Datasheet

5
LTC1418
TYPICAL PERFORMANCE CHARACTERISTICS
UW
FREQUENCY (kHz)
0
–120
AMPLITUDE (dB)
–100
–80
–60
–40
20 50
70
100
1418 G05
–20
0
10 30 40
60
80 90
f
SAMPLE
= 200kHz
f
IN1
= 97.65625kHz
f
IN2
= 104.248046kHz
Intermodulation Distortion Plot
FREQUENCY (kHz)
01030507090
AMPLITUDE (dB)
0
–20
–40
–60
–80
–100
–120
20 40 60 80
1418 F02a
100
f
SAMPLE
= 200kHz
f
IN
= 9.9609375kHz
SFDR = 99.32
SINAD = 82.4
Nonaveraged, 4096 Point FFT,
Input Frequency = 10kHz
INPUT FREQUENCY (Hz)
10k
SPURIOUS-FREE DYNAMIC RANGE (dB)
100k 1M
1418 G04
0
–20
–40
–60
–80
–100
–120
S/(N + D) vs Input Frequency
and Amplitude
INPUT FREQUENCY (Hz)
SIGNAL/(NOISE + DISTORTION) (dB)
90
80
70
60
50
40
30
20
10
0
1k 100k 1M
1418 G01
10k
V
IN
= –60dB
V
IN
= 0dB
V
IN
= –20dB
FREQUENCY (kHz)
01030507090
AMPLITUDE (dB)
0
–20
–40
–60
–80
–100
–120
20 40 60 80
1418 F02b
100
f
SAMPLE
= 200kHz
f
IN
= 97.509765kHz
SFDR = 94.29
SINAD = 81.4
Nonaveraged, 4096 Point FFT,
Input Frequency = 100kHz
Typical INL Curve
OUTPUT CODE
40960
–1.0
INL (LSBs)
–0.5
0
0.5
1.0
8192
1418 TA02
12288 16384
OUTPUT CODE
0
–1.0
DNL ERROR (LSBs)
–0.5
0
0.5
1.0
4096 8192
1418 G06
12288 16384
Differential Nonlinearity
vs Output Code
INPUT FREQUENCY (Hz)
AMPLITUDE (dB BELOW THE FUNDAMENTAL)
0
–20
–40
–60
–80
–100
–120
1418 G03
1k 100k 1M10k
THD
2ND
3RD
Distortion vs Input Frequency
Spurious-Free Dynamic Range
vs Input Frequency
Signal-to-Noise Ratio
vs Input Frequency
INPUT FREQUENCY (Hz)
SIGNAL-TO -NOISE RATIO (dB)
1k
0
90
80
70
60
50
40
30
20
10
1418 G02
100k 1M10k