LTC1292 Datasheet, PDF (3/24 Pages) Linear Technology – Single Chip 12-Bit Data Acquisition Systems

LTC1292/LTC1297
AC CHARACTERISTICS (Note 3)
SYMBOL
f_CLK
t_SMPL
PARAMETER
Clock Frequency
Analog Input Sample Time
t_CONV
Conversion Time
CONDITIONS
V_CC = 5V (Note 6)
See Operating Sequence
See Operating Sequence
LTC1292
LTC1297
LTC1292B/LTC1297B
LTC1292C/LTC1297C
LTC1292D/LTC1297D
MIN TYP MAX
(Note 9)
1.0
1.5CLK
0.5CLK+ 5.5µs
12
t_CYC
Total Cycle Time
See Operating Sequence (Note 6)
LTC1292
LTC1297
14CLK + 2.5µs
14CLK + 6µs
t_dDO
Delay Time, CLK↓ to D_OUT Data Valid
See Test Circuits
q
160
300
t_dis
Delay Time, CS↑ to D_OUT Hi-Z
See Test Circuits
t_en
Delay Time, CLK↓ to D_OUT Enabled
See Test Circuits
t_hDO
Time Output Data Remains Valid After CLK↓
q
80
150
q
80
200
130
t_f
D_OUT Fall Time
See Test Circuits
q
65
130
t_r
t_WHCLK
t_WLCLK
t_suCS
D_OUT Rise Time
CLK High Time
CLK Low Time
Setup Time, CS↓ Before CLK↑
(LTC1297 Wakeup Time)
See Test Circuits
V_CC = 5V (Note 6)
V_CC = 5V (Note 6)
V_CC = 5V (Note 6)
q
25
50
300
400
LTC1292
50
LTC1297
5.5
t_WHCS
CS High Time Between Data Transfer Cycles V_CC = 5V (Note 6)
LTC1292
2.5
LTC1297
0.5
t_WLCS
CS Low Time During Data Transfer
V_CC = 5V (Note 6)
LTC1292
LTC1297
14CLK
14CLK+ 5.5µs
C_IN
Input Capacitance
Analog Inputs On Channel
100
Analog Inputs Off Channel
5
Digital Inputs
5
U
DIGITAL A D DC ELECTRICAL CHARACTERISTICS^{(Note 3)}
SYMBOL
V_IH
V_IL
I_IH
I_IL
V_OH
PARAMETER
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
V_OL
Low Level Output Voltage
I_OZ
High Z Output Leakage
I_SOURCE
I_SINK
Output Source Current
Output Sink Current
CONDITIONS
V_CC = 5.25V
V_CC = 4.75V
V_IN = VCC
V_IN = 0V
V_CC = 4.75V, I_O = –10µA
I_O = 360µA
V_CC = 4.75V, I_O = 1.6mA
V_OUT = VCC, CS High
V_OUT = 0V, CS High
V_OUT = 0V
V_OUT = V_CC
LTC1292B/LTC1297B
LTC1292C/LTC1297C
LTC1292D/LTC1297D
MIN TYP MAX
q
2.0
q
0.8
q
2.5
q
–2.5
4.7
q
2.4
4.0
q
0.4
q
3
q
–3
–20
20
UNITS
MHz
CLK
Cycles
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
pF
pF
pF
UNITS
V
V
µA
µA
V
V
V
µA
µA
mA
mA
3