWG4 | 功能描述:數模轉換器- DAC Quad Parallel-In Sngl/Dual Sply RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩定時間: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 |
| TLC7226IDWR | 功能描述:數模轉換器- DAC Quad Parallel-In Sngl/Dual Sply RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩定時間: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 |
| TLC7226IDWRG4 | 功能描述:數模轉換器- DAC Quad Parallel-In Sngl/Dual Sply RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩定時間: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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