Datasheet

Typical Operating Characteristics (continued)
(V
DD
= +5V, V
L
= V
DD
, V
REF
= 4.096V, f
SCLK
= 28.8MHz, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are measured
at T
A
= +25°C)
MAX1274/MAX1275
1.8Msps, Single-Supply, Low-Power,
True-Differential, 12-Bit ADCs
6 _______________________________________________________________________________________
FFT PLOT (MAX1275)
MAX1274 toc10
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
800600400200
-120
-100
-80
-60
-40
-20
0
-140
0 1000
f
SAMPLE
= 2Msps
f
SCLK
= 32MHz
f
IN
= 100kHz
SINAD = 70.41dB
SNR = 70.53dB
THD = -85.92dB
SFDR = 87.56dB
FFT PLOT (MAX1274)
MAX1274 toc11
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
800600400200
-120
-100
-80
-60
-40
-20
0
-140
0 1000
f
SAMPLE
= 2Msps
f
SCLK
= 32MHz
f
IN
= 300kHz
SINAD = 70.88dB
SNR = 71.24dB
THD = -81.96dB
SFDR = 83.65dB
FFT PLOT (MAX1275)
MAX1274 toc12
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
800600400200
-120
-100
-80
-60
-40
-20
0
-140
0 1000
f
SAMPLE
= 2Msps
f
SCLK
= 32MHz
f
IN
= 300kHz
SINAD = 70.66dB
SNR = 71.09dB
THD = -80.85dB
SFDR = 81.26dB
FFT PLOT (MAX1274)
MAX1274 toc13
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
800600400200
-120
-100
-80
-60
-40
-20
0
-140
0 1000
f
SAMPLE
= 2Msps
f
SCLK
= 32MHz
f
IN
= 500kHz
SINAD = 70.84dB
SNR = 71.11dB
THD = -83.05dB
SFDR = 84.68dB
FFT PLOT (MAX1275)
MAX1274 toc14
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
800600400200
-120
-100
-80
-60
-40
-20
0
-140
0 1000
f
SAMPLE
= 2Msps
f
SCLK
= 32MHz
f
IN
= 500kHz
SINAD = 70.55dB
SNR = 70.73dB
THD = -84.43dB
SFDR = 85.16dB
TOTAL HARMONIC DISTORTION
vs. SOURCE IMPEDANCE
MAX1274 toc15
SOURCE IMPEDANCE (Ω)
THD (dB)
100
-95
-90
-85
-80
-75
-70
-65
-60
-100
10 1000
f
IN
= 100kHz
f
IN
= 500kHz