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參數(shù)資料
型號： DC979A
廠商： Linear Technology
文件頁數(shù)： 23/32頁
文件大?。?/td> 0K
描述： BOARD DELTA SIGMA ADC LTC2442
軟件下載： QuikEval System
設(shè)計資源： DC979A Design File
DC979A Schematic
標(biāo)準(zhǔn)包裝： 1
系列： QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 24
采樣率（每秒）： 8k
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
工作溫度： 0°C ~ 70°C
已用 IC / 零件： LTC2442
已供物品： 板
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LTC2442
3
2442fa
For more information www.linear.com/LTC2442
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SEL+
Absolute/Common Mode SEL+ Voltage
SEL+ is the Positive Selected
Input Channel, see Table 3
l
GND – 0.3
VCC + 0.3
V
SEL–
Absolute/Common Mode SEL– Voltage
SEL– is the Negative Selected
Input Channel, see Table 3
l
GND – 0.3
VCC + 0.3
V
VIN
Input Differential Voltage Range
(SEL+ – SEL–)
l
–VREF/2
VREF/2
V
REF+
Absolute/Common Mode REF+ Voltage
l
0.1
VCC
V
REF–
Absolute/Common Mode REF– Voltage
l
GND
VCC – 0.1
V
VREF
Reference Differential Voltage Range
(REF+ – REF–)
l
0.1
VCC
V
CS(ADCINA)
ADCINA Sampling Capacitance
2
pF
CS(ADCINB)
ADCINB Sampling Capacitance
2
pF
CS(REF+)
REF+ Sampling Capacitance
2
pF
CS(REF–)
REF– Sampling Capacitance
2
pF
IDC_LEAK(SEL+, SEL–,
REF+, REF–)
Leakage Current, Inputs and Reference
CS = VCC, SEL+ = GND, SEL– =
GND, REF+ = 5V, REF– = GND
l
–15
1
15
nA
tOPEN
MUX Break-Before-Make
50
ns
QIRR
MUX Off Isolation
VIN = 2VP-P DC to 1.8MHz
120
dB
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 15)
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4, 15)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
0.1V ≤ VREF ≤ VCC, –0.5 VREF ≤ VIN ≤ 0.5 VREF (Note 5)
l
24
Bits
Integral Nonlinearity
VCC = 5V, REF+ = 5V, REF– = GND, VINCM = 2.5V (Note 6, 14)
VCC = 5V, REF+ = 2.5V, REF– = GND, VINCM = 1.25V (Note 6, 14)
REF+ = 4.096V, REF– = GND, VINCM = 2.048V (Note 6, 14)
l
2
1
10
7
ppm of VREF
Offset Error
2.5V ≤ REF+ ≤ VCC, REF– = GND,
GND ≤ SEL+ = SEL– ≤ VCC (Note 12)
l
2.5
5
V
Offset Error Drift
2.5V ≤ REF+ ≤ VCC, REF– = GND,
GND ≤ SEL+ = SEL– ≤ VCC
20
nV/°C
Positive Full-Scale Error
REF+ = 5V, REF– = GND, SEL+ = 3.75V, SEL– = 1.25V
REF+ = 2.5V, REF– = GND, SEL+ = 1.875V, SEL– = 0.625V
l
10
50
ppm of VREF
Positive Full-Scale Error Drift
2.5V ≤ REF+ ≤ VCC, REF– = GND,
SEL+ = 0.75 REF+, SEL– = 0.25 REF+
0.2
ppm of VREF/°C
Negative Full-Scale Error
REF+ = 5V, REF– = GND, SEL+ = 1.25V, SEL– = 3.75V
REF+ = 2.5V, REF– = GND, SEL+ = 0.625V, SEL– = 1.875V
l
10
50
ppm of VREF
Negative Full-Scale Error Drift
2.5V ≤ REF+ ≤ VCC, REF– = GND,
SEL+ = 0.25 REF+, SEL– = 0.75 REF+
0.2
ppm of VREF/°C
Total Unadjusted Error
5V ≤ VCC ≤ 5.5V, REF+ = 2.5V, REF– = GND, VINCM = 1.25V (Note 6)
5V ≤ VCC ≤ 5.5V, REF+ = 5V, REF– = GND, VINCM = 2.5V (Note 6)
REF+ = 2.5V, REF– = GND, VINCM = 1.25V (Note 6)
12
ppm of VREF
Input Common Mode Rejection DC
2.5V ≤ REF+ ≤ VCC, REF– = GND,
GND ≤ SEL– = SEL+ ≤ VCC
120
dB
electrical characteristics
analog input and reFerence
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