19-0435; Rev 0; 9/95
KIT
ATION
EVALU
E
L
B
A
IL
AVA
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
________________________Applications
Industrial-Control Systems
Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
Telecommunications
Functional Diagram appears at end of data sheet.
____________________________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 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
CS 2
27 V DD
D11 3
26 WR
D10 4
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
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).
MAX196/MAX198
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
ABSOLUTE MAXIMUM RATINGS
VDD 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)
CH0–CH5 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°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = 5V ±5%; unipolar/bipolar range; external reference mode, VREF = 4.096V; 4.7µF at REF pin; external clock, fCLK = 2.0MHz
with 50% duty cycle; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ACCURACY (Note 1)
Resolution
12
Integral Nonlinearity
INL
Differential Nonlinearity
DNL
±1/2
MAX196B/MAX198B
±1
±1
Unipolar
Offset Error
Bipolar
Channel-to-Channel Offset
Error Matching
MAX196A/MAX198A
±3
MAX196B/MAX198B
±5
MAX196A/MAX198A
±5
MAX196B/MAX198B
±0.1
Bipolar
±0.5
Unipolar
Bipolar
LSB
LSB
LSB
±10
Unipolar
Gain Error
(Note 2)
Gain Temperature Coefficient
(Note 2)
Bits
MAX196A/MAX198A
LSB
MAX196A/MAX198A
±7
MAX196B/MAX198B
±10
MAX196A/MAX198A
±7
MAX196B/MAX198B
LSB
±10
Unipolar
3
Bipolar
5
ppm/°C
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, ±10Vp-p (MAX196) or ±4.096Vp-p (MAX198), fSAMPLE = 100ksps)
Signal-to-Noise + Distortion Ratio
SINAD
Total Harmonic Distortion
THD
Spurious-Free Dynamic Range
SFDR
MAX196A/MAX198A
70
MAX196B/MAX198B
69
Up to the 5th harmonic
dB
-85
80
-78
dB
dB
Channel-to-Channel Crosstalk
50kHz, VIN = ±5V (MAX196) or ±4V (MAX198)
(Note 3)
Aperture Delay
External CLK mode/external acquisition control
15
ns
External CLK mode/external acquisition control
很抱歉,暂时无法提供与“MAX196ACAI+T”相匹配的价格&库存,您可以联系我们找货
免费人工找货