LT1715
1
1715fa
TYPICAL APPLICATION
DESCRIPTION
4ns, 150MHz
Dual Comparator with
Independent Input/Output Supplies
The LT
®
1715 is an UltraFast™ dual comparator optimized for
low voltage operation. Separate supplies allow independent
analog input ranges and output logic levels with no loss of
performance. The input voltage range extends from 100mV
below V
EE
to 1.2V below V
CC
. Internal hysteresis makes the
LT1715 easy to use even with slow moving input signals.
The rail-to-rail outputs directly interface toTTL and CMOS.
The symmetric output drive results in similar rise and fall
times that can be harnessed for analog applications or for
easy translation to other single supply logic levels.
The LT1715 is available in the 10-pin MSOP package. The
pinout of the LT1715 minimizes parasitic effects by placing
the most sensitive inputs away from the outputs, shielded
by the power rails.
For a dual/quad single supply comparator with simi-
lar propagation delay, see the LT1720/LT1721. For a
single comparator with similar propagation delay, see
the LT1719.
100MHz Dual Differential Line Receiver
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
UltraFast is a trademark of Linear Technology Corporation.
FEATURES
APPLICATIONS
n
UltraFast: 4ns at 20mV Overdriven
n
150MHz Toggle Frequency
n
Separate Input and Output Power Supplies
n
Low Power: 4.6mA per Comparator at 3V
n
Pinout Optimized for High Speed Use
n
Output Optimized for 3V and 5V Supplies
n
TTL/CMOS Compatible Rail-to-Rail Output
n
Input Voltage Range Extends 100mV
Below Negative Rail
n
Internal Hysteresis with Specifi ed Limits
n
Specifi ed for –40°C to 125°C Temperature Range
n
Available in the 10-pin MSOP Package
n
High Speed Differential Line Receivers
n
Level Translators
n
Window Comparators
n
Crystal Oscillator Circuits
n
Threshold Detectors/Discriminators
n
High Speed Sampling Circuits
n
Delay Lines
Line Receiver Response to 100MHz Clock,
50MHz Data Both with 25mV
P-P
Inputs
+
+
1715 TA01
IN A
OUT A
OUT B
–5V
5V 3V
IN B
5ns/DIV
1715 TA02
1V/DIV
1V/DIV
CLOCK OUT
DATA OUT
0V
0V
3V
3V
FET PROBES
LT1715
2
1715fa
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Supply Voltage
+V
S
to GND .............................................................7V
V
CC
to V
EE
..........................................................13.2V
+V
S
to V
EE
.......................................................... 13.2V
V
EE
to GND ......................................... –13.2V to 0.3V
Input Current (+IN, –IN) .......................................±10mA
Output Current (Continuous) ...............................±20mA
Operating Temperature Range (Note 2)
LT1715C ............................................... 40°C to 85°C
LT1715I ................................................40°C to 85°C
LT1715H ............................................40°C to 125°C
Specifi ed Temperature Range (Note 3)
LT1715C ................................................... 0°C to 70°C
LT1715I ................................................ –40°C to 85°C
LT1715H ............................................ –40°C to 125°C
Junction Temperature ........................................... 150°C
Storage Temperature Range ................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
1
2
3
4
5
+IN A
–IN A
–IN B
+IN B
V
EE
10
9
8
7
6
V
CC
+V
S
OUT A
OUT B
GND
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
A
B
T
JMAX
= 150°C, θ
JA
= 120°C/W (NOTE 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
– V
EE
Input Supply Voltage
l
2.7 12 V
+V
S
Output Supply Voltage
l
2.7 6 V
V
CMR
Input Voltage Range (Note 5)
l
V
EE
– 0.1 V
CC
– 1.2 V
V
TRIP
+
Input Trip Points (Note 6) LT1715C, LT1715I
LT1715H
l
l
–1.5
–1.8
5.5
6
mV
mV
V
TRIP
Input Trip Points (Note 6) LT1715C, LT1715I
LT1715H
l
l
–5.5
–6
1.5
1.8
mV
mV
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LT1715CMS#PBF LT1715CMS#TRPBF LTVQ 10-Lead Plastic MSOP 0°C to 70°C
LT1715IMS#PBF LT1715IMS#TRPBF LTVV 10-Lead Plastic MSOP –40°C to 85°C
LT1715HMS#PBF LT1715HMS#TRPBF LTVV 10-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 5V, V
EE
= –5V, +V
S
= 5V, V
CM
= 1V, C
OUT
= 10pF, V
OVERDRIVE
= 20mV,
unless otherwise specifi ed.
