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Linear Technology Electronic Components Datasheet

LT1394 Datasheet

7ns/ Low Power/ Single Supply/ Ground-Sensing Comparator

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LT1394
7ns, Low Power,
Single Supply, Ground-Sensing
Comparator
FEATURES
DESCRIPTIO
s UltraFastTM: 7ns
s Low Power: 6mA
s Low Offset Voltage: 0.8mV
s Operates Off Single 5V or Dual ±5V Supplies
s Input Common Mode Extends to Negative Supply
s No Minimum Input Slew Rate Requirement
s Complementary TTL Outputs
s Inputs Can Exceed Supplies without Phase Reversal
s Pin Compatible with LT1016, LT1116 and LT1671
s Output Latch Capability
s Available in 8-Lead MSOP and SO Packages
U
APPLICATIO S
s High Speed A/D Converters
s Zero-Crossing Detectors
s Current Sense for Switching Regulators
s Extended Range V/F Coverters
s Fast Pulse Height/Width Discriminators
s High Speed Triggers
s Line Receivers
s High Speed Sampling Circuits
, LTC and LT are registered trademarks of Linear Technology Corporation.
UltraFast is a trademark of Linear Technology Corporation.
The LT®1394 is an UltraFast(7ns) comparator with comple-
mentary outputs and latch. The input common mode range
extends from 1.5V below the positive supply down to the
negative supply rail. Like the LT1016, LT1116 and LT1671,
this comparator has complementary outputs designed to
interface directly to TTL or CMOS logic. The LT1394 may
operate from either a single 5V supply or dual ±5V supplies.
Low offset voltage specifications and high gain allow the
LT1394 to be used in precision applications.
The LT1394 is designed for improved speed and stability for
a wide range of operating conditions. The output stage
provides active drive in both directions for maximum speed
into TTL, CMOS or passive loads with minimal cross-conduc-
tion current. Unlike other fast comparators, the LT1394
remains stable even for slow transitions through the active
region, which eliminates the need to specify a minimum input
slew rate.
The LT1394 has an internal, TTL/CMOS compatible latch for
retaining data at the outputs. The latch holds data as long as
the LATCH pin is held high. Device parameters such as gain,
offset and negative power supply current are not significantly
affected by variations in negative supply voltage.
TYPICAL APPLICATIO
45MHz Single Supply Adaptive Trigger
2k 5V
2k
5V
10µF +
36
15
Q1 Q2
5V 2 4 3M
+
A1
LT1227
0.005µF
500pF
0.005µF
750
510
36
13 10
14 12
Q3 Q4
15 11
+
0.1µF
100µF
0.1µF
2k
3M
INPUT
5V
+
A2
LT1006
470
0.1µF
470
Q1, Q2, Q3, Q4 = CA3096 ARRAY:
TIE SUBSTRATE (PIN 16) TO GROUND
= 1N4148
+
LT1394
TRIGGER
OUT
1394 F18
Propagation Delay vs
Input Overdrive
12
TA = 25°C
10
VSTEP = 100mV
VS = ±5V
8
tPDLH
6
tPDHL
4
2
0
0 10 20 30 40
OVERDRIVE (mV)
50
1394 TA02
1


Linear Technology Electronic Components Datasheet

LT1394 Datasheet

7ns/ Low Power/ Single Supply/ Ground-Sensing Comparator

No Preview Available !

LT1394
ABSOLUTE MAXIMUM RATINGS (Note 1)
Total Supply Voltage (V+ to V) ............................... 12V
Positive Supply Voltage ............................................. 7V
Negative Supply Voltage .......................................... – 7V
Differential Input Voltage ....................................... ±12V
Input and Latch Current (Note 2) ........................ ±10mA
Output Current (Continuous)(Note 2) ................. ±20mA
Operating Temperature Range ................ – 40°C to 85°C
Specified Temperature Range (Note 3) ... – 40°C to 85°C
Junction Temperature ........................................... 150°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
V+ 1
8 Q OUT
+IN 2
7 Q OUT
–IN 3
V4
6 GND
5 LATCH
ENABLE
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 250°C/ W
ORDER PART
NUMBER
LT1394CMS8
MS8 PART MARKING
LTBH
Consult factory for Military grade parts.
TOP VIEW
V+ 1
+IN 2
–IN 3
V4
+
8 Q OUT
7 Q OUT
6 GND
5
LATCH
ENABLE
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 190°C/ W
ORDER PART
NUMBER
LT1394CS8
LT1394IS8
S8 PART MARKING
1394
1394I
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
V+ = 5V, V= – 5V, VOUT(Q) = 1.4V, VLATCH = VCM = 0V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
VOS Input Offset Voltage
RS 100(Note 4)
0.8 2.5
q 4.0
VOS
T
IOS
Input Offset Voltage Drift
Input Offset Current
q4
0.1 0.5
q 0.8
IB Input Bias Current
(Note 5)
2 4.5
q 7.0
VCMR
Input Voltage Range (Note 6)
Single 5V Supply
q –5
q0
3.5
3.5
CMRR
Common Mode Rejection Ratio
PSRR
Power Supply Rejection Ratio
– 5V VCM 3.5V, TA > 0°C
– 5V VCM 3.3V, TA 0°C
Single 5V Supply
0V VCM 3.5V, TA > 0°C
0V VCM 3.3V, TA 0°C
4.6V V + 5.4V
– 7V V – 2V
55
55
55
55
q 50
q 65
100
100
65
100
AV Small Signal Voltage Gain
VOH Output Voltage Swing High
1V VOUT 2V
V + 4.6V, IOUT = 1mA
V + 4.6V, IOUT = 4mA
750
q 2.7
q 2.4
1600
3.1
3.0
UNITS
mV
mV
µV/°C
µA
µA
µA
µA
V
V
dB
dB
dB
dB
dB
dB
V/V
V
V
2


Part Number LT1394
Description 7ns/ Low Power/ Single Supply/ Ground-Sensing Comparator
Maker Linear Technology
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LT1394 Datasheet PDF





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