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參數(shù)資料
| 型號： | X96012V14IZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SENSOR CONDITION UNIV 14TSSOP |
| 標準包裝： | 95 |
| 類型： | 傳感器調節(jié)器 |
| 輸入類型： | 電壓 |
| 輸出類型： | 電壓 |
| 接口： | 2 線 |
| 電流 - 電源： | 15mA |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 包裝： | 管件 |
15
FN8216.3
February 20, 2008
By examining the block diagram in Figure 8, we see that the
maximum current through pin I1 is set by fixing values for
V(VREF) and R1. The output current can then be varied by
changing the data byte at the D/A converter input.
In general, the magnitude of the current at the D/A converter
output pins (I1, I2) may be calculated using Equation 1:
where x = 1, 2 and N is the decimal representation of the
input byte to the corresponding D/A converter.
The value for the resistor Rx (x = 1, 2) determines the full
scale output current that the D/A converter may sink or
source. The full scale output current has a maximum value of
±3.2mA, which is obtained using a resistance of 255
Ω for Rx.
This resistance may be connected externally to pin Rx of the
X96012, or may be selected from one of three internal values.
Bits I1FSO1 and I1FSO0 select the full scale output current
setting for I1 as described in “I1FSO1 - I1FSO0: Current
page 12. Bits I2FSO1 and I2FSO0 select the maximum
current setting for I2. When an internal resistor is selected for
R1 or R2, then no resistor should be connected externally at
the corresponding pin.
Bits I1DS and I2DS in Control Register 0 select the direction
of the currents through pins I1 and I2 independently (see
D/A Converter Output Current Response
When the D/A converter input data byte changes by an
arbitrary number of bits, the output current changes from an
initial current level (Ix) to some final level (Ix + ΔIx). The
transition is monotonic and glitchless.
D/A Converter Control
The data byte inputs of the D/A converters can be controlled
in three ways:
1) With the A/D converter and through the look-up tables
(default),
2) Bypassing the A/D converter and directly accessing the
look-up tables,
3) Bypassing both the A/D converter and look-up tables, and
directly setting the D/A converter input byte.
DAC 2
8
D0H
10FH
8
LUT2
6
LUT2 ROW
OUT
D1
D0
SELECT
D2DAS: BIT 7 OF
D2DA[7:0] : CONTROL REGISTER 4
SELECTION BITS
A
D
E
R
8
INPUT BYTE
CONTROL REGISTER 5
DAC 1
8
90H
CFH
8
LUT1
6
LUT1 ROW
OUT
D1
D0
SELECT
D1DAS: BIT 5 OF
D1DA[7:0] : CONTROL REGISTER 3
SELECTION BITS
A
D
E
R
8
INPUT BYTE
CONTROL REGISTER 5
…
FIGURE 9. LOOK-UP TABLE (LUT) OPERATION
Ix
V
(
Vref
()
384
(
Rx
)) N
=
(EQ. 1)
TABLE 5. D/A CONVERTER 1 ACCESS SUMMARY
L1DAS
D1DAS
CONTROL SOURCE
0
A/D converter through LUT1 (Default)
1
0
Bits L1DA5 - L1DA0 through LUT1
X
1
Bits D1DA7 - D1DA0
NOTE: “X” = Don’t Care Condition (May be either “1” or “0”)
TABLE 6. D/A CONVERTER 2 ACCESS SUMMARY
L2DAS
D2DAS
CONTROL SOURCE
0
A/D converter through LUT2 (Default)
1
0
Bits L2DA5 - L2DA0 through LUT2
X
1
Bits D2DA7 - D2DA0
NOTE: “X” = Don’t Care Condition (May be either “1” or “0”)
X96012
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