LTC1867_15 Datasheet, PDF (6/18 Pages) Linear Technology – 12-/16-Bit, 8-Channel 200ksps ADCs

LTC1863/LTC1867
TYPICAL PERFORMANCE CHARACTERISTICS
(LTC1867)
Integral Nonlinearity vs
Output Code
2.0
Differential Nonlinearity vs
Output Code
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0
0
– 0.5
–0.5
– 1.0
–1.0
– 1.5
–1.5
– 2.0
0
16384 32768 49152
OUTPUT CODE
65536
18637 GO1
–2.0
0
16384 32768 49152
OUTPUT CODE
65536
18637 GO2
4096 Points FFT Plot (f_IN = 1kHz)
0
SNR = 88.8dB
–20
SINAD = 87.9dB
THD = 95dB
f_SAMPLE = 200ksps
–40
INTERNAL REFERENCE
–60
–80
–100
–120
–140
0
25
50
75
FREQUENCY (kHz)
100
18637 G04
4096 Points FFT Plot (f_IN = 1kHz,
REFCOMP = External 5V)
0
SNR = 90dB
–20
SINAD = 88.5dB
THD = 94dB
f_SAMPLE = 200ksps
–40
V_REF = 0V
REFCOMP = EXT 5V
–60
–80
–100
–120
–140
0
25
50
75
FREQUENCY (kHz)
100
18637 G05
Signal-to-Noise Ratio vs
Frequency
100
90
80
70
60
50
40
30
20
1
10
INPUT FREQUENCY (kHz)
100
18637 G07
Signal-to-(Noise + Distortion) vs
Input Frequency
100
90
80
70
60
50
40
30
20
1
10
INPUT FREQUENCY (kHz)
100
18637 G08
Histogram for 4096 Conversions
2500
2152
2000
1500
1000
935
579
500
276
0 ^{1 26}
–4 –3 –2 –1 0
122
50
12 34
CODE
18637 GO3
Crosstalk vs Input Frequency
–80
–90
–100
–110
ADJACENT PAIR
–120
–130
NONADJACENT PAIR
–140
1
10
100
1000
ACTIVE CHANNEL INPUT FREQUENCY (kHz)
18637 G06
Total Harmonic Distortion vs
Input Frequency
–20
–30
–40
–50
–60
–70
–80
–90
–100
1
10
INPUT FREQUENCY (kHz)
100
18637 G09
18637fc
6
For more information www.linear.com/LTC1863