19-0401; Rev 0; 6/95
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 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 Operation
♦ Software-Selectable Input Ranges:
±VREF, ±VREF/2, 0V to VREF, 0V to VREF/2
♦ Internal 4.096V or External Reference
♦ Fault-Protected Input Multiplexer (±16.5V)
♦ 8 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
MAX199ACNI
0°C to +70°C
PIN-PACKAGE
28 Narrow Plastic DIP
MAX199BCNI
0°C to +70°C
28 Narrow Plastic DIP
MAX199ACWI
0°C to +70°C
28 Wide SO
MAX199BCWI
0°C to +70°C
28 Wide SO
MAX199ACAI
0°C to +70°C
28 SSOP
MAX199BCAI
0°C to +70°C
28 SSOP
MAX199BC/D
0°C to +70°C
Dice*
Ordering Information continued at end of data sheet.
*Dice are specified at TA = +25°C, DC parameters only.
__________________Pin Configuration
TOP VIEW
CLK 1
28 DGND
CS 2
27 V DD
WR 3
26 REF
RD 4
25 REFADJ
HBEN 5
SHDN 6
MAX199
D7 7
24 INT
23 CH7
22 CH6
D6 8
21 CH5
D5 9
20 CH4
D4 10
19 CH3
D3/D11 11
18 CH2
D2/D10 12
17 CH1
D1/D9 13
16 CH0
D0/D8 14
15 AGND
DIP/SO/SSOP/Ceramic SB
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-722-8266 for free samples or literature.
1
MAX199
_______________General Description
The MAX199 multi-range, 12-bit data-acquisition system
(DAS) requires only a single +5V supply for operation,
and converts analog signals up to ±4V at its inputs. This
system provides eight analog input channels that are
independently software programmable for a variety of
ranges: ±VREF, ±VREF/2, 0V to VREF, or 0V to VREF/2.
This increases effective dynamic range to 14 bits, and
provides the user flexibility to interface 4mA-to-20mA,
±12V, and ±15V powered sensors to a single +5V system. In addition, the converter is 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, internal/external clock, internal/external
acquisition control, 8+4 parallel interface, and operation
with an internal 4.096V or external reference.
A hardware SHDN pin and two programmable powerdown modes (STBYPD, FULLPD) provide low-current
shutdown between conversions. In STBYPD mode, the
reference buffer remains active, eliminating start-up
delays.
The MAX199 employs a standard microprocessor (µP)
interface. Its three-state data I/O interface is configured
to operate with 8-bit data buses, and data-access and
bus-release timing specifications are compatible with
most popular µPs. All logic inputs and outputs are
TTL/CMOS compatible.
The MAX199 is available in 28-pin DIP, wide SO, SSOP,
and ceramic SB packages.
For a different combination of input ranges (±10V, ±5V,
0V to 10V, 0V to 5V), see the MAX197 data sheet. For 12bit bus interfaces, see the MAX196/MAX198 data sheet.
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 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–CH7 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
MAX199_C_ _ .......................................................0°C to +70°C
MAX199_E_ _.....................................................-40°C to +85°C
MAX199_M_ _ ..................................................-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.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ACCURACY (Note 1)
Resolution
12
Integral Nonlinearity
INL
Differential Nonlinearity
DNL
±1/2
MAX199B
±1
±1
Unipolar
Offset Error
Bipolar
Channel-to-Channel Offset
Error Matching
MAX199A
±3
MAX199B
±5
MAX199A
±5
MAX199B
±0.1
Bipolar
±0.5
Gain Error
(Note 2)
Bipolar
LSB
LSB
LSB
±10
Unipolar
Unipolar
Gain Temperature Coefficient
(Note 2)
Bits
MAX199A
LSB
MAX199A
±7
MAX199B
±10
MAX199A
±7
MAX199B
LSB
±10
Unipolar
3
Bipolar
5
ppm/°C
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, ±4.096Vp-p, fSAMPLE = 100ksps)
Signal-to-Noise + Distortion Ratio
SINAD
Total Harmonic Distortion
THD
Spurious-Free Dynamic Range
SFDR
MAX199A
70
MAX199B
69
Up to the 5th harmonic
dB
-85
80
-78
dB
dB
Channel-to-Channel Crosstalk
50kHz, VIN = ±4V (Note 3)
-86
dB
Aperture Delay
External CLK mode/external acquisition control
15
ns