LTC1197/LTC1197L
LTC1199/LTC1199L
10-Bit, 500ksps ADCs in
MSOP with Auto Shutdown
FEATURES
s
s
s
s
DESCRIPTIO
s
s
s
s
8-Pin MSOP and SO Packages
10-Bit Resolution at 500ksps
Single Supply: 5V or 3V
Low Power at Full Speed:
25mW Typ at 5V
2.2mW Typ at 2.7V
Auto Shutdown Reduces Power Linearly
at Lower Sample Rates
10-Bit Upgrade to 8-Bit LTC1196/LTC1198
SPI and MICROWIRE
TM
Compatible Serial I/O
Low Cost
The LTC
®
1197/LTC1197L/LTC1199/LTC1199L are
10-bit A/D converters with sampling rates up to 500kHz.
They have 2.7V (L) and 5V versions and are offered in
8-pin MSOP and SO packages. Power dissipation is typi-
cally only 2.2mW at 2.7V (25mW at 5V) during full speed
operation. The automatic power down reduces supply
current linearly as sample rate is reduced. These 10-bit,
switched-capacitor, successive approximation ADCs in-
clude a sample-and-hold. The LTC1197/LTC1197L have a
differential analog input with an adjustable reference pin.
The LTC1199/LTC1199L offer a software-selectable
2-channel MUX.
The 3-wire serial I/O, MSOP and SO-8 packages, 2.7V
operation and extremely high sample rate-to-power ratio
make these ADCs ideal choices for compact, low power
high speed systems.
These circuits can be used in ratiometric applications or
with external references. The high impedance analog
inputs and the ability to operate with reduced spans below
1V full scale (LTC1197/LTC1197L) allow direct connec-
tion to signal sources in many applications, eliminating
the need for gain stages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
APPLICATI
s
s
s
S
High Speed Data Acquisition
Portable or Compact Instrumentation
Low Power or Battery-Operated Instrumentation
TYPICAL APPLICATI
1µF
Supply Current vs Sampling Frequency
Single 2.7V Supply, 250ksps, 10-Bit Sampling ADC
2.7V
10000
1000
SUPPLY CURRENT (µA)
100
LTC1197L
1
2
ANALOG INPUT
0V TO 2.7V RANGE 3
4
CS
+IN
– IN
GND
V
CC
CLK
D
OUT
V
REF
8
7
6
5
1197/99 TA01
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
10
V
CC
= 2.7V
f
CLK
= 3.5MHz
1
0.1
0.01
0.1
10
100
1
SAMPLING FREQUENCY (kHz)
U
V
CC
= 5V
f
CLK
= 7.2MHz
1000
1197/99 G03
UO
UO
1
LTC1197/LTC1197L
LTC1199/LTC1199L
ABSOLUTE
AXI U
RATI GS
Supply Voltage (V
CC
) ............................................... 12V
Voltage
Analog Input ..................... GND – 0.3V to V
CC
+ 0.3V
Digital Input ................................ GND – 0.3V to 12V
Digital Output .................... GND – 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
+IN
–IN
GND
1
2
3
4
8
7
6
5
V
CC
CLK
D
OUT
V
REF
ORDER PART
NUMBER
LTC1197LCMS8
CS 1
+IN 2
– IN 3
GND 4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 210°C/W
MS8 PART MARKING
LTBL
ORDER PART
NUMBER
TOP VIEW
CS
CH0
CH1
GND
1
2
3
4
8
7
6
5
V
CC
CLK
D
OUT
D
IN
LTC1199LCMS8
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 210°C/W
MS8 PART MARKING
LTCM
Consult factory for Military grade parts.
