LT1011 Linear Technology, LT1011 Datasheet
LT1011
Manufacturer Part Number
LT1011
Description
Voltage Comparator
Manufacturer
Linear Technology
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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pin Compatible with LM111 Series Devices
Guaranteed
Guaranteed
Guaranteed
Guaranteed
Guaranteed
50mA Output Current Source or Sink
Fully Specified for Single 5V Operation
SAR A/D Converters
Voltage-to-Frequency Converters
Precision RC Oscillator
Peak Detector
Motor Speed Control
Pulse Generator
Relay/Lamp Driver
PARALLEL
30V Differential Input Voltage
OUTPUTS
15V
5V
13
FULL-SCALE
24
20
12
4
12
TRIM
6.49k
R2*
Max 0.5mV Input Offset Voltage
Max 25nA Input Bias Current
Max 3nA Input Offset Current
Max 250ns Response Time
Min 200,000 Voltage Gain
R1
1k
11 10 9
5
E
14
6
U
7
6.98k
SAR REGISTER
R3
D/A CONVERTER
8
8
AM2504
START
12-BIT
15
7
9
S
6012
LM329
7V
6
16 17 18 19 20 21
0.001 F
10 s 12-Bit A/D Converter
5
CLOCK f = 1.4MHz
4
3.9k
U
16
3
CP
2
CC
D
S
17
1
19
PARALLEL
OUTPUTS
18
15V
–15V
SERIAL OUTPUT
2.49k
820
*R2 AND R4
R4*
SHOULD TC TRACK
0V TO 10V
R6
INPUT
LATCH
7475
2
3
–
+
LT1011A
DESCRIPTIO
The LT
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
15 V/ 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. These parametric improvements allow the
LT1011 to be used in high accuracy ( 12-bit) systems
without trimming. In a 12-bit A/D application, for instance,
using a 2mA DAC, the offset error introduced by the
LT1011 is less than 0.5LSB. The LT1011 retains all the
versatile features of the LM111, including single 3V to
with 50mA source/sink capability. It can drive loads refer-
enced to ground, negative supply or positive supply, and
is specified up to 50V between V
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.
18V supply operation, and a floating transistor output
1011 TA01
R5
1k
7
5V
®
1011 is a general purpose comparator with sig-
Voltage Comparator
U
450
400
350
300
200
100
500
250
150
50
0
0.1
Response Time vs Overdrive
LT1011/LT1011A
OUTPUT
RISING
FALLING
OUTPUT
–
OVERDRIVE (mV)
1
and the collector output.
10
1011 TA02
100
1
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