Datasheet

6
LTC1286/LTC1298
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
INPUT FREQUENCY (Hz)
1 10k
100
ATTENUATION (%)
80
90
60
70
40
50
20
30
100k 1M 10M
LTC 1286/98 G26
0
10
T
A
= 25°C
V
CC
= V
REF
= 5V
f
SMPL
= 12.5kHz
Attenuation vs
Input Frequency
Spurious Free Dynamic Range
vs Frequency
S/(N+D) vs Input Level
INPUT FREQUENCY (Hz)
1k
40
SPURIOUS FREE DYNAMIC RANGE (dB)
50
60
70
80
10k 100k 1M
LTC 1286/98 G27
30
20
10
0
90
100
T
A
= 25°C
V
CC
= V
REF
= 5V
f
SMPL
= 12.5kHz
INPUT LEVEL (dB)
–40
0
SIGNAL-TO-NOISE PLUS DISTORTION (dB)
20
10
40
30
60
50
80
70
–30 –20
LT1286/98 G25
–10 0
T
A
= 25°C
V
CC
= V
REF
= 5V
f
IN
= 1kHz
f
SMPL
= 12.5kHz
4096 Point FFT Plot
Intermodulation Distortion
Power Supply Feedthrough
vs Ripple Frequency
FREQUENCY (kHz)
0
–60
–40
0
35
LTC 1286/98 G21
–80
–100
12
467
–120
–140
–20
MAGNITUDE (dB)
T
A
= 25°C
V
CC
= V
REF
= 5V
f
IN
= 5kHz
f
CLK
= 200kHz
f
SMPL
= 12.5kHz
FREQUENCY (kHz)
0
–60
–40
0
35
LTC 1286/98 G24
–80
–100
12
467
–120
–140
–20
MAGNITUDE (dB)
T
A
= 25°C
V
CC
= V
REF
= 5V
f
1
= 5kHz
f
2
= 6kHz
f
SMPL
= 12.5kHz
RIPPLE FREQUENCY (kHz)
FEEDTHROUGH (dB)
–50
0
1 100 1000 10000
LTC 1286/98 G22
–100
10
T
A
= 25°C
V
CC
= 5V (V
RIPPLE
= 20mV)
V
REF
= 5V
f
CLK
= 200kHz
Maximum Clock Frequency vs
Source Resistance
SOURCE RESISTANCE (kΩ)
0.1
0
CLOCK FREQUENCY (kHz)
50
100
150
200
300
110
LT1286/98 G12
250
+INPUT
–INPUT
R
SOURCE
–
V
IN
T
A
= 25°C
V
CC
= V
REF
= 5V
Sample and Hold Aquisition
Time vs Source Resistance
SOURCE RESISTANCE (Ω)
10 100 1000
LT1286/98 G16
10.1 10000
100
S&H ACQUISITION TIME (ns)
1000
10000
T
A
= 25°C
V
CC
= V
REF
= 5V
+INPUT
–INPUT
R
SOURCE
+
V
IN
SUPPLY VOLTAGE (V)
5
9
LT1286/98 G13
6
7
8
250
CLOCK FREQUENCY (kHz)
260
270
280
300
290
T
A
= 25°C
V
CC
= V
REF
= 5V
Maximum Clock Frequency vs
Supply Voltage