LT1116CN8#TRPBF [Linear]
IC COMPARATOR, 3500 uV OFFSET-MAX, 12 ns RESPONSE TIME, PDIP8, 0.300 INCH, LEAD FREE, PLASTIC, DIP-8, Comparator;
| 型号： | LT1116CN8#TRPBF |
| 厂家： | 
Linear |
| 描述： | IC COMPARATOR, 3500 uV OFFSET-MAX, 12 ns RESPONSE TIME, PDIP8, 0.300 INCH, LEAD FREE, PLASTIC, DIP-8, Comparator 放大器 光电二极管 |
| 文件： | 总8页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1116
12ns, Single Supply
Ground-Sensing Comparator
U
FEATURES
DESCRIPTIO
The LT®1116 is an ultra fast (12ns) comparator designed
for sensing signals near the negative supply. The input
common mode range extends from 2.5V below the
positive supply down to the negative supply rail. Like the
LT1016, this comparator is specifically designed to
interface directly to TTL logic with complementary
outputs. The comparator may operate from either a single
5V supply or dual ±5V supplies. Tight offset voltage
specifications and high gain allow the LT1116 to be used
in precision applications.
■
Ultra Fast (12ns Typ)
■
Operates off Single 5V Supply or ±5V
■
Input Common Mode Extends to Negative Supply
No Minimum Input Slew Rate Requirement
Complementary TTL Output
Inputs Can Exceed the Positive Supply Up to 15V
without Damaging the Comparator
Low Offset Voltage
Pin-Compatible with LT1016
Output Latch Capability
Available in 8-Lead PDIP and SO Packages
■
■
■
■
■
■
■
The LT1116 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 logic or passive loads, yet it has minimal
cross-conduction current. Unlike other fast comparators,
the LT1116 remains stable even for slow transitions
through the active region, which eliminates the need to
specify a minimum input slew rate.
U
APPLICATIO S
■
High Speed A/D Converters
■
Zero Crossing Detectors
■
Current Sense for Switching Regulators
■
Extended Range V to F Converters
■
Fast Pulse Height/Width Discriminators
The LT1116 has an internal, TTL 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.
■
High Speed Triggers
Line Receivers
High Speed Sampling Circuits
■
■
, LTC, LT and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
TYPICAL APPLICATIO
Comparator Response Time
Fast Current Comparator for
Current Mode Switching Regulator
THRESHOLD
LOGIC
DRIVER
M1
5V
12ns
Q
+
LT1116
C1
R
SENSE
–
–
Q
12ns
R1
0
0
20
TIME (ns)
20
CONTROL INPUT
BLANKING
LT1116 • TA01
LT1116 • TA02
1116fb
1
LT1116
W W U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
TOP VIEW
TOP VIEW
Supply Voltage (V+) to GND ...................................... 7V
Negative Supply Voltage (V–) ......................–7V to GND
Voltage
Differential Input Voltage ................................... ±15V
Inputs Voltage (Either Input) ......... (V–) –0.3V to 15V
Latch Pin Voltage ........................... Equal to Supplies
Output Current (Continuous) ..............................± 20mA
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
–
–
+
+
V
1
2
3
4
8
7
6
5
Q OUT
V
1
2
3
4
8
7
6
5
Q OUT
Q OUT
GND
+IN
–IN
Q OUT
GND
+IN
–IN
+
–
+
–
–
–
LATCH
ENABLE
LATCH
ENABLE
V
V
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
T
= 100°C, θ = 130°C/W
T
= 100°C, θ = 160°C/W
JMAX
JA
JMAX
JA
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1116CN8
LT1116CS8
S8 PART MARKING
1116
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
Voltage Gain are valid for single supply operation, V = 5V, V = 0V, unless noted.
The
●
denotes the specifications which apply over full operating temperature
+
–
range, otherwise specifications are at T = 25°C. V = 5V, V = 5V, V
(Q) = 1.4V, LATCH = 0V. Specifications for V , I , CMRR, and
OS B
A
OUT
+
–
SYMBOL
PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
R ≤ 100Ω (Note 2)
S
1.0
± 3.0
3.5
mV
mV
OS
●
●
∆V
∆T
Input Offset Voltage Drift
5
µV/°C
OS
I
Input Offset Current
(Note 2)
(Note 3)
●
●
0.5
10
2
µA
µA
OS
l
Input Bias Current, Sourcing
Input Voltage Range
20
B
–
+
Arbitrary Supply Range
Single 5V Supply
●
●
V
(V ) –2.5
2.5
V
V
0
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
–5V ≤ V ≤ 2.5V, V = ±5V
●
●
75
65
90
90
dB
dB
CM
S
0V ≤ V ≤ 2.5V
CM
+
Positive Supply, 4.6V ≤ V ≤ 5.4V
●
●
60
80
75
100
dB
dB
–
Negative Supply, –7 ≤ V ≤ –2V
A
Small Signal Voltage Gain
Positive Supply Current
Negative Supply Current
Output High Voltage
1V ≤ V
≤ 2V
OUT
1400
3000
27
V/V
mA
mA
V
+
I
I
●
●
38
7
–
5
V
I
I
= 1mA
= 10mA
●
●
2.7
2.4
3.4
3.0
V
V
OH
OL
SOURCE
SOURCE
V
Output Low Voltage
l
I
= 4mA
= 10mA
●
0.3
0.4
0.5
V
V
SINK
SINK
1116fb
2
LT1116
ELECTRICAL CHARACTERISTICS
The
●
denotes the specifications which apply over full operating temperature
+
+
range, otherwise specifications are at T = 25°C. V = 5V, V = –5V, V
= (Q) = I .4V, LATCH = 0V, unless noted.
