LT1016
UltraFast Precision
10ns Comparator
FeaTures
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DescripTion
The LT
®
1016 is an UltraFast 10ns comparator that interfaces
directly to TTL/CMOS logic while operating off either ±5V
or single 5V supplies. Tight offset voltage specifications
and high gain allow the LT1016 to be used in precision
applications. Matched complementary outputs further
extend the versatility of this comparator.
A unique output stage provides active drive in both direc-
tions for maximum speed into TTL/CMOS logic or passive
loads, yet does not exhibit the large current spikes found
in conventional output stages. This allows the LT1016 to
remain stable with the outputs in the active region which,
greatly reduces the problem of output “glitching” when
the input signal is slow moving or is low level.
The LT1016 has a LATCH pin which will retain input data
at the outputs, when held high. Quiescent negative power
supply current is only 3mA. This allows the negative supply
pin to be driven from virtually any supply voltage with a
simple resistive divider. Device performance is not affected
by variations in negative supply voltage.
Linear Technology offers a wide range of comparators
in addition to the LT1016 that address different applica-
tions. See the Related Parts section on the back page of
the data sheet.
UltraFast™ (10ns typ)
Operates Off Single 5V Supply or ±5V
Complementary Output to TTL
Low Offset Voltage
No Minimum Input Slew Rate Requirement
No Power Supply Current Spiking
Output Latch Capability
applicaTions
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■
■
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■
■
■
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High Speed A/D Converters
High Speed Sampling Circuits
Line Receivers
Extended Range V-to-F Converters
Fast Pulse Height/Width Discriminators
Zero-Crossing Detectors
Current Sense for Switching Regulators
High Speed Triggers
Crystal Oscillators
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Typical applicaTion
10MHz to 25MHz Crystal Oscillator
5V
2k
22
820pF
10MHz TO 25MHz
(AT CUT)
5V
V
IN
100mV STEP
5mV OVERDRIVE
Response Time
THRESHOLD
THRESHOLD
+
2k
V
+
LT1016
Q
Q
OUTPUT
V
OUT
1V/DIV
–
V
–
200pF
GND
LATCH
2k
1016 TA1a
0
0
20
TIME (ns)
20
1016 TA2b
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LT1016
absoluTe MaxiMuM raTings
(Note 1)
Positive Supply Voltage (Note 5) ................................7V
Negative Supply Voltage .............................................7V
Differential Input Voltage (Note 7) ........................... ±5V
+IN, –IN and LATCH ENABLE Current (Note 7) .... ±10mA
Output Current (Continuous) (Note 7) ................. ±20mA
Operating Temperature Range
LT1016I ................................................–40°C to 85°C
LT1016C ................................................... 0°C to 70°C
Storage Temperature Range ..................– 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
pin conFiguraTion
TOP VIEW
V
+
1
+IN 2
–IN 3
V
–
ORDER PART
NUMBER
8
Q
OUT
Q OUT
GND
LATCH
ENABLE
7
6
5
TOP VIEW
V
+
1
+IN 2
– IN 3
V
–
4
+
–
8
7
6
5
Q
OUT
Q OUT
GND
LATCH
ENABLE
ORDER PART
NUMBER
LT1016CS8
LT1016IS8
S8 PART
MARKING
1016
1016I
+
–
LT1016CN8
LT1016IN8
4
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 110°C,
θ
JA
= 120°C/W
T
JMAX
= 100°C,
θ
JA
= 130°C/W (N8)
Consult LTC marketing for parts specified with wider operating temperature ranges.
