Datasheet

ADS6445, ADS6444
ADS6443, ADS6442
SLAS531B –MAY 2007–REVISED DECEMBER 2009 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
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 = 3.3 V, maximum rated sampling frequency, 50% clock duty cycle, –1dBFS differential analog input, internal reference
mode (unless otherwise noted).
ADS6445 ADS6444 ADS6443 ADS6442
F
s
= 125 MSPS F
s
= 105 MSPS F
s
= 80 MSPS F
s
= 65 MSPS
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
Fin = 10 MHz 87 91 92 93
Fin = 50 MHz 73 81 80 77 87.5 79 88
Fin = 70 MHz 78 74 81 86 86
Fin = 100 MHz 86 88 84 82
HD3
0 dB gain 76 79 80 81
Third dBc
Fin = 170
harmonic
3.5 dB 79 83 84 84
MHz
Coarse gain
0 dB gain 77 77 78 79
Fin = 230
3.5 dB 80 80 82 82
MHz
Coarse gain
Fin = 10 MHz 91 91 94 95
Fin = 50 MHz 87 87 92 93
Worst
harmonic
Fin = 100 MHz 90 91 92 92 dBc
(other than
HD2, HD3)
Fin = 170 MHz 88 88 90 90
Fin = 230 MHz 87 87 87 87
Fin = 10 MHz 86 89.5 90 91
Fin = 50 MHz 71 80 75 85.5 77 85.6
THD
Fin = 70 MHz 72 79
Total
dBc
harmonic
Fin = 100 MHz 84.5 86 83 80.5
distortion
Fin = 170 MHz 73.5 77 78.5 79.5
Fin = 230 MHz 74 75 76 77
ENOB Fin = 50 MHz 11.0 11.7 11.1 11.9 11.4 12
Effective Bits
11.3 11.7
Fin = 70 MHz
number of bits
F1= 46.09 MHz, 88 90 96 100
IMD
F2 = 50.09 MHz
2-Tone
dBFS
intermodulatio
F1= 185.09 MHz, 86 88 93 96
n distortion
F2 = 190.09 MHz
Near channel 90 92 94 100
Cross-talk signal
frequency = 10 MHz
Cross-talk dBc
Far channel 103 105 106 108
Cross-talk signal
frequency = 10 MHz
Recovery to within 1% (of final 1 1 1 1 Clock
Input overload
value) for 6-dB overload with cycles
recovery
sine wave input
AC PSRR 35 35 35 35 dBc
Power Supply < 100 MHz signal, 100 mV
PP
Rejection on AVDD supply
Ratio
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