6-Channel, Multirange, 5V, 12-Bit DAS with 12-Bit Bus Interface and Fault Protection
±17V Fault-Protected ADC with Software-Selectable Input Ranges
DescriptionThe MAX196/MAX198 multirange, 12-bit data-acquisition systems (DAS) require only a single +5V supply for operation, yet convert analog signals at their inputs up to ±10V (MAX196) and ±4V (MAX198). These systems provide six analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0V to +10V, and 0V to +5V for the MAX196; ±VREF, ±VREF/2, 0V to +VREF, and 0V to +VREF/2 for the MAX198. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface ±12V, ±15V, and 4mA to 20mA powered sensors to a single +5V system. 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, 100ksps throughput rate, software-selectable internal/external clock, internal/external acquisition control, 12-bit parallel interface, and internal 4.096V or external reference.
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 MAX196/MAX198 employ a standard microprocessor (µP) interface. A three-state data I/O port is configured to operate with 16-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.
These devices are available in 28-pin DIP, wide SO, SSOP (55% smaller in area than wide SO), and ceramic SB packages. For 8+4 bus interface, see the MAX197 and the MAX199 data sheets. An evaluation kit is available (MAX196EVKIT-DIP).
- 12-Bit Resolution, 1/2 LSB Linearity
- Single +5V Supply Operation
- Software-Selectable Input Ranges:
- ±10V, ±5V, 0V to +10V, 0V to +5V (MAX196)
- ±VREF, ±VREF/2, 0V to +VREF, 0V to +VREF/2 (MAX198)
- Internal 4.096V or External Reference
- Fault-Protected Input Multiplexer
- 6 Analog Input Channels
- 6µs Conversion Time, 100ksps Sampling Rate
- Internal or External Acquisition Control
- Two Power-Down Modes
- Internal or External Clock
- Automated Test Equipment (ATE)
- Data Acquisition
- Industrial Controls Systems
- Medical Instruments
|Input Channels||Conv. Rate|
|ADC Architecture||Data Bus||Diff/S.E. Input||Internal VREF|
MAX196EVKIT: Evaluation Kit for MAX196 and MAX198
Technical DocumentsApp Note 270 Analog-Signal Data Acquisition in Industrial Automation Systems
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|