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 fo" />
參數(shù)資料
型號: X96010V14IZ
廠商: Intersil
文件頁數(shù): 9/26頁
文件大?。?/td> 0K
描述: IC SENSOR CONDITIONER 14-TSSOP
標(biāo)準(zhǔn)包裝: 95
類型: 傳感器調(diào)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(yīng)商設(shè)備封裝: 14-TSSOP
包裝: 管件
產(chǎn)品目錄頁面: 1246 (CN2011-ZH PDF)
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-
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 (Ix) to some final level
(Ix + Ix). 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]
LUT1 Row
LUT2 Row
Out
D1
D0
Select
Voltage
Voltage Input
Selection bits
Reference
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
Status
Register
Figure 9. Look-Up Table Addressing
8
X96010
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