LTC1196/LTC1198
8-Bit, SO-8, 1Msps ADCs
with Auto-Shutdown Options
FEATURES
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DESCRIPTION
The LTC
®
1196/LTC1198 are 600ns, 8-bit A/D converters
with sampling rates up to 1MHz. They are offered in 8-pin
SO packages and operate on 3V to 6V supplies. Power
dissipation is only 10mW with a 3V supply or 50mW with
a 5V supply. The LTC1198 automatically powers down to a
typical supply current of 1nA whenever it is not performing
conversions. These 8-bit switched-capacitor successive
approximation ADCs include sample-and-holds. The
LTC1196 has a differential analog input; the LTC1198 of-
fers a software selectable 2-channel MUX.
The 3-wire serial I/O, SO-8 packages, 3V operation and
extremely high sample rate-to-power ratio make these
ADCs an ideal choice for compact, high speed systems.
These ADCs can be used in ratiometric applications or
with external references. The high impedance analog in-
puts and the ability to operate with reduced spans below
1V full scale (LTC1196) allow direct connection to signal
sources in many applications, eliminating the need for
gain stages.
The A grade devices are specified with total unadjusted
error of ±1/2LSB maximum over temperature.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
High Sampling Rates: 1MHz (LTC1196)
750kHz (LTC1198)
Low Cost
Single Supply 3V and 5V Specifications
Low Power: 10mW at 3V Supply
50mW at 5V Supply
Auto-Shutdown: 1nA Typical (LTC1198)
±1/2LSB Total Unadjusted Error over Temperature
3-Wire Serial I/O
1V to 5V Input Span Range (LTC1196)
Converts 1MHz Inputs to 7 Effective Bits
Differential Inputs (LTC1196)
2-Channel MUX (LTC1198)
SO-8 Plastic Package
APPLICATIONS
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High Speed Data Acquisition
Disk Drives
Portable or Compact Instrumentation
Low Power or Battery-Operated Systems
TYPICAL APPLICATION
Single 5V Supply, 1Msps, 8-Bit Sampling ADC
1μF
5V
EFFECTIVE NUMBER OF BITS (ENOBs)
Effective Bits and S/(N + D) vs Input Frequency
8
7
6
5
4
3
2
1
0
1k
T
A
= 25°C
10k
100k
INPUT FREQUENCY (Hz)
1M
1196/98 G24
50
V
REF
= V
CC
= 2.7V
f
SMPL
= 383kHz (LTC1196)
f
SMPL
= 287kHz (LTC1198)
V
REF
= V
CC
= 5V
f
SMPL
= 1MHz (LTC1196)
f
SMPL
= 750kHz (LTC1198)
44
S/(N + D) (dB)
1
2
ANALOG INPUT
0V TO 5V RANGE
3
4
CS
+IN
–IN
GND
LTC1196
V
CC
CLK
D
OUT
V
REF
8
7
6
5
1196/98 TA01
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP,
OR SHIFT REGISTERS
119698fa
1
LTC1196/LTC1198
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Supply Voltage (V
CC
) to GND .................................... 7V
Voltage
Analog Reference ....................... –0.3V to V
CC
+ 0.3V
Digital Inputs ......................................... –0.3V to 7V
Digital Outputs ........................... –0.3V to V
CC
+ 0.3V
Power Dissipation .............................................. 500mW
Operating Temperature Range
LTC1196-1AC, LTC1198-1AC, LTC1196-1BC,
LTC1198-1BC, LTC1196-2AC, LTC1198-2AC,
LTC1196-2BC, LTC1198-2BC ................. 0°C to 70°C
Storage Temperature Range.................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................ 300°C
PIN CONFIGURATION
LTC1196
CS
1
+IN 2
–IN 3
GND 4
TOP VIEW
8
7
6
5
V
CC
CLK
D
OUT
V
REF
LTC1198
CS/
1
SHUTDOWN
CH0 2
CH1 3
GND 4
TOP VIEW
8
7
6
5
V
CC
(V
REF
)
CLK
D
OUT
D
IN
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 175°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 175°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC1196-1ACS8#PBF
LTC1196-1BCS8#PBF
LTC1196-2ACS8#PBF
LTC1196-2BCS8#PBF
LTC1198-1ACS8#PBF
LTC1198-1BCS8#PBF
LTC1198-2ACS8#PBF
LTC1198-2BCS8#PBF
TAPE AND REEL
LTC1196-1ACS8#TRPBF
LTC1196-1BCS8#TRPBF
LTC1196-2ACS8#TRPBF
LTC1196-2BCS8#TRPBF
LTC1198-1ACS8#TRPBF
LTC1198-1BCS8#TRPBF
LTC1198-2ACS8#TRPBF
LTC1198-2BCS8#TRPBF
PART MARKING
11961A
11961B
11962A
11962B
11981A
11981B
11982A
11982B
PACKAGE DESCRIPTION
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
119698fa
2
LTC1196/LTC1198
RECOMMENDED OPERATING CONDITIONS
the full operating temperature range, otherwise specifications are at T
A
= 25°C.
