LT1394CS8#TR Linear Technology, LT1394CS8#TR Datasheet

IC COMPARATOR 7NS LOW PWR 8SOIC

LT1394CS8#TR

Manufacturer Part Number
LT1394CS8#TR
Description
IC COMPARATOR 7NS LOW PWR 8SOIC
Manufacturer
Linear Technology
Series
UltraFast™r
Type
General Purposer
Datasheet

Specifications of LT1394CS8#TR

Number Of Elements
1
Output Type
CMOS, Complementary, TTL
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1394CS8#TRLT1394CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1394CS8#TRLT1394CS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1394CS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
10 F
UltraFast is a trademark of Linear Technology Corporation.
5V
, LTC and LT are registered trademarks of Linear Technology Corporation.
UltraFast
Low Power: 6mA
Low Offset Voltage: 0.8mV
Operates Off Single 5V or Dual 5V Supplies
Input Common Mode Extends to Negative Supply
No Minimum Input Slew Rate Requirement
Complementary TTL Outputs
Inputs Can Exceed Supplies without Phase Reversal
Pin Compatible with LT1016, LT1116 and LT1671
Output Latch Capability
Available in 8-Lead MSOP and SO Packages
High Speed A/D Converters
Zero-Crossing Detectors
Current Sense for Switching Regulators
Extended Range V/F Coverters
Fast Pulse Height/Width Discriminators
High Speed Triggers
Line Receivers
High Speed Sampling Circuits
+
2k
INPUT
750
0.1 F
TM
: 7ns
+
36
100 F
+
LT1227
U
510
A1
5V
45MHz Single Supply Adaptive Trigger
0.1 F
Q1
Q3
15
2
13
3
2k
0.005 F
1
14
U
2k
12
5
10
11
6
4
5V
Q2
Q4
0.005 F
3M
3M
500pF
+
470
LT1006
Single Supply, Ground-Sensing
A2
5V
0.1 F
470
DESCRIPTIO
The LT
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.
Q1, Q2, Q3, Q4 = CA3096 ARRAY:
TIE SUBSTRATE (PIN 16) TO GROUND
®
1394 is an UltraFast (7ns) comparator with comple-
= 1N4148
+
LT1394
U
TRIGGER
OUT
1394 F18
7ns, Low Power,
12
10
Comparator
8
6
4
2
0
0
T
V
V
A
STEP
S
= 25 C
= 5V
Propagation Delay vs
10
= 100mV
Input Overdrive
OVERDRIVE (mV)
20
t
PDLH
LT1394
30
t
PDHL
40
1
1394 TA02
50

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LT1394CS8#TR Summary of contents

Page 1

... Current Sense for Switching Regulators Extended Range V/F Coverters Fast Pulse Height/Width Discriminators High Speed Triggers Line Receivers High Speed Sampling Circuits , LTC and LT are registered trademarks of Linear Technology Corporation. UltraFast is a trademark of Linear Technology Corporation. U TYPICAL APPLICATIO 45MHz Single Supply Adaptive Trigger 2k ...

Page 2

LT1394 ABSOLUTE MAXIMUM + – Total Supply Voltage ( ............................... 12V Positive Supply Voltage ............................................. 7V Negative Supply Voltage .......................................... – 7V Differential Input Voltage ....................................... 12V Input and Latch Current (Note 2) ........................ ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are – 5V – 5V, V (Q) = 1.4V, V OUT LATCH SYMBOL PARAMETER V ...

Page 4

LT1394 W U TYPICAL PERFORMANCE CHARACTERISTICS Gain Characteristics 5 4 125 C OUT A 4 3.5 3.0 2 – 2.0 1.5 1.0 ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS Negative Common Mode Limit vs Temperature SINGLE 5V S –1 –2 –3 –4 – –6 –50 – 100 TEMPERATURE ( C) LT1394 G09 ...

Page 6

LT1394 W U TYPICAL PERFORMANCE CHARACTERISTICS + t Response Time to PD 5mV Overdrive 5mV + IN –95mV 2ns/DIV 2MHz 5mV PIN FUNCTIONS + V (Pin 1): ...

Page 7

U U APPLICATIONS INFORMATION Common Mode Considerations The LT1394 is specified for a common mode range of – 3. supply or a common mode range 3. single 5V supply. A ...

Page 8

LT1394 U U APPLICATIONS INFORMATION –100mV 0.1 F PULSE IN 0V –3V 50 circuit is the lack of feedthrough from the generator to the comparator input. This prevents overshoot on the com- parator input, which would give a false fast ...

Page 9

U U APPLICATIONS INFORMATION 5V 1MHz TO 10MHz 2k CRYSTAL (AT-CUT) + (a) LT1394 2k – 2k 0.068 F 10MHz TO 25MHz CRYSTAL (AT-CUT (b) LT1394 820pF 2k – 2k 200pF Figure 3. Crystal Oscillators for ...

Page 10

LT1394 U U APPLICATIONS INFORMATION MV-209 1 F VARACTOR DIODE 0.01 F 10M LT1394 390 – 0.068 F XTAL AT-CUT ANGLE * 1% FILM RESISTOR Figure 5. Temperature-Compensated 10MHz Crystal Oscillator. Temperature-Dependent Varactor Bias Reduces ...

Page 11

U U APPLICATIONS INFORMATION A1 has poorly defined DC characteristics, necessitating some form of DC correction. A2 and A3, operating at a differential gain of 100, provide this function. They differ- entially sense a band limited version of A1’s inputs ...

Page 12

LT1394 U U APPLICATIONS INFORMATION 5V DELAY PROGRAMMING VOLTAGE INPUT 300ns DELAY 0.1 F 100 LT1634 100 (DELAY 51pF CALIB) 330 330 1000pF Q3 220 TRIGGER INPUT 200ns MINIMUM PNP = ...

Page 13

U U APPLICATIONS INFORMATION Fast, High Impedance, Variable Threshold Trigger A frequent requirement in instrumentation is a fast trigger with a variable threshold. Often, a high impedance input is also required. Figure 15 meets these requirements. Com- parator C1 is ...

Page 14

LT1394 U U APPLICATIONS INFORMATION High Speed Adaptive Trigger Circuit Line and fibre-optic receivers often require an adaptive trigger to compensate for variations in signal amplitude and DC offsets. The circuit in Figure 18 triggers on 2mV to 175mV signals ...

Page 15

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Industry Standard 10ns Comparator Single Supply Version of LT1016 60ns, 450 A Single Supply Comparator Dual 4.5ns, 4mA Single Supply Comparator 14.3217MHz 14.31818MHz 14.314.0MHz INPUT VOLTAGE (V) 1394 F21 3.9k 1k* FREQUENCY OUTPUT 1394 F20 1394f LT/TP 0499 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 ...

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