Datasheet

ADS4122, ADS4125
ADS4142, ADS4145
SBAS520A –FEBRUARY 2011– REVISED MARCH 2011 www.ti.com
ELECTRICAL CHARACTERISTICS: ADS4142/ADS4145
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.
ADS4142 (65MSPS) ADS4145 (125MSPS)
PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT
Resolution 14 14 Bits
f
IN
= 10MHz 73.9 73.7 dBFS
f
IN
= 70MHz 73.5 73.4 dBFS
SNR (signal-to-noise ratio), LVDS f
IN
= 100MHz 73.2 73.1 dBFS
f
IN
= 170MHz 69 72.4 70 72.2 dBFS
f
IN
= 300MHz 70.5 71.3 dBFS
f
IN
= 10MHz 73.5 73.2 dBFS
f
IN
= 70MHz 73.3 73 dBFS
SINAD (signal-to-noise and distortion ratio),
f
IN
= 100MHz 73 72.6 dBFS
LVDS
f
IN
= 170MHz 68 72.3 69 71.8 dBFS
f
IN
= 300MHz 69.2 70.6 dBFS
f
IN
= 10MHz 87 86 dBc
f
IN
= 70MHz 86.5 85.5 dBc
Spurious-free dynamic range SFDR f
IN
= 100MHz 87 82 dBc
f
IN
= 170MHz 71 85 72.5 81.5 dBc
f
IN
= 300MHz 72.5 77 dBc
f
IN
= 10MHz 84 83 dBc
f
IN
= 70MHz 84 83.5 dBc
Total harmonic distortion THD f
IN
= 100MHz 84 81 dBc
f
IN
= 170MHz 69.5 82.5 70.5 80 dBc
f
IN
= 300MHz 72.5 75.5 dBc
f
IN
= 10MHz 88 87 dBc
f
IN
= 70MHz 87 85.5 dBc
Second-harmonic distortion HD2 f
IN
= 100MHz 88 82 dBc
f
IN
= 170MHz 71 87 72.5 84 dBc
f
IN
= 300MHz 72.5 77 dBc
f
IN
= 10MHz 87 86 dBc
f
IN
= 70MHz 86.5 87 dBc
Third-harmonic distortion HD3 f
IN
= 100MHz 87 85 dBc
f
IN
= 170MHz 71 85 72.5 81.5 dBc
f
IN
= 300MHz 85 84 dBc
f
IN
= 10MHz 96 95 dBc
f
IN
= 70MHz 95 95 dBc
Worst spur
f
IN
= 100MHz 94 95 dBc
(other than second and third harmonics)
f
IN
= 170MHz 77.5 92 78.5 91 dBc
f
IN
= 300MHz 87 88 dBc
Two-tone intermodulation f
1
= 100MHz, f
2
= 105MHz,
IMD 88.5 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 11.5 11.3 LSBs
Differential nonlinearity DNL f
IN
= 170MHz –0.95 ±0.5 1.7 –0.95 ±0.5 1.7 LSBs
Integrated nonlinearity INL f
IN
= 170MHz ±1.5 ±4.5 ±1.5 ±4.5 LSBs
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Product Folder Link(s): ADS4122 ADS4125 ADS4142 ADS4145