RECO
V
CC
f
CLK
t
CYC
t
SMPL
t
hCS
E DED OPERATI G CO DITIO S
CONDITIONS
MIN
4
q
SYMBOL PARAMETER
Supply Voltage
Clock Frequency
Total Cycle Time
Analog Input Sampling Time
Hold Time CS Low After Last CLK↑
V
CC
= 5V Operation
2
U
U
U
U
U
W
W W
U
W
(Notes 1, 2)
Operating Temperature Range
LTC1197C/LTC1197LC
LTC1199C/LTC1199LC ........................... 0°C to 70°C
LTC1197I/LTC1197LI
LTC1199I/LTC1199LI ........................ – 45°C to 85°C
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
8 V
CC
7 CLK
6 D
OUT
5 V
REF
ORDER PART
NUMBER
LTC1197CS8
LTC1197IS8
LTC1197LCS8
LTC1197LIS8
S8 PART MARKING
1197
1197I
1197L
1197LI
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 175°C/W
TOP VIEW
CS 1
CH0 2
CH1 3
GND 4
8 V
CC
7 CLK
6 D
OUT
5 D
IN
ORDER PART
NUMBER
LTC1199CS8
LTC1199IS8
LTC1199LCS8
LTC1199LIS8
S8 PART MARKING
1199
1199I
1199L
1199LI
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 175°C/W
U WW
LTC1197
TYP
MAX
9
7.2
MIN
4
0.05
16
1.5
13
LTC1199
TYP
MAX
6
7.2
UNITS
V
MHz
CLK
CLK
ns
0.05
14
1.5
13
LTC1197/LTC1197L
LTC1199/LTC1199L
RECO
E DED OPERATI G CO DITIO S
CONDITIONS
LTC1197
MIN
TYP
MAX
26
LTC1199
LTC1199
f
CLK
= f
CLK(MAX)
f
CLK
= f
CLK(MAX)
40%
40%
32
13
LTC1199
MIN
TYP
MAX
26
26
26
40%
40%
32
15
UNITS
ns
ns
ns
1/f
CLK
1/f
CLK
ns
CLK
SYMBOL PARAMETER
V
CC
= 5V Operation
t
suCS
t
hDI
t
suDI
t
WHCLK
t
WLCLK
t
WHCS
t
WLCS
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
SYMBOL PARAMETER
V
CC
f
CLK
t
CYC
t
SMPL
t
hCS
t
suCS
t
hDI
t
suDI
t
WHCLK
t
WLCLK
t
WHCS
t
WLCS
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
V
CC
= 2.7V Operation
CONDITIONS
q
LTC1199L
LTC1199L
f
CLK
= f
CLK(MAX)
f
CLK
= f
CLK(MAX)
40%
40%
96
13
CONVERTER AND
MULTIPLEXER
CHARACTERISTICS
V
CC
= 5V, V
REF
= 5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
PARAMETER
Offset Error
Linearity Error
Gain Error
No Missing Codes Resolution
Analog Input Range
Reference Input Range
Analog Input Leakage Current
LTC1197, V
CC
≤
6V
LTC1197, V
CC
> 6V
(Note 4)
q
CONDITIONS
q
(Note 3)
q
q
q
U
U
U
W U
U WW
LTC1197L
MIN
TYP
MAX
2.7
0.01
14
1.5
40
78
4
3.5
LTC1199L
MIN
TYP
MAX
2.7
0.01
16
1.5
40
78
78
78
40%
40%
96
15
4
3.5
UNITS
V
MHz
CLK
CLK
ns
ns
ns
ns
1/f
CLK
1/f
CLK
ns
CLK
U
MIN
LTC1197
TYP
MAX
±2
±1
±4
MIN
LTC1199
TYP
MAX
±2
±1
±4
UNITS
LSB
LSB
LSB
Bits
V
V
V
10
0.2
0.2
V
CC
+ 0.05V
6
±1
10
– 0.05V to V
CC
+ 0.05V
±1
µA
3
LTC1197/LTC1197L
LTC1199/LTC1199L
CONVERTER AND
MULTIPLEXER
CHARACTERISTICS
V
CC
= 2.7V, V
REF
= 2.5V (LTC1197L), f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
PARAMETER
Offset Error
Linearity Error
Gain Error
No Missing Codes Resolution
Analog Input Range
Reference Input Range
Analog Input Leakage Current
LTC1197L
(Note 4)
q
