Product Summary

The LM394N is a junction isolated ultra wellmatched monolithic NPN transistor with an order of magnitude improvement in matching over conventional transistor pairs. This was accomplished by advanced linear processing and a unique new device structure. Electrical characteristics of the LM394N such as drift versus initial offset voltage, noise, and the exponential relationship of base-emitter voltage to collector current closely approach those of a theoretical transistor.

Parametrics

LM394N absolute maximum ratings: (1)Collector Current: 20 mA; (2)Collector-Emitter Voltage: VMAX; (3)Collector-Emitter Voltage: 35V; (4)Collector-Base Voltage: 35V; (5)Collector-Substrate Voltage: 35V; (6)Collector-Collector Voltage: 35V; (7)Base-Emitter Current: ±10 mA; (8)Power Dissipation: 500 mW.

Features

LM394N features: (1)Emitter-base voltage matched to 50 mV; (2)Offset voltage drift less than 0.1 mV/℃; (3)Current gain (hFE) matched to 2%; (4)Common-mode rejection ratio greater than 120 dB; (5)Parameters guaranteed over 1 mA to 1 mA collector current; (6)Extremely low noise; (7)Superior logging characteristics compared to conventional pairs; (8)Plug-in replacement for presently available devices.

Diagrams

LM394N block diagram