Техническая Спецификация для Linear Technology LTC2378-20, 20-Bit, 1Msps, SAR ADC with 104dB SNR. Req DC590 or DC890 DC1925A-A DC1925A-A
Модели
DC1925A-A
LTC2378-20
6
237820f
FREQUENCY (kHz)
SNR, SINAD (dBFS)
108
237820 G05
92
94
96
98
100
102
106
104
0
25
50
75
150
125
100
175 200
SNR
SINAD
FREQUENCY (kHz)
HARMONICS, THD (dBFS)
–90
237820 G06
–140
–120
–130
–110
–100
–125
–135
–115
–105
–95
0
25
50
100
75
150
125
175 200
3RD
2ND
THD
Typical perForMance characTerisTics
128k Point FFT f
S
= 1Msps,
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
262144
524288
786432
1048576
–2.0
INL ERROR (ppm)
0.5
1.0
1.5
0
–0.5
–1.0
–1.5
2.0
237820 G01
FREQUENCY (kHz)
0
100
200
300
500
400
–180
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237820 G04
SNR = 104dB
THD = –128dB
SINAD = 104dB
SFDR = 132dB
OUTPUT CODE
–0.5
DNL ERROR (ppm)
0.4
0.3
0.2
0.1
0.0
–0.4
–0.3
–0.2
–0.1
0.5
237820 G02
0
262144
524288
786432
1048576
OUTPUT CODE
524295
524291
524287
524283
524279
0
COUNTS 20000
10000
5000
45000
30000
25000
15000
35000
40000
50000
237820 G03
σ = 2.3
T
A
= 25°C, V
DD
= 2.5V, OV
DD
= 2.5V, V
CM
= 2.5V,
REF = 5V, f
SMPL
= 1Msps, unless otherwise noted.
INPUT LEVEL (dB)
SNR, SINAD (dBFS)
105.0
237820 G07
103.0
103.5
104.0
104.5
–40
–30
–20
–10
0
SNR
SINAD
REFERENCE VOLTAGE (V)
SNR, SINAD (dBFS)
105
104
103
102
237820 G08
95
96
97
98
99
100
101
2.5
3.0
3.5
4.0
4.5
5.0
SINAD
SNR
HARMONICS, THD (dBFS)
–110
237820 G09
–140
–135
–130
–125
–120
–115
3RD
REFERENCE VOLTAGE (V)
2.5
3.0
3.5
4.0
4.5
5.0
2ND
THD