Datasheet

ADS4122, ADS4125
ADS4142, ADS4145
www.ti.com SBAS520A –FEBRUARY 2011– REVISED MARCH 2011
ELECTRICAL CHARACTERISTICS: ADS4122/ADS4125
Typical values are at +25°C, AVDD = 1.8V, DRVDD = 1.8V, 50% clock duty cycle, –1dBFS differential analog input, 0dB gain,
and DDR LVDS interface, unless otherwise noted. Minimum and maximum values are across the full temperature range:
T
MIN
= –40°C to T
MAX
= +85°C, AVDD = 1.8V, and DRVDD = 1.8V.
ADS4122 (65MSPS) ADS4125 (125MSPS)
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
Resolution 12 12 Bits
f
IN
= 10MHz 71.1 71 dBFS
f
IN
= 70MHz 70.9 70.8 dBFS
SNR (signal-to-noise ratio), LVDS f
IN
= 100MHz 70.7 70.6 dBFS
f
IN
= 170MHz 67 70.2 68 70.1 dBFS
f
IN
= 300MHz 68.8 69.6 dBFS
f
IN
= 10MHz 70.8 70.7 dBFS
f
IN
= 70MHz 70.8 70.7 dBFS
SINAD (signal-to-noise and distortion ratio),
f
IN
= 100MHz 70.6 70.3 dBFS
LVDS
f
IN
= 170MHz 66 70.1 67 69.8 dBFS
f
IN
= 300MHz 68 69 dBFS
f
IN
= 10MHz 86.5 86 dBc
f
IN
= 70MHz 86 86 dBc
Spurious-free dynamic range SFDR f
IN
= 100MHz 87 82 dBc
f
IN
= 170MHz 70 85 71 81 dBc
f
IN
= 300MHz 72.5 77 dBc
f
IN
= 10MHz 82.5 82 dBc
f
IN
= 70MHz 84 83.5 dBc
Total harmonic distortion THD f
IN
= 100MHz 84 80.5 dBc
f
IN
= 170MHz 69.5 81 69.5 79.5 dBc
f
IN
= 300MHz 72 75.5 dBc
f
IN
= 10MHz 87 87 dBc
f
IN
= 70MHz 88 86 dBc
Second-harmonic distortion HD2 f
IN
= 100MHz 88 82 dBc
f
IN
= 170MHz 70 86 71 83 dBc
f
IN
= 300MHz 72.5 77 dBc
f
IN
= 10MHz 86.5 86 dBc
f
IN
= 70MHz 86 88 dBc
Third-harmonic distortion HD3 f
IN
= 100MHz 87 85 dBc
f
IN
= 170MHz 70 85 71 81 dBc
f
IN
= 300MHz 85 82 dBc
f
IN
= 10MHz 96 95 dBc
f
IN
= 70MHz 96 95 dBc
Worst spur
f
IN
= 100MHz 94 95 dBc
(other than second and third harmonics)
f
IN
= 170MHz 76.5 92 76.5 91 dBc
f
IN
= 300MHz 88 88 dBc
Two-tone intermodulation f
1
= 100MHz, f
2
= 105MHz,
IMD 90 87.5 dBFS
distortion each tone at –7dBFS
Recovery to within 1% (of final
Clock
Input overload recovery value) for 6dB overload with 1 1
cycles
sine-wave input
For 100mV
PP
signal on AVDD
AC power-supply rejection ratio PSRR > 30 > 30 dB
supply, up to 10MHz
Effective number of bits ENOB f
IN
= 170MHz 11.2 11.2 LSBs
Differential nonlinearity DNL f
IN
= 170MHz –0.85 ±0.2 1.5 –0.85 ±0.2 1.5 LSBs
Integrated nonlinearity INL f
IN
= 170MHz ±0.3 3.5 ±0.35 3.5 LSBs
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Product Folder Link(s): ADS4122 ADS4125 ADS4142 ADS4145