OUT
A
SYMBOL
PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
+ Positive Latch Threshold
– Latch Threshold
●
●
●
2.0
V
V
IH
IL
0.8
I
t
Latch Input Current
Propagation Delay
V
= 0V
LATCH
–20
12
–500
µA
IL
∆V = 100mV, OD = 5mV (Note 4)
16
18
ns
ns
PD
IN
●
●
t
Propagation Delay
∆V = 100mV, OD = 20mV (Note 4)
10
14
16
ns
ns
PD
IN
∆t
Differential Propagation Delay
Latch Set-Up Time
∆V = 100mV, OD = 5mV (Note 4)
3
ns
ns
ns
PD
IN
t
t
(Note 5)
(Note 5)
2
2
SU
Latch Hold Time
H
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
reliabilty and lifetime.
Note 2: Input offset voltage is defined as the average of two offset
voltages measured by forcing first the Q output to 1.4V then forcing
the Q output to 1.4V.
Note 4: t and ∆t cannot be measured in automatic handling
PD PD
equipment with low values of overdrive. The LT1116 is sample tested with
a 1V step and 500mV overdrive. Correlation tests have shown that t and
PD
∆t can be guaranteed with this test if additional DC tests are performed
PD
to verify internal bias conditions are correct. For low overdrive conditions
V
is added to the measured overdrive.
OS
Note 5: Input latch set-up time, t , is the interval in which the input signal
SU
must be stable prior to asserting the latch signal. The hold time,
Note 3: Input bias current is defined as the average of the two input
currents.
t , is the interval after the latch is asserted in which the input signal must
H
be stable.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Propagation Delay
vs Load Capacitance
Gain CharacteristIcs
Propagation Delay vs Overdrive
25
20
15
10
5
20
18
16
14
12
10
8
5.0
4.5
4.0
3.5
3.0
2.5
2.0
T
= 25°C
STEP = 100mV, OVERDRIVE = 5mV
V
OUT
= ±5V
J
S
STEP SIZE = 100mV
I
= 0
T = 125°C
J
t
PDHL
T = 25°C
J
t
PDLH
t
PDLH
T = –55°C
J
t
PDHL
1.5
1.0
0.5
6
4
2
0
0
0
0
10
20
30
40
50
0
10
20
30
40
50
–2.5
–1.5
– 0.5 0 0.5
1.5
2.5
OVERDRIVE VOLTAGE (mV)
OUTPUT LOAD CAPACITANCE (pF)
DIFFERENTIAL INPUT VOLTAGE (mV)
LT1116 • TPC01
LT1116 • TPC02
LT1116 • TPC03
1116fb
3
LT1116
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Propagation Delay
vs Source Resistance
Propagation Delay
vs Temperature
Propagation Delay
vs Positive Supply
25
20
15
10
30
25
80
70
60
50
STEP = 100mV
V
= ±5V, OVERDRIVE = 20mV
S
OVERDRIVE = 5mV
C
V
= 10pF
LOAD
S
= ±5V
STEP SIZE = 800mV
400mV
20
t
PDHL
RISING OUTPUT
t
PDHL
15
10
40
30
t
PDLH
200mV
FALLING OUTPUT
t
PDLH
20
10
0
STEP SIZE = 100mV
5
0
5
0
0.5
1.0
2.0
4.4
4.8
5.0
5.2
5.4
5.6
0
2.5
3.0
4.6
90
110 130
1.5
–50 –30 –10 10 30 50 70
POWER SUPPLY VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
SOURCE RESISTANCE (kΩ)
LT1116 • TPC04
LT1116 • TPC06
LT1116 • TPC05
Common Mode Rejection
Output High Voltage (V )
OH
Latch Set-Up Time
120
110
100
90
6
4
2
0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
V
V
J
= 2V
P-P
IN
S
= ±5V
T = 25°C
T = 125°C
J
T = 25°C
J
80
T = –55°C
J
70
–2
–4
–6
60
50
40
10k
100k
1M
10M
–50
25
50
75
100 125
–25
0
0
2
4
6
8
10 12 14 16 18 20
JUNCTION TEMPERATURE (°C)
FREQUENCY (Hz)
OUTPUT SOURCE CURRENT (mA)
LT1116 • TPC09
LT1116 • TPC07
LT1116 • TPC08
Output Low Voltage (V
)
Supply Current vs Temperature
Positive Supply Current
OL
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
60
50
40
30
20
10
0
