Datasheet

2
LTC1090
1090fc
ABSOLUTE AXI U RATI GS
WWWU
Supply Voltage (V
CC
) to GND or V
–
................................
12V
Negative Supply Voltage (V
–
) ..................... –6V to GND
Voltage:
Analog and Reference
Inputs .................................... (V
–
) –0.3V to V
CC
0.3V
Digital Inputs ......................................... –0.3V to 12V
Digital Outputs .............................. – 0.3V to V
CC
0.3V
Power Dissipation.............................................. 500mW
Operating Temperature Range
LTC1090AC/LTC1090C ........................–40°C to 85°C
LTC1090AM/LTC1090M (OBSOLETE) ......–55°C to 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
(Notes 1 and 2)
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature
ranges.
RECO E DED OPERATI G CO DITIO S
UUUUWW
LTC1090/LTC1090A
SYMBOL PARAMETER CONDITIONS MIN MAX UNITS
V
CC
Positive Supply Voltage V
–
= 0V 4.5 10 V
V
–
Negative Supply Voltage V
CC
= 5V –5.5 0 V
f
SCLK
Shift Clock Frequency V
CC
= 5V 0 1.0 MHz
f
ACLK
A/D Clock Frequency V
CC
= 5V 25°C 0.01 2.0 MHz
85°C 0.05 2.0
125°C 0.25 2.0
t
CYC
Total Cycle Time See Operating Sequence 10 SCLK + Cycles
48 ACLK
t
hCS
Hold Time, CS Low After Last SCLK
↓
V
CC
= 5V 0 ns
t
hDI
Hold Time, D
IN
After SCLK
↑
V
CC
= 5V 150 ns
t
suCS
Setup Time CS
↓
Before Clocking in First Address Bit (Note 9) V
CC
= 5V 2 ACLK Cycles
1µs
t
suDI
Setup Time, D
IN
Stable Before SCLK
↑
V
CC
= 5V 400 ns
t
WHACLK
ACLK High Time V
CC
= 5V 127 ns
t
WLACLK
ACLK Low Time V
CC
= 5V 200 ns
t
WHCS
CS High Time During Conversion V
CC
= 5V 44 ACLK
Cycles
OBSOLETE PACKAGE
Consider the SW or N Package for Alternate Source
1
2
3
4
5
6
7
8
9
10
TOP VIEW
J PACKAGE
20-LEAD CERDIP
T
JMAX
= 150°C θ
JA
= 70° C/W
SW PACKAGE
20-LEAD PLASTIC SO WIDE
N PACKAGE
20-LEAD PDIP
20
19
18
17
16
15
14
13
12
11
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
V
CC
ACLK
SCLK
D
IN
D
OUT
CS
REF
+
REF
–
V
–
AGND
LTC1090ACN
LTC1090CN
LTC1090CSW
LTC1090AMJ
LTC1090MJ
LTC1090ACJ
LTC1090CJ
ORDER PART
NUMBER
T
JMAX
= 150°C, θ
JA
= 70°C/W
T
JMAX
= 110°C, θ
JA
= 90°C/W
LTC1090 • POI01