19-0435; Rev 0; 9/95
Mu lt ira n g e , S in g le +5 V, 1 2 -Bit DAS
w it h 1 2 -Bit Bu s In t e rfa c e
6/MAX198
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ 12-Bit Resolution, 1/2LSB Linearity
♦ Single +5V Supply Operation
♦ Software-Selectable Input Ranges:
±10V, ±5V, 0V to +10V, 0V to +5V (MAX196)
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
, ±V
/2, 0V to +V
, 0V to +V /2
REF
REF
REF
REF
(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
±V
, ±V
/2, 0V to +V
, and 0V to +V
/2 for
REF
REF
REF
REF
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.
♦ Internal or External Clock
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
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
0°C to +70°C
PIN-PACKAGE
28 Narrow Plastic DIP
28 Narrow Plastic DIP
28 Wide SO
MAX196ACNI
MAX196BCNI
MAX196ACWI
MAX196BCWI
MAX196ACAI
MAX196BCAI
Two p rog ra mma b le p owe r-d own mod e s (STBYPD,
FULLPD) provide low-current shutdown between con-
ve rs ions . In STBYPD mod e , the re fe re nc e b uffe r
remains active, eliminating start-up delays.
28 Wide SO
28 SSOP
The MAX196/MAX198 employ a standard microproces-
sor (µP) interface. A three-state data I/O port is config-
ure d to op e ra te with 16-b it d a ta b us e s , a nd d a ta -
access and bus-release timing specifications are com-
patible with most popular µPs. All logic inputs and out-
puts are TTL/CMOS compatible.
28 SSOP
Ordering Information continued at end of data sheet.
__________________P in Co n fig u ra t io n
TOP VIEW
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).
CLK
CS
28 DGND
1
2
V
27
26
25
24
23
DD
WR
RD
D11
D10
D9
3
4
INT
REF
5
________________________Ap p lic a t io n s
Industrial-Control Systems
Robotics
MAX196
MAX198
D8
6
D7
7
22 REFADJ
21 CH5
D6
8
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
D5
CH4
CH3
CH2
CH1
CH0
AGND
9
20
19
18
17
16
15
D4
10
D3 11
D2 12
Telecommunications
13
14
D1
D0
DIP/SO/SSOP/Ceramic SB
Functional Diagram appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
Ca ll t o ll fre e 1 -8 0 0 -7 2 2 -8 2 6 6 fo r fre e s a m p le s o r lit e ra t u re .