1
LTC1096/LTC1096L
LTC1098/LTC1098L
Micropower Sampling
8-Bit Serial I/O A/D Converters
D
U
ESCRIPTIO
S
FEATURE
s
80
A Maximum Supply Current
s
1nA Typical Supply Current in Shutdown
s
8-Pin SO Plastic Package
s
5V Operation (LTC1096/LTC1098)
s
3V Operation (LTC1096L/LTC1098L)(2.65V Min)
s
Sample-and-Hold
s
16
s Conversion Time
s
33kHz Sample Rate
s
0.5LSB Total Unadjusted Error Over Temp
s
Direct 3-Wire Interface to Most MPU Serial Ports and
All MPU Parallel I/O Ports
The LTC
1096/LTC1096L/LTC1098/LTC1098L are
micropower, 8-bit A/D converters that draw only 80
A of
supply current when converting. They automatically power
down to 1nA typical supply current whenever they are not
performing conversions. They are packaged in 8-pin SO
packages and have both 3V (L) and 5V versions. These
8-bit, switched-capacitor, successive approximation ADCs
include sample-and-hold. The LTC1096/LTC1096L have a
single differential analog input. The LTC1098/LTC1098L
offer a software selectable 2-channel MUX.
On-chip serial ports allow efficient data transfer to a wide
range of microprocessors and microcontrollers over three
wires. This, coupled with micropower consumption, makes
remote location possible and facilitates transmitting data
through isolation barriers.
These circuits can be used in ratiometric applications or
with an external reference. The high impedance analog
inputs and the ability to operate with reduced spans
(below 1V full scale) allow direct connection to sensors
and transducers in many applications, eliminating the
need for gain stages.
U
S
A
O
PPLICATI
s
Battery-Operated Systems
s
Remote Data Acquisition
s
Battery Monitoring
s
Battery Gas Gauges
s
Temperature Measurement
s
Isolated Data Acquisition
, LTC and LT are registered trademarks of Linear Technology Corporation.
Supply Current vs Sample Rate
SAMPLE FREQUENCY, f
SMPL
(kHz)
0.1
1
SUPPLY CURRENT, I
CC
(
A)
10
100
1000
1
10
100
LTC1096/98 TPC03
T
A
= 25C
V
CC
= V
REF
= 5V
10
W, S8 Package, 8-Bit A/D
Samples at 200Hz and Runs Off a 5V Battery
5V
1
F
ANALOG INPUT
0V TO 5V RANGE
IN
GND
V
CC
CLK
D
OUT
V
REF
LTC1096
MPU
(e.g., 8051)
P1.4
P1.3
P1.2
+IN
LTC1096/8 TA01
CS/
SHUTDOWN
U
A
O
PPLICATI
TYPICAL
2
LTC1096/LTC1096L
LTC1098/LTC1098L
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
Operating Temperature
LTC1096AC/LTC1096C/LTC1096LC/
LTC1098AC/LTC1098C/LTC1098LC ....... 0
C to 70
C
LTC1096AI/LTC1096I/LTC1096LI/
LTC1098AI/LTC1098I/LTC1098LI ..... 40
C to 85
C
Lead Temperature (Soldering, 10 sec.) ................ 300
C
Supply Voltage (V
CC
) to GND ................................... 12V
Voltage
Analog and Reference ................ 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
Storage Temperature Range ................. 65
C to 150
C
(Notes 3)
W
U
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
LTC1098ACN8
LTC1098ACS8
LTC1098AIN8
LTC1098AIS8
LTC1098CN8
LTC1098CS8
LTC1098IN8
LTC1098IS8
LTC1098LCS8
LTC1098LIS8
(Notes 1 and 2)
ORDER PART
NUMBER
LTC1096ACN8
LTC1096ACS8
LTC1096AIN8
LTC1096AIS8
LTC1096CN8
LTC1096CS8
LTC1096IN8
LTC1096IS8
LTC1096LCS8
LTC1096LIS8
1
2
3
4
8
7
6
5
TOP VIEW
+IN
IN
GND
V
CC
CLK
D
OUT
V
REF
N8 PACKAGE
8-LEAD PLASTIC DIP
CS/
SHUTDOWN
S8 PACKAGE
8-LEAD PLASTIC SOIC
T
JMAX
= 150
C,
JA
= 130
C/W (N8)
T
JMAX
= 150
C,
JA
= 175
C/W (S8)
S8 PART MARKING
1096
1096A
1096L
1096LI
1096I
1096IA
1
2
3
4
8
7
6
5
TOP VIEW
CH0
CH1
GND
V
CC
(V
REF)
CLK
D
OUT
D
IN
N8 PACKAGE
8-LEAD PLASTIC DIP
CS/
SHUTDOWN
S8 PACKAGE
8-LEAD PLASTIC SOIC
T
JMAX
= 150
C,
JA
= 130
C/W (N8)
T
JMAX
= 150
C,
JA
= 175
C/W (S8)
1098L
1098LI
1098
1098A
1098I
1098IA
Consult factory for Military grade parts.
