Datasheet

7
LTC1197/LTC1197L
LTC1199/LTC1199L
Supply Current
vs Sampling Frequency
Supply Current vs Clock Rate*
FREQUENCY (kHz)
10
8
SUPPLY CURRENT (mA)
10
12
14
16
100 1000 10000
1197/99 G01
6
4
2
0
18
20
V
CC
= 9V
V
CC
= 5V
V
CC
= 2.7V
SAMPLING FREQUENCY (kHz)
0.01
SUPPLY CURRENT (µA)
100
1000
10000
100
1197/99 G03
10
1
0.1
0.1
1
10
1000
V
CC
= 5V
f
CLK
= 7.2MHz
V
CC
= 2.7V
f
CLK
= 3.5MHz
Supply Current vs Supply Voltage
SUPPLY VOLTAGE (V)
10
SUPPLY CURRENT (mA)
SHUTDOWN CURRENT (nA)
8
10
12
56789
1197/99 G02
6
4
0
2
3
4
2
16
14
40
50
60
30
20
0
10
80
70
SHUTDOWN
MODE
ACTIVE
MODE
f
CLK
= 3.5MHz
T
A
= 25°C
CODE
0
–1.0
INL (LSBs)
–0.5
0
0.5
1.0
128 256 384 512
1197/99 G04
640 768 896 1024
V
CC
= V
REF
= 5V
f
CLK
= 7.2MHz
T
A
= 25°C
INL Plot
FREQUENCY (kHz)
0
AMPLITUDE (dB)
–40
–20
–30
–10
0
1197/99 G06
–60
–80
–50
–70
–90
–100
50
100 150 200 250
f
SMPL
= 500kHz
f
IN
= 97.045898kHz
LTC1197 4096 Point FFT
FREQUENCY (kHz)
1
4
ENOBs
5
6
7
8
10 100 1000
1197/99 G07
3
2
1
0
9
10
V
CC
= 2.7V
f
SMPL
= 250kHz
V
CC
= 5V
f
SMPL
= 500kHz
ENOBs vs Frequency Intermodulation Distortion Plot
*Part is continuously sampling, spending only a minimum amount of time in shutdown.
FREQUENCY (kHz)
0
AMPLITUDE (dB)
–20
–30
–40
–50
–60
–70
–80
–90
–100
–10
0
1197/99 G09
50
100 150 200 250
f
SMPL
= 500kHz
f
IN1
= 97.045898kHz
f
IN2
= 102.905273kHz
CODE
0
–1.0
DNL (LSBs)
–0.5
0
0.5
1.0
128 256 384 512
1197/99 G26
640 768 896 1024
V
CC
= V
REF
= 5V
f
CLK
= 7.2MHz
T
A
= 25°C
DNL Plot
THD vs Frequency
FREQUENCY (kHz)
10
THD (dB)
0
100 1000
1197/99 G08
–10
–20
–30
–40
–50
–60
–70
–80
T
A
= 25°C
V
CC
= 2.7V
f
SMPL
= 250kHz
V
CC
= 5V
f
SMPL
= 500kHz
TYPICAL PERFOR A CE CHARACTERISTICS
UW