_______________General Description
The MAX196/MAX198 multirange, 12-bit data-acquisi-
tion 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 indepen-
dently software programmable for a variety of ranges:
±10V, ±5V, 0V to +10V, and 0V to +5V for the MAX196;
±V
REF
, ±V
REF
/2, 0V to +V
REF
, and 0V to +V
REF
/2 for
the MAX198. This range switching increases the effec-
tive 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 con-
verters 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, soft-
ware-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 con-
versions. In STBYPD mode, the reference buffer
remains active, eliminating start-up delays.
The MAX196/MAX198 employ a standard microproces-
sor (µP) interface. A three-state data I/O port is config-
ured to operate with 16-bit data buses, and data-
access and bus-release timing specifications are com-
patible with most popular µPs. All logic inputs and out-
puts 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).
________________________Applications
Industrial-Control Systems
Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
Telecommunications
____________________________Features
♦ 12-Bit Resolution, 1/2LSB Linearity
♦ Single +5V Supply Operation
♦ Software-Selectable Input Ranges:
±10V, ±5V, 0V to +10V, 0V to +5V (MAX196)
±V
REF
, ±V
REF
/2, 0V to +V
REF
, 0V to +V
REF
/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
MAX196/MAX198
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
________________________________________________________________
Maxim Integrated Products
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DGND
V
DD
WR
RD
INT
REF
AGND
REFADJ
CH5
CH4
CH3
CH2
CH1
CH0
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
CS
CLK
DIP/SO/SSOP/Ceramic SB
TOP VIEW
MAX196
MAX198
__________________Pin Configuration
Call toll free 1-800-722-8266 for free samples or literature.
19-0435; Rev 0; 9/95
PART
MAX196ACNI
MAX196BCNI
MAX196ACWI 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
28 Narrow Plastic DIP
28 Narrow Plastic DIP
28 Wide SO
EVALUATION KIT
AVAILABLE
______________Ordering Information
MAX196BCWI 0°C to +70°C 28 Wide SO
Functional Diagram appears at end of data sheet.
Ordering Information continued at end of data sheet.
MAX196ACAI 0°C to +70°C 28 SSOP
MAX196BCAI 0°C to +70°C 28 SSOP
