Datasheet

ELECTRICAL CHARACTERISTICS
ADS6425
www.ti.com ......................................................................................................................................................... SLWS197B – MARCH 2007 – REVISED JUNE 2009
Typical values are at 25 ° C, min and max values are across the full temperature range T
MIN
= – 40 ° C to T
MAX
= 85 ° C, AVDD =
LVDD = 3.3V, sampling rate = 125MSPS, 50% clock duty cycle, – 1dBFS differential analog input, internal reference mode
(unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DYNAMIC AC CHARACTERISTICS
Fin = 10 MHz 70.9
Fin = 50 MHz 67.5 70.5
Fin = 100 MHz 69.9
SNR Signal to noise ratio 0 dB Gain 68.5 dBFS
Fin = 170 MHz
3.5 dB Coarse gain 68.1
0 dB Gain 67.4
Fin = 230 MHz
3.5 dB Coarse gain 67.1
Fin = 10 MHz 70.7
Fin = 50 MHz 67 70
Fin = 100 MHz 69.7
SINAD Signal to noise and distortion ratio 0 dB Gain 66.9 dBFS
Fin = 170 MHz
3.5 dB Coarse gain 67.4
0 dB Gain 66
Fin = 230 MHz
3.5 dB Coarse gain 66.5
RMS Output noise Inputs tied to common-mode 0.407 LSB
Fin = 10 MHz 90
Fin = 50 MHz 73 83
Fin = 100 MHz 87
SFDR Spurious free dynamic range 0 dB Gain 75 dBc
Fin = 170 MHz
3.5 dB Coarse gain 79
0 dB Gain 74
Fin = 230 MHz
3.5 dB Coarse gain 78
Fin = 10 MHz 93
Fin = 50 MHz 73 91
Fin = 100 MHz 90
HD2 Second harmonic 0 dB Gain 85 dBc
Fin = 170 MHz
3.5 dB Coarse gain 88
0 dB Gain 82
Fin = 230 MHz
3.5 dB Coarse gain 85
Fin = 10 MHz 90
Fin = 50 MHz 73 83
Fin = 100 MHz 87
HD3 Third harmonic 0 dB Gain 75 dBc
Fin = 170 MHz
3.5 dB Coarse gain 79
0 dB Gain 74
Fin = 230 MHz
3.5 dB Coarse gain 78
Fin = 10 MHz 95
Fin = 50 MHz 94
Worst harmonic (other than HD2,
Fin = 100 MHz 91 dBc
HD3)
Fin = 170 MHz 88
Fin = 230 MHz 86
Copyright © 2007 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): ADS6425