Datasheet

LTC2368-18
6
236818f
TYPICAL PERFORMANCE CHARACTERISTICS
32k Point FFT f
S
= 1Msps,
f
IN
= 2kHz SNR, SINAD vs Input Frequency
THD, Harmonics
vs Input Frequency
SNR, SINAD vs Input level,
f
IN
= 2kHz
SNR, SINAD vs Reference
Voltage, f
IN
= 2kHz
THD, Harmonics vs Reference
Voltage, f
IN
= 2kHz
Integral Nonlinearity
vs Output Code
Differential Nonlinearity
vs Output Code DC Histogram
T
A
= 25°C, V
DD
= 2.5V, OV
DD
= 2.5V, REF = 5V,
f
SMPL
= 1Msps, unless otherwise noted.
OUTPUT CODE
0 65536 131072 196608 262144
–2.0
INL ERROR (LSB)
0.0
0.5
1.0
1.5
–0.5
–1.0
–1.5
2.0
236818 G01
OUTPUT CODE
–0.5
DNL ERROR (LSB)
0.4
0.3
0.2
0.1
0.0
–0.4
–0.3
–0.2
–0.1
0.5
236818 G02
0 65536 131072 196608 262144
FREQUENCY (kHz)
0 100 200 300 400 500
–180
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
236818 G04
SNR = 97.2dB
THD = –120dB
SINAD = 97.1dB
SFDR = 120dB
FREQUENCY (kHz)
0
70
SNR, SINAD (dBFS)
75
80
85
90
50 100
150
200
236818 G05
95
100
SNR
25 75
125
175
SINAD
FREQUENCY (kHz)
0
–160
HARMONICS, THD (dBFS)
–150
–130
–120
–110
–60
THD
2ND
3RD
–90
50
100
125
236818 G06
–140
–80
–70
–100
25 75
150
175
200
INPUT LEVEL (dB)
–40
95.0
SNR, SINAD (dBFS)
95.5
96.0
96.5
97.0
97.5
SNR
SINAD
98.0
–30 –20 –10 0
236818 G07
REFERENCE VOLTAGE (V)
2.5
95
96
98
97
SNR
SINAD
4.5
236818 G08
94
93
3 3.5 4 5
92
91
90
SNR, SINAD (dBFS)
REFERENCE VOLTAGE (V)
2.5
HARMONICS, THD (dBFS)
–120
–110
THD
3RD
–100
4.5
236818 G09
–130
–140
–125
–115
–105
–135
–145
–150
3
3.5
4
5
2ND
CODE
COUNTS
25000
30000
35000
236818 G03
15000
0
131067 131069 131071 131073 131075 131077
40000
σ = 1.3
20000
10000
5000