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1016fc
LT1016
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 5V, V
–
= 5V, V
OUT
(Q) = 1.4V, V
LATCH
= 0V, unless otherwise noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range
CMRR
PSRR
Common Mode Rejection
Supply Voltage Rejection
(Note 2)
●
elecTrical characTerisTics
CONDITIONS
R
S
≤ 100Ω (Note 2)
●
●
MIN
LT1016C/I
TYP
1.0
4
0.3
0.3
5
MAX
±3
3.5
1.0
1.3
10
13
3.5
3.5
UNITS
mV
mV
µV/°C
µA
µA
µA
µA
V
V
dB
dB
dB
dB
V/V
V
V
(Note 3)
●
(Note 6)
Single 5V Supply
–3.75V ≤ V
CM
≤ 3.5V
Positive Supply 4.6V ≤ V
+
≤ 5.4V
LT1016C
Positive Supply 4.6V ≤ V
+
≤ 5.4V
LT1016I
Negative Supply 2V ≤ V
–
≤ 7V
●
●
●
●
●
●
–3.75
1.25
80
60
54
80
1400
2.7
2.4
96
75
75
100
3000
3.4
3.0
0.3
0.4
25
3
2.0
A
V
V
OH
V
OL
I
+
I
–
V
IH
V
IL
I
IL
t
PD
Small-Signal Voltage Gain
Output High Voltage
Output Low Voltage
Positive Supply Current
Negative Supply Current
LATCH Pin Hi Input Voltage
LATCH Pin Lo Input Voltage
LATCH Pin Current
Propagation Delay (Note 4)
1V ≤ V
OUT
≤ 2V
V
+
≥ 4.6V
I
OUT
=1mA
I
OUT
= 10mA
I
SINK
= 4mA
I
SINK
= 10mA
●
●
●
●
●
●
●
0.5
35
5
0.8
500
V
V
mA
mA
V
V
µA
ns
ns
ns
ns
ns
ns
V
LATCH
= 0V
∆V
IN
= 100mV, OD = 5mV
∆V
IN
= 100mV, OD = 20mV
●
10
●
14
16
12
15
3
9
●
∆t
PD
Differential Propagation Delay
Latch Setup Time
(Note 4) ∆V
IN
= 100mV,
OD = 5mV
2
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Input offset voltage is defined as the average of the two voltages
measured by forcing first one output, then the other to 1.4V. Input offset
current is defined in the same way.
Note 3:
Input bias current (I
B
) is defined as the average of the two input
currents.
Note 4:
t
PD
and ∆t
PD
cannot be measured in automatic handling equipment
with low values of overdrive. The LT1016 is sample tested with a 1V step
and 500mV overdrive. Correlation tests have shown that t
PD
and ∆t
PD
limits shown can be guaranteed with this test if additional DC tests are
performed to guarantee that all internal bias conditions are correct. For low
overdrive conditions V
OS
is added to overdrive. Differential propogation
delay is defined as: ∆t
PD
= t
PDLH
– t
PDHL
Note 5:
Electrical specifications apply only up to 5.4V.
Note 6:
Input voltage range is guaranteed in part by CMRR testing and
in part by design and characterization. See text for discussion of input
voltage range for supplies other than ±5V or 5V.
Note 7:
This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
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LT1016
Typical perForMance characTerisTics
Gain Characteristics
5.0
4.5
4.0
OUTPUT VOLTAGE (V)
3.5
TIME (ns)
T
J
= 25°C
TIME (ns)
3.0
2.5
2.0
1.5
1.0
0.5
0
– 2.5
– 0.5
–1.5
0.5
1.5
DIFFERENTIAL INPUT VOLTAGE (mV)
2.5
0
0
10
30
20
OVERDRIVE (mV)
40
50
1016 G02
Propagation Delay vs Input
Overdrive
V
S
= ±5V
I
OUT
= 0
25
V
S
= ±5V
T
J
= 25°C
V
STEP
= 100mV
C
LOAD
= 10pF
25
Propagation Delay vs Load
Capacitance
V
S
= ±5V
T
J
= 25°C
I
OUT
= 0
20 V
STEP
= 100mV
OVERDRIVE = 5mV
15
t
PDHL
10
t
PDLH
T
J
= 125°C
20
15
10
T
J
= – 55°C
5
5
0
0
10
30
40
20
OUTPUT LOAD CAPACITANCE (pF)
50
1016 G03
1016 G01
