4
LTC1409
POWER REQUIRE E TS
W
U
(Note 5)
TI I G CHARACTERISTICS
W
U
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SAMPLE(MAX)
Maximum Sampling Frequency ● 800 kHz
t
CONV
Conversion Time ● 900 1250 ns
t
ACQ
Acquisition Time ● 150 ns
t
1
CS to RD Setup Time (Notes 9, 10) ● 0ns
t
2
CS↓ to CONVST↓ Setup Time (Notes 9, 10) ● 10 ns
t
3
NAP/SLP↓ to SHDN↓ Setup Time (Notes 9, 10) ● 10 ns
t
4
SHDN↑ to CONVST↓ Wake-Up Time (Note 10) 200 ns
t
5
CONVST Low Time (Notes 10, 11) ● 50 ns
t
6
CONVST to BUSY Delay C
L
= 25pF 10 ns
● 60 ns
t
7
Data Ready Before BUSY↑ 20 35 ns
● 15 ns
t
8
Delay Between Conversions (Note 10) ● 40 ns
t
9
Wait Time RD↓ After BUSY↑ ● –5 ns
t
10
Data Access Time After RD↓ C
L
= 25pF 15 35 ns
● 45 ns
C
L
= 100pF 20 45 ns
● 60 ns
t
11
Bus Relinquish Time 830 ns
0°C ≤ T
A
≤ 70°C ● 35 ns
–40°C ≤ T
A
≤ 85°C ● 40 ns
t
12
RD Low Time ● t
10
ns
t
13
CONVST High Time ● 50 ns
t
14
Aperture Delay of Sample-and-Hold –1.5 ns
Note 5: V
DD
= 5V, f
SAMPLE
= 800kHz, 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.
The
● indicates 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 latch-up.
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)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
SS
Negative Supply Current CS High ● 10 15 mA
Nap Mode CONVST = CS = RD = SHDN = 0V, NAP/SLP = 5V 10 µA
Sleep Mode CONVST = CS = RD = SHDN = 0V, NAP/SLP = 0V 1 µA
P
DISS
Power Dissipation ● 80 120 mW
Nap Mode CONVST = CS = RD = SHDN = 0V, NAP/SLP = 5V 3.8 6 mW
Sleep Mode CONVST = CS = RD = SHDN = 0V, NAP/SLP = 0V 0.01 mW
