19-0435; Rev 0; 9/95
KIT
ATION
EVALU
ILABLE
AVA
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
____________________________Features
o 12-Bit Resolution, 1/2LSB Linearity
o Single +5V Supply Operation
o Software-Selectable Input Ranges:
±10V, ±5V, 0V to +10V, 0V to +5V (MAX196)
±VREF, ±VREF/2, 0V to +VREF, 0V to +VREF/2
(MAX198)
o Internal 4.096V or External Reference
o Fault-Protected Input Multiplexer
o 6 Analog Input Channels
o 6µs Conversion Time, 100ksps Sampling Rate
o Internal or External Acquisition Control
o Two Power-Down Modes
o Internal or External Clock
______________Ordering Information
PART
TEMP. RANGE
MAX196ACNI
0°C to +70°C
PIN-PACKAGE
28 Narrow Plastic DIP
MAX196BCNI
MAX196ACWI
MAX196BCWI
MAX196ACAI
MAX196BCAI
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
28 Narrow Plastic DIP
28 Wide SO
28 Wide SO
28 SSOP
28 SSOP
Ordering Information continued at end of data sheet.
__________________Pin Configuration
TOP VIEW
CLK 1
28 DGND
Industrial-Control Systems
Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
Telecommunications
27 V DD
D11 3
26 WR
D10 4
________________________Applications
CS 2
25 RD
D9 5
D8 6
MAX196
MAX198
D7 7
24 INT
23 REF
22 REFADJ
D6 8
21 CH5
D5 9
20 CH4
D4 10
19 CH3
D3 11
18 CH2
D2 12
17 CH1
D1 13
Functional Diagram appears at end of data sheet.
16 CH0
D0 14
15 AGND
DIP/SO/SSOP/Ceramic SB
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-722-8266 for free samples or literature.
1
MAX196/MAX198
_______________General Description
The 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).
