The ML2340 and ML2350 are CMOS voltage output, 8-bit D/A converters with an internal voltage reference and a μP interface. These devices are designed to be powered by a single supply, although they can be powered from dual power supplies. The output voltage swings above zero scale (VZS) in the unipolar mode or around zero scale (VZS) in the bipolar mode, both with programmable gain. VZS can be set to any voltage from AGND to 2.25V below VCC. The digital and analog grounds, DGND and AGND, are totally independent of each other. DGND can be set to any voltage from AGND to 4.5V below VCC for easy interfacing to standard TTL and CMOS logic families.
The high level of integration and versatility of the ML2340 and ML2350 makes them ideal for a wide range of applications in hard disk drives, automotive, telecom, and a variety of general purpose industrial uses. One specific intended application is controlling a hard disk voice coil.
The internal reference of the ML2340 provides a 2.25V or 4.50V output for use with A/D converters that use a single 5V ±10% power supply, while the ML2350 provide a 2.50V or 5.00V reference output.
Features:
·Programmable output voltage gain settings of 2, 1, 1/2, 1/4 provide 8-, 9-, 10-, or 11-bit effective resolution around zero·AGND to VCC output voltage swing·Bipolar or unipolar output voltage·4.5V to 13.2V single supply or ±2.25V to ±6.5V dual-supply operation ·Transparent latch allows microprocessor interface with 30ns setup time·Data flow-through mode·Voltage reference output ML2340 ........................................... 2.25V or 4.50V ML2350 ........................................... 2.50V or 5.00V·Nonlinearity ....................................±1/4 LSB or ±1/2 LSB·Output voltage settling time over temperature and supply voltage tolerance Within 1V of VCC and AGND ................... 2.5μs max Within 100mV of VCC and AGND ............... 5μs max·TTL and CMOS compatible digital inputs·Low supply current (5V supply) ..................... 5mA max·18-pin DIP or surface mount SOlC
(Absolute) Maximum Ratings:
Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
Supply Voltage VCC with Respect to AGND............ 14.2V DGND ............................................ –0.3V to VCC + 0.3V VZS, VREF IN ................................................ –0.3V to VCC + 0.3V Logic Inputs .................................... –0.3V to VCC + 0.3V Input Current per Pin ............................................±25mA Storage Temperature ..............................–65°C to +150°C Package Dissipation at TA = 25°C (Board Mount) ...875mW Lead Temperature (Soldering 10 sec.) Dual-In-Line Package (Molded) .......................... 260°C Dual-In-Line Package (Ceramic) ......................... 300°C Molded Small Outline IC Package Vapor Phase (60 sec.) ..................................... 215°C Infrared (15 sec.) ............................................ 220°C
