Datasheet

LTC2285
3
2285fb
ANALOG INPUT
The l denotes the specifi cations which apply over the full operating temperature range, otherwise
specifi cations are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (A
IN
+
–A
IN
–
) 2.85V < V
DD
< 3.4V (Note 7)
●
±0.5V to ±1V V
V
IN,CM
Analog Input Common Mode (A
IN
+
+A
IN
–
)/2 Differential Input Drive (Note 7)
Single Ended Input Drive (Note 7)
●
●
1
0.5
1.5
1.5
1.9
2
V
V
I
IN
Analog Input Leakage Current 0V < A
IN
+
, A
IN
–
< V
DD
●
–1 1 µA
I
SENSE
SENSEA, SENSEB Input Leakage 0V < SENSEA, SENSEB < 1V
●
–3 3 µA
I
MODE
MODE Input Leakage Current 0V < MODE < V
DD
●
–3 3 µA
t
AP
Sample-and-Hold Acquisition Delay Time 0 ns
t
JITTER
Sample-and-Hold Acquisition Delay Time Jitter 0.2 ps
RMS
CMRR Analog Input Common Mode Rejection Ratio 80 dB
Full Power Bandwidth Figure 8 Test Circuit 640 MHz
DYNAMIC ACCURACY
The l denotes the specifi cations which apply over the full operating temperature range,
otherwise specifi cations are at T
A
= 25°C. A
IN
= –1dBFS. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 5MHz Input 72.4 dB
30MHz Input 72.3 dB
70MHz Input
●
68.9 72.2 dB
140MHz Input 71.7 dB
SFDR Spurious Free Dynamic Range
2nd or 3rd Harmonic
5MHz Input 88 dB
30MHz Input 85 dB
70MHz Input
●
70 82 dB
140MHz Input 78 dB
SFDR Spurious Free Dynamic Range
4th Harmonic or Higher
5MHz Input 90 dB
30MHz Input 90 dB
70MHz Input
●
77 90 dB
140MHz Input 90 dB
S/(N+D) Signal-to-Noise Plus Distortion Ratio 5MHz Input 72.2 dB
30MHz Input 72 dB
70MHz Input
●
67 71.9 dB
140MHz Input 70.2 dB
I
MD
Intermodulation Distortion f
IN
= 40MHz, 41MHz 85 dB
Crosstalk f
IN
= 100MHz –110 dB
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 4)
CONVERTER CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gain Matching External Reference ±0.3 %FS
Offset Matching ±2 mV
Transition Noise SENSE = 1V 1.3 LSB
RMS