MAX199AEWI ,Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus InterfaceApplications REFADJRD 4 25Industrial-Control SystemsHBEN 5 24 INTMAX199RoboticsSHDN 6 23 CH7Data-Ac ..
MAX199AEWI+ ,8-Channel, Multi-Range, 5V, 12-Bit DAS with 8+4 Bus Interface and Fault ProtectionELECTRICAL CHARACTERISTICS(V = 5V ±5%; unipolar/bipolar range; external reference mode, V = 4.096V; ..
MAX199BCAI ,Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus InterfaceGeneral Description ________
MAX199BCNI ,Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus InterfaceFeatures' 12-Bit Resolution, 1/2LSB LinearityThe MAX199 multi-range, 12-bit data-acquisition system ..
MAX199BCNI+ ,8-Channel, Multi-Range, 5V, 12-Bit DAS with 8+4 Bus Interface and Fault ProtectionELECTRICAL CHARACTERISTICS (continued)(V = 5V ±5%; unipolar/bipolar range; external reference mode, ..
MAX199BCNI+ ,8-Channel, Multi-Range, 5V, 12-Bit DAS with 8+4 Bus Interface and Fault ProtectionApplications REFADJRD 4 25Industrial-Control SystemsHBEN 5 24 INTMAX199RoboticsSHDN 6 23 CH7Data-Ac ..
MAX503CAG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACfeatures but with a serial data______________Ordering Informationinterface, refer to the MAX504/MAX ..
MAX503CNG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACapplications. In addition, the shrink small-40µA Shutdown-Mode Currentoutline package (SSOP) measur ..
MAX503CNG+ ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACApplicationsMAX503CNG 0°C to +70°C 24 Narrow Plastic DIPBattery-Powered Data-Conversion ProductsMAX ..
MAX503CWG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACApplicationsMAX503CNG 0°C to +70°C 24 Narrow Plastic DIPBattery-Powered Data-Conversion ProductsMAX ..
MAX503CWG+ ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACELECTRICAL CHARACTERISTICS—Single +5V Supply(V = 5V, V = 0V, AGND = DGND = REFGND = 0V, REFIN = 2.0 ..
MAX503EAG ,5V, Low-Power, Parallel-Input, Voltage-Output, 10-Bit DACELECTRICAL CHARACTERISTICS—Single +5V Supply(V = 5V, V = 0V, AGND = DGND = REFGND = 0V, REFIN = 2.0 ..
MAX199ACAI-MAX199ACWI-MAX199AEAI-MAX199AEWI-MAX199BCAI-MAX199BCNI-MAX199BENI
Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus Interface
_______________General DescriptionThe 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 sys-
tem. In addition, the converter is fault-protected to
±16.5V; a fault condition on any channel will notaffect
the conversion result of the selected channel. Other fea-
tures 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 SHDNpin and 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 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 12-
bit bus interfaces, see the MAX196/MAX198 data sheet.
________________________ApplicationsIndustrial-Control Systems
Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
Telecommunications
____________________________Features12-Bit Resolution, 1/2LSB LinearitySingle +5V OperationSoftware-Selectable Input Ranges:
±VREF, ±VREF/2, 0V to VREF, 0V to VREF/2Internal 4.096V or External ReferenceFault-Protected Input Multiplexer (±16.5V)8 Analog Input Channels6µs Conversion Time, 100ksps Sampling RateInternal or External Acquisition ControlTwo Power-Down ModesInternal or External Clock
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface
________________________________________________________________Maxim Integrated Products1
__________________Pin Configuration
Call toll free 1-800-722-8266 for free samples or literature.19-0401; Rev 0; 6/95
Functional Diagram appears at end of data sheet.
Ordering Information continued at end of data sheet.*Dice are specified at TA= +25°C, DC parameters only.
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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= TMINto TMAX, unless otherwise noted.)
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.
VDDto 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
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)(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= TMINto TMAX, unless otherwise noted.)
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)(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= TMINto TMAX, unless otherwise noted.)
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface
_______________________________________________________________________________________5
Note 1:Accuracy specifications tested at VDD= 5.0V. Performance at power-supply tolerance limits guaranteed by Power-Supply
Rejection test. Tested for the ±4.096V input range.
Note 2:External reference: VREF= 4.096V, offset error nulled, ideal last code transition = FS - 3/2LSB.
Note 3:Ground “on” channel; sine wave applied to all “off” channels.
Note 4:Maximum full-power input frequency for 1LSB error with 10ns jitter = 3kHz.
Note 5:Guaranteed by design. Not tested.
