NTE1507
Integrated Circuit
10鈥揝tep Adjustable Analog Level Detector
Description:
The NTE1507 is an integrated circuit in a 16鈥揕ead 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 threshold鈥揳djust 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 zero鈥搑ef-
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 low鈥損recision meters, warning鈥搒ig-
nal indicators, A/D converters, feedback regulators, pulse shapers, delay elements, and for automatic
range switching. The open鈥揺mitter 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鈥檚, or filament lamps. The outputs may also drive
digital integrated logic such as CMOS or other high鈥搇evel 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
Open鈥揈mitter 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擄 to +70擄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
On鈥揝tate Output Current (Each Output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0mA
Continuous Total Dissipation (T
A
鈮?/div>
+25擄C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2075mW
Derate Linearly Above 25擄C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.6mW/擄C
Operating Ambient Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0擄 to +70擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Lead Temperature (During Soldering, 1/16鈥?(1.6mm) from case, 10sec), T
L
. . . . . . . . . . . . . +260擄C
Note 1. Voltage values are with respect to network ground terminal.
1
2
3
