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MAX199：8-Channel, Multi-Range, 5V, 12-Bit DAS with 8+4 Bus Interface and Fault Protection

±17V Fault-Protected ADC with Software-Selectable Input Ranges

The MAX199 multi-range, 12-bit data-acquisition system (DAS) requires only a single +5V supply for operation, and converts analog signals up to ±4V at its inputs. This system provides eight analog input channels that are independently software programmable for a variety of ranges: ±VREF, ±VREF/2, 0V to VREF, or 0V to VREF/2. 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 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, 100ksps throughput rate, internal/external clock, internal/external acquisition control, 8+4 parallel interface, and operation with an internal 4.096V or external reference. A hardware active-low SHDN pin and two programmable power-down modes (STBYPD, FULLPD) provide low-current shutdown between conversions. In STBYPD mode, the reference buffer remains active, eliminating start-up delays. The MAX199 employs a standard microprocessor (µP) interface. Its three-state data I/O interface is configured to operate with 8-bit data buses, and data-access and bus-release timing specifications are compatible with most popular µPs. All logic inputs and outputs are TTL/CMOS compatible. The MAX199 is available in 28-pin DIP, wide SO, SSOP, and ceramic SB packages. For a different combination of input ranges (±10V, ±5V, 0V to 10V, 0V to 5V), see the MAX197 data sheet. For 12-bit bus interfaces, see the MAX196/MAX198 data sheet.

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

MAX199: Functional Diagram Applications/Uses Automatic Testing Systems Data-Acquisition Systems Industrial-Control Systems Medical Instruments Robotics Telecommunications

DataSheet

Parametrics

Design kits & evaluation modules

• MAX197EVKIT

Related Products

• MAX1261：250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
• MAX1262：400ksps, +5V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
• MAX115：2x4-Channel, Simultaneous-Sampling 12-Bit ADCs
• MAX1291：250ksps, +3V, 8-/4-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface
• MAX197：Multi-Range (±10V, ±5V, +10V, +5V), Single +5V, 12-Bit DAS with 8+4 Bus Interface
• MAX198：6-Channel, Multirange, 5V, 12-Bit DAS with 12-Bit Bus Interface and Fault Protection

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