Datasheet

LTC2248/LTC2247/LTC2246
5
224876fa
TI I G CHARACTERISTICS
UW
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 4)
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to ground with GND and OGND
wired together (unless otherwise noted).
Note 3: When these pin voltages are taken below GND or above V
DD
, they
will be clamped by internal diodes. This product can handle input currents
of greater than 100mA below GND or above V
DD
without latchup.
Note 4: V
DD
= 3V, f
SAMPLE
= 65MHz (LTC2248), 40MHz (LTC2247), or
25MHz (LTC2246), input range = 2V
P-P
with differential drive, unless
otherwise noted.
Note 5: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 6: Offset error is the offset voltage measured from –0.5 LSB when
the output code flickers between 00 0000 0000 0000 and
11 1111 1111 1111.
Note 7: Guaranteed by design, not subject to test.
Note 8: V
DD
= 3V, f
SAMPLE
= 65MHz (LTC2248), 40MHz (LTC2247), or
25MHz (LTC2246), input range = 1V
P-P
with differential drive.
Note 9: Recommended operating conditions.
LTC2248 LTC2247 LTC2246
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
f
s
Sampling Frequency (Note 9) ● 165140125MHz
t
L
CLK Low Time Duty Cycle Stabilizer Off ● 7.3 7.7 500 11.8 12.5 500 18.9 20 500 ns
Duty Cycle Stabilizer On
● 5 7.7 500 5 12.5 500 5 20 500 ns
(Note 7)
t
H
CLK High Time Duty Cycle Stabilizer Off ● 7.3 7.7 500 11.8 12.5 500 18.9 20 500 ns
Duty Cycle Stabilizer On
● 5 7.7 500 5 12.5 500 5 20 500 ns
(Note 7)
t
AP
Sample-and-Hold 0 0 0 ns
Aperture Delay
t
D
CLK to DATA delay C
L
= 5pF (Note 7) ● 1.4 2.7 5.4 1.4 2.7 5.4 1.4 2.7 5.4 ns
Data Access Time C
L
= 5pF (Note 7) ● 4.3 10 4.3 10 4.3 10 ns
After OE↓
BUS Relinquish Time (Note 7) ● 3.3 8.5 3.3 8.5 3.3 8.5 ns
Pipeline 5 5 5 Cycles
Latency
LTC2248: Typical DNL,
2V Range, 65Msps
LTC2248: Typical INL,
2V Range, 65Msps
CODE
0
INL ERROR (LSB)
12288
2248 G01
4096 8192 16384
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
CODE
0
DNL ERROR (LSB)
12288
2248 G02
4096 8192 16384
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
TYPICAL PERFOR A CE CHARACTERISTICS
UW