Propagation Delay vs Source
Resistance
80
V
S
= ±5V
T
J
= 25°C
70
OVERDRIVE = 20mV
EQUIVALENT INPUT
60 CAPACITANCE IS ≈ 3.5pF
C
LOAD
= 10pF
50
STEP SIZE = 800mV
400mV
40
200mV
100mV
30
20
10
0
0
500
2.5k
1k
1.5k
2k
SOURCE RESISTANCE ( )
3k
1016 G04
Propagation Delay vs Supply
Voltage
25
V
–
= –5V
T
J
= 25°C
V
STEP
= 100mV
20 OVERDRIVE = 5mV
C
LOAD
= 10pF
TIME (ns)
TIME (ns)
15
FALLING EDGE t
PDHL
RISING EDGE t
PDLH
30
25
20
15
10
5
Propagation Delay vs
Temperature
V
S
= ±5V
OVERDRIVE = 5mV
STEP SIZE = 100mV
C
LOAD
= 10pF
TIME (ns)
10
FALLING OUTPUT t
PDHL
RISING OUTPUT t
PDLH
5
0
4.4
4.8
5.0
5.2
5.4
4.6
POSITIVE SUPPLY VOLTAGE (V)
5.6
1016 G05
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
125
1016 G06
Latch Set-Up Time vs
Temperature
6
4
2
TIME (ns)
0
–2
–4
–6
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
V
S
= ±5V
I
OUT
= 0V
OUTPUT VOLTAGE (V)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
125
0
Output Low Voltage (V
OL
) vs
Output Sink Current
V
S
= ±5V
V
IN
= 30mV
OUTPUT VOLTAGE (V)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
0
2
4 6 8 10 12 14 16 18 20
OUTPUT SINK CURRENT (mA)
1016 G08
Output High Voltage (V
OH
) vs
Output Source Current
V
S
= ±5V
V
IN
= – 30mV
T
J
= 125°C
T
J
= 25°C
T
J
= – 55°C
T
J
= – 55°C
T
J
= 25°C
T
J
= 125°C
1.0
0
2
4 6 8 10 12 14 16 18 20
OUTPUT SOURCE CURRENT (mA)
1016 G09
1016 G07
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LT1016
Typical perForMance characTerisTics
Negative Supply Current vs
Temperature
6
5
CURRENT (mA)
4
3
2
1
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
V
S
= ±5V
I
OUT
= 0
50
45
40
35
CURRENT (mA)
30
25
20
15
10
5
125
0
0
1
2
T
J
= 125°C
T
J
= 25°C
Positive Supply Current vs
Positive Supply Voltage
V
–
= 0V
V
IN
= 60mV
I
OUT
= 0
CURRENT (mA)
40
35
30
25
20
15
10
5
7
8
0
Positive Supply Current vs
Switching Frequency
T
J
= 125°C
T
J
= 25°C
T
J
= – 55°C
T
J
= – 55°C
6
4
3
5
SUPPLY VOLTAGE (V)
V
S
= 5V
V
IN
= 50mV
I
OUT
= 0
1
10
SWITCHING FREQUENCY (MHz)
100
1016 G12
1016 G10
1016 G11
Common Mode Rejection vs
Frequency
120
110
REJECTION RATIO (dB)
100
90
80
70
60
50
40
10k
100k
1M
FREQUENCY (Hz)
10M
1016 G13
Positive Common Mode Limit vs
Temperature
6
5
INPUT VOLTAGE (V)
4
3
2
1
*SEE APPLICATION INFORMATION
FOR COMMON MODE LIMIT WITH
VARYING SUPPLY VOLTAGE.
125
INPUT VOLTAGE (V)
V
S
= ±5V*
2
1
0
–1
–2
–3
Negative Common Mode Limit vs
Temperature
V
S
= SINGLE 5V SUPPLY
V
S
= ±5V
V
IN
= 2V
P-P
T
J
= 25°C
*SEE APPLICATION INFORMATION
FOR COMMON MODE LIMIT WITH
VARYING SUPPLY VOLTAGE.
V
S
= ±5V*
–4
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
125
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
1016 G14
1016 G15
LATCH Pin Threshold vs
Temperature
2.6
2.2
1.8
1.4
1.0
0.6
0.2
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
OUTPUT LATCHED
OUTPUT UNAFFECTED
V
S
= ±5V
300
250
200
150
100
50
LATCH Pin Current* vs
Temperature
V
S
= ±5V
V
LATCH
= 0V
VOLTAGE (V)
CURRENT (A)
125
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
*CURRENT COMES OUT OF
LATCH PIN BELOW THRESHOLD
125
1016 G16
1016 G17
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