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 offers 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, LTM, Linear Technology and the Linear logo 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
11968 TA01b
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
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
S/(N + D) (dB)
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP,
OR SHIFT REGISTERS
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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/
119698fb
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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
l
The
l
denotes the specifications which apply over
LTC1196-1
LTC1198-1
TYP
LTC1196-2
LTC1198-2
TYP
MAX
6
12.0
9.6
CONDITIONS
MIN
2.7
0.01
0.01
12
16
2.5
10
20
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
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
20
20
40%
40%
25
11
15
CONVERTER AND MULTIPLEXER 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.
LTC1196-1A/LTC1196-2A
LTC1198-1A/LTC1198-2A
LTC1196-1B/LTC1196-2B
LTC1198-1B/LTC1198-2B
MIN
8
±1/2
±1/2
±1/2
±1/2
–0.05V to V
CC
+ 0.05V
l
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
MIN
8
TYP
MAX
TYP
MAX
±1
±1
±1
±1
UNITS
Bits
LSB
LSB
LSB
LSB
V
(Note 3)
LTC1196, V
REF
= 5.000V
LTC1198, V
CC
= 5.000V
LTC1196
(Note 5)
l
l
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
l
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
l
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l
l
l
l
l
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
l
MIN
MAX
600
710
MIN
MAX
710
900
UNITS
ns
ns
MHz
MHz
MHz
MHz
f
SMPL(MAX)
Maximum Sampling Frequency
LTC1196
LTC1196
LTC1198
LTC1198
C
LOAD
= 20pF
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
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C
LOAD
= 20pF
C
LOAD
= 20pF
C
LOAD
= 20pF
C
LOAD
= 20pF
Analog Input On Channel
Analog Input Off Channel
Digital Input
l
l
l
l
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
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
CONDITIONS
MIN
0.01
0.01
12
16
2.5
20
40
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
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)
40
40
40%
40%
50
LTC1196
LTC1198
11
15
CONVERTER AND MULTIPLEXER CHARACTERISTICS
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.
LTC1196-1A/LTC1196-2A
LTC1198-1A/LTC1198-2A
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
LTC1196, V
REF
= 2.5.000V
LTC1198, V
CC
= 2.700V
LTC1196
(Note 5)
l
LTC1196-1B/LTC1196-2B
LTC1198-1B/LTC1198-2B
MIN
8
TYP
MAX
±1
±1
±1
±1
UNITS
Bits
LSB
LSB
LSB
LSB
V
±1
μA
CONDITIONS
l
l
MIN
8
TYP
MAX
±1/2
±1/2
±1/2
±1/2
(Note 3)
l
l
l
–0.05V to V
CC
+ 0.05V
±1
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
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