MAX197ACWI

Product Summary

The MAX197ACWI is a 12-Bit DAS with 8+4 Bus Interface. The MAX197ACWI requires only a single +5V supply for operation, yet accepts signals at its analog inputs that may span both above the power-supply rail and below ground. The MAX197ACWI provides 8 analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0V to +10V, or 0V to +5V. This increases effective dynamic range to 14 bits, and provides the user flexibility to interface 4mA-to-20mA, ±12V, and ±15V powered sensors to a single +5V system. In addition, the converter is overvoltage tolerant 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, a 100ksps throughput rate, software-selectable internal or external clock and acquisition, 8+4 parallel interface, and an internal 4.096V or an external reference.

Parametrics

MAX197ACWI absolute maximum ratings: (1)VDD to AGND: -0.3V to +7V; (2)AGND to DGND: -0.3V to +0.3V; (3)REF to AGND: -0.3V to (VDD + 0.3V); (4)REFADJ to AGND: -0.3V to (VDD + 0.3V); (5)Digital Inputs to DGND: -0.3V to (VDD + 0.3V); (6)Digital Outputs to DGND: -0.3V to (VDD + 0.3V); (7)CH0–CH7 to AGND : ±16.5V; (8)Continuous Power Dissipation (TA = +70℃); (9)Narrow Plastic DIP (derate 14.29mW/℃ above +70℃): 1143mW; (10)Wide SO (derate 12.50mW/℃ above +70℃): 1000mW; (11)SSOP (derate 9.52mW/℃ above +70℃): 762mW; (12)Narrow Ceramic SB (derate 20.00mW/℃ above +70℃): 1600mW; (13)Operating Temperature Ranges: 0℃ to +70℃.

Features

MAX197ACWI features: (1)12-Bit Resolution, 1/2LSB Linearity; (2)Single +5V Operation; (3)Software-Selectable Input Ranges: ±10V, ±5V, 0V to 10V, 0V to 5V; (4)Fault-Protected Input Multiplexer (±16.5V); (5)8 Analog Input Channels; (6)6μs Conversion Time, 100ksps Sampling Rate; (7)Internal or External Acquisition Control; (8)Internal 4.096V or External Reference; (9)Two Power-Down Modes; (10)Internal or External Clock.

Diagrams