RECO E DED OPERATI G CO DITIO S
W
U
W
U
U
U
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
Supply Voltage
LTC1096
3.0
9
V
LTC1098
3.0
6
V
V
CC
= 5V Operation
f
CLK
Clock Frequency
V
CC
= 5V
25
500
kHz
t
CYC
Total Cycle Time
LTC1096, f
CLK
= 500kHz
29
s
LTC1098, f
CLK
= 500kHz
29
s
t
hDI
Hold Time, D
IN
After CLK
V
CC
= 5V
150
ns
t
suCS
Setup Time CS
Before First CLK
(See Operating Sequence)
V
CC
= 5V, LTC1096
500
ns
V
CC
= 5V, LTC1098
500
ns
t
WAKEUP
Wake-Up Time CS
Before First CLK
After First CLK
V
CC
= 5V, LTC1096
10
s
(See Figure 1 LTC1096 Operating Sequence)
Wake-Up Time CS
Before MSBF Bit CLK
V
CC
= 5V, LTC1098
10
s
(See Figure 2 LTC1098 Operating Sequence)
t
suDI
Setup Time, D
IN
Stable Before CLK
V
CC
= 5V
400
ns
t
WHCLK
CLK High Time
V
CC
= 5V
0.8
s
S8 PART MARKING
LTC1096/LTC1098
3
LTC1096/LTC1096L
LTC1098/LTC1098L
RECO E DED OPERATI G CO DITIO S
W
U
W
U
U
U
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
Supply Voltage
2.65
4.0
V
f
CLK
Clock Frequency
V
CC
= 2.65V
25
250
kHz
t
CYC
Total Cycle Time
LTC1096L, f
CLK
= 250kHz
58
s
LTC1098L, f
CLK
= 250kHz
58
s
t
hDI
Hold Time, D
IN
After CLK
V
CC
= 2.65V
450
ns
t
suCS
Setup Time CS
Before First CLK
(See Operating Sequence)
V
CC
= 2.65V, LTC1096L
1
s
V
CC
= 2.65V, LTC1098L
1
s
t
WAKEUP
Wake-Up Time CS
Before First CLK
After First CLK
V
CC
= 2.65V, LTC1096L
10
s
(See Figure 1, LTC1096L Operating Sequence)
Wake-Up Time CS
Before MSBF Bit CLK
V
CC
= 2.65V, LTC1098L
10
s
(See Figure 2, LTC1098L Operating Sequence)
t
suDI
Setup Time, D
IN
Stable Before CLK
V
CC
= 2.65V
1
s
t
WHCLK
CLK High Time
V
CC
= 2.65V
1.6
s
t
WLCLK
CLK Low Time
V
CC
= 2.65V
1.6
s
t
WHCS
CS High Time Between Data Transfer Cycles
V
CC
= 2.65V
2
s
t
WLCS
CS Low Time During Data Transfer
LTC1096L, f
CLK
= 250kHz
56
s
LTC1098L, f
CLK
= 250kHz
56
s
LTC1096/LTC1098
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
t
WLCLK
CLK Low Time
V
CC
= 5V
0.8
s
t
WHCS
CS High Time Between Data Transfer Cycles
V
CC
= 5V
1
s
t
WLCS
CS Low Time During Data Transfer
LTC1096, f
CLK
= 500kHz
28
s
LTC1098, f
