LTC1865L Просмотр технического описания (PDF) - Linear Technology
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LTC1865L Datasheet PDF : 16 Pages
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LTC1864L/LTC1865L
RECO E DED OPERATI G CO DITIO S The ● denotes specifications which apply over the
full operating temperature range, otherwise specifications are TA = 25°C.
SYMBOL PARAMETER
CONDITIONS
LTC1864L/LTC1865L
MIN TYP MAX UNITS
VCC
fSCK
tCYC
tSMPL
Supply Voltage
Clock Frequency
Total Cycle Time
Analog Input Sampling Time (Note 5)
LTC1864L
LTC1865L
2.7
3.6
V
● DC
8
MHz
16 • SCK + tCONV
µs
16
SCK
14
SCK
tsuCONV Setup Time CONV↓ Before First SCK↑
(See Figure 1)
60
ns
thDI
tsuDI
tWHCLK
tWLCLK
tWHCONV
Hold Time SDI After SCK↑
Setup Time SDI Stable Before SCK↑
SCK High Time
SCK Low Time
CONV High Time Between Data
Transfer Cycles
LTC1865L
LTC1865L
fSCK = fSCK(MAX)
fSCK = fSCK(MAX)
30
30
45%
45%
tCONV
ns
ns
1/fSCK
1/fSCK
µs
tWLCONV CONV Low Time During Data Transfer
thCONV Hold Time CONV Low After Last SCK↑
16
SCK
26
ns
WU
TI I G CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are TA = 25°C. VCC = 2.7V, VREF = 2.5V, fSCK = fSCK(MAX) as defined in Recommended Operating
Conditions, unless otherwise noted.
SYMBOL PARAMETER
tCONV
fSMPL(MAX)
tdDO
Conversion Time (See Figure 1)
Maximum Sampling Frequency
Delay Time, SCK↓ to SDO Data Valid
tdis
Delay Time, CONV↑ to SDO Hi-Z
ten
Delay Time, CONV↓ to SDO Enabled
thDO
Time Output Data Remains
Valid After SCK↓
tr
SDO Rise Time
tf
SDO Fall Time
CONDITIONS
CLOAD = 20pF
CLOAD = 20pF
CLOAD = 20pF
CLOAD = 20pF
CLOAD = 20pF
LTC1864L/LTC1865L
MIN TYP MAX UNITS
●
3.7
4.66
µs
● 150
kHz
45
55
ns
●
60
ns
●
55
120
ns
●
35
120
ns
●
5
15
ns
25
ns
12
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.
Note 5: Assumes fSCK = fSCK(MAX) In the case of the LTC1864L SCK does
not have to be clocked during this time if the SDO data word is not
desired. In the case of the LTC1865L a minimum of 2 clocks are required
on the SCK input after CONV falls to configure the MUX during this time.
4
sn18645L 18645Lfs
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