LTC1096/LTC1096L
LTC1098/LTC1098L
Micropower Sampling
8-Bit Serial I/O A/D Converters
FEATURES
s
s
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s
s
DESCRIPTIO
80µA Maximum Supply Current
1nA Typical Supply Current in Shutdown
8-Pin SO Plastic Package
5V Operation (LTC1096/LTC1098)
3V Operation (LTC1096L/LTC1098L)(2.65V Min)
Sample-and-Hold
16µs Conversion Time
33kHz Sample Rate
±0.5LSB
Total Unadjusted Error Over Temp
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 80µA 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.
APPLICATI
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Battery-Operated Systems
Remote Data Acquisition
Battery Monitoring
Battery Gas Gauges
Temperature Measurement
Isolated Data Acquisition
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATI
10µW, S8 Package, 8-Bit A/D
Samples at 200Hz and Runs Off a 5V Battery
1µF
5V
Supply Current vs Sample Rate
1000
T
A
= 25°C
V
CC
= V
REF
= 5V
SUPPLY CURRENT, I
CC
(µA)
MPU
(e.g., 8051)
CS/
V
CC
SHUTDOWN
CLK
+IN
LTC1096
–IN
D
OUT
GND
V
REF
LTC1096/8 • TA01
100
P1.4
P1.3
P1.2
ANALOG INPUT
0V TO 5V RANGE
10
1
0.1
1
10
SAMPLE FREQUENCY, f
SMPL
(kHz)
100
U
LTC1096/98 • TPC03
UO
UO
1
LTC1096/LTC1096L
LTC1098/LTC1098L
ABSOLUTE
AXI U
RATI GS
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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CS/
1
SHUTDOWN
+IN 2
–IN 3
GND 4
N8 PACKAGE
8-LEAD PLASTIC DIP
8
7
6
5
V
CC
CLK
D
OUT
V
REF
ORDER PART
NUMBER
LTC1096ACN8
LTC1096ACS8
LTC1096AIN8
LTC1096AIS8
LTC1096CN8
LTC1096CS8
LTC1096IN8
LTC1096IS8
LTC1096LCS8
LTC1096LIS8
S8 PACKAGE
8-LEAD PLASTIC SOIC
T
JMAX
= 150°C,
θ
JA
= 130°C/W (N8)
T
JMAX
= 150°C,
θ
JA
= 175°C/W (S8)
S8 PART MARKING
1096
1096A
1096I
1096IA
1096L
1096LI
Consult factory for Military grade parts.
RECO
SYMBOL
V
CC
E DED OPERATI G CO DITIO S
CONDITIONS
LTC1096
LTC1098
V
CC
= 5V
LTC1096, f
CLK
= 500kHz
LTC1098, f
CLK
= 500kHz
V
CC
= 5V
V
CC
= 5V, LTC1096
V
CC
= 5V, LTC1098
V
CC
= 5V, LTC1096
V
CC
= 5V, LTC1098
V
CC
= 5V
V
CC
= 5V
MIN
3.0
3.0
25
29
29
150
500
500
10
10
400
0.8
TYP
MAX
9
6
500
UNITS
V
V
kHz
µs
µs
ns
ns
ns
µs
µs
ns
µs
LTC1096/LTC1098
PARAMETER
Supply Voltage
V
CC
= 5V Operation
f
CLK
t
CYC
t
hDI
t
suCS
t
WAKEUP
Clock Frequency
Total Cycle Time
Hold Time, D
IN
After CLK↑
Setup Time CS↓ Before First CLK↑ (See Operating Sequence)
Wake-Up Time CS↓ Before First CLK↓ After First CLK↑
(See Figure 1 LTC1096 Operating Sequence)
Wake-Up Time CS↓ Before MSBF Bit CLK↓
(See Figure 2 LTC1098 Operating Sequence)
t
suDI
t
WHCLK
Setup Time, D
IN
Stable Before CLK↑
CLK High Time
2
U
U
U
U
U
W
W W
U
W
(Notes 1 and 2)
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
(Notes 3)
TOP VIEW
CS/
1
SHUTDOWN
CH0 2
CH1 3
GND 4
N8 PACKAGE
8-LEAD PLASTIC DIP
8
7
6
5
V
CC
(V
REF)
CLK
D
OUT
D
IN
ORDER PART
NUMBER
LTC1098ACN8
LTC1098ACS8
LTC1098AIN8
LTC1098AIS8
LTC1098CN8
LTC1098CS8
LTC1098IN8
LTC1098IS8
LTC1098LCS8
LTC1098LIS8
S8 PACKAGE
8-LEAD PLASTIC SOIC
T
JMAX
= 150°C,
θ
JA
= 130°C/W (N8)
T
JMAX
= 150°C,
θ
JA
= 175°C/W (S8)
S8 PART MARKING
1098
1098A
1098I
