參數(shù)資料
型號: LTC1865CS8
元件分類: ADC
英文描述: Analog to Digital Converter
中文描述: 模數(shù)轉(zhuǎn)換器
文件頁數(shù): 15/20頁
文件大小: 278K
代理商: LTC1865CS8
4
LTC1864/LTC1865
18645f
LTC1864/LTC1865
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC
Supply Voltage
4.75
5.25
V
fSCK
Clock Frequency
q
DC
20
MHz
tCYC
Total Cycle Time
16 SCK + tCONV
s
tSMPL
Analog Input Sampling Time
LTC1864
16
SCK
LTC1865
14
SCK
tsuCONV
Setup Time CONV
↓ Before First SCK↑
30
ns
(See Figure 1)
thDI
Hold Time SDI After SCK
LTC1865
15
ns
tsuDI
Setup Time SDI Stable Before SCK
LTC1865
15
ns
tWHCLK
SCK High Time
fSCK = fSCK(MAX)
40%
1/fSCK
tWLCLK
SCK Low Time
fSCK = fSCK(MAX)
40%
1/fSCK
tWHCONV
CONV High Time Between Data
tCONV
s
Transfer Cycles
tWLCONV
CONV Low Time During Data Transfer
16
SCK
thCONV
Hold Time CONV Low After Last SCK
13
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: Integral nonlinearity is defined as deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 4: Channel leakage current is measured while the part is in sample
mode.
The q denotes specifications which apply over the
full operating temperature range, otherwise specifications are TA = 25°C.
LTC1864/LTC1865
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tCONV
Conversion Time (See Figure 1)
q
2.75
3.2
s
fSMPL(MAX) Maximum Sampling Frequency
q
250
kHz
tdDO
Delay Time, SCK
↓ to SDO Data Valid
CLOAD = 20pF
15
20
ns
q
25
ns
tdis
Delay Time, CONV
↑ to SDO Hi-Z
q
30
60
ns
ten
Delay Time, CONV
↓to SDO Enabled
CLOAD = 20pF
q
30
60
ns
thDO
Time Output Data Remains
CLOAD = 20pF
q
510
ns
Valid After SCK
tr
SDO Rise Time
CLOAD = 20pF
8
ns
tf
SDO Fall Time
CLOAD = 20pF
4
ns
The q denotes specifications which apply over the full operating temperature
range, otherwise specifications are TA = 25°C. VCC = 5V, VREF = 5V, fSCK = fSCK(MAX) as defined in Recommended Operating
Conditions, unless otherwise noted.
RECO
E DED OPERATI G CO DITIO S
U
UW
W
TI I G CHARACTERISTICS
U
W
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