Datasheet

4
LTC1278
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Positive Supply Voltage (Notes 10, 11) Unipolar 4.95 5.25 V
Bipolar 4.75 5.25 V
V
SS
Negative Supply Voltage (Note 10) Bipolar Only –2.45 –5.25 V
I
DD
Positive Supply Current f
SAMPLE
= 500ksps ● 15.0 29.5 mA
SHDN = 0V ● 1.7 3.0 mA
I
SS
Negative Supply Current f
SAMPLE
= 500ksps, V
SS
= –5V ● 0.12 0.30 mA
P
D
Power Dissipation f
SAMPLE
= 500ksps ● 75.0 150 mW
SHDN = 0V ● 8.5 15 mW
(Note 5)
POWER REQUIRE E TS
W
U
LTC1278-4/LTC1278-5
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SAMPLE(MAX)
Maximum Sampling Frequency LTC1278-4 ● 400 kHz
LTC1278-5 ● 500
t
SAMPLE(MIN)
Minimum Throughput Time LTC1278-4 ● 2.5 µs
(Acquisition Time Plus Conversion Time) LTC1278-5 ● 2.0 µs
t
CONV
Conversion Time LTC1278-4 2.0 2.3 µs
LTC1278-5 1.6 1.85 µs
t
ACQ
Acquisition Time 200 ns
t
1
CS↓ to RD↓ Setup Time (Notes 9, 10) ● 0ns
t
2
CS↓ to CONVST↓ Setup Time (Notes 9, 10) ● 20 ns
t
3
SHDN↑ to CONVST↓ Wake-Up Time (Note 10) 350 ns
t
4
CONVST Low Time (Notes 10, 12) ● 40 ns
t
5
CONVST↓ to BUSY↓ Delay C
L
= 100pF 40 110 ns
Commercial
● 130 ns
Industrial ● 140 ns
t
6
Data Ready Before BUSY↑ C
L
= 100pF ● 20 40 ns
t
7
Wait Time RD↓ After BUSY↑ Mode 2, (see Figure 14) (Note 9) ● –20 ns
t
8
Data Access Time After RD↓ C
L
= 20pF (Note 9) 50 90 ns
Commercial
● 110 ns
Industrial ● 120 ns
C
L
= 100pF 70 125 ns
Commercial
● 150 ns
Industrial ● 170 ns
t
9
Bus Relinquish Time 20 30 75 ns
Commercial
● 20 85 ns
Industrial ● 20 90 ns
t
10
RD Low Time (Note 9) ● t
8
ns
t
11
CONVST High Time (Notes 9, 12) ● 40 ns
t
12
Aperture Delay of Sample-and-Hold Jitter <50ps 15 ns
LTC1278-4/LTC1278-5
(Note 5)
TI I G CHARACTERISTICS
W
U