NTE1511 Integrated Circuit 5–Step LED Driver for Linear Scale Description: The NTE1511 is an integrated circuit in an 14–Lead DIP type package designed for use in level meter applications. This device is capable of driving 5 LEDs to create a bar–type display. In accordance with the input level, the uppermost LED brightness varies to form a linear indicator, making the NTE1511 ideal for use in signal meters and VU meters. A low–voltage reference power supply is built–in, so that the only external components required are LEDs, resistors, and capacitors. Features: D Wide Supply Voltage Range: +5V to +16V D Reference Voltage: Vref = 2.8V ±0.2V D LED Output Voltage: Constant Voltage D LED Current: Constant Current by Means of an External Resistor D Allowable Power Dissipation: Pdmax = 1.15W @ TA = +25°C Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage (Pin8), VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +18V Input Voltage (Pin1, Pin2, Pin3), VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VCC Output Voltage (Pin14), VOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +8.0V Output Voltage (Pin9 to Pin13, VOUT(D) ≤ VCC at output (D1 to D5) OFF), VOUT(D) . . –0.3V to +10V Reference Flow–Out Current (Pin5), Iref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.0mA to 0mA Allowable Power Dissipation, Pdmax Without Heatsink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3W With 50 x 50 x 1mm3 Al plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.15W Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10° to +60°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Note 1. A voltage of VCC+0.3V or more must not be applied to the input and output pins. Recommended Operating Conditions: (TA = +25°C unless otherwise specified) Parameter Supply Voltage Symbol Pin # Test Conditions Min Typ Max Unit VCC 8 5 – 16 V Input Voltage VIN1+, 2 2, 3 –0.3 – VCC V Output Pin Load Resistance RLOUT 14 15 – 20 kΩ Between OUT (Pin14) and GND (Pin7) Electrical Characteristics: (TA = +25°C, VCC = 5V to 16V unless otherwise specified) Parameter Input Bias Current (Amplifier) Input Bias Current (Comparator) Amplifier Offset Voltage (Amplifier) Reference Voltage Symbol Pin # Test Conditions Min Typ Max Unit = 1V –4 – 0 µA 2 VIN– = 1V, VIN1+ = VIN2+ = 0V –2 – 0 µA 3 VIN– = 1V, VIN1+ = VIN2+ = 0V –2 – 0 µA –5 – 0 µA –5 – 0 µA –150 – +150 mV –150 – +150 mV 2.6 – 3.0 V IDC(IN–) 1 VIN– IDC (IN1+) IDC (IN2+) = 0V, VIN1+ = VIN2+ IDC (–C) 4, 6 VIN– = 0V, VIN1+ = VIN2+ VRO1 = VRO2 = 0V IDC (+C) 14 VIN– = 1V, VIN1+ = VIN2+ = 0V, VOUT = 0V, VRO1 = VRO2 = Vref VOFF(1) 14 VCC = 6V to 12V, Amp Gain = 20dB = 1V, VOFF(2) Vref 5 Iref = 0 to –0.3mA VIN– = 0V, VIN1+ = VIN2+ VD1 to 5 = 2.0V to 2.3V Pin D Output Current (D1 to D5) IOL (D) 9 to 13 = 1V, –25 –18 –10 mA Pin D Output Leakage Current IOFF (D) 9 to 13 VIN– = 1V, VIN1+ = VIN2+ = 0V, VD1 to 5 = 0V –50 – 0 µA Output Pin Output Flow–Out Current IOH (1) VIN– = 1V, VIN1+ = VCC, VIN2+ = 0V, VOUT = 0V – – –3 mA VIN– = 1V, VIN1+ = 0V, VIN2+ = VCC, VOUT = 0V – – –3 mA 14 IOH (2) Current Dissipation Amplifier Gain ICC 8 VIN– = 1V, VIN1+ = VIN2+ = 0V – 12 25 mA VG1, VG2 – Open Loop 30 – – dB Min Typ Max Unit 2.9 3.0 3.1 dB Comparator Level: (TA = +25°C, VCC = 5V to 16V unless otherwise specified) Comparator Level Symbol Pin # Test Conditions LED5 (D5) GD5 13 LED4 (D4) GD4 12 2.3 2.4 2.5 dB LED3 (D3) GD3 11 1.7 1.8 1.9 dB LED3 (D2) GD2 10 1.1 1.2 1.3 dB LED1 (D1) GD1 9 0.5 0.6 0.7 dB VRO1 = 0V, VRO2 = 3V Pin Connection Diagram Tab Input (–) 1 14 RL Output Input (+) 1 2 13 LED5 Input (+) 2 3 12 LED4 RO 2 4 11 LED3 Vref 5 10 LED2 RO 1 6 9 LED1 GND 7 8 VCC .099 (2.52) 14 8 .252 (6.45) 1 7 .082 (2.1) Dia .265 (6.5) .748 (19.0) .300 (7.62) .167 (4.26) .100 (2.54) .236 (6.0) .137 (3.5)