參數(shù)資料
型號： DC845A
廠商： Linear Technology
文件頁數(shù)： 22/28頁
文件大?。?/td> 0K
描述： BOARD DELTA SIGMA ADC LTC2448
軟件下載： QuikEval System
設計資源： DC845A Design File
DC845A Schematic
標準包裝： 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?
已用 IC / 零件： LTC2448
已供物品： 板
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LTC2444/LTC2445/
LTC2448/LTC2449
3
2444589fb
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
0.1V
≤ VREF ≤ VCC, –0.5 VREF ≤ VIN ≤ 0.5 VREF, (Note 5)
●
24
Bits
Integral Nonlinearity
VCC = 5V, REF+ = 5V, REF– = GND, VINCM = 2.5V, (Note 6)
●
5
15
ppm of VREF
REF+ = 2.5V, REF– = GND, VINCM = 1.25V, (Note 6)
3
ppm of VREF
Offset Error
2.5V
≤ REF+ ≤ VCC, REF– = GND,
●
2.5
5
V
GND
≤ IN+ = IN– ≤ VCC (Note 12)
Offset Error Drift
2.5V
≤ REF+ ≤ VCC, REF– = GND,
20
nV/
°C
GND
≤ IN+ = IN– ≤ VCC
Positive Full-Scale Error
REF+ = 5V, REF– = GND, IN+ = 3.75V, IN– = 1.25V
●
10
50
ppm of VREF
REF+ = 2.5V, REF– = GND, IN+ = 1.875V, IN– = 0.625V
●
10
50
ppm of VREF
Positive Full-Scale Error Drift
2.5V
≤ REF+ ≤ VCC, REF– = GND,
0.2
ppm of VREF/°C
IN+ = 0.75 REF+, IN– = 0.25 REF+
Negative Full-Scale Error
REF+ = 5V, REF– = GND, IN+ = 1.25V, IN– = 3.75V
●
10
50
ppm of VREF
REF+ = 2.5V, REF– = GND, IN+ = 0.625V, IN– = 1.875V
●
10
50
ppm of VREF
Negative Full-Scale Error Drift
2.5V
≤ REF+ ≤ VCC, REF– = GND,
0.2
ppm of VREF/°C
IN+ = 0.25 REF+, IN– = 0.75 REF+
Total Unadjusted Error
5V
≤ VCC ≤ 5.5V, REF+ = 2.5V, REF– = GND, VINCM = 1.25V
15
ppm of VREF
5V
≤ VCC ≤ 5.5V, REF+ = 5V, REF– = GND, VINCM = 2.5V
15
ppm of VREF
REF+ = 2.5V, REF– = GND, VINCM = 1.25V, (Note 6)
15
ppm of VREF
Input Common Mode Rejection DC
2.5V
≤ REF+ ≤ VCC, REF– = GND,
120
dB
GND
≤ IN– = IN+ ≤ VCC
The
● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IN+
Absolute/Common Mode IN+ Voltage
●
GND – 0.3V
VCC + 0.3V
V
IN–
Absolute/Common Mode IN– Voltage
●
GND – 0.3V
VCC + 0.3V
V
VIN
Input Differential Voltage Range
●
–VREF/2
VREF/2
V
(IN+ – IN–)
REF+
Absolute/Common Mode REF+ Voltage
●
0.1
VCC
V
REF–
Absolute/Common Mode REF– Voltage
●
GND
VCC – 0.1V
V
VREF
Reference Differential Voltage Range
●
0.1
VCC
V
(REF+ – REF–)
CS(IN+)
IN+ Sampling Capacitance
2
pF
CS(IN–)
IN– Sampling Capacitance
2
pF
CS(REF+)
REF+ Sampling Capacitance
2
pF
CS(REF–)
REF– Sampling Capacitance
2
pF
IDC_LEAK(IN+, IN–,
Leakage Current, Inputs and Reference
CS = VCC, IN
+ = GND, IN– = GND,
●
–15
1
15
nA
REF+, REF–)
REF+ = 5V, REF– = GND
ISAMPLE(IN+, IN–,
Average Input/Reference Current
Varies, See Applications Section
nA
REF+, REF–)
During Sampling
tOPEN
MUX Break-Before-Make
50
ns
QIRR
MUX Off Isolation
VIN = 2VP-P DC to 1.8MHz
120
dB
The
● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
A ALOG I PUT A
U
D REFERE CE
UU
U
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