MAX1144AEAP+ ,14-Bit ADCs, 150ksps, 3.3V Single Supplyapplications such as industrial 1.2µA Shutdown Modeprocess control, instrumentation, and medical a ..
MAX1144AEAP+ ,14-Bit ADCs, 150ksps, 3.3V Single SupplyApplicationsIndustrial Process ControlTOP VIEWIndustrial I/O ModulesREF 1 20 AINData-Acquisition Sy ..
MAX1146BCUP ,Multichannel, True-Differential, Serial, 14-Bit ADCsFeaturesThe MAX1146–MAX1149 low-power, 14-bit, multichan-♦ 8-Channel Single-Ended or 4-Channel Diff ..
MAX1146BCUP+ ,Multichannel, True-Differential, Serial, 14-Bit ADCsApplicationsPortable Data LoggingData Acquisition Pin Configurations appear at end of data sheet.Me ..
MAX1147BEUP ,Multichannel, True-Differential, Serial, 14-Bit ADCsELECTRICAL CHARACTERISTICS(V = 5V (MAX1146/MAX1148), V = 3.3V (MAX1147/MAX1149), SHDN = V , V = 0, ..
MAX1149BCUP+ ,Multichannel, True-Differential, Serial, 14-Bit ADCsFeaturesThe MAX1146–MAX1149 low-power, 14-bit, multichan-♦ 8-Channel Single-Ended or 4-Channel Diff ..
MAX3485CSA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485CSA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485CSA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3485CSA+T ,3.3V Powered, 10Mbps and Slew-Rate Limited, True RS-485/RS-422 Transceivers
MAX3485CSA-T ,3.3V Powered, 10Mbps and Slew-Rate Limited, True RS-485/RS-422 Transceivers
MAX3485ECSA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX1144AEAP+
14-Bit ADCs, 150ksps, 3.3V Single Supply
General DescriptionThe MAX1144/MAX1145 are 150ksps, 14-bit ADCs.
These serially interfaced ADCs connect directly to
SPI™, QSPI™, and MICROWIRE™ devices without
external logic. They combine an input scaling network,
internal track/hold, clock, and three general-purpose
digital output pins (for external multiplexer or PGA con-
trol) in a 20-pin SSOP package. The excellent dynamic
performance (THD ≥90dB), high speed (150ksps in
bipolar mode), and low power (8.0mA) of these ADCs
make them ideal for applications such as industrial
process control, instrumentation, and medical applica-
tions.
The MAX1144 accepts input signals of 0 to +6V (unipo-
lar) or ±6V (bipolar), while the MAX1145 accepts input
signals of 0 to +2.048V (unipolar) or ±2.048V (bipolar).
Operating from a single 3.135V to 3.465V analog digital
supply, powerdown modes reduce current consump-
tion to 0.15mA at 10ksps and further reduce supply
current to less than 20µA slower data rates.
A serial strobe output (SSTRB) allows direct connection
to the TMS320 family digital-signal processors. The
MAX1144/MAX1145 user can select either the internal
clock or an external serial-interface clock for the ADC to
perform analog-to-digital conversions.
The MAX1144/MAX1145 feature internal calibration cir-
cuitry to correct linearity and offset errors. On-demand
calibration allows the user to optimize performance.
Three user-programmable logic outputs are provided
for the control of an 8-channel mux or PGA.
The MAX1144/MAX1145 are available in a 20-pin SSOP
package and are fully specified over the -40°C to
+85°C temperature range.
ApplicationsIndustrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Medical Instruments
Portable and Battery-Powered Equipment
Features150ksps (Bipolar) and 125ksps (Unipolar)
Sampling ADC14 Bits, No Missing Codes1LSB INL Guaranteed-100dB THD 3.3V Single-Supply OperationLow-Power Operation
5mA typ (Unipolar Mode)1.2µA Shutdown ModeSoftware-Configurable Unipolar and Bipolar Input
Ranges
0 to +6V and ±6V (MAX1144)
0 to +2.048V and ±2.048V (MAX1145)Internal or External ClockSPI/QSPI/MICROWIRE TMS320-Compatible Serial
Interface Three User-Programmable Logic Outputs Small 20-Pin SSOP Package
MAX1144/MAX1145
14-Bit ADCs, 150ksps, 3.3V Single Supply
Pin Configuration
Ordering Information19-2465; Rev 0; 4/02
Ordering Information continued at end of data sheet.
Functional Diagram and Typical Application Circuit appear
at end of data sheet.SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
MAX1144/MAX1145
14-Bit ADCs, 150ksps, 3.3V Single Supply
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(AVDD= DVDD= 3.3V ±5%, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF=
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.
AVDDto AGND, DVDDto DGND..............................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AIN to AGND ....................................................................±16.5V
CREF, REF to AGND................................-0.3V to (AVDD+ 0.3V)
Digital Inputs to DGND.............................................-0.3V to +6V
Digital Outputs to DGND.........................-0.3V to (DVDD+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
20-Pin SSOP (derate 8.00mW/°C above +70°C).........640mW
Operating Temperature Ranges
MAX114_ _CAP...................................................0°C to +70°C
MAX114_ _EAP................................................-40°C to +85°C
Storage Temperature Range.............................-60°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX1144/MAX1145
14-Bit ADCs, 150ksps, 3.3V Single Supply
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= 3.3V ±5%, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF=
MAX1144/MAX1145
14-Bit ADCs, 150ksps, 3.3V Single Supply
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= 3.3V ±5%, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, VREF=
2.048V, CREF= 4.7µF, CCREF= 1µF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS (Figures 5 and 6)(AVDD= DVDD= 3.3V ±5%, TA= TMINto TMAX, unless otherwise noted.)
MAX1144/MAX1145
14-Bit ADCs, 150ksps, 3.3V Single Supply
TIMING CHARACTERISTICS (Figures 5 and 6) (continued)(AVDD= DVDD= 3.3V ±5%, TA= TMINto TMAX, unless otherwise noted.)
Note 1:Tested at AVDD= DVDD = 3.3V, bipolar input mode.
Note 2:Relative accuracy is the deviation of the analog value at any code from its theoretical value after the gain error and offset
error have been nullified.
Note 3:Offset nullified.
Note 4:Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle. Includes
the acquisition time.
Note 5:Acquisition time is 5 clock cycles in short acquisition mode and 13 clock cycles in long acquisition mode.
Note 6:Performance is limited by the converter’s noise floor, typically 300µVP-P.
Note 7:When an external reference has a different voltage than the specified typical value, the full scale of the ADC scales propor-
tionally.
Note 8:Defined as the change in positive full scale caused by a ±5% variation in the nominal supply voltage.
Typical Operating Characteristics(MAX1144/MAX1145, AVDD= DVDD= 3.3V, fSCLK= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps),
bipolar input, REF = 2.048V, 4.7µF on REF, 1µF on CREF, TA= +25°C, unless otherwise noted.)