SYMBOL
V
CC
f
CLK
t
CYC
t
SMPL
t
hCS
t
suCS
t
hDI
t
suDI
t
WHCLK
t
WLCLK
t
WHCS
t
WLCS
PARAMETER
Supply Voltage
Clock Frequency
Total Cycle Time
Analog Input Sampling Time
Hold Time
CS
Low After Last CLK↑
Setup Time
CS↓
Before First CLK↑
(See Figures 1, 2)
Hold Time D
IN
After CLK↑
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
LTC1196
LTC1198
LTC1198
LTC1198
f
CLK
= f
CLK(MAX)
f
CLK
= f
CLK(MAX)
LTC1196
LTC1198
CONDITIONS
MIN
2.7
0.01
0.01
12
16
2.5
10
20
20
20
40%
40%
25
11
15
The
l
denotes the specifications which apply over
LTC1196-1
LTC1198-1
TYP
LTC1196-2
LTC1198-2
TYP
MAX
6
12.0
9.6
MAX
6
14.4
12.0
MIN
2.7
0.01
0.01
12
16
2.5
13
26
26
26
40%
40%
32
11
15
UNITS
V
MHz
MHz
CLK
CLK
CLK
ns
ns
ns
ns
1/f
CLK
1/f
CLK
ns
CLK
CLK
V
CC
= 5V Operation
l
CONVERTER AND MULTIPLEXER CHARACTERISTICS
LTC1196-1
LTC1198-1
TYP
The
l
denotes the specifications
which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
REF
= 5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
LTC1196-2
LTC1198-2
TYP
MAX
±1
±1
±1
±1
PARAMETER
No Missing Codes Resolution
Offset Error
Linearity Error
Full-Scale Error
Total Unadjusted Error (Note 4)
Analog and REF Input Range
Analog Input Leakage Current
CONDITIONS
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MIN
8
MAX
±1/2
±1/2
±1/2
±1/2
MIN
8
UNITS
Bits
LSB
LSB
LSB
LSB
V
(Note 3)
LTC1196, V
REF
= 5.000V
LTC1198, V
CC
= 5.000V
LTC1196
(Note 5)
–0.05V to V
CC
+ 0.05V
l
±1
±1
μA
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
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
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
The
l
denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
REF
= 5V, unless otherwise noted.
MIN
l
l
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l
l
l
TYP
MAX
0.8
2.5
–2.5
UNITS
V
V
μA
μA
V
V
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2.0
4.5
2.4
4.74
4.71
3
LTC1196/LTC1198
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
SYMBOL
V
OL
I
OZ
I
SOURCE
I
SINK
I
REF
I
CC
PARAMETER
Low Level Output Voltage
Hi-Z Output Leakage
Output Source Current
Output Sink Current
Reference Current, LTC1196
Supply Current
CONDITIONS
V
CC
= 4.75V, I
O
= 1.6mA
CS
= High
V
OUT
= 0V
V
OUT
= V
CC
CS
= V
CC
f
SMPL
= f
SMPL(MAX)
CS
= V
CC
, LTC1198 (Shutdown)
CS
= V
CC
, LTC1196
f
SMPL
= f
SMPL(MAX)
, LTC1196/LTC1198
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The
l
denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
REF
= 5V, unless otherwise noted.
MIN
TYP
MAX
0.4
±3
–25
45
0.001
0.5
0.001
7
11
3
1
3
15
20
UNITS
V
μA
mA
mA
μA
mA
μA
mA
mA
DYNAMIC ACCURACY
SYMBOL PARAMETER
S/(N + D) Signal-to-Noise Plus Distortion
THD
IMD
Total Harmonic Distortion
Peak Harmonic or Spurious Noise
Intermodulation Distortion
Full-Power Bandwidth
The
l
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
REF
= 5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions,
unless otherwise noted.
CONDITIONS
500kHz/1MHz Input Signal
500kHz/1MHz Input Signal
500kHz/1MHz Input Signal
f
IN1
= 499.37kHz
f
IN2
= 502.446kHz
MIN
LTC1196
TYP
47/45
49/47
55/48
51
8
1
MAX
MIN
LTC1198
TYP
47/45
49/47
55/48
51
8
1
MAX
UNITS
dB
dB
dB
dB
MHz
MHz
Full Linear Bandwidth [S/(N + D) > 44dB
AC CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
REF
= 5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions,
unless otherwise noted.
