參數(shù)資料
型號(hào)： ISPPAC30-01S
廠商： Lattice Semiconductor Corporation
英文描述： In-System Programmable Analog Circuit
中文描述： 在系統(tǒng)可編程模擬電路
文件頁(yè)數(shù)： 15/30頁(yè)
文件大小： 379K
代理商： ISPPAC30-01S
Lattice Semiconductor
ispPAC30 Preliminary Data Sheet
15
More details about MDAC performance are found in the speci
fi
cations section of the data sheet. It should be noted
that the speci
fi
cations of the MDAC’s in regard to bandwidth, gain and offset errors, and drift over temperature are
equivalent to or better than those of the IA’s themselves. This means that in addition to having the same high-
impedance characteristics of the IA’s, the MDAC’s will perform in an equivalent fashion when used in combination
with the IA’s as signal conditioning elements. Predictable performance thereby results when mixing various combi-
nations of input resources together.
Table 2. Outputs vs. Digital Input Code
Increasing MDAC Effective Resolution
Because the value of the ispPAC30’s voltage references can be set to several output voltages, ranging from 64mV
to 2.5V, it is possible to use high-value MDAC settings (>50% full scale) to synthesize most desired thresholds. This
means that a given threshold (32mV or greater) can be set with a resolution of +/-0.8%.
If a higher degree of resolution is needed, the two voltage references and MDACs can be combined in a coarse-
fi
ne adjustment scheme, as shown in Figure 1. In this circuit, VREF1 and MDAC1 provide an adjustment range of
0-2.5V with 19.5mV of resolution, while VREF2 and MDAC2 provide an adjustment range of +/-64mV with 0.5mV of
resolution. By adding these two sources together, a total adjustment range of 0-2.56V with an effective resolution of
0.5mV is achieved.
Figure 1. Coarse-Fine Adjustment using Two References
Code
MDAC Equivalent Voltage Output vs. VREF Input (in Volts)
0.0640
0.128
0.256
-0.0640
-0.128
-0.256
-0.0635
-0.127
-0.254
-0.0480
-0.096
-0.192
-0.0320
-0.064
-0.128
-0.0160
-0.032
-0.064
-0.0005
-0.001
-0.002
0.0000
0.000
0.000
0.0005
0.001
0.002
0.0160
0.032
0.064
0.0320
0.064
0.128
0.0480
0.096
0.192
0.0630
0.126
0.252
0.0635
0.127
0.254
0.00025
0.0005
0.001
0.00050
0.0010
0.002
DEC
0
1
32
64
96
127
128
129
160
192
224
254
255
—
—
HEX
00
01
20
40
60
7F
80
81
A0
C0
E0
FE
FF
—
—
0.512
-0.512
-0.508
-0.384
-0.256
-0.128
-0.004
0.000
0.004
0.128
0.256
0.384
0.504
0.508
0.002
0.004
1.024
-1.024
-1.016
-0.768
-0.512
-0.256
-0.008
0.000
0.008
0.256
0.512
0.768
1.008
1.016
0.004
0.008
2.048
-2.048
-2.032
-1.536
-1.024
-0.512
-0.016
0.000
0.016
0.512
1.024
1.536
2.016
2.032
0.008
0.016
2.5000
-2.5000
-2.4805
-1.8750
-1.2500
-0.6250
-0.0195
0.0000
0.0195
0.6250
1.2500
1.8750
2.4609
2.4805
0.0098
0.0195
Vref Input (V)
Full Scale
Full Scale + 1 lsb
-100.0%
-99.2%
-75.0%
-50.0%
-25.0%
-0.8%
0.0%
0.8%
25.0%
50.0%
75.0%
98.4%
99.2%
0.78%
1.56%
Bipolar Zero - 1 lsb
Bipolar Zero
Bipolar Zero + 1 lsb
+Full Scale - 1 lsb
+Full Scale
1 lsb (with sign)
2 lsb (1 lsb, no sign)
CP1
IA2
G=-1
IN
V
MON
Links Open
Comparator Mode
OUT1
ispPAC30
MDAC1
MDAC2
VREF1=2.5V
VREF2=256mV
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISPPAC30-01SI 功能描述:SPLD - 簡(jiǎn)單可編程邏輯器件 Not Upgrade Device CIRCUIT RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時(shí)間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24
ISPPAC80-01PI 功能描述:SPLD - 簡(jiǎn)單可編程邏輯器件 PROGRAMMABLE ANALOG CIRCUIT RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時(shí)間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24
ISPPAC80-01SI 功能描述:SPLD - 簡(jiǎn)單可編程邏輯器件 PROGRAMMABLE ANALOG CIRCUIT RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時(shí)間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24
ISPPAC81 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:In-System Programmable Analog Circuit
ISPPAC81-01PI 功能描述:SPLD - 簡(jiǎn)單可編程邏輯器件 PROGRAMMABLE ANALOG CIRCUIT RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池?cái)?shù)量:10 最大工作頻率:66 MHz 延遲時(shí)間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24
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