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ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - AD converter (ADC) External , Internal TQFN 20 EP
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MAX1377/MAX1379/MAX1383
Dual, 12-Bit, 1.25Msps Simultaneous-Sampling
ADCs with Serial Interface
10 ______________________________________________________________________________________
MAX1379 FFT PLOT
MAX1377 toc19
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
f
SAMPLE
= 1.8Msps
f
SCLK
= 28.8MHz
f
IN
= 300kHz
SINAD = 70dB
SNR = 70.27dB
THD = -82.2dB
SFDR = 81.81dB
V
REF
= 4.096V
0
-20
-40
-60
-80
-100
-120
0 400 600 800200
0
-20
-40
-60
-80
-100
-120
0 300 600 900
MAX1379 FFT PLOT
MAX1377 toc20
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
f
SAMPLE
= 1.8Msps
f
SCLK
= 28.8MHz
f
IN
= 500kHz
SINAD = 69.58dB
SNR = 69.75dB
THD = -83.79dB
SFDR = 84.69dB
V
REF
= 4.096V
MAX1379 TOTAL HARMONIC DISTORTION
vs. SOURCE IMPEDENCE
SOURCE IMPEDANCE (Ω)
TOTAL HARMONIC DISTORTION (dBc)
100
-82
-84
-80
-78
-76
-74
-72
-86
10 1000
MAX1377 toc21
f
IN
= 500kHz
f
IN
= 100kHz
MAX1379 UNIPOLAR DNL
vs. DIGITAL OUTPUT CODE
MAX1377 toc13
DIGITAL OUTPUT CODE
DNL (LSB)
307220481024
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0 4096
MAX1379 BIPOLAR DNL
vs. DIGITAL OUTPUT CODE
MAX1377 toc14
DIGITAL OUTPUT CODE
DNL (LSB)
307220481024
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0 4096
-1.5
-1.2
-0.6
-0.9
-0.3
0
-40 10-15 35 60 85
MAX1379 OFFSET ERROR
vs. TEMPERATURE
MAX1377 toc15
TEMPERATURE (°C)
OFFSET ERROR (LSB)
CHANNEL 1
CHANNEL 2
0
0.4
1.2
0.8
1.6
2.0
-40 10-15 35 60 85
MAX1379 GAIN ERROR
vs. TEMPERATURE
MAX1377 toc16
TEMPERATURE (°C)
GAIN ERROR (LSB)
CHANNEL 2
CHANNEL 1
Typical Operating Characteristics (continued)
(V
AVDD
= 5V/3V, V
L
= 3V, f
SCLK
= 20MHz, T
A
= +25°C, unless otherwise noted.)
MAX1379 FFT PLOT
MAX1377 toc17
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
f
SAMPLE
= 1.8Msps
f
SCLK
= 28.8MHz
f
IN
= 100kHz
SINAD = 70.43dB
SNR = 70.72dB
THD = -82.33dB
SFDR = 82.78dB
V
REF
= 4.096V
0
-20
-40
-60
-80
-100
-120
0 300 600 900
MAX1379 FFT PLOT
MAX1377 toc18
ANALOG INPUT FREQUENCY (kHz)
AMPLITUDE (dB)
0 300 600 900
0
-20
-40
-60
-80
-100
-120
f
SAMPLE
= 1.8Msps
f
SCLK
= 28.8MHz
f
IN
= 250kHz
SINAD = 70.05dB
SNR = 70.32dB
THD = -82.35dB
SFDR = 83.22dB
V
REF
= 4.096V