ADC324X Datasheet, PDF (20/81 Pages) Texas Instruments – The ADC324x are a high-linearity

ADC3241, ADC3242, ADC3243, ADC3244
SBAS671B – JULY 2014 – REVISED MARCH 2015
www.ti.com
Typical Characteristics: ADC3241 (continued)
Typical values are at T_A= 25°C, ADC sampling rate = 25 MSPS, 50% clock duty cycle, AVDD = 1.8 V, DVDD = 1.8 V, –1-
dBFS differential input, 2-V_PP full-scale, 32k-point FFT, chopper disabled, and SNR reported with a 1-MHz offset from dc
when chopper is disabled and from f_S / 2 when chopper is enabled, unless otherwise noted.
0
0
-10
-10
-20
-20
-30
-30
-40
-40
-50
-50
-60
-60
-70
-70
-80
-80
-90
-90
-100
-100
-110
-110
-120
0
2.5
5
7.5
10
12.5
Frequency (MHz)
D713
f_IN1 = 185 MHz, f_IN2 = 190 MHz, IMD3 = 78 dBFS,
each tone at –7 dBFS
-120
0
2.5
5
7.5
10
12.5
Frequency (MHz)
D714
f_IN1 = 185 MHz, f_IN2 = 190 MHz, IMD3 = 89 dBFS,
each tone at –36 dBFS
Figure 13. FFT for Two-Tone Input Signal
(–7 dBFS at 185 MHz and 190 MHz)
-90
Figure 14. FFT for Two-Tone Input Signal
(–36 dBFS at 185 MHz and 190 MHz)
-80
-95
-100
-105
-110
-85
-90
-95
-100
-105
-115
-35 -31 -27 -23 -19 -15 -11
Each Tone Amplitude (dBFS)
-7
D715
-110
-35 -31 -27 -23 -19 -15 -11
Each Tone Amplitude (dBFS)
-7
D716
Figure 15. Intermodulation Distortion vs Input Amplitude
(46 MHz and 50 MHz)
75
Dither_EN
74
Dither_DIS
73
72
71
70
69
68
67
0 50 100 150 200 250 300 350 400
Frequency (MHz)
D717
Figure 16. Intermodulation Distortion vs Input Amplitude
(185 MHz and 190 MHz)
104
Dither_EN
Dither_DIS
96
88
80
72
64
56
0 50 100 150 200 250 300 350 400
Frequency (MHz)
D718
Figure 17. Signal-to-Noise Ratio vs Input Frequency
Figure 18. Spurious-Free Dynamic Range vs
Input Frequency
20
Submit Documentation Feedback
Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: ADC3241 ADC3242 ADC3243 ADC3244