MAX127BCAI

IC DAS 12-BIT MULTIRANGE 28-SSOP
The MAX127BCAI belongs to MAX127/MAX128 family which are multirange, 12-bit data acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. The MAX127/MAX128 feature a 2-wire, I2C-compatible serial interface that allows communication among multiple devices using SDA and SCL lines. A hardware shutdown input (SHDN) and two software- programmable power-down modes (standby and full power-down) are provided for low-current shutdown between conversions. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 420mA, ±12V, and ±15V-powered sensors directly to a single +5V system. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to +VREF/2 for the MAX128. In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, an 8ksps throughput rate, and the option of an internal 4.096V or external reference. In standby mode, the reference-buffer remains active, eliminating start-up delays. The MAX127/MAX128 are available in 24-pin DIP or space-saving 28-pin SSOP packages.

The features of MAX127BCAI can be summarized as (1)12-Bit resolution, 1/2 LSB linearity; (2)+5V single-supply operation; (3)I2C-compatible, 2-wire serial interface; (4)four software-selectable input ranges MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V MAX128: 0 to +VREF, 0 to +VREF/2, ±VREF, ±VREF/2; (5)8 analog input channels; (6)8ksps sampling rate; (7)±16.5V overvoltage-tolerant input multiplexer; (8)internal 4.096V or external reference; (9)two power-down modes; (10)24-Pin narrow DIP or 28-Pin SSOP packages; (11).

The absolute maximum ratings of MAX127BCAI are (1)VDD to AGND: -0.3V to +6V; (2)AGND to DGND: -0.3V to +0.3V; (3)CH0CH7 to AGND: ±16.5V; (4)REF to AGND: -0.3V to (VDD + 0.3V); (5)REFADJ to AGND: -0.3V to (VDD + 0.3V); (6)A0, A1, A2 to DGND: -0.3V to (VDD + 0.3V); (7)SHDN, SCL, SDA to DGND: -0.3V to +6V; (8)max current into any pin: 50mA; (9)continuous power dissipation (TA = +70°C) 24-Pin Narrow DIP (derate 13.33mW/°C above +70°C): 1067mW, 28-Pin SSOP (derate 9.52mW/°C above +70°C): 762mW; (10)operating temperature ranges MAX127_ C_ _/MAX128_ C_ _: 0°C to +70°C , MAX127_ E_ _/MAX128_ E_ _: -40°C to +85°C; (11)storage temperature range: -65°C to +150°C; (12)lead temperature (soldering, 10sec): +300°C.(Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.)