1098IA
1098L
1098LI
U WW
LTC1096/LTC1096L
LTC1098/LTC1098L
RECO
SYMBOL
t
WLCLK
t
WHCS
t
WLCS
E DED OPERATI G CO DITIO S
CONDITIONS
V
CC
= 5V
V
CC
= 5V
LTC1096, f
CLK
= 500kHz
LTC1098, f
CLK
= 500kHz
V
CC
= 3V
LTC1096, f
CLK
= 250kHz
LTC1098, f
CLK
= 250kHz
V
CC
= 3V
V
CC
= 3V, LTC1096
V
CC
= 3V, LTC1098
V
CC
= 3V, LTC1096
V
CC
= 3V, LTC1098
V
CC
= 3V
V
CC
= 3V
V
CC
= 3V
V
CC
= 3V
LTC1096, f
CLK
= 250kHz
LTC1098, f
CLK
= 250kHz
MIN
0.8
1
28
28
25
58
58
450
1
1
10
10
1
1.6
1.6
2
56
56
250
TYP
MAX
UNITS
µs
µs
µs
µs
kHz
µs
µs
ns
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
LTC1096/LTC1098
PARAMETER
CLK Low Time
CS High Time Between Data Transfer Cycles
CS Low Time During Data Transfer
V
CC
= 3V Operation
f
CLK
t
CYC
t
hDI
t
suCS
t
WAKEUP
Clock Frequency
Total Cycle Time
Hold Time, D
IN
After CLK↑
Setup Time CS↓ Before First CLK↑ (See Operating Sequence)
Wake-Up Time CS↓ Before First CLK↓ After First CLK↑
(See Figure 1 LTC1096 Operating Sequence)
Wake-Up Time CS↓ Before MSBF Bit CLK↓
(See Figure 2 LTC1098 Operating Sequence)
t
suDI
t
WHCLK
t
WLCLK
t
WHCS
t
WLCS
Setup Time, D
IN
Stable Before CLK↑
CLK High Time
CLK Low Time
CS High Time Between Data Transfer Cycles
CS Low Time During Data Transfer
LTC1096L/LTC1098L
SYMBOL
V
CC
f
CLK
t
CYC
t
hDI
t
suCS
t
WAKEUP
PARAMETER
Supply Voltage
Clock Frequency
Total Cycle Time
Hold Time, D
IN
After CLK↑
Setup Time CS↓ Before First CLK↑ (See Operating Sequence)
Wake-Up Time CS↓ Before First CLK↓ After First CLK↑
(See Figure 1, LTC1096L Operating Sequence)
Wake-Up Time CS↓ Before MSBF Bit CLK↓
(See Figure 2, LTC1098L Operating Sequence)
t
suDI
t
WHCLK
t
WLCLK
t
WHCS
t
WLCS
Setup Time, D
IN
Stable Before CLK↑
CLK High Time
CLK Low Time
CS High Time Between Data Transfer Cycles
CS Low Time During Data Transfer
V
CC
= 2.65V
LTC1096L, f
CLK
= 250kHz
LTC1098L, f
CLK
= 250kHz
V
CC
= 2.65V
V
CC
= 2.65V, LTC1096L
V
CC
= 2.65V, LTC1098L
V
CC
= 2.65V, LTC1096L
V
CC
= 2.65V, LTC1098L
V
CC
= 2.65V
V
CC
= 2.65V
V
CC
= 2.65V
V
CC
= 2.65V
LTC1096L, f
CLK
= 250kHz
LTC1098L, f
CLK
= 250kHz
CONDITIONS
MIN
2.65
25
58
58
450
1
1
10
10
1
1.6
1.6
2
56
56
TYP
MAX
4.0
250
UNITS
V
kHz
µs
µs
ns
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
U
U
U
U WW
3
LTC1096/LTC1096L
LTC1098/LTC1098L
CO VERTER A D
LTC1096/LTC1098
V
CC
= 5V, V
REF
= 5V, f
CLK
= 500kHz, unless otherwise noted.
PARAMETER
Resolution (No Missing Code)
Offset Error
Linearity Error
Full Scale Error
Total Unadjusted Error (Note 5)
Analog Input Range
REF Input Range (Notes 6, 7)
Analog Input Leakage Current
V
REF
= 5.000V
(Notes 6, 7)
4.5
≤
V
CC
≤
6V
6V < V
CC
≤
9V, LTC1096
(Note 8)
q
LTC1096/LTC1098
V
CC
= 3V, V
REF
= 2.5V, f
CLK
= 250kHz, unless otherwise noted.
PARAMETER
Resolution (No Missing Code)
Offset Error
Linearity Error
Full-Scale Error
Total Unadjusted Error (Notes 5, 9)
Analog Input Range
REF Input Range (Notes 6, 7, 9)
Analog Input Leakage Current
V
REF
= 2.500V
(Notes 6, 7)
3V
≤
V
CC
≤
6V
(Notes 8, 9)
q
LTC1096L/LTC1098L
V
CC
= 2.65V, V
REF
= 2.5V, f
CLK
= 250kHz, unless otherwise noted.