DYNAMIC ACCURACY
V
CC
= 5V, V
REF
= 5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
100kHz Input Signal
100kHz Input Signal
100kHz Input Signal
f
IN1
= 97.046kHz, f
IN2
= 102.905kHz
2nd Order Terms
3rd Order Terms
MIN
LTC1197
TYP
MAX
60
– 64
– 68
– 65
– 70
MIN
LTC1199
TYP
MAX
60
– 64
– 68
– 65
– 70
UNITS
dB
dB
dB
dB
dB
S/(N + D) Signal-to-Noise Plus
Distortion Ratio
THD
Total Harmonic Distortion
First 5 Harmonics
Peak Harmonic or Spurious Noise
IMD
Intermodulation Distortion
V
CC
= 2.7V, V
REF
= 2.5V, f
CLK
= f
CLK(MAX)
as defined in Recommended Operating Conditions, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
50kHz Input Signal
50kHz Input Signal
50kHz Input Signal
f
IN1
= 48.5kHz, f
IN2
= 51.5kHz
2nd Order Terms
3rd Order Terms
LTC1197L
MIN
TYP
MAX
58
– 60
– 63
– 60
– 65
LTC1199L
MIN
TYP
MAX
58
– 60
– 63
– 60
– 65
UNITS
dB
dB
dB
dB
dB
S/(N + D) Signal-to-Noise Plus
Distortion Ratio
THD
Total Harmonic Distortion
First 5 Harmonics
Peak Harmonic or Spurious Noise
IMD
Intermodulation Distortion
4
W U
W U
U
CONDITIONS
q
MIN
q
q
q
LTC1197L
TYP
MAX
±2
±1
±4
MIN
LTC1199L
TYP
MAX
±2
±1
±4
UNITS
LSB
LSB
LSB
Bits
V
V
(Note 3)
10
0.2
V
CC
+ 0.05V
±1
10
– 0.05V to V
CC
+ 0.05V
±1
µA
LTC1197/LTC1197L
LTC1199/LTC1199L
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
V
CC
= 5V, V
REF
= 5V, unless otherwise noted.
SYMBOL PARAMETER
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OZ
I
SOURCE
I
SINK
I
REF
I
CC
P
D
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 (LTC1197)
Supply Current
Power Dissipation
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 = High
V
OUT
= 0V
V
OUT
= V
CC
CS = V
CC
f
SMPL
= f
SMPL(MAX)
CS = V
CC
f
SMPL
= f
SMPL(MAX)
f
SMPL
= f
SMPL(MAX)
q
q
q
q
q
q
q
q
q
q
q
q
V
CC
= 2.7V, V
REF
= 2.5V, unless otherwise noted.
SYMBOL PARAMETER
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
I
OZ
I
SOURCE
I
SINK
I
REF
I
CC
P
D
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 (LTC1197L)
Supply Current
Power Dissipation
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
V
OUT
= 0V
V
OUT
= V
CC
CS = V
CC
f
SMPL
= f
SMPL(MAX)
CS = V
CC
f
SMPL
= f
SMPL(MAX)
f
SMPL
= f
SMPL(MAX)
q
q
q
q
q
q
q
q
q
q
q
q
U
MIN
2.4
LTC1197
TYP
MAX
0.8
2.5
– 2.5
MIN
2.4
LTC1199
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
– 25
45
0.001
0.5
0.001
4.5
22.5
3
1
3
8
4.5
2.4
4.74
4.72
0.4
±3
– 25
45
V
µA
mA
mA
µA
mA
0.001
5
25
3
8.5
µA
mA
mW
LTC1197L
MIN
TYP
MAX
1.9
0.45
2.5
– 2.5
2.3
2.1
2.60
2.45
0.3
±3
– 6.5
11
0.001
0.250
0.001
0.8
2.2
3.0
0.5
3
2
LTC1199L
MIN
TYP
MAX
1.9
0.45
2.5
– 2.5
2.3
2.1
2.60
2.45
0.3
±3
– 6.5
11
UNITS
V
V
µA
µA
V
V
V
µA
mA
mA
µA
mA
0.001
0.8
2.2
3
2
µA
mA
mW
5
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