参数资料
型号: DC742A
厂商: Linear Technology
文件页数: 22/28页
文件大小: 0K
描述: BOARD DELTA SIGMA ADC LTC2449
软件下载: QuikEval System
设计资源: DC742A Design File
DC742A Schematic
标准包装: 1
系列: QuikEval™
ADC 的数量: 1
位数: 24
采样率(每秒): 8k
数据接口: MICROWIRE?,串行,SPI?
已用 IC / 零件: LTC2449
已供物品:
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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 INVoltage
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 REFVoltage
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–)
INSampling Capacitance
2
pF
CS(REF+)
REF+ Sampling Capacitance
2
pF
CS(REF–)
REFSampling 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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