MAX11329–MAX11332
3Msps, 12-/10-Bit, 8-/16-Channel ADCs with
Post-Mux External Signal Conditioning Access
Typical Operating Characteristics (continued)
(MAX11331ATI+/MAX11332ATI+, T = +25°C, unless otherwise noted.)
A
SNR vs. INPUT RESISTANCE
SINAD vs. INPUT RESISTANCE
THD vs. INPUT RESISTANCE
73
72
71
70
73
72
71
70
-70
-75
-80
-85
-90
f
f
= 3Msps
f
f
= 3Msps
SAMPLE
SAMPLE
= 100kHz
IN
= 100kHz
IN
AOP SHORTED TO AIP
BUFFER BETWEEN AOP AND AIP
BUFFER BETWEEN AON AND AIN
AON SHORTED TO AIN
BUFFER BETWEEN AOP AND AIP
BUFFER BETWEEN AON AND AIN
AOP SHORTED TO AIP
AON SHORTED TO AIN
BUFFER BETWEEN AOP AND AIP
BUFFER BETWEEN AON AND AIN
AOP SHORTED TO AIP
AON SHORTED TO AIN
f
f
= 3Msps
SAMPLE
= 100kHz
IN
0
1000
2000
3000
4000
5000
0
1000
2000
R
3000
4000
5000
0
1000
2000
R
3000
4000
5000
500
1500
2500
3500
4500
500
1500
2500
3500
4500
500
1500
2500
3500
4500
R
(I)
(I)
(I)
IN
IN
IN
100kHz SINE-WAVE INPUT
(8192 POINT FFT PLOT)
REFERENCE CURRENT
vs. SAMPLING RATE
SFDR vs. INPUT RESISTANCE
90
85
80
75
70
0
-20
200
150
100
50
f
f
= 3Msps
f
= 3Msps
= 100kHz
SAMPLE
SAMPLE
= 100kHz
f
IN
IN
BUFFER BETWEEN AOP AND AIP
BUFFER BETWEEN AON AND AIN
-40
A
= -88.93dB
HD2
f = 200kHz
-60
A
= -88.23dB
HD3
f = 300kHz
-80
AOP SHORTED TO AIP
AON SHORTED TO AIN
-100
-120
0
0
1000
2000
R
3000
4000
5000
0
300
600
900
1200
1500
0
500 1000 1500 2000 2500 3000
(ksps)
500
1500
2500
3500
4500
150
450
750
1050
1200
f
SAMPLE
(I)
IN
FREQUENCY (kHz)
SNR vs. REFERENCE VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
73
6.0
5.5
5.0
4.5
4.0
3.5
3.0
f
f
= 3Msps
SAMPLE
= 100kHz
IN
f = 3Msps
SAMPLE
= 3V
V
DD
72
71
70
69
68
67
66
1.0
1.4
1.8
2.2
2.6
(V)
3.0
3.4
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V
REFP
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