35
30
–
V
= 0
V
= ±5V, V = 30mV
IN
S
POSITIVE SUPPLY CURRENT
25
T
= –55°C
= 25°C
J
20
15
10
5
T
J
T
= 25°C
T
= 125°C
J
J
T
= 125°C
J
NEGATIVE SUPPLY CURRENT
T
= –55°C
J
0
6
0
2
4
8
0
2
4
6
8
10 12 14 16 18 20
–60
0
80
140
100 120
–40 –20
20 40 60
POSITIVE SUPPLY VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
OUTPUT SINK CURRENT (mA)
LT1116 • TPC10
LT1116 • TPC11
LT1116 • TPC12
1116fb
4
LT1116
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Positive Supply Current
Input Bias Current
Positive Common Mode Limit
5
4
3
10
0
50
45
40
35
30
25
20
15
10
5
T = 25°C
V = ± 5V
S
J
S
V
= ± 5V
T = 125°C
J
T = 25°C
J
–10
T = –55°C
J
2
1
0
–20
–30
–40
0
–60 –40 –20
0
20 40 60 80 100 120 140
1
10
SWITCHING FREQUENCY (MHz)
100
–6
–4
–2
0
2
4
JUNCTION TEMPERATURE (°C)
INPUT VOLTAGE (V)
LT1116 • TPC15
LT1116 • TPC13
LT1116 • TPC14
Negative Common Mode Limit
Latch Pin Threshold
Latch Pin Current*
2.6
2.2
1.8
1.4
300
250
200
150
0
V
= ± 5V
S
V
= 5V, OV
S
–1
–2
–3
OUTPUT LATCHED
1.0
0.6
0.2
–4
–5
–6
100
50
0
OUTPUT UNAFFECTED
*CURRENT COMES OUT OF LATCH PIN
BELOW THRESHOLD
V
= ± 5V
S
50
100 125
–50 –25
0
25
75
–60 –40 –20
0
20 40 60 80 100 120 140
50
100 125
–50 –25
0
25
75
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
LT1116 • TPC17
LT1116 • TPC16
LT1116 • TPC18
W U
W
TI I G DIAGRA S
V
OD
LATCH
ENABLE
t
t
H
SU
∆V
V
IN
IN
V
IN
t
PD
t
PD
V
OUT
V
OUT
LT1116 • TD01
LT1116 • TD02
1116fb
5
LT1116
W U U
U
APPLICATIO S I FOR ATIO
Common Mode Considerations
Single ended input resistance is about 5MΩ, and remains
roughlyconstantovertheinputcommonmoderange. The
common mode resistance is about 2.5MΩ with zero
differential input voltage, and does not change
significantly with the absolute value of differential input.
The LT1116 is specified for a common mode range of 0V
to 2.5V with a single 5V supply, and –5V to 2.5V with ±5V
supplies. The common mode range is defined as the DC
input for which the output responds correctly to small
changes in the input differential. Input signals can exceed
the positive common mode limit up to the 15V absolute
maximumratingwithoutdamagingthecomparator.There
will, however, be an increase in propagation delay of up to
10ns when the input signal switches back into the
common mode range. When input signals fall below the
negativecommonmodelimit,theinternalPNdiodeformed
with the substrate can turn on (resulting in significant
charge flow throughout the die). A Schottky clamp diode,
between the input and the negative rail, speeds up recov-
ery from negative overdrive by preventing the substrate
diode from turning on. The zero crossing detector in
Figure 1 demonstrates the use of a fast clamp diode.
Recovery, from500mVoverdrivebelowV–, forthiscircuit
is approximately 18ns.
Effectiveinputcapacitance,typically5pF,isdeterminedby
measuring the resulting change in propagation delay for a
1kΩ change in source resistance.
Latch Pin Dynamics
The internal latch uses local regenerative feedback to
shorten set-up and hold times. Driving the latch pin high
retains the output state. The latch pin floats to a high state
when disconnected, so it must be driven low for
flow-through operation. The set-up time required to
guarantee detecting a given transition of the inputs is 2ns.
