Datasheet
LTC2389-18
7
238918f
DC Histogram (Near Full-Scale)
Internal Reference Output
vs Temperature
32k Point FFT f
SMPL
= 2.5Msps,
f
IN
= 2kHz
SNR, SINAD vs Input Frequency
Integral Nonlinearity
vs Output Code
Differential Nonlinearity
vs Output Code DC Histogram (Zero-Scale)
THD, Harmonics vs Input Frequency
SNR, SINAD vs Input Level,
f
IN
= 2kHz
Typical perFormance characTerisTics
T
A
= 25°C, V
DD
= 5V, OV
DD
= 2.5V, V
REF
= 4.096V
External Reference, Fully Differential Range (PD/FD = 0V), V
CM
= 2.048V, f
SMPL
= 2.5Msps, unless otherwise noted.
OUTPUT CODE
0
INL ERROR (LSB)
0.5
1.0
1.5
0
–0.5
13107265536 196608 262144
–2.0
–1.0
2.0
–1.5
238918 G01
INTERNAL REF
EXTERNAL REF
OUTPUT CODE
0
DNL ERROR (LSB)
0.2
0.4
0.6
0.8
0
–0.2
13107265536 196608 262144
–0.8
–1.0
–0.4
1.0
–0.6
238918 G02
INTERNAL REF
EXTERNAL REF
FREQUENCY (kHz)
0
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
500250 750 1000 1250
–160
–180
–120
0
–140
238918 G06
SNR = 99.8dB
THD = –116dB
SINAD = 99.7dB
SFDR = 117dB
CODE
–3 –2 0 1 3
COUNTS
20000
0
40000
60000
80000
100000
120000
–4
–1 2
238918 G03
CODE
COUNTS
238918 G04
20000
0
40000
60000
80000
100000
120000
131052 131054 131056 131058 131060
–40 –30 –20 0
–10
INPUT LEVEL (dB)
SNR, SINAD (dB)
100.0
101.0
99.5
99.0
100.5
238918 G09
SNR
SINAD
–55 –15
25
45 125
–35 5
65
85
105
TEMPERATURE (°C)
REFERENCE OUTPUT (V)
4.093
4.097
4.091
4.096
4.092
4.090
4.089
4.095
4.094
238918 G05
T
C
= 8ppm/°C
FREQUENCY (kHz)
0
91
SNR, SINAD (dB)
93
95
97
12.5
25
37.5 50 7562.5 87.5
99
101
92
94
96
98
100
100
238918 G07
SINAD
SNR
FREQUENCY (kHz)
0
–130
THD, HARMONICS (dB)
–120
–110
–100
12.5
25
37.5 50 7562.5 87.5
–90
–85
–125
–115
–105
–95
100
238918 G08
THD
2ND
3RD