PARAMETER
Resolution (No Missing Code)
Offset Error
Linearity Error
Full-Scale Error
Total Unadjusted Error (Notes 5)
Analog Input Range
REF Input Range (Note 6)
Analog Input Leakage Current
V
REF
= 2.5V
(Notes 6, 7)
2.65V
≤
V
CC
≤
4.0V
(Note 8)
q
4
W U
U
ULTIPLEXER CHARACTERISTICS
LTC1096A/LTC1098A
MIN
TYP
MAX
q
q
CONDITIONS
LTC1096/LTC1098
MIN
TYP
MAX
8
±0.5
±0.5
±1.0
±1.0
UNITS
Bits
LSB
LSB
LSB
LSB
V
V
V
8
±0.5
±0.5
±0.5
±0.5
(Note 4)
q
q
q
– 0.05V to V
CC
+ 0.05V
– 0.05V to V
CC
+ 0.05V
– 0.05V to 6V
±1.0
±1.0
µA
CONDITIONS
q
q
LTC1096A/LTC1098A
MIN
TYP
MAX
8
±0.75
±0.5
±1.0
±1.0
LTC1096/LTC1098
MIN
TYP
MAX
8
±1.0
±1.0
±1.0
±1.5
UNITS
Bits
LSB
LSB
LSB
LSB
V
V
(Notes 4, 9)
q
q
q
– 0.05V to V
CC
+ 0.05V
– 0.05V to V
CC
+ 0.05V
±1.0
±1.0
µA
CONDITIONS
q
q
MIN
8
LTC1096L/LTC1098L
TYP
MAX
±1.0
±1.0
±1.0
±1.5
UNITS
Bits
LSB
LSB
LSB
LSB
V
V
(Note 4)
q
q
q
– 0.05V to V
CC
+ 0.05V
– 0.05V to V
CC
+ 0.05V
±1.0
µA
LTC1096/LTC1096L
LTC1098/LTC1098L
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
LTC1096/LTC1098
V
CC
= 5V, V
REF
= 5V, unless otherwise noted.
SYMBOL
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OZ
I
SOURCE
I
SINK
I
REF
PARAMETER
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
Low Level Output Voltage
Hi-Z Output Leakage
Output Source Current
Output Sink Current
Reference Current
CONDITIONS
V
CC
= 5.25V
V
CC
= 4.75V
V
IN
= V
CC
V
IN
= 0V
V
CC
= 4.75V, I
O
= 10µA
V
CC
= 4.75V, I
O
= 360µA
V
CC
= 4.75V, I
O
= 1.6mA
CS
≥
V
IH
V
OUT
= 0V
V
OUT
= V
CC
CS = V
CC
t
CYC
≥
200µs, f
CLK
≤
50kHz
t
CYC
= 29µs, f
CLK
= 500kHz
CS = V
CC
LTC1096, t
CYC
≥
200µs, f
CLK
≤
50kHz
LTC1096, t
CYC
= 29µs, f
CLK
= 500kHz
LTC1098, t
CYC
≥
200µs, f
CLK
≤
50kHz
LTC1098, t
CYC
= 29µs, f
CLK
= 500kHz
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
I
CC
Supply Current
LTC1096/LTC1098
V
CC
= 3V, V
REF
= 2.5V, unless otherwise noted.
SYMBOL
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OZ
I
SOURCE
I
SINK
I
REF
PARAMETER
High Level Input Voltage
Low Level Input Voltage
High Level Input Current (Note 9)
Low Level Input Current (Note 9)
High Level Output Voltage
Low Level Output Voltage
Hi-Z Output Leakage (Note 9)
Output Source Current (Note 9)
Output Sink Current (Note 9)
Reference Current (Note 9)
CONDITIONS
V
CC
= 3.6V
V
CC
= 3V
V
IN
= V
CC
V
IN
= 0V
V
CC
= 3V, I
O
= 10µA
V
CC
= 3V, I
O
= 360µA
V
CC
= 3V, I
O
= 400µA
CS
≥
V
IH
V
OUT
= 0V
V
OUT
= V
CC
CS = V
CC
t
CYC
≥
200µs, f
CLK
≤
50kHz
t
CYC
= 58µs, f
CLK
= 250kHz
CS = V
CC
LTC1096, t
CYC
≥
200µs, f
CLK
≤
50kHz
LTC1096, t
CYC
= 58µs, f
CLK
= 250kHz
LTC1098, t
CYC
≥
200µs, f
CLK
≤
50kHz
LTC1098, t
CYC
= 58µs, f
CLK
= 250kHz
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
I
CC
Supply Current (Note 9)
U
MIN
2.0
TYP
MAX
0.8
2.5
– 2.5
UNITS
V
V
µA
µA
V
V
4.5
2.4
4.74
4.72
0.4
±3.0
– 25
45
0.001
3.500
35.000
0.001
40
120
44
155
2.5
7.5
50.0
3.0
80
180
88
230
V
µA
mA
mA
µA
µA
µA
µA
µA
µA
µA
µA
MIN
1.9
TYP
MAX
0.45
2.5
– 2.5
UNITS
V
V
µA
µA
V
V
2.3
2.1
2.69
2.64
0.3
±3.0
– 10
15
0.001
3.500
35.000
0.001
40
120
44
155
2.5
7.5
50.0
3.0
80
180
88
230
V
µA
mA
mA
µA
µA
µA
µA
µA
µA
µA
µA
5
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