LTC2378-18
6
237818f
TYPICAL PERFORMANCE CHARACTERISTICS
32k Point FFT fS = 1Msps,
fIN = 2kHz
SNR, SINAD vs Input Frequency
THD, Harmonics
vs Input Frequency
SNR, SINAD vs Input level,
fIN = 2kHz
SNR, SINAD vs Reference
Voltage, fIN = 2kHz
THD, Harmonics vs Reference
Voltage, fIN = 2kHz
Integral Nonlinearity
vs Output Code
Differential Nonlinearity
vs Output Code
DC Histogram
OUTPUT CODE
0
65536
131072
196608
262144
–1.5
INL
ERROR
(LSB)
0.0
0.5
1.0
–0.5
–1.0
1.5
237818 G01
FREQUENCY (kHz)
0
100
200
300
500
400
–180
AMPLITUDE
(dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237818 G04
SNR = 102.3dB
THD = –124dB
SINAD = 102.2dB
SFDR = 126dB
OUTPUT CODE
–1.5
DNL
ERROR
(LSB)
0.4
0.3
0.2
0.1
0.0
–0.4
–0.3
–0.2
–0.1
0.5
237818 G02
0
65536
131072
196608
262144
CODE
131074
131073
131072
131071
131070
131069
0
COUNTS
20000
10000
70000
50000
30000
60000
40000
80000
237818 G03
σ = 0.7
TA = 25°C, VDD = 2.5V, OVDD = 2.5V, VCM = 2.5V,
REF = 5V, fSMPL = 1Msps, unless otherwise noted.
INPUT LEVEL (dB)
SNR,
SINAD
(dBFS)
103.0
237818 G07
101.0
101.5
102.0
102.5
–40
–30
–20
–10
0
SNR
SINAD
REFERENCE VOLTAGE (V)
SNR,
SINAD
(dBFS)
103
102
237818 G08
97
98
99
100
101
2.5
3.0
3.5
4.0
4.5
5.0
SINAD
SNR
HARMONICS,
THD
(dBFS)
–100
237818 G09
–150
–145
–140
–135
–130
–125
–120
–115
–110
–105
3RD
REFERENCE VOLTAGE (V)
2.5
3.0
3.5
4.0
4.5
5.0
2ND
THD
FREQUENCY (kHz)
SNR,
SINAD
(dBFS)
103
102
237818 G05
93
95
94
98
97
96
101
100
99
0
255075
150
125
100
175 200
SNR
SINAD
FREQUENCY (kHz)
HARMONICS,
THD
(dBFS)
–80
237818 G06
–140
–120
–130
–110
–100
–90
0
25
50
100
75
150
125
175 200
3RD
2ND
THD