el5281 Intersil Corporation, el5281 Datasheet

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el5281

Manufacturer Part Number
el5281
Description
Dual 8ns High-speed Comparator
Manufacturer
Intersil Corporation
Datasheet
Dual 8ns High-Speed Comparator
between V
operate from 0.1V below ground for use in ground-sensing
applications.
The output side of the comparator can be supplied from a
single supply of 2.7V to 5V. The rail-to-rail output swing
enables direct connection of the comparator to both CMOS
and TTL logic circuits.
The latch input of the EL5281 can be used to hold the
comparator output value by applying a low logic level to the
pin. The EL5281 features two separate comparators.
The EL5281 is available in the 14-pin SO package and is
specified for operation over the full -40°C to +85°C
temperature range. Also available are a single (EL5181) and
quad versions (EL5481 and EL5482).
Pinout
S
+ and V
INA+
INB+
INA-
INB-
VS+
VS-
NC
S
-. For single supplies, the inputs can
The EL5281 comparator is designed
for operation in single supply and dual
supply applications with 5V to 12V
1
2
3
4
5
6
7
(14-PIN SO)
TOP VIEW
®
EL5281
+
+
-
-
1
Data Sheet
14
13
12
11
10
9
8
VSD
OUTA
LATCHA
NC
LATCHB
OUTB
GND
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• 8ns Typ. Propagation Delay
• 5V to 12V Input Supply
• +2.7V to +5V Output Supply
• True-to-ground Input
• Rail-to-rail Outputs
• Active Low Latch
• Single Available (EL5181)
• Quad Available (EL5481 & EL5482)
• Pin-compatible 4ns Family Available (EL5x85, EL5287 &
Applications
• Threshold Detection
• High Speed Sampling Circuits
• High Speed Triggers
• Line Receivers
• PWM Circuits
• High Speed V/F Converters
Ordering Information
PART NUMBER
EL5281CS
EL5281CS-T7
EL5281CS-T13
EL5486)
All other trademarks mentioned are the property of their respective owners.
June 14, 2001
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
PACKAGE
14-Pin SO
14-Pin SO
14-Pin SO
TAPE & REEL
13”
7”
-
EL5281
PKG. NO.
MDP0027
MDP0027
MDP0027
FN7188

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el5281 Summary of contents

Page 1

... The rail-to-rail output swing enables direct connection of the comparator to both CMOS and TTL logic circuits. The latch input of the EL5281 can be used to hold the comparator output value by applying a low logic level to the pin. The EL5281 features two separate comparators. ...

Page 2

... D t Minimum Setup Time S t Minimum Hold Time H t (D) Minimum Latch Disable Pulse Width PW 2 EL5281 = 25° C) Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +15 0°C Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C -) -0.2V] to [(V +) +0.2V] Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 125° -0.2V] to [(V +) +0.2V] Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves S ) +0.2V] ...

Page 3

... Temperature (°C) Positive Supply Current vs Supply Voltage 7 V -=- = =50mV IN T =25° Input Bias Current vs Temperature -50 -30 -10 Temperature (°C) 3 EL5281 -4.4 -4.5 -4.6 -4.7 -4.8 -4.9 -5 -5.1 -5 5.5 5 4 (V) S 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0 ...

Page 4

... Step IN V =50mV =2.2k: L 8.5 8 7.5 7 6 4.5 Propagation Delay vs Overdrive 11 V =±5V S 10 =2.2k =5V Step IN 9.5 9 8 EL5281 (Continued 300 400 500 600 0 V (mV 9 ±V (V) S ...

Page 5

... A 0. Load Current (mA) Digital Supply Current vs Input Switching Frequency 30 VS=± Frequency (MHz) Output with 30MHz Input V = EL5281 (Continued) 4.75 4.7 =85°C A 4.65 4.6 4.55 4.5 4.45 =-40°C 4.4 V =± =5V SD 4.35 V =-50mV IN 4 0.9 0.8 0.7 0.6 0.5 =5V 0.4 0 ...

Page 6

... Minimum Hold Time - The minimum time after the negative transition of the latch signal that an input signal must remain H unchanged in order to be acquired and held at the output t (D) Minimum Latch Disable Pulse Width - The minimum time that the latch signal must remain high in order to acquire and hold an PW input signal change 6 EL5281 Compare Compare Latch ...

Page 7

... S comparator. Input Voltage Considerations The EL5281 input range is specified from 0.1V below V 2.25V below V output still responds correctly to a small differential input signal. The differential input stage is a pair of PNP transistors, therefore, the input bias current flows out of the ...

Page 8

... Latch Pin Dynamics The EL5281 contains a “transparent” latch for each channel. The latch pin is designed to be driven with either a TTL or CMOS output. When the latch is connected to a logic high level or left floating, the comparator is transparent and immediately responds to the changes at the input terminals ...

Page 9

... Resistors average voltage based on the output. The crystal's path provides resonant positive feedback and stable oscillation occurs. Although the EL5281 will give the correct logic output when an input is outside the common mode range, additional delays may occur when operated ...

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