4
LTC1412
TI I G CHARACTERISTICS
W
U
(Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SAMPLE(MAX)
Maximum Sampling Frequency ● 3 MHz
t
THROUGHPUT
Throughput Time (Acquisition + Conversion) ● 333 ns
t
CONV
Conversion Time ● 240 283 ns
t
ACQ
Acquisition Time ● 20 50 ns
t
1
CS↓ to CONVST↓ Setup Time (Notes 9, 10) ● 5ns
t
2
CONVST Low Time (Note 10) ● 20 ns
t
3
CONVST to BUSY Delay C
L
= 25pF 5 ns
● 20 ns
t
4
Data Ready Before BUSY↑ –20 0 20 ns
● –25 25 ns
t
5
Delay Between Conversions (Note 10) ● 50 ns
t
6
Data Access Time After CS↓ C
L
= 25pF 10 35 ns
● 45 ns
t
7
Bus Relinquish Time 830 ns
LTC1412C
● 35 ns
LTC1412I
● 40 ns
t
8
CONVST High Time ● 20 ns
t
9
Aperture Delay of Sample-and-Hold –1 ns
The ● denotes specifications which apply over the full operating
temperature range; all other limits and typicals T
A
= 25°C.
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 ground with DGND and
AGND wired together (unless otherwise noted).
Note 3: When these pin voltages are taken below V
SS
or above V
DD
, they
will be clamped by internal diodes. This product can handle input currents
greater than 100mA below V
SS
or above V
DD
without latchup.
Note 4: When these pin voltages are taken below V
SS
they will be clamped
by internal diodes. This product can handle input currents greater than
100mA below V
SS
without latchup. These pins are not clamped to V
DD
.
Note 5: V
DD
= 5V, f
SAMPLE
= 3MHz and t
r
= t
f
= 5ns unless otherwise
specified.
Note 6: Linearity, offset and full-scale specifications apply for a single-
ended A
IN
input with A
IN
–
grounded.
Note 7: Integral nonlinearity is defined as the 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 8: Bipolar offset is the offset voltage measured from –0.5LSB
when the output code flickers between 0000 0000 0000 and
1111 1111 1111.
Note 9: Guaranteed by design, not subject to test.
Note 10: Recommended operating conditions.
TI I G DIAGRA
UWW
DATA (N – 1)
DB11 TO DB0
CONVST
BUSY
CS
1412 TD
t
2
t
CONV
t
3
t
1
t
5
t
4
t
6
t
7
DATA N
DB11 TO DB0
DATA (N + 1)
DB11 TO DB0
DATA
