MAX1276 Datasheet, PDF (6/18 Pages) Maxim Integrated Products – 1.8Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs with Internal Reference

1.8Msps, Single-Supply, Low-Power, True-
Differential, 12-Bit ADCs with Internal Reference
Typical Operating Characteristics (continued)
(V_DD = +5V, V_L = V_DD, f_SCLK = 28.8MHz, f_SAMPLE = 1.8Msps, T_A = T_MIN to T_MAX, unless otherwise noted. Typical values are meas-
ured at T_A = +25°C)
DYNAMIC PERFORMANCE
vs. INPUT FREQUENCY (MAX1278)
72.00
THD vs. INPUT FREQUENCY
-86
71.75
SNR
71.50
71.25
SINAD
71.00
100
200
300
400
500
ANALOG INPUT FREQUENCY (kHz)
-88
MAX1276
-90
MAX1278
-92
-94
-96
100
200
300
400
500
ANALOG INPUT FREQUENCY (kHz)
SFDR vs. INPUT FREQUENCY
95
93
MAX1276
91
89
87
MAX1278
85
100
200
300
400
500
ANALOG INPUT FREQUENCY (kHz)
FFT PLOT (MAX1276)
0
f_IN = 500kHz
-20
SINAD = 71.0dB
SNR = 71.1dB
THD = -87.1dB
-40 _{SFDR = 90.2dB}
-60
-80
-100
-120
-140
0
150 300 450 600 750 900
ANALOG INPUT FREQUENCY (kHz)
FFT PLOT (MAX1278)
0
f_IN = 500kHz
-20
SINAD = 71.2dB
SNR = 71.3dB
THD = -95.5dB
-40 _{SFDR = 90.5dB}
-60
-80
-100
-120
-140
0
150 300 450 600 750 900
ANALOG INPUT FREQUENCY (kHz)
TOTAL HARMONIC DISTORTION
vs. SOURCE IMPEDANCE
-50
-60
f_IN = 500kHz
-70
-80
-90
-100
10
f_IN = 100kHz
100
1000
SOURCE IMPEDANCE (Ω)
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