Note 6:Use static loads only.
Note 7:Tested using internal reference.
Note 8:PSRR measured at full-scale. VDD= 4.75V to 5.25V.
Note 9:External acquisition timing: starts at rising edge of WRwith control bit ACQMOD = low; ends at rising edge of WRwith
ACQMOD = high.
Note 10:Not subject to production testing. Provided for design guidance only.
Note 11:All input control signals specified with tR= tF= 5ns from a voltage level of 0.8V to 2.4V.
Note 12:tDOand tDO1are measured with the load circuits of Figure 2 and defined as the time required for an output to cross 0.8V
or 2.4V.
Note 13:tTRis defined as the time required for the data lines to change by 0.5V.
TIMING 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= TMINto TMAX, unless otherwise noted.)
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
EFFECTIVE NUMBER OF BITS
vs. INPUT FREQUENCY
MAX199-3
INPUT FREQUENCY (kHz)
EFFECTIVE NUMBER OF BITS
-55-3545105125TEMPERATURE (°C)
REF
(V)
REFERENCE OUTPUT VOLTAGE (VREF)
vs. TEMPERATURE
MAX199-4
-70-5050110130TEMPERATURE (°C)
CHANNEL-TO-CHANNEL
GAIN-ERROR MATCHING (LSB)
CHANNEL-TO-CHANNEL
GAIN-ERROR MATCHING vs. TEMPERATURE
MAX199-7
MAX199-5
-70-5050110130TEMPERATURE (°C)
PSRR (LSB)
POWER-SUPPLY REJECTION RATIO
vs. TEMPERATURE
MAX199-6
-70-5050110130TEMPERATURE (°C)
CHANNEL-TO-CHANNEL
OFFSET-ERROR MATCHING (LSB)
CHANNEL-TO-CHANNEL
OFFSET-ERROR MATCHING vs. TEMPERATURE
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface
_______________________________________________________________________________________7
______________________________________________________________Pin DescriptionFigure 1. Reference-Adjust Circuit
Figure 2. Load Circuits for Enable Time
MAX199
Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface_______________________________________________________________________________________
_______________Detailed Description
Converter OperationThe MAX199, a multi-range, fault-tolerant ADC, uses
successive approximation and internal input track/hold
(T/H) circuitry to convert an analog signal to a 12-bit
digital output. The parallel-output format provides easy
interface to microprocessors (µPs). Figure 3 shows the
MAX199 in its simplest operational configuration.
Analog-Input Track/HoldIn the internal acquisition control mode (control bit D5
set to 0), the T/H enters its tracking mode on WR’s ris-
ing edge, and enters its hold mode when the internally
timed (6 clock cycles) acquisition interval ends. In bipo-
lar mode, a low-impedance input source, which settles
in less than 1.5µs, is required to maintain conversion
accuracy at the maximum conversion rate.
When configured for unipolar mode, the input does not
need to be driven from a low-impedance source. The
acquisition time (tAZ) is a function of the source output
resistance (RS), the channel input resistance (RIN), and
the T/H capacitance.
Acquisition time is calculated by:
For 0V to VREF: tAZ= 9 x (RS+ RIN) x 16pF
For 0V to VREF/2: tAZ= 9 x (RS+ RIN) x 32pF
where RIN= 7kΩ, and tAZis never less than 2µs (0V to
VREFrange) or 3µs (0V to VREF/2range).
In the external acquisition control mode (D5 = 1), the
T/H enters its tracking mode on the first WRrising edge
and enters its hold mode when it detects the second WR
rising edge with D5 = 0. See the External Acquisition
section.
Input BandwidthThe ADC’s input tracking circuitry has a 5MHz small-
signal bandwidth. When using the internal acquisition
mode with an external clock frequency of 2MHz, a
100ksps throughput rate can be achieved. It is possible
to digitize high-speed transient events and measure
periodic signals with bandwidths exceeding the ADC’s
sampling rate by using undersampling techniques. To
avoid high-frequency signals being aliased into the fre-
quency band of interest, anti-alias filtering is recom-
mended (MAX274/MAX275 continuous-time filters).
Input Range and ProtectionFigure 4 shows the equivalent input circuit. The MAX199
can be programmed for input ranges of ±VREF, ±VREF/2,
0V to VREF, or 0V to VREF/2by setting the appropriate
control bits (D3, D4) in the control byte (see Tables 1 and
2). When an external reference is applied at REFADJ, the
voltage at REF is given by VREF= 1.6384 x VREFADJ(2.4V
< VREF< 4.18V).
Figure 3. Operational Diagram