CLK
= 500kHz
28
s
V
CC
= 3V Operation
f
CLK
Clock Frequency
V
CC
= 3V
25
250
kHz
t
CYC
Total Cycle Time
LTC1096, f
CLK
= 250kHz
58
s
LTC1098, f
CLK
= 250kHz
58
s
t
hDI
Hold Time, D
IN
After CLK
V
CC
= 3V
450
ns
t
suCS
Setup Time CS
Before First CLK
(See Operating Sequence)
V
CC
= 3V, LTC1096
1
s
V
CC
= 3V, LTC1098
1
s
t
WAKEUP
Wake-Up Time CS
Before First CLK
After First CLK
V
CC
= 3V, LTC1096
10
s
(See Figure 1 LTC1096 Operating Sequence)
Wake-Up Time CS
Before MSBF Bit CLK
V
CC
= 3V, LTC1098
10
s
(See Figure 2 LTC1098 Operating Sequence)
t
suDI
Setup Time, D
IN
Stable Before CLK
V
CC
= 3V
1
s
t
WHCLK
CLK High Time
V
CC
= 3V
1.6
s
t
WLCLK
CLK Low Time
V
CC
= 3V
1.6
s
t
WHCS
CS High Time Between Data Transfer Cycles
V
CC
= 3V
2
s
t
WLCS
CS Low Time During Data Transfer
LTC1096, f
CLK
= 250kHz
56
s
LTC1098, f
CLK
= 250kHz
56
s
LTC1096L/LTC1098L
4
LTC1096/LTC1096L
LTC1098/LTC1098L
CO VERTER A D ULTIPLEXER CHARACTERISTICS
U
U W
LTC1096/LTC1098
LTC1096A/LTC1098A
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Resolution (No Missing Code)
q
8
8
Bits
Offset Error
q
0.5
0.5
LSB
Linearity Error
(Note 4)
q
0.5
0.5
LSB
Full Scale Error
q
0.5
1.0
LSB
Total Unadjusted Error (Note 5)
V
REF
= 5.000V
q
0.5
1.0
LSB
Analog Input Range
(Notes 6, 7)
V
REF Input Range (Notes 6, 7)
4.5
V
CC
6V
V
6V < V
CC
9V, LTC1096
V
Analog Input Leakage Current
(Note 8)
q
1.0
1.0
A
0.05V to V
CC
+ 0.05V
0.05V to V
CC
+ 0.05V
0.05V to 6V
LTC1096/LTC1098
V
CC
= 5V, V
REF
= 5V, f
CLK
= 500kHz, unless otherwise noted.
LTC1096/LTC1098
LTC1096A/LTC1098A
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Resolution (No Missing Code)
q
8
8
Bits
Offset Error
q
0.75
1.0
LSB
Linearity Error
(Notes 4, 9)
q
0.5
1.0
LSB
Full-Scale Error
q
1.0
1.0
LSB
Total Unadjusted Error (Notes 5, 9)
V
REF
= 2.500V
q
1.0
1.5
LSB
Analog Input Range
(Notes 6, 7)
V
REF Input Range (Notes 6, 7, 9)
3V
V
CC
6V
V
Analog Input Leakage Current
(Notes 8, 9)
q
1.0
1.0
A
0.05V to V
CC
+ 0.05V
0.05V to V
CC
+ 0.05V
LTC1096/LTC1098
V
CC
= 3V, V
REF
= 2.5V, f
CLK
= 250kHz, unless otherwise noted.
