LTC1403-1 Datasheet, PDF (6/20 Pages) Linear Technology – Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown

LTC1403-1/LTC1403A-1
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C, V_DD = 3V. Single ended A_IN+ signal drive
with A_IN– = 1.5V DC, differential signals drive both inputs with V_CM = 1.5V DC (LTC1403A-1)
1.4MHz Input Summed with
1.56MHz Input IMD 4096 Point FFT
Plot for Differential Input Signals
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
200k 400k 600k 800k 1M 1.2M 1.4M
FREQUENCY (Hz)
Differential Linearity
vs Output Code
14031 G07
1.0
0.8
0.6
0.4
0.2
1.3MHz Sine Wave 4096 Point
FFT Plot for Differential Input
Signals
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
350
700k 1.05M
FREQUENCY (Hz)
1.4M
14031 G21
Integral Linearity
vs Output Code
4
3
2
1
10.7MHz Sine Wave 4096 Point
FFT Plot for Differential Input
Signals
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
350
700k 1.05M
FREQUENCY (Hz)
1.4M
14031 G22
Integral Linearity vs Output Code
for Differential Input Signals
4
3
2
1
0
0
0
–0.2
–1
–1
–0.4
–2
–2
–0.6
–0.8
–3
–3
–1.0
0
4096
8192
12288
OUTPUT CODE
16384
14031 G08
–4
0
4096
8192 12288
OUTPUT CODE
16384
14071 G09
–4
0
4096
8192 12288
OUTPUT CODE
16384
14071 G23
Differential and Integral Linearity
vs Conversion Rate
8
18 CLOCKS PER CONVERSION
7
6
5
4
MAX INL
3
2
MAX DNL
1
0
MIN DNL
–1
–2
MIN INL
–3
–4
2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
CONVERSION RATE (Msps)
SINAD vs Conversion Rate
78
77
76
75
74
73
72
71
70
EXTERNAL V_REF = 3.3V f_IN ~ f_S/3
EXTERNAL V_REF = 3.3V f_IN ~ f_S/40
69
INTERNAL V_REF = 2.5V f_IN ~ f_S/3
INTERNAL V_REF = 2.5V f_IN ~ f_S/40
68
2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
CONVERSION RATE (Msps)
14031 G10
14031 G11
14031f
6