LT1016
UltraFast Precision
10ns Comparator
FEATURES
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DESCRIPTIO
UltraFast
TM
(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
The LT
®
1016 is an UltraFast 10ns comparator that inter-
faces directly to TTL/CMOS logic while operating off either
±5V
or single 5V supplies. Tight offset voltage specifica-
tions 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 applications.
See the Related Parts section on the back page of the data
sheet.
APPLICATIO S
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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
, LTC and LT are registered trademarks of Linear Technology Corporation.
UltraFast is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
10MHz to 25MHz Crystal Oscillator
5V
2k
22Ω
820pF
10MHz TO 25MHz
(AT CUT)
5V
V
IN
100mV STEP
5mV OVERDRIVE
THRESHOLD
+
2k
V
+
Q
LT1016
Q
V
–
GND
LATCH
2k
1016 TA1a
–
OUTPUT
V
OUT
1V/DIV
200pF
0
U
Response Time
THRESHOLD
0
20
TIME (ns)
20
1016 TA2b
U
U
1
LT1016
ABSOLUTE
AXI U RATI GS
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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
+
1
+IN 2
–IN 3
V
–
ORDER PART
NUMBER
8
Q OUT
Q OUT
GND
LATCH
ENABLE
7
6
5
+
–
LT1016CN8
LT1016IN8
4
N8 PACKAGE
8-LEAD PDIP
T
JMAX
= 100∞C,
q
JA
= 130∞C/W (N8)
Consult LTC marketing for parts specified with wider operating temperature ranges.
2
U
U
W
W W
U
W
(Note 1)
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
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
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 110∞C,
q
JA
= 120∞C/W
LT1016
The
●
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
DV
OS
DT
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
MIN
●
●
LT1016C/I
TYP
1.0
4
0.3
0.3
5
MAX
±3
3.5
UNITS
mV
mV
mV/∞C
R
S
£
100W (Note 2)
1.0
1.3
10
13
3.5
3.5
mA
mA
mA
mA
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
mA
ns
ns
ns
ns
ns
ns
V
LATCH
= 0V
DV
IN
= 100mV, OD = 5mV
DV
IN
= 100mV, OD = 20mV
●
10
●
14
16
12
15
3
9
●
Dt
PD
Differential Propagation
Delay
Latch Setup Time
(Note 4)
DV
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
Dt
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
Dt
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:
Dt
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.
3
LT1016
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Characteristics
5.0
4.5
4.0
OUTPUT VOLTAGE (V)
T
J
= 125°C
3.5
TIME (ns)
2.5
2.0
1.5
1.0
0.5
0
– 2.5
T
J
= – 55°C
T
J
= 25°C
TIME (ns)
3.0
– 0.5
–1.5
0.5
1.5
DIFFERENTIAL INPUT VOLTAGE (mV)
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
25
TIME (ns)
TIME (ns)
TIME (ns)
0
500
2.5k
1k
1.5k
2k
SOURCE RESISTANCE (Ω)
Latch Set-Up Time vs
Temperature
6
4
2
TIME (ns)
V
S
=
±
5V
I
OUT
= 0V
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
0
–2
–4
–6
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
4
U W
V
S
=
±
5V
I
OUT
= 0
Propagation Delay vs Input
Overdrive
25
V
S
=
±5V
T
J
= 25°C
V
STEP
= 100mV
C
LOAD
= 10pF
Propagation Delay vs Load
Capacitance
25
V
S
=
±
5V
T
J
= 25°C
I
OUT
= 0
20
V
STEP
= 100mV
OVERDRIVE = 5mV
15
t
PDHL
10
t
PDLH
20
15
10
5
5
0
2.5
0
10
30
20
OVERDRIVE (mV)
40
50
1016 G02
0
0
10
30
40
20
OUTPUT LOAD CAPACITANCE (pF)
50
1016 G03
1016 G01
Propagation Delay vs Supply
Voltage
V
–
= – 5V
T
J
= 25°C
V
STEP
= 100mV
20
OVERDRIVE = 5mV
C
LOAD
= 10pF
15
FALLING EDGE t
PDHL
RISING EDGE t
PDLH
Propagation Delay vs
Temperature
30
25
20
15
FALLING OUTPUT t
PDHL
10
RISING OUTPUT t
PDLH
5
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
V
S
=
±
5V
OVERDRIVE = 5mV
STEP SIZE = 100mV
C
LOAD
= 10pF
10
5
3k
1016 G04
4.4
4.8
5.0
5.2
5.4
4.6
POSITIVE SUPPLY VOLTAGE (V)
5.6
1016 G05
125
1016 G06
Output Low Voltage (V
OL
) vs
Output Sink Current
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
T
J
= 125°C
T
J
= 25°C
T
J
= – 55°C
V
S
=
±
5V
V
IN
= 30mV
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
125
1.0
0
2
4 6 8 10 12 14 16 18 20
OUTPUT SOURCE CURRENT (mA)
1016 G09
1016 G07
LT1016
TYPICAL PERFOR A CE CHARACTERISTICS
Negative Supply Current vs
Temperature
6
5
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)
CURRENT (mA)
CURRENT (mA)
Common Mode Rejection vs
Frequency
120
110
V
S
=
±
5V
V
IN
= 2V
P-P
T
J
= 25°C
REJECTION RATIO (dB)
100
INPUT VOLTAGE (V)
90
80
70
60
50
40
10k
100k
1M
FREQUENCY (Hz)
10M
1016 G13
4
3
2
1
*SEE APPLICATION INFORMATION
FOR COMMON MODE LIMIT WITH
VARYING SUPPLY VOLTAGE.
125
INPUT VOLTAGE (V)
LATCH Pin Threshold vs
Temperature
2.6
2.2
1.8
OUTPUT LATCHED
1.4
OUTPUT UNAFFECTED
1.0
0.6
0.2
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
V
S
=
±
5V
CURRENT (µA)
VOLTAGE (V)
U W
1016 G10
Positive Supply Current vs
Positive Supply Voltage
V
–
= 0V
V
IN
= 60mV
I
OUT
= 0
Positive Supply Current vs
Switching Frequency
40
35
30
25
20
15
10
5
7
T
J
= 125°C
T
J
= 25°C
T
J
= – 55°C
30
25
20
15
10
5
0
T
J
= 125°C
T
J
= 25°C
T
J
= – 55°C
0
1
2
6
4
3
5
SUPPLY VOLTAGE (V)
8
V
S
=
±
5V
V
IN
=
±
50mV
I
OUT
= 0
1
10
SWITCHING FREQUENCY (MHz)
100
1016 G12
0
125
1016 G11
Positive Common Mode Limit vs
Temperature
6
5
V
S
=
±
5V*
2
Negative Common Mode Limit vs
Temperature
V
S
= SINGLE 5V SUPPLY
1
0
–1
–2
–3
V
S
=
±
5V*
–4
50
100
25
75
–50 –25
0
JUNCTION TEMPERATURE (°C)
*SEE APPLICATION INFORMATION
FOR COMMON MODE LIMIT WITH
VARYING SUPPLY VOLTAGE.
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
125
1016 G14
1016 G15
LATCH Pin Current* vs
Temperature
300
250
200
150
100
50
V
S
=
±
5V
V
LATCH
= 0V
*CURRENT COMES OUT OF
LATCH PIN BELOW THRESHOLD
125
125
0
50
100
–50 –25
25
75
0
JUNCTION TEMPERATURE (°C)
1016 G16
1016 G17
5
