NJU9252

The NJU9252 is a kind of low operating current, high performance 2-digit single chip A/D converter which contains a sample/hold circuit, an oscillator, a 7-segment decoder, LED display driver and a control circuit. The device realizes to apply with few external components, therefore, it is most suited for digital meters, digital thermometers and some other applications.

There are some features of NJU9252 as follows: (1)8-bit resolution, sucessive approximation method; (2)low input current: 1A typ; (3)dynamic LED direct driving; (4)sample/hold circuit on-chip; (5)CR oscillation circuit on-chip; (6)power-on initialization; (7)offset adjustment terminal; (8)low operating current; (9)package outline: DIP18; (10)CMOS technology.

The following of NJU9252 is about the absolute maximum ratings (Ta=25): (1)supply voltage, VDD: -0.3 to +7.0 V; (2)analog input voltage, VIN: GND to VREF V; (3)reference input voltage, VREF: GND to VDD V; (4)power dissipation, PD: 500 mW; (5)operating temperature range, Topr: -20 to +75; (6)storage temperature range, Tstg: -40 to +125.

The last one is about the electrical characteristics of NJU9252 (Ta=25, VDD=5 V): (1)operating voltage, VDD: 4.5 V min, 5.0 V typ and 5.5 V max; (2)linearity, DL: ±0.5 LSB typ and ±2 LSB max at full scale=2.475 V; (3)OFFSET, EOFF: ±1 LSB typ and ±2 LSB max when VREF=3.2 V; (4)leakage current, IL: 1A typ and 5A max at VIN=0 V; (5)zero reading drift, ZD: 0.2V/ typ and 1V/ max at VIN=0 V, -20