LT1711 Linear Technology, LT1711 Datasheet - Page 3

• Manufacturer Part Number: LT1711
• Description: 4ns/ 150MHz Dual Comparator with Independent Input/Output Supplies
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at T
unless otherwise specified.
SYMBOL
t
t
t
I
I
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1715C is guaranteed to meet specified performance from
0 C to 70 C. The LT1715C is designed, characterized and expected to
meet specified performance from –40 C to 85 C but is not tested or QA
sampled at these temperatures. The LT1715I is guaranteed to meet
specified performance from –40 C to 85 C.
Note 3: Thermal resistances vary depending upon the amount of PC board
metal attached to Pin 5 of the device.
FR-4 board covered with 2oz copper on both sides and with 100mm
copper attached to Pin 5. Thermal performance can be improved beyond
the given specification by using a 4-layer board or by attaching more metal
area to Pin 5.
Note 4: If one input is within these common mode limits, the other input
can go outside the common mode limits and the output will be valid.
Note 5: The LT1715 comparator includes internal hysteresis. The trip
points are the input voltage needed to change the output state in each
direction. The offset voltage is defined as the average of V
while the hysteresis voltage is the difference of these two.
Note 6: The common mode rejection ratio is measured with V
V
V
Note 7: The power supply rejection ratio is measured with V
defined as the worst of: the change in offset voltage from V
2.7V to V
offset voltage from V
by 6V.
JITTER
CC
EE
S
r
f
EE
CM
t
PD
= – 5V and is defined as the change in offset voltage measured from
= – 5.1V to V
CC
= + V
PARAMETER
Differential Propagation Delay
Output Rise Time
Output Fall Time
Output Timing Jitter
Positive Input Stage Supply Current
(per Comparator)
Negative Input Stage Supply Current
(per Comparator)
Positive Output Stage Supply Current
(per Comparator)
S
CM
= 6V (with V
= 3.8V, divided by 8.9V.
EE
= 0V to V
EE
EE
= 0V) divided by 3.3V or the change in
= – 6V (with V
JA
is specified for a 2500mm
A
= 25 C. V
CC
= +V
S
TRIP
CC
CC
= 6V) divided
CM
= 5V, V
+
CC
= + V
and V
= 1V and is
90% to 10%
CONDITIONS
(Note 13) Between Channels
10% to 90%
V
f = 20MHz (Note 14)
+ V
+ V
+ V
+ V
+ V
V
= 5V,
IN
S
S
S
S
S
S
S
= V
The
2
= 1.2V
2
=
= V
= V
= V
= V
= V
TRIP
3/32"
of
EE
CC
CC
CC
CC
CC
CC
= –5V, +V
–
= 3V, V
,
P-P
denotes specifications that apply over the full operating temperature
= 5V, V
= 3V, V
= 5V, V
= 3V, V
= 5V, V
(6dBm), Z
Note 8: Because of internal hysteresis, there is no small-signal region in
which to measure gain. Proper operation of internal circuity is ensured by
measuring V
Note 9: Maximum toggle rate is defined as the highest frequency at which
a 100mV sinusoidal input results in an error free output toggling to greater
than 4V when high and to less than 1V when low on a 5V output supply.
Note 10: Propagation delay measurements made with 100mV steps.
Overdrive is measured relative to V
Note 11: t
low values of overdrive. The LT1715 is 100% tested with a 100mV step
and 20mV overdrive. Correlation tests have shown that t
guaranteed with this test.
Note 12: Propagation Delay Skew is defined as:
Note 13: Differential propagation delay is defined as the larger of the two:
Note 14: Package inductances combined with asynchronous activity on
the other channel can increase the output jitter. See Channel Interactions
in Applications Information. Specification above is with one channel active
only.
EE
EE
EE
EE
EE
EE
= 0V
t
S
SKEW
= – 5V
= 0V
= – 5V
= 0V
= – 5V
t
t
= 5V, V
PDLH
PDHL
IN
= |t
PD
= 50
= |t
= |t
OH
PDLH
cannot be measured in automatic handling equipment with
CM
PDLHA
PDHLA
and V
= 1V, C
– t
– t
– t
PDHL
t
t
OL
PD
PD
PDLHB
PDHLB
with only 20mV of overdrive.
+
–
|
OUT
|
|
= 10pF, V
TRIP
– 4.8
– 3.8
MIN
.
OVERDRIVE
– 2.9
– 2.4
TYP
0.3
0.9
4.6
3.7
15
11
2
2
1
= 20mV,
MAX
PD
1.6
7.5
1
2
6
LT1715
limits can be
UNITS
ps
ps
3
RMS
RMS
mA
mA
mA
mA
mA
mA
ns
ns
ns