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LTC2447 PDF预览

LTC2447

更新时间: 2023-12-20 18:44:01
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
30页 604K
描述
具可选多个基准输入的 24 位、高速、8 通道 ΔΣ ADC

LTC2447 数据手册

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LTC2446/LTC2447  
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating  
temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4)  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
l
l
Resolution (No Missing Codes)  
Integral Nonlinearity  
0.1V ≤ V ≤ V , –0.5 • V ≤ V ≤ 0.5 • V , (Note 5)  
24  
Bits  
REF  
CC  
REF  
IN  
REF  
+
V
= 5V, REF = 5V, REF = GND, V  
= 2.5V, (Note 6)  
5
3
15  
5
ppm of V  
CC  
INCM  
REF  
REF  
+
REF = 2.5V, REF = GND, V  
= 1.25V, (Note 6)  
ppm of V  
INCM  
+
+
l
Offset Error  
2.5V ≤ REF ≤ V , REF = GND, GND ≤ IN = IN ≤ V (Note 12)  
2.5  
20  
µV  
CC  
CC  
+
+
Offset Error Drift  
Positive Full-Scale Error  
2.5V ≤ REF ≤ V , REF = GND, GND ≤ IN = IN ≤ V  
nV/°C  
CC  
CC  
+
+
+
l
l
REF = 5V, REF = GND, IN = 3.75V, IN = 1.25V  
10  
10  
50  
50  
ppm of V  
ppm of V  
REF  
REF  
+
REF = 2.5V, REF = GND, IN = 1.875V, IN = 0.625V  
+
+
+
Positive Full-Scale Error Drift  
Negative Full-Scale Error  
Negative Full-Scale Error Drift  
Total Unadjusted Error  
2.5V ≤ REF ≤ V , REF = GND, IN = 0.75REF ,  
0.2  
ppm of V /°C  
REF  
CC  
+
IN = 0.25 • REF  
+
+
l
l
REF = 5V, REF = GND, IN = 1.25V, IN = 3.75V  
REF = 2.5V, REF = GND, IN = 0.625V, IN = 1.875V  
10  
10  
50  
50  
ppm of V  
ppm of V  
REF  
REF  
+
+
+
+
+
2.5V ≤ REF ≤ V , REF = GND, IN = 0.25 • REF ,  
0.2  
ppm of V /°C  
REF  
CC  
+
IN = 0.75 • REF  
+
+
5V ≤ V ≤ 5.5V, REF = 2.5V, REF = GND, V  
= 1.25V  
15  
15  
15  
ppm of V  
ppm of V  
ppm of V  
CC  
CC  
INCM  
INCM  
REF  
REF  
REF  
5V ≤ V ≤ 5.5V, REF = 5V, REF = GND, V  
= 2.5V  
+
REF = 2.5V, REF = GND, V  
= 1.25V, (Note 6)  
INCM  
+
+
Input Common Mode Rejection DC 2.5V ≤ REF ≤ V , REF = GND, GND ≤ IN = IN ≤ V  
120  
dB  
CC  
CC  
ANALOG INPUT AND REFERENCE The l denotes the specifications which apply over the full operating  
temperature range, otherwise specifications are at TA = 25°C. (Note 3)  
SYMBOL  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
+
+
l
l
l
IN  
Absolute/Common Mode IN Voltage  
GND – 0.3V  
GND – 0.3V  
V
V
+ 0.3V  
V
V
V
CC  
CC  
IN  
Absolute/Common Mode IN Voltage  
+ 0.3V  
/2  
V
Input Differential Voltage Range  
–V /2  
REF  
V
IN  
REF  
+
(IN – IN )  
+
+
l
l
l
REF  
REF  
Absolute/Common Mode REF Voltage  
0.1  
GND  
0.1  
V
V
V
V
CC  
Absolute/Common Mode REF Voltage  
V
– 0.1V  
CC  
V
Reference Differential Voltage Range  
V
CC  
REF  
+
(REF – REF )  
+
C
C
C
C
IN Sampling Capacitance  
2
2
2
2
1
pF  
pF  
pF  
pF  
nA  
S(IN+)  
IN Sampling Capacitance  
S(IN–)  
+
REF Sampling Capacitance  
S(REF+)  
REF Sampling Capacitance  
S(REF–)  
+
l
I
I
t
Leakage Current, Inputs and Reference CS = V , IN = GND, IN = GND,  
–15  
15  
DC_LEAK(IN+, IN–, REF+, REF–)  
CC  
+
REF = 5V, REF = GND  
Average Input/Reference Current  
During Sampling  
Varies, See Applications Section  
nA  
SAMPLE(IN+, IN–, REF+, REF–)  
MUX Break-Before-Make  
MUX Off Isolation  
50  
ns  
OPEN  
QIRR  
V
IN  
= 2V DC to 1.8MHz  
120  
dB  
P-P  
24467fb  
3
For more information www.linear.com/LTC2446  

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