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NTE1507 Integrated Circuit 10-Step Adjustable Analog Level Detector
Description: The NTE1507 is an integrated circuit in a 16-Lead 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-adjust pin allows the user to decrease the input voltage steps from 200mV to 100mV increments by connecting an external resistor from Threshold Adjust to GND. This level detector is directly cascadable requiring only two external resistors to establish a zero-reference 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-precision meters, warning-signal indicators, A/D converters, feedback regulators, pulse shapers, delay elements, and for automatic range switching. The open-emitter 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 elements such as vacuum flourescent displays, LED's, or filament lamps. The outputs may also drive digital integrated logic such as CMOS or other high-level 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-Emitter Outputs Capable of Sourcing up to 25mA and Withstanding up to 35V D Supply Voltage Range of 10V to 35V (VCC2) Absolute Maximum Ratings: (TA = 0 to +70C unless otherwise specified) Supply Voltage VCC1 (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Input Voltage Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V Cascade Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to VCC2 On-State Output Current (Each Output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30mA Continuous Total Dissipation (TA +25C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2075mW Derate Linearly Above 25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.6mW/C Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Lead Temperature (During Soldering, 1/16" (1.6mm) from case, 10sec), TL . . . . . . . . . . . . . +260C Note 1. Voltage values are with respect to network ground terminal.
Recommended Operating Conditions:
Parameter Supply Voltage Symbol VCC1 VCC2 Cascade Input Voltage (When not at GND) Output Current Operating Ambient Temperature IO TA Test Conditions Min 10.8 10.0 1 - 0 Typ 12.0 25.0 - - - Max 13.2 35.0 8 25 70 Unit V V V mA C
Electrical Characteristics: (TA = 0 to +70C, Pin5 at GND, Pin6 Open, Note 2 unless otherwise specified)
Parameter Positive-Going Threshold Voltage at Input A Switching Q1 Switching Q2 Switching Q3 Switching Q4 Switching Q5 Switching Q6 Switching Q7 Switching Q8 Switching Q9 Switching Q10 Input Hysteresis High-Level (On-State) Output Voltage VT+ - VT- VOH IOL IL IOH = -10mA IOH = -25mA Low-Level (Off-State) Output Current Input Current Analog Input Cascade Input Supply Current from VCC1 All Outputs High All Outputs Low Supply Current from VCC2 All Outputs High All Outputs Low VCC1 = 12V, VCC2 = 35V, No Load ICC VCC1 = 12V, No Load VCC2 = 35V VI = 2V Symbol VT+ Test Conditions TA = +25C Min 125 325 525 725 925 1125 1325 1525 1725 1925 - VCC2-1.3 VCC2-1.5 - - - - - - - Typ 200 400 600 800 1000 1200 1400 1600 1800 2000 10 VCC2-0.8 VCC2-0.9 0.5 260 1000 15 9 15 1 Max 275 475 675 875 1075 1275 1475 1675 1875 2075 - - - 200 400 1700 25 15 27 200 Unit mV mV mV mV mV mV mV mV mV mV mV V V A A A mA mA mA A
Note 2. All typical values are at VCC1 = 12V, VCC2 = 25V, and TA = +25C.
Pin Connection Diagram
Q9 Q10 VCC 1 Analog Input Cascade Input Threshold Adjust GND Q1
1 2 3 4 5 6 7 8
16 Q8 15 Q7 14 Q6 13 VCC 2 12 Q5 11 Q4 10 Q3 9 Q2
16
9
.260 (6.6) Max
1
8
.785 (19.9) Max .200 (5.08) Max .245 (6.22) Min
.300 (7.62)
.100 (2.54) .700 (17.7)

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