Features: 12-Bit Resolution, 1/2LSB 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 ClockApplication Industrial-Control Systems Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
TelecommunicationsPinout
SpecificationsVDD to AGND................................................................-0.3V to +7V
AGND to DGND..........................................................-0.3V to +0.3V
REF to AGND...................................................-0.3V to (VDD + 0.3V)
REFADJ to AGND..............................................-0.3V to (VDD + 0.3V)
Digital Inputs to DGND....................................-0.3V to (VDD + 0.3V)
Digital Outputs to DGND..................................-0.3V to (VDD + 0.3V)
CH0CH5 to AGND ................................................................±16.5V
Continuous Power Dissipation (TA = +70°C)
Narrow Plastic DIP (derate 14.29mW/°C above +70°C)....1143mW
Wide SO (derate 12.50mW/°C above +70°C)...................1000mW
SSOP (derate 9.52mW/°C above +70°C) ...........................762mW
Narrow Ceramic SB (derate 20.00mW/°C above +70°C)..1600mW
Operating Temperature Ranges
MAX196_C_ I/MAX198_C_ I ......................................0°C to +70°C
MAX196_E_ I/MAX198_E_ I ...................................-40°C to +85°C
MAX196_MYI/MAX198_MYI....................................-55°C to +125°C
Storage Temperature Range ..................................-65°C to +150°C
Lead Temperature (soldering, 10sec) ...................................+300°CDescriptionThe 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 dataaccess 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 will be available after December 1995 (MAX196EVKIT-DIP).
MAX196 Data Sheet
