NTE1670 Integrated Circuit Air Core Meter Driver Description: The NTE1670 is a function generator/driver for air–core (moving–magnet) meter movements in a 14–Lead DIP type package. A Norton amplifier and an NPN transistor are included on chip for signal conditioning as required. Driver outputs are self–centering and develop ± 4.5V swing at 20mA. Better than 2% linearity is guaranteed over a full 305–degree operating range. Features: D Self–Centering 20mA Outputs D 12V Operation D Norton Amplifier D Function Generator Applications: D Air–Core Meter Driver D Tachometers D Ruggedized Instruments Absolute Maximum Ratings: Supply Voltage (Pin13), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1300mW Collector–Emitter Breakdown Voltage, V(BR)CEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20VMIN Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to –150°C Lead Temperature (During soldering, 10sec Max), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C Note 1 For operation above +25°C, the NTE1670 must be derated based upon a +125°C maximum junction temperature and a thermal resistance of +76°C/W which applies for the device soldered in a printed circuit board and operating in a still–air ambient. Electrical Characteristics: (VCC = 13.1V TA = +25°C unless otherwise specified) Parameter Supply Current (Pin13) Regulator Voltage (Pin11) Regulator Output Resistance (Pin11) Symbol Test Conditions Min Typ Max Unit IS Zero Input Frequency – – 65 mA 8.1 8.5 8.9 V – 13.5 – Ω VREG IREG = 0mA IREG = 0mA to 3mA Electrical Characteristics (Cont’d): (VCC = 13.1V TA = +25°C unless otherwise specified) Parameter Symbol Reference Voltage (Pin4) VREF Test Conditions Typ Max Unit 1.9 2.1 2.3 V – 5.3 – kΩ 0.9 1.0 1.1 – 125 – – 1.0 – mA IREF = 0mA Reference Output Resistance (Pin4) IREF = 0µA to 50µA Norton Amplifier Mirror Gain(Pin5, Pin6) IBIAS ^ 20µA NPN Transistor DC Gain (Pin9, Pin10) Min hFE Function Generator Feedback Bias Current (Pin1) V1 = 5.1V Drive Voltage Extremes, Sine and Cosine (Pin2, Pin12) ILOAD = 20mA ±4.0 ±4.5 – V Sine Output Voltage with Zero Input (Pin2) V8 = VREF –350 0 +350 mV Function Generator Linearity FSD = 305° – – ±1.7 %FSD Function Generator Gain k Meter Deflection/∆V8 50.75 53.75 56.75 Pin Connection Diagram Common 1 14 GND Sine Output 2 13 VCC N.C. 3 12 Cosine Output N.C. 4 11 8.5V Reg Inverting Input 5 10 Signal Input Non–Inverting Input 6 9 Pulse Train GND 7 8 Norton Amp Out 14 8 1 7 .785 (19.95) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min °/V