LTC1096L/LTC1098L
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Code)
q
8
Bits
Offset Error
q
1.0
LSB
Linearity Error
(Note 4)
q
1.0
LSB
Full-Scale Error
q
1.0
LSB
Total Unadjusted Error (Notes 5)
V
REF
= 2.5V
q
1.5
LSB
Analog Input Range
(Notes 6, 7)
0.05V to V
CC
+ 0.05V
V
REF Input Range (Note 6)
2.65V
V
CC
4.0V
0.05V to V
CC
+ 0.05V
V
Analog Input Leakage Current
(Note 8)
q
1.0
A
LTC1096L/LTC1098L
V
CC
= 2.65V, V
REF
= 2.5V, f
CLK
= 250kHz, unless otherwise noted.
5
LTC1096/LTC1096L
LTC1098/LTC1098L
DIGITAL A
N
D DC ELECTRICAL CHARACTERISTICS
U
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IH
High Level Input Voltage
V
CC
= 5.25V
q
2.0
V
V
IL
Low Level Input Voltage
V
CC
= 4.75V
q
0.8
V
I
IH
High Level Input Current
V
IN
= V
CC
q
2.5
A
I
IL
Low Level Input Current
V
IN
= 0V
q
2.5
A
V
OH
High Level Output Voltage
V
CC
= 4.75V, I
O
= 10
A
q
4.5
4.74
V
V
CC
= 4.75V, I
O
= 360
A
q
2.4
4.72
V
V
OL
Low Level Output Voltage
V
CC
= 4.75V, I
O
= 1.6mA
q
0.4
V
I
OZ
Hi-Z Output Leakage
CS
V
IH
q
3.0
A
I
SOURCE
Output Source Current
V
OUT
= 0V
25
mA
I
SINK
Output Sink Current
V
OUT
= V
CC
45
mA
I
REF
Reference Current
CS = V
CC
q
0.001
2.5
A
t
CYC
200
s, f
CLK
50kHz
q
3.500
7.5
A
t
CYC
= 29
s, f
CLK
= 500kHz
q
35.000
50.0
A
I
CC
Supply Current
CS = V
CC
q
0.001
3.0
A
LTC1096, t
CYC
200
s, f
CLK
50kHz
q
40
80
A
LTC1096, t
CYC
= 29
s, f
CLK
= 500kHz
q
120
180
A
LTC1098, t
CYC
200
s, f
CLK
50kHz
q
44
88
A
LTC1098, t
CYC
= 29
s, f
CLK
= 500kHz
q
155
230
A
LTC1096/LTC1098
V
CC
= 5V, V
REF
= 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IH
High Level Input Voltage
V
CC
= 3.6V
q
1.9
V
V
IL
Low Level Input Voltage
V
CC
= 3V
q
0.45
V
I
IH
High Level Input Current (Note 9)
V
IN
= V
CC
q
2.5
A
I
IL
Low Level Input Current (Note 9)
V
IN
= 0V
q
2.5
A
V
OH
High Level Output Voltage
V
CC
= 3V, I
O
= 10
A
q
2.3
2.69
V
V
CC
= 3V, I
O
= 360
A
q
2.1
2.64
V
V
OL
Low Level Output Voltage
V
CC
= 3V, I
O
= 400
A
q
0.3
V
I
OZ
Hi-Z Output Leakage (Note 9)
CS
V
IH
q
3.0
A
I
SOURCE
Output Source Current (Note 9)
V
OUT
= 0V
10
mA
I
SINK
Output Sink Current (Note 9)
V
OUT
= V
CC
15
mA
I
REF
Reference Current (Note 9)
CS = V
CC
q
0.001
2.5
A
t
CYC
200
s, f
CLK
50kHz
q
3.500
7.5
A
t
CYC
= 58
s, f
CLK
= 250kHz
q
35.000
50.0
A
I
CC
Supply Current (Note 9)
CS = V
CC
q
0.001
3.0
A
LTC1096, t
CYC
200
s, f
CLK
50kHz
q
40
80
A
LTC1096, t
CYC
= 58
s, f
CLK
= 250kHz
q
120
180
A
LTC1098, t
CYC
200
s, f
CLK
50kHz
q
44
88
A
LTC1098, t
CYC
= 58
s, f
CLK
= 250kHz
q
155
230
A
LTC1096/LTC1098
V
CC
= 3V, V
REF
= 2.5V, unless otherwise noted.
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