LTC1196-1
LTC1198-1
TYP
LTC1196-2
LTC1198-2
TYP
SYMBOL
t
CONV
PARAMETER
Conversion Time (See Figures 1, 2)
CONDITIONS
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MIN
MAX
600
710
MIN
MAX
710
900
UNITS
ns
ns
MHz
MHz
MHz
MHz
f
SMPL(MAX)
Maximum Samping Frequency
LTC1196
LTC1196
LTC1198
LTC1198
C
LOAD
= 20pF
l
l
l
l
l
l
l
l
1.20
1.00
0.90
0.75
55
70
30
30
45
5
5
30
5
5
15
15
64
73
120
50
1.00
0.80
0.75
0.60
68
88
43
30
55
10
10
30
5
5
20
20
78
94
150
63
t
dDO
t
DIS
t
en
t
hDO
t
f
t
r
C
IN
Delay Time, CLK↑ to D
OUT
Data Valid
Delay Time
CS↑
to D
OUT
Hi-Z
Delay Time, CLK↓ to D
OUT
Enabled
Time Output Data Remains Valid After
CLK↑
D
OUT
Fall Time
D
OUT
Rise
Input Capacitance
ns
ns
ns
ns
ns
ns
ns
pF
pF
pF
119698fa
C
LOAD
= 20pF
C
LOAD
= 20pF
C
LOAD
= 20pF
C
LOAD
= 20pF
Analog Input On Channel
Analog Input Off Channel
Digital Input
4
LTC1196/LTC1198
RECOMMENDED OPERATING CONDITIONS
SYMBOL
f
CLK
t
CYC
t
SMPL
t
hCS
t
suCS
t
hDI
t
suDI
t
WHCLK
t
WLCLK
t
WHCS
t
WLCS
PARAMETER
Clock Frequency
Total Cycle Time
Analog Input Sampling Time
Hold Time
CS
Low After Last CLK↑
Setup Time
CS↓
Before First CLK↑
(See Figures 1, 2)
Hold Time D
IN
After CLK↑
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
LTC1196
LTC1198
LTC1198
LTC1198
f
CLK
= f
CLK(MAX)
f
CLK
= f
CLK(MAX)
LTC1196
LTC1198
CONDITIONS
l
The
l
denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V Operation.
LTC1196-1
LTC1198-1
TYP
LTC1196-2
LTC1198-2
TYP
MIN
0.01
0.01
12
16
2.5
20
40
40
40
40%
40%
50
11
15
MAX
5.4
4.6
MIN
0.01
0.01
12
16
2.5
40
78
78
78
40%
40%
96
11
15
MAX
4
3
UNITS
MHz
MHz
CLK
CLK
CLK
ns
ns
ns
ns
1/f
CLK
1/f
CLK
ns
CLK
CLK
CONVERTER AND MULTIPLEXER CHARACTERISTICS
LTC1196-1
LTC1198-1
TYP
The
l
denotes the specifications
which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V, V
REF
= 2.5V,
f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
LTC1196-2
LTC1198-2
TYP
MAX
±1
±1
±1
±1
PARAMETER
No Missing Codes Resolution
Offset Error
Linearity Error
Full-Scale Error
Total Unadjusted Error (Note 4)
Analog and REF Input Range
Analog Input Leakage Current
CONDITIONS
l
l
l
l
l
MIN
8
MAX
±1/2
±1/2
±1/2
±1/2
MIN
8
UNITS
Bits
LSB
LSB
LSB
LSB
V
(Note 3)
LTC1196, V
REF
= 2.5.000V
LTC1198, V
CC
= 2.700V
LTC1196
(Note 5)
–0.05V to V
CC
+ 0.05V
l
±1
±1
μA
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
SYMBOL
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OZ
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
CONDITIONS
V
CC
= 3.6V
V
CC
= 2.7V
V
IN
= V
CC
V
IN
= 0V
V
CC
= 2.7V, I
O
= 10μA
V
CC
= 2.7V, I
O
= 360μA
V
CC
= 2.7V, I
O
= 400μA
CS
= High
The
l
denotes the specifications which apply
over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V, V
REF
= 2.5V, unless otherwise noted.
MIN
l
l
l
l
l
l
l
l
TYP
MAX
0.45
2.5
–2.5
UNITS
V
V
μA
μA
V
V
1.9
2.3
2.1
2.60
2.45
0.3
±3
V
μA
119698fa
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