Datasheet

6
LTC1197/LTC1197L
LTC1199/LTC1199L
AC CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 5V, V
REF
= 5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
LTC1197 LTC1199
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
t
CONV
Conversion Time (See Figures 1, 2) ● 1.4 1.4 µs
f
SMPL(MAX)
Maximum Sampling Frequency ● 500 450 kHz
t
dDO
Delay Time, CLK↑ to D
OUT
Data Valid C
LOAD
= 20pF 68 78 68 78 ns
● 100 100 ns
t
dis
Delay Time, CS↑ to D
OUT
Hi-Z ● 75 150 75 150 ns
t
en
Delay Time, CLK↓ to D
OUT
Enabled C
LOAD
= 20pF ● 40 68 40 68 ns
t
hDO
Time Output Data Remains C
LOAD
= 20pF ● 15 55 15 55 ns
Valid After CLK↑
t
r
D
OUT
Rise Time C
LOAD
= 20pF ● 10 20 10 20 ns
t
f
D
OUT
Fall Time C
LOAD
= 20pF ● 10 20 10 20 ns
C
IN
Input Capacitance Analog Input On Channel 20 20 pF
Analog Input Off Channel 5 5 pF
Digital Input 5 5 pF
LTC1197L LTC1199L
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
t
CONV
Conversion Time (See Figures 1, 2) ● 2.9 2.9 µs
f
SMPL(MAX)
Maximum Sampling Frequency ● 250 210 kHz
t
dDO
Delay Time, CLK↑ to D
OUT
Data Valid C
LOAD
= 20pF 130 180 130 180 ns
● 250 250 ns
t
dis
Delay Time, CS↑ to D
OUT
Hi-Z ● 120 250 120 250 ns
t
en
Delay Time, CLK↓ to D
OUT
Enabled C
LOAD
= 20pF ● 100 200 100 200 ns
t
hDO
Time Output Data Remains C
LOAD
= 20pF ● 30 120 30 120 ns
Valid After CLK↑
t
r
D
OUT
Rise Time C
LOAD
= 20pF ● 15 40 15 40 ns
t
f
D
OUT
Fall Time C
LOAD
= 20pF ● 15 40 15 40 ns
C
IN
Input Capacitance Analog Input On Channel 20 20 pF
Analog Input Off Channel 5 5 pF
Digital Input 5 5 pF
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 2.7V, V
REF
= 2.5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
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 after the channel selection.