Datasheet
AC CHARACTERISTICS
ADS5270
SBAS293F – JANUARY 2004 – REVISED JANUARY 2009 ...............................................................................................................................................
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T
MIN
= – 40 ° C and T
MAX
= +85 ° C. Typical values are at T
A
= +25 ° C, clock frequency = maximum specified, 50% clock duty
cycle, AVDD = 3.3V, LVDD = 3.3V, – 1dBFS, I
SET
= 56.2k Ω , internal voltage reference, and LVDS buffer current at 3.5mA per
channel, unless otherwise noted.
ADS5270
PARAMETER CONDITIONS MIN TYP MAX UNITS
DYNAMIC CHARACTERISTICS
f
IN
= 1MHz 89 dBc
f
IN
= 5MHz 78 87 dBc
SFDR Spurious-Free Dynamic Range
f
IN
= 10MHz 85 dBc
f
IN
= 20MHz 83 dBc
f
IN
= 1MHz 95 dBc
f
IN
= 5MHz 85 95 dBc
HD
2
2nd-Order Harmonic Distortion
f
IN
= 10MHz 90 dBc
f
IN
= 20MHz 87 dBc
f
IN
= 1MHz 89 dBc
f
IN
= 5MHz 78 87 dBc
HD
3
3rd-Order Harmonic Distortion
f
IN
= 10MHz 85 dBc
f
IN
= 20MHz 83 dBc
f
IN
= 1MHz 70.5 dBFS
f
IN
= 5MHz 68 70.5 dBFS
SNR Signal-to-Noise Ratio
f
IN
= 10MHz 70.5 dBFS
f
IN
= 20MHz 70.5 dBFS
f
IN
= 1MHz 70 dBFS
f
IN
= 5MHz 67.5 70 dBFS
SINAD Signal-to-Noise and Distortion
f
IN
= 10MHz 70 dBFS
f
IN
= 20MHz 70 dBFS
ENOB Effective Number of Bits f
IN
= 5MHz 11.3 Bits
5MHz Full-Scale Signal Applied to 7 Channels; Measurement – 90 dBc
Crosstalk
Taken on the Channel with No Input Signal
f
1
= 9.5MHz at – 7dBFS – 85 dBFS
Two-Tone, Third-Order
IMD3
Intermodulation Distortion
f
2
= 10.2MHz at – 7dBFS
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