![](http://datasheet.mmic.net.cn/Linear-Technology/LTC2377IMS-18-PBF_datasheet_105416/LTC2377IMS-18-PBF_6.png)
LTC2377-18
6
237718f
TYPICAL PERFORMANCE CHARACTERISTICS
32k Point FFT fS = 500ksps,
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
237718 G01
FREQUENCY (kHz)
0
50
100
150
250
200
–180
AMPLITUDE
(dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237718 G04
SNR = 102.3dB
THD = –124dB
SINAD = 102.2dB
SFDR = 125dB
SNR = 102.3dB
THD = –124dB
SINAD = 102.2dB
SFDR = 125dB
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
237718 G02
0
65536
131072
196608
262144
CODE
131074
131073
131072
131071
131070
131069
0
COUNTS
20000
10000
70000
50000
30000
60000
40000
80000
σ = 0.7
237718 G03
TA = 25°C, VDD = 2.5V, OVDD = 2.5V, VCM = 2.5V,
REF = 5V, fSMPL = 500ksps, unless otherwise noted.
INPUT LEVEL (dB)
SNR,
SINAD
(dBFS)
103.0
237718 G07
101.0
101.5
102.0
102.5
–40
–30
–20
–10
0
SNR
SINAD
REFERENCE VOLTAGE (V)
SNR,
SINAD
(dBFS)
103
102
237718 G08
97
98
99
100
101
2.5
3.0
3.5
4.0
4.5
5.0
SINAD
SNR
HARMONICS,
THD
(dBFS)
–100
–110
237718 G09
–150
–140
–145
–135
–130
–125
–120
–115
–105
THD
3RD
REFERENCE VOLTAGE (V)
2.5
3.0
3.5
4.0
4.5
5.0
2ND
FREQUENCY (kHz)
SNR,
SINAD
(dBFS)
103
102
237718 G05
93
95
94
98
97
96
101
100
99
025
75
50
125
100
175
150
200
SNR
SINAD
FREQUENCY (kHz)
HARMONICS,
THD
(dBFS)
–80
–90
237718 G06
–140
–130
–120
–110
–100
0
25
50
75
100 125 150 175 200
3RD
2ND
THD