Datasheet

LTC2377-18
6
237718f
TYPICAL PERFORMANCE CHARACTERISTICS
32k Point FFT f
S
= 500ksps,
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
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 250200
–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 = 102.3d
B
THD = –124d
B
SINAD = 102.2d
B
S
FDR = 125d
B
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
131074131073131072131071131070131069
0
COUNTS
20000
10000
70000
50000
30000
60000
40000
80000
σ = 0.7
237718 G03
T
A
= 25°C, V
DD
= 2.5V, OV
DD
= 2.5V, V
CM
= 2.5V,
REF = 5V, f
SMPL
= 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 7550 125100 175150 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