LT1715
3
1715fa
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 5V, V
EE
= –5V, +V
S
= 5V, V
CM
= 1V, C
OUT
= 10pF, V
OVERDRIVE
= 20mV,
unless otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 6)
LT1715C, LT1715I
LT1715H
l
l
0.4 2.5
3.5
4
mV
mV
mV
V
HYST
Input Hysteresis Voltage (Note 6) LT1715C, LT1715I
LT1715H
l
l
2
2
3.5 6
7
mV
mV
V
OS
/ΔT Input Offset Voltage Drift
l
10 μV/°C
I
B
Input Bias Current LT1715C, LT1715I
LT1715H
l
l
–6
–7
–2.5 0
0
μA
μA
I
OS
Input Offset Current LT1715C, LT1715I
LT1715H
l
l
0.2 0.6
1
μA
μA
CMRR Common Mode Rejection Ratio (Note 7) LT1715C, LT1715I
LT1715H
l
l
60
55
70 dB
dB
PSRR Power Supply Rejection Ratio (Note 8)
l
65 80 dB
A
V
Voltage Gain (Note 9)
V
OH
Output High Voltage I
SOURCE
= 4mA, V
IN
= V
TRIP
+
+ 20mV
l
+V
S
– 0.4 V
V
OL
Output Low Voltage I
SINK
= 10mA, V
IN
= V
TRIP
– 20mV
l
0.4 V
f
MAX
Maximum Toggle Frequency (Note 10) 150 MHz
t
PD20
Propagation Delay V
OVERDRIVE
= 20mV (Note 11),
V
CC
= 5V, V
EE
= –5V LT1715C, LT1715I
LT1715H
l
l
2.8
2.8
2.8
46
7
8
ns
ns
ns
V
OVERDRIVE
= 20mV, V
CC
= 5V, V
EE
= 0V 4.4 ns
V
OVERDRIVE
= 20mV, V
CC
= 3V, V
EE
= 0V
LT1715C, LT1715I
LT1715H
l
l
3
3
3
4.8 6.5
7.5
8
ns
ns
ns
t
PD5
Propagation Delay V
OVERDRIVE
= 5mV, V
EE
= 0V (Notes 11, 12)
l
69
12
ns
ns
t
SKEW
Propagation Delay Skew (Note 13) Between t
PD
+
/t
PD
, V
EE
= 0V
l
0.5 1.5 ns
Δt
PD
Differential Propagation Delay (Note 14) Between Channels
l
0.3 1 ns
t
r
Output Rise Time 10% to 90% 2 ns
t
f
Output Fall Time 90% to 10% 2 ns
t
JITTER
Output Timing Jitter V
IN
= 1.2V
P-P
(6dBm), Z
IN
= 50 t
PD
+
f = 20MHz (Note 15) t
PD
15
11
ps
RMS
ps
RMS
I
CC
Positive Input Stage Supply Current
(per Comparator)
+V
S
= V
CC
= 5V, V
EE
= –5V LT1715C, LT1715I
LT1715H
l
l
12
2.2
mA
mA
+V
S
= V
CC
= 3V, V
EE
= 0V LT1715C, LT1715I
LT1715H
l
l
0.9 1.6
1.8
mA
mA
I
EE
Negative Input Stage Supply Current
(per Comparator)
+V
S
= V
CC
= 5V, V
EE
= –5V LT1715C, LT1715I
LT1715H
l
l
–4.8
–5.3
–2.9 mA
mA
+V
S
= V
CC
= 3V, V
EE
= 0V LT1715C, LT1715I
LT1715H
l
l
–3.8
–4.3
–2.4 mA
mA
I
S
Positive Output Stage Supply Current
(per Comparator)
+V
S
= V
CC
= 5V, V
EE
= –5V LT1715C, LT1715I
LT1715H
l
l
4.6 7.5
8
mA
mA
V
S
= V
CC
= 3V, V
EE
= 0V LT1715C, LT1715I
LT1715H
l
l
3.7 6
6.5
mA
mA

LT1715HMS#PBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Analog Comparators 4ns Dual Rail-Rail Comparator
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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