LTC2281 Просмотр технического описания (PDF) - Linear Technology
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LTC2281 Datasheet PDF : 24 Pages
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LTC2281
CONVERTER CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Gain Matching
External Reference
±0.3
%FS
Offset Matching
±2
mV
Transition Noise
SENSE = 1V
0.08
LSBRMS
ANALOG INPUT The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. (Note 4)
SYMBOL
VIN
VIN,CM
PARAMETER
Analog Input Range (AIN+ –AIN–)
Analog Input Common Mode (AIN+ +AIN–)/2
CONDITIONS
MIN
TYP
MAX
2.85V < VDD < 3.4V (Note 7)
●
±0.5V to ±1V
Differential Input Drive (Note 7)
●
1
1.5
1.9
Single Ended Input Drive (Note 7) ● 0.5
1.5
2
UNITS
V
V
V
IIN
ISENSE
Analog Input Leakage Current
SENSEA, SENSEB Input Leakage
0V < AIN+, AIN– < VDD
0V < SENSEA, SENSEB < 1V
● –1
● –3
1
μA
3
μA
IMODE
tAP
tJITTER
MODE Input Leakage Current
Sample-and-Hold Acquisition Delay Time
Sample-and-Hold Acquisition Delay Time Jitter
0V < MODE < VDD
● –3
0
0.2
3
μA
ns
psRMS
CMRR Analog Input Common Mode Rejection Ratio
80
dB
Full Power Bandwidth
Figure 8 Test Circuit
640
MHz
DYNAMIC ACCURACY The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
SNR
Signal-to-Noise Ratio
5MHz Input
61.6
dB
30MHz Input
61.6
dB
70MHz Input
● 60 61.5
dB
140MHz Input
61.4
dB
SFDR
Spurious Free Dynamic Range
2nd or 3rd Harmonic
5MHz Input
30MHz Input
85
dB
85
dB
70MHz Input
● 69 82
dB
140MHz Input
77
dB
SFDR
Spurious Free Dynamic Range
4th Harmonic or Higher
5MHz Input
30MHz Input
85
dB
85
dB
70MHz Input
● 75 85
dB
140MHz Input
85
dB
S/(N+D)
Signal-to-Noise Plus Distortion Ratio
5MHz Input
61.5
dB
30MHz Input
61.5
dB
70MHz Input
● 60 61.4
dB
140MHz Input
61.2
dB
IMD
Intermodulation Distortion
Crosstalk
fIN = 40MHz, 41MHz
fIN = 100MHz
80
dB
–110
dB
2281fb
3
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