Datasheet

LTC2389-18
9
238918f
Integral Nonlinearity vs Output Code
Differential Nonlinearity
vs Output Code
DC Histogram (Near Zero-Scale)
Typical perFormance characTerisTics
T
A
= 25°C, V
DD
= 5V, OV
DD
= 2.5V, V
REF
= 4.096V
External Reference, Pseudo-Differential Unipolar Range (PD/FD = OV
DD
, OB/2C = OV
DD
), f
SMPL
= 2.5Msps, unless otherwise noted.
DC Histogram (Near Full-Scale)
32k Point FFT f
SMPL
= 2.5Msps,
f
IN
= 2kHz SNR, SINAD vs Input Frequency
THD, Harmonics vs Input Frequency
SNR, SINAD vs Input Level,
f
IN
= 2kHz
SNR, SINAD vs Temperature,
f
IN
= 2kHz
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 G19
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 G20
INTERNAL REF
EXTERNAL REF
FREQUENCY (kHz)
0
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
500250 750 1000 1250
–160
–180
–120
0
–140
238918 G23
SNR = 94.6dB
THD = –112dB
SINAD = 94.5dB
SFDR = 113dB
CODE
10 11 13 14 16 17 19 20 22 23
0
COUNTS
20000
40000
60000
80000
12
15 18 21
238918 G21
CODE
262123 262129 262135
COUNTS
20000
0
40000
60000
80000
262120
262126 262132
238918 G22
–40 –30 –20 0
–10
INPUT LEVEL (dB)
SNR, SINAD (dB)
94.5
95.5
94.0
93.5
95.0
238918 G26
SNR
SINAD
–55 –15
25
45 125
–35 5
65
85
105
TEMPERATURE (°C)
SNR, SINAD (dB)
94
97
92
93
91
96
95
238918 G27
SNR
SINAD
FREQUENCY (kHz)
0
80
SNR, SINAD (dB)
84
88
92
12.5
25
37.5 50 7562.5 87.5
96
98
82
86
90
94
100
238918 G24
SINAD
SNR
FREQUENCY (kHz)
0
–120
THD, HARMONICS (dB)
–110
–100
–90
12.5
25
37.5 50 7562.5 87.5
–80
–75
–115
–105
–95
–85
100
238918 G25
THD
2ND
3RD