The inputs must also remain stable for a 2ns hold time
after latch is asserted. New data will appear at the output
approximately 10ns to 12ns after the latch goes low. The
latch pin has no built-in hysteresis, and is designed to be
driven from TTL or CMOS logic gates.
Input Characteristics
Additional Information
Each input to the LT1116 is buffered with a fast PNP
follower—input bias current therefore does not vary
significantly throughout the common mode range. When
either input exceeds the positive common mode limit, the
bias current drops to zero. Inputs that fall more than one
diode and drop below V– will forward bias the substrate or
clamp diode, causing large input current to flow.
Linear Technology’s Application Note 13 provides an
extensive discussion of design techniques for high speed
comparators.
Single Supply Crystal Oscillator 10MHZ to 15MHz
10 TO 15MHz
AT CUT
1kΩ
5V
Fast Zero Crossing Detector
5V
5V
Q
R
S
CABLE
+
50Ω
+
Q
V
IN
LT1116
R
T
LT1116
1N5712
1kΩ
OUTPUT
–
50Ω
–
–
Q
Q
–
24pF
2kΩ
LT1116 • AI01
LT1116 • AI02
Figure 1. The Zero Crossing Detector Terminates the
Transmission Line At Its 50Ω Characteristic Impedance. Negative
Inputs Should Not Fall Below –2V to keep the Signal Current
Within the Clamp Diode’s Maximum Forward Rating. Positive
Inputs Should not Exceed the Devices Absolute Maximum Ratings
nor the Power Rating on the Terminating Resistor
Figure 2. This Single Supply Crystal Oscillator Utilizes Crystals
From 10MHz To 15MHz Without Component Changes
1116fb
6
LT1116
W U U
APPLICATIO S I FOR ATIO
U
High Speed Adaptive Trigger Circuit
Line receivers often require an adaptive trigger to
compensate for variations in signal amplitude and DC
offsets. The circuit in Figure 3 triggers on 2mV to 200mV
signals from 100Hz to 10MHz from a single 5V rail. The
triggerlevelistheaverageoftheinputsignal’spositiveand
negative peaks stored on 0.005µF capacitors. Pairs of
NPN and PNP transistors are used instead of diodes to
temperature compensate the peak detector.
To achieve single supply operation, the input signal must
be shifted into the pre-amplifier’s common mode range.
The input amplifier A1 adds a 1V level shift, while A2
provides a gain of 20 for high frequency signals.
Capacitors C1 and C2 insure that low frequency signals
see unity gain. Bandwidth limiting in A1 and A2 does not
affect triggering because the adaptive trigger threshold
varies ratiometrically to maintain circuit output.
5pF
5V
3kΩ
1%
1kΩ
5V
CABLE
1kΩ
5V
V
IN
–
5V
A1
LT1191
4R
200Ω
0.005µF
+
500pF
3MΩ
3MΩ
200Ω
A2
LT1192
5V
+
+
A3
LT1006
–
0.005µF
–
R
100Ω
47µF
1000pF
1kΩ
50Ω
3kΩ
1%
500Ω
5V
C1
100µF
C2
0.1µF
0.1µF
+
Q
NPN = 2N3904
PNP = 2N3906
LT1116
–
Q
–
TRIGGER
OUT
LT1116 • AI03
Figure 3. Fast Single Supply Adaptive Trigger
1116fb
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
LT1116
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 0.005
(3.302 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
8
1
7
6
5
4
0.065
(1.651)
TYP
0.255 0.015*
(6.477 0.381)
0.009 – 0.015
(0.229 – 0.381)
0.125
0.020
(0.508)
MIN
(3.175)
MIN
+0.035
–0.015
2
3
0.325
0.018 0.003
0.100
(2.54)
BSC
N8 1098
+0.889
8.255
(0.457 0.076)
(
)
–0.381
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 1298
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
3
4
2
RELATED PARTS
PART NUMBER
LT1016
DESCRIPTION
COMMENTS
10ns Precision Comparator
7ns Single Supply Comparator
60ns Single Supply Comparator
7ns Single/Dual Comparator
4ns Dual Comparator
Complementary Outputs with Latch, LT1116 Pinout
6mA, 100MHz Toggle Rate, LT1116 Pinout
LT1394
LT1671
450µA, 0.8mV Offset, LT1116 Pinout
LT1713/LT1714
LT1715
Rail-to-Rail Input and Output, 2.7V to + 5.5V Operation
Independent Input/Output Supplies, 150MHz Toggle Rate
Independent Input/Output Supplies, 3V/5V
LT1719
4.5ns Single Supply Comparator
4.5ns Dual/Quad Comparator
LT1720/LT1721
4mA per Comparator, Input 100mV Below V –, 3V/5V
1116fb
LT 0306 REV B • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
8
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
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