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Linear Technology Electronic Components Datasheet

LT1011 Datasheet

Voltage Comparator

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Features
n Pin Compatible with LM111 Series Devices
n Guaranteed Max 0.5mV Input Offset Voltage
n Guaranteed Max 25nA Input Bias Current
n Guaranteed Max 3nA Input Offset Current
n Guaranteed Max 250ns Response Time
n Guaranteed Min 200,000 Voltage Gain
n 50mA Output Current Source or Sink
n ±30V Differential Input Voltage
n Fully Specified for Single 5V Operation
n Available in 8-Lead PDIP and SO Packages
Applications
n SAR A/D Converters
n Voltage-to-Frequency Converters
n Precision RC Oscillator
n Peak Detector
n Motor Speed Control
n Pulse Generator
n Relay/Lamp Driver
LT1011/LT1011A
Voltage Comparator
Description
The LT®1011 is a general purpose comparator with sig-
nificantly better input characteristics than the LM111.
Although pin compatible with the LM111, it offers four
times lower bias current, six times lower offset voltage
and five times higher voltage gain. Offset voltage drift,
a previously unspecified parameter, is guaranteed at
15µV/°C. Additionally, the supply current is lower by
a factor of two with no loss in speed. The LT1011 is
several times faster than the LM111 when subjected to
large overdrive conditions. It is also fully specified for DC
parameters and response time when operating on a single
5V supply. The LT1011 retains all the versatile features of
the LM111, including single 3V to ±18V supply operation,
and a floating transistor output with 50mA source/sink
capability. It can drive loads referenced to ground, nega-
tive supply or positive supply, and is specified up to 50V
between Vand the collector output. A differential input
voltage up to the full supply voltage is allowed, even with
±18V supplies, enabling the inputs to be clamped to the
supplies with simple diode clamps.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
10µs 12-Bit A/D Converter
R1
1k
FULL-SCALE
TRIM
R2*
15V 6.49k
PARALLEL
OUTPUTS
5V
E
R3
6.98k
LM329
7V
3.9k
0.001µF
6012
12-BIT
D/A CONVERTER
AM2504
SAR REGISTER
S
D
CC
CP S
15V
–15V
*R2 AND R4
SHOULD TC TRACK
INPUT
0V TO 10V
PARALLEL
OUTPUTS
R4*
2.49k
R6
820Ω
+
LT1011A
SERIAL OUTPUT
7475
LATCH
5V
R5
1k
START
CLOCK f = 1.4MHz
1011 TA01
For more information www.linear.com/LT1011
Response Time vs Overdrive
500
450
400
350
300
250
200
150
100
50
0
0.1
FALLING
OUTPUT
RISING
OUTPUT
1 10
OVERDRIVE (mV)
100
1011 TA02
1011afe
1


Linear Technology Electronic Components Datasheet

LT1011 Datasheet

Voltage Comparator

No Preview Available !

LT1011/LT1011A
Absolute Maximum Ratings
(Note 1)
Supply Voltage (Pin 8 to Pin 4)..................................36V
Output to Negative Supply (Pin 7 to Pin 4)
LT1011AC, LT1011C................................................40V
LT1011AI, LT1011I..................................................40V
LT1011AM, LT1011M (OBSOLETE)........................50V
Ground to Negative Supply (Pin 1 to Pin 4)...............30V
Differential Input Voltage.........................................±36V
Voltage at STROBE Pin (Pin 6 to Pin 8)........................5V
Input Voltage (Note 2)...........................Equal to Supplies
Output Short-Circuit Duration................................10 sec
Operating Temperature Range (Note 3)
LT1011AC, LT1011C................................... 0°C to 70°C
LT1011AI, LT1011I.................................–40°C to 85°C
LT1011AM, LT1011M (OBSOLETE)..... –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
TOP VIEW
V+
8
GND 1
7 OUTPUT
INPUT+ 2
+
6
BALANCE/
STROBE
INPUT 3
5 BALANCE
4
V
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
OBSOLETE PACKAGE
Consider the N8 or S8 Packages for Alternate Source
GND
INPUT+
INPUT
V
1
2
3
4
TOP VIEW
+
8 V+
7 OUTPUT
6
BALANCE/
STROBE
5 BALANCE
N8 PACKAGE
S8 PACKAGE
8-LEAD PDIP 8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/W(N8)
TJMAX = 150°C, θJA = 150°C/W(S8)
1011afe
2 For more information www.linear.com/LT1011


Part Number LT1011
Description Voltage Comparator
Maker Linear Technology
Total Page 20 Pages
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