NTE1507
Integrated Circuit
10Step Adjustable Analog Level Detector
Description:
The NTE1507 is an integrated circuit in a 16Lead DIP type package consisting of ten comparators
and a reference voltage network to detect the level of a signal at the analog input. Output Q1 is
switched to a low logic level at a typical input voltage of 200mV with Threshold Adjust open and the
cascade input grounded. After each 200mV increment, the next output is switched to a low logic level.
All outputs are at low logic levels at a typical input voltage of 2000mV. The thresholdadjust pin allows
the user to decrease the input voltage steps from 200mV to 100mV increments by connecting an ex-
ternal resistor from Threshold Adjust to GND.
This level detector is directly cascadable requiring only two external resistors to establish a zeroref-
erence level voltage for the cascade input. The maximum number of devices that can be cascaded
is determined by the threshold level and the maximum input voltages. If the cascade feature is not
utilized, the cascade input must be grounded for proper operation.
The NTE1507 is especially designed to detect and indicate analog signal levels and may be used in
various industrial, consumer, or automotive applications such as lowprecision meters, warningsig-
nal indicators, A/D converters, feedback regulators, pulse shapers, delay elements, and for automatic
range switching. The openemitter outputs are capable of sourcing currents up to 25mA and may
be operated at voltages up to 35V. The power outputs are suitable for driving a variety of display ele-
ments such as vacuum flourescent displays, LED's, or filament lamps. The outputs may also drive
digital integrated logic such as CMOS or other highlevel logic.
Features:
D
10 Comparators to Digitize Analog Input Signals
D
Cascade Feature Allows Stacking Output Display Strings
D
Threshold Intervals Adjustable from 200mV to 100mV
D
OpenEmitter Outputs Capable of Sourcing up to 25mA and Withstanding up to 35V
D
Supply Voltage Range of 10V to 35V (V
CC2
)
Absolute Maximum Ratings: (T
A
= 0
to +70
C unless otherwise specified)
Supply Voltage
V
CC1
(Note 1)
20V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
CC2
40V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage
Analog Input
8V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cascade Input
8V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Range
0V to V
CC2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OnState Output Current (Each Output)
30mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous Total Dissipation (T
A
+25
C)
2075mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Linearly Above 25
C
16.6mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 1/16" (1.6mm) from case, 10sec), T
L
+260
C
. . . . . . . . . . . . .
Note 1. Voltage values are with respect to network ground terminal.
Recommended Operating Conditions:
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
V
CC1
10.8
12.0
13.2
V
V
CC2
10.0
25.0
35.0
V
Cascade Input Voltage (When not at GND)
1
8
V
Output Current
I
O
25
mA
Operating Ambient Temperature
T
A
0
70
C
Electrical Characteristics: (T
A
= 0
to +70
C, Pin5 at GND, Pin6 Open, Note 2 unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
PositiveGoing Threshold Voltage at Input A
Switching Q1
V
T+
T
A
= +25
C
125
200
275
mV
Switching Q2
325
400
475
mV
Switching Q3
525
600
675
mV
Switching Q4
725
800
875
mV
Switching Q5
925
1000
1075
mV
Switching Q6
1125
1200
1275
mV
Switching Q7
1325
1400
1475
mV
Switching Q8
1525
1600
1675
mV
Switching Q9
1725
1800
1875
mV
Switching Q10
1925
2000
2075
mV
Input Hysteresis
V
T+
V
T
10
mV
HighLevel (OnState) Output Voltage
V
OH
I
OH
= 10mA
V
CC2
1.3
V
CC2
0.8
V
I
OH
= 25mA
V
CC2
1.5
V
CC2
0.9
V
LowLevel (OffState) Output Current
I
OL
V
CC2
= 35V
0.5
200
A
Input Current
Analog Input
I
L
V
I
= 2V
260
400
A
Cascade Input
1000
1700
A
Supply Current from V
CC1
All Outputs High
I
CC
V
CC1
= 12V, No Load
15
25
mA
All Outputs Low
9
15
mA
Supply Current from V
CC2
All Outputs High
V
CC1
= 12V,
15
27
mA
All Outputs Low
CC1
V
CC2
= 35V, No Load
1
200
A
Note 2. All typical values are at V
CC1
= 12V, V
CC2
= 25V, and T
A
= +25
C.
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