ADM12914

The ADM12914 is available in two models. It includes a 1 V buffered reference output, REF, that acts as an offset when monitoring a negative voltage. The product offers a latching overvoltage output that can be cleared by toggling the LATCH input pin. The three-state SEL pin determines the polarity of the third and fourth inputs, that is, it configures the device to monitor positive or negative supplies. The device incorporates an internal shunt regulator that enables the device to be used in higher voltage systems. This feature requires a resistor to be placed between the main supply rail and the VCC pin to limit the current flow into the VCC pin at a level no greater than 10 mA. The ADM12914 uses the internal shunt regulator to regulate VCC if the supply line exceeds the absolute maximum ratings. The product has a disable pin that can override and disable both the UV and the OV output signals. The product is available in a 16-lead QSOP package. The device is specified over the extended temperature range of -40°C to +125°C. The ADM12914 is a quad voltage supervisory IC ideally suited for monitoring multiple rails in a wide range of applications. Each monitored rail has two dedicated input pins, VHx and VLx, which allows each rail to be monitored for both undervoltage (UV)and overvoltage (OV)conditions with high threshold accuracy of ±0.8%. Common active low undervoltage (UV)and overvoltage (OV)pins are shared by each of the monitored voltage rails.

The features of ADM12914 can be summarized as (1)quad undervoltage/overvoltage (UV/OV)positive/negative supervisor; (2)supervises up to two negative rails; (3)adjustable UV and OV input thresholds; (4)industry leading threshold accuracy over the extended temperature range: ±0.8%; (5)1 V buffered reference output; (6)open-drain UV and OV reset outputs; (7)adjustable reset timeout with disable option; (8)outputs guaranteed down to VCC of 0.9 V; (9)glitch immunity; (10)62 A supply current; (11)16-lead QSOP package; (12)specified from -40°C to +125°C.

The absolute maximum ratings of ADM12914 are (1)VCC: -0.3 V to +6 V; (2)UV, OV: -0.3 V to +16 V; (3)TIMER: -0.3 V to (VCC + 0.3 V); (4)VLx, VHx, LATCH, DIS, SEL: -0.3 V to +7.5 V; (5)ICC: 10 mA; (6)reference load current (IREF): ±1 mA; (7)IUV, IOV: 10 mA; (8)storage temperature range: -65°C to +150°C; (9)operating temperature range: -40°C to +125°C; (10)lead temperature (Soldering, 10 sec): 300°C.