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PDF LT1671 Data sheet ( Hoja de datos )
| Número de pieza | LT1671 | |
| Descripción | 60ns/ Low Power/ Single Supply/ Ground-Sensing Comparator | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LT1671
60ns, Low Power,
Single Supply, Ground-Sensing
Comparator
FEATURES
DESCRIPTIO
s Low Power: 450µA
s Fast: 60ns at 20mV Overdrive
85ns at 5mV Overdrive
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 LT1394, LT1016 and LT1116
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
The LT®1671 is a low power 60ns 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 LT1394, LT1016 and
LT1116, this comparator has complementary outputs
designed to interface directly to TTL or CMOS logic. The
LT1671 may operate from either a single 5V supply or dual
±5V supplies. Low offset voltage specifications and high
gain allow the LT1671 to be used in precision applications.
The LT1671 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-conduction current. Unlike other fast comparators,
the LT1671 remains stable even for slow transitions
through the active region, which eliminates the need to
specify a minimum input slew rate.
The LT1671 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
1MHz Crystal Oscillator
5V
2k
1MHz CRYSTAL
(AT-CUT)
+
LT1671
2k –
2k
0.068µF
OUTPUT
11667711TTAA0011
Propagation Delay vs Overdrive
140
VS = ±5V
120
VSTEP = 100mV
TA = 25°C
RL = 1M
100
80
FALLING EDGE (tPDHL)
60
40
20
0
RISING EDGE (tPDLH)
10 20 30 40 50
OVERDRIVE (mV)
1671 TA02
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LT1671
Negative Common Mode Limit vs
Temperature
1
RL = 1M
0
VS = SINGLE 5V SUPPLY
–1
–2
–3
–4
–5 VS = ±5V
Output Low Voltage (VOL) vs
Output Sink Current
0.8
VS = ±5V
0.7 VIN = 30mV
0.6
TA = –55°C
0.5
0.4 TA = 125°C
0.3 TA = 25°C
0.2
0.1
Output High Voltage (VOH) vs
Output Source Current
5.0
VS = ±5V
4.5 VIN = –30mV
4.0 TA = 125°C TA = 25°C
3.5
3.0 TA = –55°C
2.5
2.0
1.5
–6
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1671 G10
0
02
4 6 8 10 12 14
OUTPUT SINK CURRENT (mA)
1671 G11
1.0
0
2 4 6 8 10 12 14
OUTPUT SOURCE CURRENT (mA)
1671 G12
Positive Supply Current vs
V + Supply Voltage
0.6
V– = 0V
0.5
VIN = –60mV
IOUT = 0
0.4
0.3
TA = 125°C
0.2
TA = 25°C
TA = –55°C
0.1
Positive Supply Current vs
Switching Frequency
3.5
VS = ±5V
3.0 VSTEP = ±50mV
IOUT = 0
2.5
2.0
TA = 125°C
1.5
1.0
TA = 25°C
0.5 TA = –55°C
Negative Supply Current vs
V – Supply Voltage
100
V+ = 5V
VIN = –60mV
90 IOUT = 0
80
70 TA = 125°C
TA = 25°C
60
TA = –55°C
0
01 2 34 56 7 8
SUPPLY VOLTAGE (V)
1671 G13
0
0.1
1
SWITCHING FREQUENCY (MHz)
10
1671 G14
50
–8
–7 –6 –5 –4 –3 –2 –1 0
NEGATIVE SUPPLY VOLTAGE (V)
1671 G15
Latch Pin Current vs Temperature
1.0
VS = ±5V
0.8
0.6
Response to 15MHz
±10mV Sine Wave
+ IN
20mVP-P
10mV/DIV
3V
Q OUT
0.4 1V/DIV
0V
0.2
50ns/DIV
1671 G17
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1671 G16
5
5 Page 
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
MS8 Package
8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
0.118 ± 0.004*
(3.00 ± 0.102)
8 76 5
0.192 ± 0.004
(4.88 ± 0.10)
0.118 ± 0.004**
(3.00 ± 0.102)
1 234
0.007
(0.18)
0° – 6° TYP
0.021 ± 0.006
(0.53 ± 0.015)
0.040 ± 0.006
(1.02 ± 0.15)
SEATING
PLANE
0.012
(0.30)
REF
0.0256
(0.65)
TYP
0.034 ± 0.004
(0.86 ± 0.102)
0.006 ± 0.004
(0.15 ± 0.102)
MSOP (MS8) 1197
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
8 765
LT1671
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
1
0°– 8° TYP
0.053 – 0.069
(1.346 – 1.752)
2
0.016 – 0.050
0.406 – 1.270
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
34
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
SO8 0996
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.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1671.PDF ] | |
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