NJU9207B

The NJU9207B is 3*1/2 digit single chip digital multimeter LSI with auto-ranging function containing  3*1/2 digit dual-lope  A/D converter, voltage reference, controller,oscillator,battery-life detector and LCD driver.The NJU9207B is most suitable  for the pocket type digital multimeter because of low operating voltage(3V) and functions of auto-ranging,display hold, LCD display,piezo buzzer direct driving and  battery life indicator.

Features of the NJU9207B are:(1)low operating current; (2)low operating voltage(3V); (3)dual-slope A/D converter; (4)auto-ranging; (5)holding function(data, range); (6)LCD display direct driving; (7)voltage doubter for LCD driver on-chip; (8)voltage regulator for LCD driving; (9)piezo buzzer direct driving; (10)power-on initialize; (11)battery-life detector; (12)package outline:QFP 80; (13)C-MOS technology.The NJU9207B has the reference voltage generator and the reference voltage can be adjusted by setting the value of the external fix and variable resistors.The NJU9207B is classified 7 ranks (A,B,C,D,E,F,G)  due to the internal reference voltage tolerance. Therefore,aleaseselect the external fix (R1 and R2) and variable (RV) resistors according to the below table.

The absolute maximum ratings of the NJU9207B can be summarized as:(1)supply voltage:2.0 to 4.0V;(2)storage temperature range:-40 to +125;(3)operating temperature range:0 to 50 ;(4)soldering temperature:260;(5)soldering time:10sec.The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product characteristics. Before ordering, purchasers are advised to contact the Sensitron Semiconductor sales department for the latest version of the datasheet(s).In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment,medical equipment, and safety equipment), safety should be ensured by using semiconductor devices that feature assured safety or by means of users' fail-safe precautions or other arrangement.In no event shall Sensitron Semiconductor be liable for any damages that may result from an accident or any other cause during operation of the user's units according to the datasheet(s). Sensitron Semiconductor assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information, products or circuits described in the datasheets.