4
LTC1860L/LTC1861L
18601Lf
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
CONV
Conversion Time (See Figure 1) ● 3.7 4.66 µs
f
SMPL(MAX)
Maximum Sampling Frequency ● 150 kHz
t
dDO
Delay Time, SCK↓ to SDO Data Valid C
LOAD
= 20pF 45 55 ns
● 60 ns
t
dis
Delay Time, CONV↑ to SDO Hi-Z ● 55 120 ns
t
en
Delay Time, CONV↓ to SDO Enabled C
LOAD
= 20pF ● 35 120 ns
t
hDO
Time Output Data Remains C
LOAD
= 20pF ● 515 ns
Valid After SCK↓
t
r
SDO Rise Time C
LOAD
= 20pF 25 ns
t
f
SDO Fall Time C
LOAD
= 20pF 12 ns
The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are T
A
= 25°C. V
CC
= 2.7V, V
REF
= 2.5V, f
SCK
= f
SCK(MAX)
as defined in Recommended Operating
Conditions, unless otherwise noted.
TI I G CHARACTERISTICS
UW
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Supply Current vs Sampling
Frequency
Supply Current vs Temperature
Sleep Current vs Temperature
SAMPLING FREQUENCY (kHz)
0.1
SUPPLY CURRENT (µA)
1
10
100
1000
0.01 1 10 1000
1860L/61L G01
0.1 100
TEMPERATURE (°C)
–50
SUPPLY CURRENT (µA)
600
500
400
300
200
100
0
25 75
1860L/61L G02
–25 0
50 100 125
TEMPERATURE (°C)
–50
SHUTDOWN CURRENT (µA)
20
15
10
5
0
25 75
1860L/61L G03
–25 0
50 100 125
f
S
= 150kHz
V
CC
= 2.7V
V
REF
= 2.5V
CONV LOW = 1.5µs
T
A
= 25°C
V
CC
= 2.7V
f
S
= 150kHz
V
CC
= 2.7V
V
REF
= 2.5V
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 f
SCK
= f
SCK(MAX)
. In the case of the LTC1860L SCK does
not have to be clocked during this time if the SDO data word is not
desired. In the case of the LTC1861L a minimum of 2 clocks are required
on the SCK input after CONV falls to configure the MUX during this time.
