參數(shù)資料
型號(hào)： X96010
廠商： Intersil Corporation
英文描述： Sensor Conditioner with Dual Look Up Table Memory and DACs(傳感器調(diào)節(jié)器，帶雙查找表存儲(chǔ)器及DACs)
中文描述： 傳感器護(hù)發(fā)高達(dá)表內(nèi)存和DAC（傳感器調(diào)節(jié)器，帶雙查找表存儲(chǔ)器及DAC的雙查找）
文件頁(yè)數(shù)： 17/26頁(yè)
文件大小： 372K
代理商： X96010
17
FN8214.1
October 25, 2005
By examining the block diagram in Figure 7, 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 by:
Ix = (V(VRef) / (384 Rx)) N
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 ±3.2 mA, which is obtained using a
resistance of 255
for Rx. This resistance is con-
nected externally to pin Rx of the X96010.
Bits I1DS and I2DS in Control Register 0 select the
direction of the currents through pins I1 and I2 inde-
pendently (See “I1DS: Current Generator 1 Direction
Select Bit (Non-volatile)” on page 10 and “Control and
Status Register Format” on page 11).
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 intial current level (I
x
) to some final level
(I
x
+
I
x
). The transition is monotonic and glitchless.
D/A Converter Control
The data byte inputs of the D/A converters can be con-
trolled 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.
The options are summarized in the following tables:
D1
D0
Select
ADC
AD[7:0]
Status
Register
LUT1 Row
Selection bits
LUT2 Row
Selection bits
Out
D1
D0
Select
Voltage
Reference
Voltage Input
Out
L2DA[5:0]:
Control
Register 2
L1DA[5:0]:
Control
Register 1
L2DAS: bit 6 in
Control register 5
L1DAS: bit 4 in
Control register 5
6
6
Figure 9. Look-Up Table Addressing
8
X96010
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X96010V14I Sensor Conditioner with Dual Look Up Table Memory and DACs
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