Datasheet

3
LTC1292/LTC1297
12927fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
CLK
Clock Frequency V
CC
= 5V (Note 6) (Note 9) 1.0 MHz
t
SMPL
Analog Input Sample Time See Operating Sequence LTC1292 1.5CLK
LTC1297 0.5CLK+5.5µs
t
CONV
Conversion Time See Operating Sequence 12 CLK
Cycles
t
CYC
Total Cycle Time See Operating Sequence LTC1292 14CLK+2.5µs
(Note 6) LTC1297 14CLK+6µs
t
dDO
Delay Time, CLK↓ to D
OUT
Data Valid See Test Circuits ● 160 300 ns
t
dis
Delay Time, CS↑ to D
OUT
Hi-Z See Test Circuits ● 80 150 ns
t
en
Delay Time, CLK↓ to D
OUT
Enabled See Test Circuits ● 80 200 ns
t
hDO
Time Output Data Remains Valid After CLK↓ 130 ns
t
f
D
OUT
Fall Time See Test Circuits ● 65 130 ns
t
r
D
OUT
Rise Time See Test Circuits ● 25 50 ns
t
WHCLK
CLK High Time V
CC
= 5V (Note 6) 300 ns
t
WLCLK
CLK Low Time V
CC
= 5V (Note 6) 400 ns
t
suCS
Setup Time, CS↓ Before CLK↑ V
CC
= 5V (Note 6) LTC1292 50 ns
(LTC1297 Wakeup Time) LTC1297 5.5 µs
t
WHCS
CS High Time Between Data Transfer Cycles V
CC
= 5V (Note 6) LTC1292 2.5 µs
LTC1297 0.5 µs
t
WLCS
CS Low Time During Data Transfer V
CC
= 5V (Note 6) LTC1292 14CLK
LTC1297 14CLK+5.5µs
C
IN
Input Capacitance Analog Inputs On Channel 100 pF
Analog Inputs Off Channel 5 pF
Digital Inputs 5 pF
AC CHARACTERISTICS
LTC1292B/LTC1297B
LTC1292C/LTC1297C
LTC1292D/LTC1297D
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
CC
= 5.25V ● 2.0 V
V
IL
Low Level Input Voltage V
CC
= 4.75V ● 0.8 V
I
IH
High Level Input Current V
IN
= V
CC
● 2.5 µA
I
IL
Low Level Input Current V
IN
= 0V ● –2.5 µA
V
OH
High Level Output Voltage V
CC
= 4.75V, I
O
= –10µA 4.7 V
I
O
= 360µA ● 2.4 4.0 V
V
OL
Low Level Output Voltage V
CC
= 4.75V, I
O
= 1.6mA ● 0.4 V
I
OZ
High Z Output Leakage V
OUT
= V
CC
, CS High ● 3 µA
V
OUT
= 0V, CS High ● –3 µA
I
SOURCE
Output Source Current V
OUT
= 0V –20 mA
I
SINK
Output Sink Current V
OUT
= V
CC
20 mA
LTC1292B/LTC1297B
LTC1292C/LTC1297C
LTC1292D/LTC1297D
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
U
The ● denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. (Note 3)