NTE999SM

Features:

  Programmable Output Voltage to 36 Volts
  Voltage Reference Tolerance:  ±1.0%
  Low Dynamic Output Impedance:  0.22Ω Typical
  Sink Current Capability of 1.0 to 100mA
  Equivalent Full Range Temperature Coefficient of 50ppm/°C Typical
  Temperature Compensated for Operation over Full Rated Operating Temperature Range
  Low Output Noise Voltage.


Pinout




Specifications

Cathode to Anode Voltage, V_KA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .  37V
Cathode Current Range, Continuous, I_K  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 100 to +150mA
Reference Input Current Range, Continuous, I_ref  . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . 0.05 to +10mA
Total Power Dissipation (T_A = +25°C), P_D  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .725mW 
                      Derate Above 25°C  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.8mW/°C
Operating Junction Temperature, T_J  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Operating Ambient Temperature Range, TA 0°. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .  to +70°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . 65° to +150°C
Thermal Resistance, JunctiontoAmbient, RthJ_A  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178°C/W
Thermal Resistance, JunctiontoCase, RthJ_C  . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 83°C/W
Lead Temperature (During Soldering, 1/16" ifrom case for 10sec), T_L . . . . . . . . . .. . . . . . . . . .  +260°C


Description

The NTE999SM integrated circuit is a threeterminal programmable shunt regulator.  This monolithic IC voltage reference operates as a low temperature coefficient zener which is programmable from Vref to 36 volts with two external resistors.  This NTE999SM exhibits a wide operating current range of 1.0 to 100mA with a typical dynamic impedance of 0.22Ω.  The characteristics of this reference make NTE999SM an excellent replacement for zener diodes in many applications such as digital voltmeters, power sup-plies, and op amp circuitry.  The 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since the NTE999SM operates as a shunt regulator, it can be used as either a positive or negative voltage reference.